Device to regulate pad load and press incorporating said device

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming and can be used in presses for adjusting load acting on press pad. Pad is arranged under the press slider. Proposed device comprises hydraulic cylinder that makes proposed press pad, hydraulic control valve communicated therewith, hydraulic source, unit to control degree of opening, unit to determine pad lowering rate and unit to correct signal. Said hydraulic source communicates via hydraulic control valve with aforesaid cylinder. Unit to control degree of opening generates signal to regulate degree of opening of aforesaid hydraulic control valve proceeding from preset pressure in hydraulic cylinder. Unit to correct signal corrects control signal in compliance with preset pressure in hydraulic cylinder and press pad lowering rate.

EFFECT: automatic control over load on pad.

5 cl, 5 dwg

 

The technical field to which the invention relates.

The present invention relates to a device for the load control of air bags for load regulation pillows stamp and press machine containing the control unit loads the pillows.

The level of technology

In the press machine, for example, when the crank shaft is driven by the motor for rotation, a crank shaft operates to convert the rotary motion in the up-down motion, thereby moving up and down the slide connected with the shaft of the crank.

When lowering of the RAM extrusion press machine is performed by placing the workpiece between the upper part of the stamp is fixed on the bottom surface of the slide, and the lower part of the stamp is located under the slider.

The mechanism of the airbag is located under the slider for the perception of burden descended of the slide (i.e. the upper part of the stamp during pressing.

Figure 1 shows the mechanism of the pillow. The mechanism cushions attached to the frame 28 as the lower structural element forming machines and includes a punch plate 45 having an upper surface on which is fixed the lower part of the stamp, the clamp 46 to the workpiece, which is located in the lower part of the stamp 43, lots of pins 47 pillows that support the clamp 46 for procurement with bottom STO the ons, plate 49 for pins, which supports the pins 47 cushion on the bottom and the lining 14 of the cushion, which supports the plate 49 to the pins from the bottom side.

The mechanism pillows additionally includes a hydraulic cylinder 2 and the pneumatic cylinder 53 to perception pressing load acting on the lining 14 of the pillow.

Pillow stamp is formed by a clamp 46 for billets, pins 47 pillows, plate 49 for pins, the lining 14 of the pillow and the hydraulic cylinder 2.

When the slider 54 is lowered so that the upper punch 56 is in contact with the clamp 46 to the workpiece during pressing, the plate 49 to pin down and the lining 14 of the cushion in contact with the plate 49 for pins, respectively omitted.

At this time, the press load applied from the upper part of the punch 56 to the lining 14 of the cushion is supported by a hydraulic cylinder 2 and the pneumatic cylinder 53, located at the bottom of the lining 14 of the pillow.

The set pressure value of the hydraulic cylinder 2 is set in advance relative to the rotation angle of the crank shaft, in order to obtain a suitable performance of the cushion. For example, the set value of pressure set constant.

Forging machine additionally includes a control unit load pillows. As CSP is shown in figure 1, the control unit load cushion comprises a hydraulic cylinder 2, the servo valve 4, which is connected to the hydraulic cylinder 2, the hydraulic tank 6, which is connected to the hydraulic cylinder 2 through the servo valve 4, the pressure sensor 12, which detects the hydraulic pressure of the hydraulic cylinder 2, and regulating the degree of opening of the block 11, which compares the set value of the pressure defined by the pressure received by the pressure sensor 12, and controls the degree of opening of the servo valve 4 so that the hydraulic pressure of the hydraulic cylinder 2 is set to pressure.

However, when adjusting feedback is regulating the degree of opening of the block 11, the lowering speed of the RAM 54 is changed in accordance with the rotation angle of the crank shaft, thereby deteriorating the characteristics of the regulation. In particular, since the lowering speed of the RAM 54 is reduced in position near BDC (bottom dead point), the pressure of the hydraulic cylinder 2 becomes substantially less than the threshold pressure.

For this reason, in patent document 1 performs the following control.

The control unit load pillows, disclosed in patent document 1 determines the speed of lowering of the RAM and performs correction of the regulation, so that operation of the servo valve was directed to its closing position when lowering speed of the RAM becomes smaller as the slider approaches the NMT. Therefore, the hydraulic pressure of the hydraulic cylinder is adjusted to be closer to the set pressure value.

[Patent document 1]

Japanese laid patent publication No. H04 (1992)-172199 "Device pressure regulating pillows stamp CNC"

However, although the device of the load control pillows, disclosed in patent document 1, adjusts the degree of opening of the servo valve in accordance with the speed of lowering of the RAM, if the regulation described in patent document 1, occurs when the installed load pillows stamp varies depending on differences in the type of the workpiece as an object pressing, hydraulic pressure of the hydraulic cylinder deviates from the set value of the pressure. As a result, the problem lies in the fact that the actual load that acts on the pillow stamp, deviates from the set value of the load.

The invention

Therefore, the first objective of the invention is to provide devices of the load control pillows that can automatically prevent the deviation of the actual load, the action is happening on the pillow stamp from the set value of the load, even when the set value of the load cushion of stamp varies depending on differences in the type of the workpiece as an object pressing.

In addition, the second objective of the invention is to provide a press machine with a control unit load pillows that can automatically prevent the deviation of the actual load acting on the pillow stamp from the set value, even when the set value of the load cushion stamp is changed.

According to the invention for achieving the first task for the press machine provided by the control unit load pillows for regulating the pressing load acting on the pillow of the stamp is located under the slider is configured to move up and down, and the control unit load cushion comprises: a hydraulic cylinder, forming a cushion stamp; hydraulic control valve, made with the possibility of connection with the hydraulic cylinder; a hydraulic source, made with the possibility of connection with the hydraulic cylinder through a hydraulic control valve; regulating the degree of opening of the unit executed with the capability of issuing a control signal for regulating the opening degree of the hydraulic who reguliruyushego valve on the basis of the set value of the pressure of the hydraulic cylinder; the unit of velocity determination made with the possibility of determining the speed of lowering of the cushion stamp; and the power adjustment signal is configured to adjust the value of the control signal in accordance with the set pressure value and the speed value is depressed, a certain unit of velocity determination; the degree of opening of the hydraulic control valve is regulated on the basis of the control signal is adjusted by the power adjustment signal.

With the described configuration, since the power adjustment signal adjusts the signal, taking into account not only the speed of lowering of the cushion stamp, but also the set pressure value of the hydraulic cylinder, it is possible to automatically prevent deflection hydraulic pressure of the hydraulic cylinder from the set value of the pressure, even when the installed load pillows stamp (i.e. the set pressure value of the hydraulic cylinder) greatly changes.

According to a preferred variant of the invention, the power adjustment signal is configured to adjust a value of the control signal so that the degree of opening of the hydraulic control valve is greater when increasing the set value of the pressure.

Hydraulic pressure guide is aplicacao cylinder, in General, tends to become smaller than the set pressure value in position about the LDP, as the set pressure value becomes larger, and becomes more than the set pressure value in position about the LDP, as the set value of the pressure becomes less.

However, in this embodiment, it is possible to suppress the tendency, because the value of the control signal is adjusted so that the degree of opening of the hydraulic control valve is reduced so much that it becomes a set pressure value.

According to another preferred variant of the invention, the power adjustment signal is configured to adjust a value of the control signal so that the degree of opening of the hydraulic control valve is more reduced when the speed is reduced, lowering pillows stamp.

The hydraulic pressure of the hydraulic cylinder has a General tendency such that the hydraulic pressure decreases more than the set pressure as the speed of lowering of the cushion stamp becomes slower.

However, in this embodiment, since the value of the control signal is adjusted so that the degree of opening of the hydraulic reg is youseo valve is reduced, when lowering speed cushions stamp becomes slower, it is possible to adjust the changed set value of the pressure and speed of the lowering of the cushion stamp.

According to the invention for achieving the second objective of the proposed forging machine, comprising: an engine; an element of rotation, driven in rotation by the motor; a transformation mechanism that is configured to convert the rotational motion of the element rotation to reciprocating motion; a slider made with the possibility of connection with a conversion mechanism for making reciprocating movement; and a control unit load pillows made with adjustable pressing load acting on the pillow of the stamp is located under the slider, the control unit loads the airbag contains a hydraulic cylinder, forming a cushion stamp; hydraulic control valve, made with the possibility of connection with the hydraulic cylinder; a hydraulic source, made with the possibility of connection with the hydraulic cylinder through a hydraulic control valve; regulating the degree of opening of the unit executed with the capability of issuing a control signal for regulating the opening degree of the hydraulic regulate what its valve on the basis of the set value of the pressure of the hydraulic cylinder; the unit of velocity determination made with the possibility of determining the speed of lowering of the cushion stamp; and the power adjustment signal is configured to adjust the value of the control signal in accordance with the set pressure value and the speed value is depressed, a certain block determine the speed and degree of opening of the hydraulic control valve is regulated on the basis of the control signal is adjusted by the power adjustment signal.

In the press machine with the described configuration, since the power adjustment signal adjusts the control signal, taking into account not only the speed of lowering of the cushion stamp, but also the set pressure value of the hydraulic cylinder, it is possible to automatically prevent deflection hydraulic pressure of the hydraulic cylinder from the set value of the pressure, even when the installed load pillows stamp (i.e. the set pressure value of the hydraulic cylinder) greatly changes.

According to the invention for achieving the first objective of the proposed regulation load cushion for a press machine, which regulates the pressing load acting on the pillow of the stamp is located under the slider is configured to move up and the bottom, moreover, the adjusting device load pillows includes: a servo motor, a transmission unit of energy, is arranged to convert the rotational motion of the servo motor in the up-down motion to move up and down pillows stamp; a control unit provisions made with the possibility of issuing a control signal for adjusting the height of the pillow stamp on the basis of the set value of the load cushion of the stamp; the unit of velocity determination made with the possibility of determining the speed of lowering of the cushion stamp; and the power adjustment signal is configured to adjust a value of the control signal in response to the set load value and the speed value is lower, determined by the block determining the speed at this height pillows stamp is regulated on the basis of the control signal is adjusted by the power adjustment signal.

With the above configuration, since the control signal is adjusted based on the set value of load and speed lowering pillows stamp, it is possible to automatically prevent the deviation of the actual load acting on the pillow stamp from the set value of the load in accordance with the changed set value of load and speed lowering pillows stamp.

As is isano above, according to the invention, it is possible to automatically prevent the deviation of the hydraulic pressure from the set value of the pressure when the installed load pillows stamp is changed.

Brief description of drawings

Figure 1 is a schematic view illustrating the General construction of devices of the load control and the mechanism of the pillow pressing machine according to the prior art.

Figure 2 is a schematic view illustrating the construction of device regulation load cushion according to the first variant embodiment of the invention.

Figa is a graph illustrating the value of the actual hydraulic pressure and the set pressure value, when the hydraulic adjustment is performed on the basis of changes in the speed of lowering of the lining of the pillow.

Figv is another graph illustrating the value of the actual hydraulic pressure and the set pressure value, when the hydraulic adjustment is performed on the basis of changes in the speed of lowering of the lining of the pillow.

Figs is another graph illustrating the value of the actual hydraulic pressure and the set pressure value, when the hydraulic adjustment is performed on the basis of changes in the speed of lowering is okladki pillows.

Figa is a graph illustrating the value of the actual hydraulic pressure and the set pressure value, when the hydraulic adjustment is performed on the basis of the set pressure and the speed of lowering of the lining of the pillow.

FIGU is a graph illustrating the value of the actual hydraulic pressure and the set pressure value, when the hydraulic adjustment is performed on the basis of the set pressure and the speed of lowering of the lining of the pillow.

Figs is a graph illustrating the value of the actual hydraulic pressure and the set pressure value, when the hydraulic adjustment is performed on the basis of the set pressure and the speed of lowering of the lining of the pillow.

Figure 5 is a schematic view illustrating the construction of device regulation load cushion according to the second variant embodiment of the invention.

Description of the preferred option of carrying out the invention

Next in detail with reference to the accompanying drawings will be described preferred embodiments of the invention. In addition, in the respective drawings, the same reference position represent the same ELEH the patients and their repeated description will be omitted.

[The first version of the implementation]

The press machine includes an engine, a crank shaft as an element of rotation, driven in rotation by the motor for converting rotary motion into reciprocating, a slide connected with the shaft of the crank to move up and down, the upper stamp, which is fixed on the bottom surface of the slide, and mechanism of pillows, which is located under the slide, and to which the load is applied from the top of the stamp, when the slide is lowered. In addition, the crank shaft as an element of rotation and mechanical means connected with the shaft of the crank constitute a conversion mechanism that converts rotational movement of the element rotation to reciprocating movement of the slide, but the mechanism of transformation may be suitably made in the form, for example, a Cam or similar.

Because the mechanism of the pillow has the same design as the design shown in figure 1, the description will be omitted. In this mechanism pillow press load, which is applied from the slider (i.e. the upper stamp) to the lining 14 of the pillow during pressing, is set by the value of the hydraulic pressure of the hydraulic cylinder 2.

Forging machine provided with a device for regulating the load cushion, which performs the reg is the key to maintaining the value of the hydraulic pressure of the hydraulic cylinder 2 to the prescribed pressure value during pressing.

Figure 2 shows the device 10 of regulation load cushion according to the first variant implementation. As shown in figure 2, the device 10 of regulation load cushion comprises a hydraulic cylinder 2, the servo valve 4 connected to the hydraulic cylinder 2, the hydraulic tank 6 connected to the hydraulic cylinder 2 through the servo valve 4, block 8 teams load, made with the possibility of issuing the set value of the pressure of the hydraulic cylinder 2 in accordance with the input conditions of pressing, for example, by the operator, and regulating the degree of opening of the block 11 is configured to issue a control signal for regulating the degree of opening of the servo valve 4 on the basis of the set value of the pressure, which is introduced by the block 8 teams load.

In addition, the hydraulic control valve is made in the form of a servo valve 4, but may be in the form of other suitable elements. The hydraulic source is made in the form of a hydraulic tank 6, but may be in the form of other suitable elements.

Regulating the degree of opening of the unit 11 outputs the control signal to maintain the value of the hydraulic pressure of the hydraulic cylinder 2 to the prescribed pressure value on the basis of the difference obtained by the comparison set C is achene pressure, issued unit 8 commands load, and a certain value of hydraulic pressure, which is issued by the sensor 12 pressure (PT) as the measurement sensor hydraulic pressure of the hydraulic cylinder 2.

The control signal is injected into the servo valve 4 by the following block 18 adjustment signal and the limiter 9. The servo valve 4 controls the degree of opening on the basis of the input control signal. For example, the control signal can be a voltage signal, and the degree of opening of the servo valve proportional to the voltage value.

In addition, since the press load is applied from the slider to the hydraulic cylinder 2 during the pressing, the value of the hydraulic pressure of the hydraulic cylinder more hydraulic pressure of the hydraulic tank 6. During pressing, in which the piston of the hydraulic cylinder 2 is lowered, the degree of opening of the servo valve 4 is adjusted to regulate the flow of the hydraulic cylinder 2 to the hydraulic Baku 6, thereby maintaining the value of the hydraulic pressure of the hydraulic cylinder 2 to the prescribed pressure value.

Under this option, the exercise device 10 of regulation load pressure includes a sensor 15 speed, which determines the speed of lowering of p the darlings of the stamp.

The sensor 15 can be made in the form, for example, element or unit for measuring the speed of lowering of the cushion stamp based on certain values, obtained by the speed sensor for measuring the speed or travel sensor for measuring the progress of the lining 14 of the cushion or the slider. Alternatively, the sensor 15 can be made in the form of an element for calculating the speed of lowering of the cushion stamp on the basis of determining the values of the rotation angle of the crank shaft received by the transducer angle code, and given the relationship between the rotation angle of the crank shaft and the speed of lowering of the lining 14 of the pillow.

In addition, the unit rate for measuring the speed of lowering of the cushion stamp made in the form of sensor 15 speed, but can be made in the form of other suitable elements.

Next will be described a case in which the speed of lowering of the cushion stamp is determined on the basis of the speed of the lining 14 of the pillow.

The device 10 of regulation load cushion further comprises a block 18 of the adjustment signal that adjusts the value of the control signal issued by regulating the degree of opening of the unit 11, in accordance with the pressure value generated by the block 8 teams load, and the speed of lowering of the lining 14 of the cushion defined by the sensor 15 MSE of the spine.

As shown in figure 2, block 18 adjustment signal includes a unit 18a and a calculation unit 18b add. Unit 18a calculation calculates the correction value on the basis of the set value of the pressure generated by the block 8 teams load, and values determine the speed of the lining 14 of the cushion defined by the sensor 15 speed.

Unit 18b adding outputs the corrected control signal by adding a correction value output unit 18a calculations, the value of the control signal issued by regulating the degree of opening of the block 11.

First, for comparison, will be described a case in which the block 18 adjustment signal adjusts the control signal based on the value of the rate among the set value of the pressure values determine the speed of the lining 14 of the cushion defined by the sensor 15 speed. Then will be described another case in which the control signal is adjusted on the basis of how values determine the speed and the set value of the pressure.

Block 18 adjustment signal adjusts the value of the control signal so that the degree of opening of the servo valve 4 is reduced as the speed of lowering of the lining 14 of the cushion is reduced. In this case, the adjustment value may be set so that the correction value C is Nala control proportional to the speed of lowering of the lining 14 of the pillow.

The graphs figa-3C, the ordinate indicates the value of the hydraulic pressure of the hydraulic cylinder 2, and the abscissa indicates the angle of rotation of the crank shaft. The angle of the crank shaft indicates the actual angle of the crank shaft. The crawler performs a reciprocating movement once between TDC (top dead center) and BDC (bottom dead point) during one full rotation of the crank shaft. On figa-3C angle of the crank shaft when the slider is at TDC, is set equal to 0 degrees, the angle of the crank shaft increases as the slider approaches the NMT, and when the slide arrives at BDC, the angle of the crank shaft is equal to 180 degrees. The angle of the crank shaft further increases as the slider comes close to TDC after passing through the NMT, and when the slide arrives at TDC, the angle of the crank shaft is set to 360 degrees, which is the same rotational position, which is at 0 degrees. In addition, figa-3C, dashed line indicates the set value of the pressure, which is displayed by the unit 8 commands load, and the solid line indicates the value of the actual hydraulic pressure of the hydraulic cylinder 2, when the control signal is adjusted based on the speed of lowering of the lining 14 hearth is key. In the example shown in figa-3C, when the rotation angle of the crank shaft is at 120 degrees, the lining 14 of the pillow starts to fall, and when the angle of the crank shaft is 180 degrees, the slider is located in the NMT, thereby allowing the piston of the hydraulic cylinder 2 to be in its most sdavlennoy condition.

When PRdenotes the nominal pressure drop of the servo valve 4, PTindicates the pressure value of the hydraulic tank 6 and PCdenotes the set pressure value of the hydraulic cylinder 2, figa indicates the case where PR=PC-PT, figv indicates the case where PR<<PC-PTand figs indicates the case where PR>>PC-PT.

As will be clear from the instructions figa-3C, in the case where PR=PC-PTthe value of the actual hydraulic pressure is identical to the set pressure value for the start time of the press. However, in the case where PR<<PC-PTdue to the increased set point pressure value is exceeded, at which the value of the actual hydraulic pressure takes place after the set value of the pressure becomes greater during startup, press, and the value of the actual pressure becomes less than the set pressure, politiical NMT.

In addition, in the case where PR>>PC-PTthe amount of excess for which the value of the actual hydraulic pressure takes place after the set value of the pressure becomes smaller at the time of starting the press, but the value of the actual hydraulic pressure becomes greater than the set pressure, in position about the LDP.

Thus, when the adjustment control signal based on the speed of lowering of the lining 14 of the pillow, in the case where PR=PC-PTthe value of the actual hydraulic pressure is identical to the set pressure value, in addition to the initial pressing. However, when the set value of the pressure largely rejected from PC=PT+PRthe value of the actual pressure is quite far from the set value of the pressure.

For this reason, according to this variant implementation unit 18 adjustment signal adjusts the control signal based on the set value of the pressure of the hydraulic cylinder 2, and the speed of lowering of the lining 14 of the pillow.

Below will be described the case in which the control signal is adjusted based on the set value of the pressure and velocity of the lower lining 14 of the pillow.

As shown in figure 2, the block 18a Vice the Department calculates the correction value of the control signal on the basis of the set value of pressure, issued unit 8 commands load, and the speed of lowering of the lining 14 of the pillow, which is issued by the sensor 15 speed.

Block 18 adjustment signal adjusts the control signal so that the degree of opening of the servo valve 4 is reduced more and more as the set value of pressure increases.

When the value of the control signal is adjusted so get the result shown in figa-4C. Figa shows the case where PR=PC-PT, figv shows the case where PR<<PC-PTand figs shows the case where PR>>PC-PT.

As clearly seen from tiga-4C, the value of the actual hydraulic pressure is identical to the set pressure value, in addition to the initial pressing.

This correction value can be proportional, for example, formula 1, below.

[Formula 1]

In formula 1, PRPCand PTare the same as those described above, and V denotes the speed of lowering of the lining 14 of the pillow.

In addition, in this example, the speed V corresponds to the speed of lowering of the lining 14 of the pillows from the moment when the lining 14 of the pillow starts to fall, until the lining 14 of the pillow arrives in NMT, and becomes 0 when the lining modeski arrives in the LDP. After the LDP speed V is equal to 0.

Thus, the adjustment value is increased, as shown in the formula 1, as the speed V becomes lower faster.

As is clear from formula 1, the adjustment value is also proportional to the formula 2.

[Formula 2]

Thus, as shown in the formula 2, it is possible to perform adjustment in accordance with the projected reference value of the servo valve 4, since the correction value is set so as to decrease as the set value of pressure increases, given the nominal pressure drop PRthe servo valve 4 and the pressure PThydraulic tank 6.

In addition, in the case where the hydraulic cylinder 2 is connected with the fluid tank 6 through a set of servo-valves 4, placed in parallel, and the degree of opening of these servo-valves 4 are regulated synchronized manner, it is desirable to consider the number of servo-valves 4.

It is desirable to consider the working area of the hydraulic cylinder 2 or a nominal flow rate of the servo valve 4.

Formula 3 indicates the correction value, taking into account such factors.

[Formula 3]

In the formula 3 n denotes the number of servo-valves 4, oboznachaet the working area of the lower chamber of the hydraulic cylinder, and QRdenotes the nominal value of the flow of the servo valve 4.

Based on the adjustment values specified in the formula 3, it is possible to adjust the degree of opening, given the number n of servo-valves 4, the working area of A hydraulic cylinder 2 and the nominal value of the QRflow servo valve 4.

[Second variant implementation]

Figure 5 shows the design of the device 20 regulation load cushion according to the second variant embodiment of the invention. The mechanism of the air bags of the second variant implementation is supplied by a servo motor 26 instead of the hydraulic cylinder 2, as shown in figure 2. The servo motor 26 moves up and down the lining 14 of the cushion to control the load, which acts on the lining 14 of the pillow. Hereinafter will be described in blocks different from the first version of the implementation. Other blocks may be the same or similar blocks described in the first embodiment.

The device 20 regulation load cushion according to the second variant implementation includes a sensor 24 of the load as a unit load measurement, which is fixed on the lower surface of the lining 14 of the cushion to determine the load acting on the lining 14 of the pillow during the pressing rod 25, which is connected with the lower part of the sensor 24 of the load and is driven for the aromasine up and down, and move up and down lining 14 of the pillow, and the servo motor 16, which drives the ball nut 29 which is subject to rotation by a drive belt 27.

Ball nut 29 is set, for example, on the frame 29 of the press machine so as to be rotated but not moved in the vertical direction. Ball screw 32 is made in the rod 25 for screw engagement with a threaded ball nut 29. Thus, when the ball nut 29 is driven to rotate, the rod 25 is moved up and down. In addition, a means (unit) energy transfer is formed by a drive belt 27 and a ball nut 29, but may be in the form of other suitable elements.

The device 20 regulation load cushion comprises a block 8 teams load, which displays the preset load value, and the block 34 regulatory provisions, which produces the control signal to rotate the servo motor 26 on the basis of the set value of the load, which is a block of 8 teams load.

Block 34 regulatory provisions compares the set value load value determining the load defined by the sensor 24 of the load, and performs adjustment so that the load acting on the lining 14 of the pillow becomes the specified value load (set mn is in the load) on the basis of the comparison result.

In the same way as in the first embodiment, the device 20 load regulation pillows additionally includes a sensor 15 speed, which determines the speed of lowering of the lining 14 of the pillow.

In addition, the device 20 load regulation pillows additionally includes block 18a calculation, which calculates the correction value of the control signal on the basis of the set value of the load, which is issued by the unit 8 commands load and speed values lowering defined by the sensor 15 speed.

Then the block 18b add device 20 regulation load cushion adjusts the control signal by adding a correction value that is entered in block 18a of the calculation to the value of the control signal, which is entered by the block 34 regulatory provisions.

Block 36 motor receives the adjusted control signal and provides the passage of current to the motor 26 through the limiter 9 within a specified time to bring the servo motor 26 during the rotation the angle of rotation in accordance with the adjusted control signal.

Thus, since the control signal is adjusted based on the set value of the load and the speed of lowering of the lining 14 of the pillow, it is possible to limit the deviation of the actual load, the conditions, acting on the lining 14 of the cushion, from the set value of the load in accordance with the changed set value of the load and the speed of lowering of the lining 14 of the pillow.

[Other embodiments of]

The invention is not limited to the preferred option, but may be certainly modified in various ways within the scope not departing from the essence of the invention.

1. The control unit loads the pillow pressing machine for regulating the press load acting on the pillow of the stamp is located under the slider is configured to move up and down, containing the hydraulic cylinder, forming a cushion stamp, hydraulic control valve, made with the possibility of connection with a hydraulic cylinder, a hydraulic source, made with the possibility of connection with the hydraulic cylinder through a hydraulic control valve that regulates the degree of opening of the unit executed with the capability of issuing a control signal for regulating the opening degree of the hydraulic control valve on the basis of the set value of the pressure of the hydraulic cylinder, the unit of velocity determination made with the possibility of determining the speed of lowering pillows stamp, and the power adjustment signal is configured to adjust a value of the control signal in accordance with the set pressure value of the hydraulic cylinder and the speed of lowering of the cushion stamp certain block determine the speed, the degree of opening of the hydraulic control valve is regulated on the basis of the control signal is adjusted by the power adjustment signal.

2. The device according to claim 1, in which the power adjustment signal is configured to adjust a value of the control signal so that the degree of opening of the hydraulic control valve decreases with increasing the set value of the pressure of the hydraulic cylinder.

3. The device according to claim 1 or 2, in which the power adjustment signal is configured to adjust a value of the control signal so that the degree of opening of the hydraulic control valve is reduced when the speed is reduced, lowering pillows stamp.

4. Forging machine containing the engine, the conversion mechanism includes an element of rotation of the motor-driven to make the rotational motion, and is arranged to convert rotary motion into reciprocating motion, a slide made with the possibility of connection with a conversion mechanism for making reciprocating movement, and a control unit load cushion, made with a load regulation of the press, acting on p is dushku stamp below the slider, the control unit loads the airbag contains a hydraulic cylinder, forming a cushion stamp, hydraulic control valve, made with the possibility of connection with the hydraulic cylinder, the hydraulic source is connected to the hydraulic cylinder through a hydraulic control valve that regulates the degree of opening of the unit executed with the capability of issuing a control signal for regulating the opening degree of the hydraulic control valve on the basis of the set value of the pressure of the hydraulic cylinder, the unit of velocity determination made with the possibility of determining the speed of lowering of the cushion stamp, and the power adjustment signal is configured to adjust the value of the control signal in accordance with the set pressure value of the hydraulic of the cylinder and the speed of lowering of the cushion stamp, a certain block determine the speed and degree of opening of the hydraulic control valve is regulated on the basis of the control signal is adjusted by the power adjustment signal.

5. The control unit loads the pillow pressing machine for regulating the press load acting on the pillow of the stamp is located under the slide, the implementation of the military can move up and down, containing the motor, the transmission unit of energy, is arranged to convert the rotational motion of the servomotor movement up and down to move up and down pillows stamp, the control unit provisions made with the possibility of issuing a control signal for adjusting the height of the pillow stamp on the basis of the set value of the load cushion of the stamp, the unit of velocity determination made with the possibility of determining the speed of lowering of the cushion stamp, and the power adjustment signal is configured to adjust the value of the control signal in accordance with the value of the load cushion of the die and the speed of its descent, a certain block determine the speed, the height of the pillow stamp regulated on the basis of the control signal is adjusted by the power adjustment signal.



 

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FIELD: machining by pressure.

SUBSTANCE: the invention is dealt with the field of machining by pressure and may be used in presses for pressing powder-shaped masses, in particular, the metal powder-shaped masses. The press contains at least one connecting rod, a crankshaft and a connected with it and capable to rotate gear with an eccentric crankshaft drive for driving the unit of the upper plunger. The gear is set in rotation at least by one engine using at least one worm gearing. The press is equipped with electronic control, which is supplied with a function of a reversing mode of operation of the crankshaft. At the press operation a run of the unit of the upper plunger is reversed shortly before reaching of the upper and-or the lower dead point of the eccentric crankshaft drive. The second alternative of operation of the press offers to regulate a run of the unit of the upper plunger so, that the lower dead point of the eccentric crankshaft drive is passing a short way. In result the invention ensures an increase of accuracy of produced pressed items and an over-all performance, and also an increase of the performance index of efficiency of the press operation and expansion of its operational capabilities.

EFFECT: the invention ensures increased accuracy of produced pressed items, over-all performance, increased performance index of the press operation efficiency and expansion of its operational capabilities.

15 cl, 2 dwg

The invention relates to the field of engineering, namely to control systems crank die forging presses

The invention relates to a press-forging equipment, in particular to designs of mechanical presses

Mechanical press // 2217314
The invention relates to forging machinery, namely, mechanical presses

The invention relates to mechanical presses for cutting blanks and stamping of sheet material

The invention relates to the field of engineering, in particular for machine tools-machines and forging machines-machines containing several working bodies working on a given mission profile

The invention relates to the field of forging machinery

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming and can be used in presses for adjusting load acting on press pad. Pad is arranged under the press slider. Proposed device comprises hydraulic cylinder that makes proposed press pad, hydraulic control valve communicated therewith, hydraulic source, unit to control degree of opening, unit to determine pad lowering rate and unit to correct signal. Said hydraulic source communicates via hydraulic control valve with aforesaid cylinder. Unit to control degree of opening generates signal to regulate degree of opening of aforesaid hydraulic control valve proceeding from preset pressure in hydraulic cylinder. Unit to correct signal corrects control signal in compliance with preset pressure in hydraulic cylinder and press pad lowering rate.

EFFECT: automatic control over load on pad.

5 cl, 5 dwg

FIELD: metallurgy.

SUBSTANCE: provide the sheet metal workpiece forming into the sleeve. The forming device includes the punch with the bottom forming section and the wall forming section, the ring workpiece holder, surrounding the punch and having the support surface for positioning the drawn edge, the inner matrix with the bottom forming section and the outer matrix with the wall forming section and the clamping section for gripping the drawn edge and for its pressing against the support surface of the workpiece holder. The workpiece is placed in the open forming device. During the first moulding step, the inner matrix and the outer matrix and the workpiece holder are moved in the drawing direction along with the clamped workpiece. After the workpiece is clamped between the clamping section of the outer matrix and the support surface of the workpiece holder, the two matrices are moved together in the same direction at different speeds. During one of the moulding process stages the inner matrix overtakes the outer matrix, or vice versa.

EFFECT: reduction of ruptures at the workpiece edge sections.

12 cl, 9 dwg

FIELD: machining by pressure.

SUBSTANCE: the invention is dealt with the field of machining by pressure and may be used in presses for pressing powder-shaped masses, in particular, the metal powder-shaped masses. The press contains at least one connecting rod, a crankshaft and a connected with it and capable to rotate gear with an eccentric crankshaft drive for driving the unit of the upper plunger. The gear is set in rotation at least by one engine using at least one worm gearing. The press is equipped with electronic control, which is supplied with a function of a reversing mode of operation of the crankshaft. At the press operation a run of the unit of the upper plunger is reversed shortly before reaching of the upper and-or the lower dead point of the eccentric crankshaft drive. The second alternative of operation of the press offers to regulate a run of the unit of the upper plunger so, that the lower dead point of the eccentric crankshaft drive is passing a short way. In result the invention ensures an increase of accuracy of produced pressed items and an over-all performance, and also an increase of the performance index of efficiency of the press operation and expansion of its operational capabilities.

EFFECT: the invention ensures increased accuracy of produced pressed items, over-all performance, increased performance index of the press operation efficiency and expansion of its operational capabilities.

15 cl, 2 dwg

FIELD: heavy engineering industry; production of the drives of the mechanical presses.

SUBSTANCE: the invention is pertaining to the field of heavy engineering industry, to forging, in particular, to production of the drive of the mechanical press and may be used at designing of the drive of the presses with the design drawing providing for usage of the collapsible connecting rod. The drive contains the main and additional electrical engines, the reduction gear of the main shaft and the reduction gear of the additional shaft. The reduction gear of the additional shaft is made in the form of the self-stopping reduction gear with the coaxial input and output shafts. The input shaft of the self-stopping reduction gear is connected to the rotor of the additional electrical engine, which stator is mounted on the additional base. The technical result of the invention is simplification the mechanical press design.

EFFECT: the invention ensures simplification the mechanical press design.

5 dwg

FIELD: technological processes; engines and pumps.

SUBSTANCE: two eccentric shafts are mounted on press frame on both sides in respect of slab course and parallel to it. The shafts are connected to a drive and linked by connecting rod to two slides positioned in frame guides. Two tables with strikers are mounted on slides by four screws of press height adjustment mechanism. Adjustment mechanism features closed height adjustment drive with transmission shaft. The screws are connected in pairs by cogwheels fixed at them. Helical curves of adjoining screws have different direction. Two opposite screws of opposite slides are connected by moving spline joint to the transmission shaft of closed height adjustment drive.

EFFECT: increased precision of process.

1 dwg

Servopress-machine // 2400368

FIELD: electrical engineering.

SUBSTANCE: invention relates to press forming equipment. Proposed machine comprises extrusion ram, servomotor, drive power supply and capacitor. The latter is connected in between power supply positive and negative channels. Said channels connect power supply and motor drive control section. Servomotor starts running on the basis of data on extrusion ram motion on feeding electric power for forming purposes. Machine can define if drive power supply voltage between aforesaid positive and negative channels is lower than servomotor induced voltage. If it is, data related with machine speed are corrected on the basis of data on extrusion ram motion.

EFFECT: stable operation.

18 cl, 7 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming and can be used in presses for adjusting load acting on press pad. Pad is arranged under the press slider. Proposed device comprises hydraulic cylinder that makes proposed press pad, hydraulic control valve communicated therewith, hydraulic source, unit to control degree of opening, unit to determine pad lowering rate and unit to correct signal. Said hydraulic source communicates via hydraulic control valve with aforesaid cylinder. Unit to control degree of opening generates signal to regulate degree of opening of aforesaid hydraulic control valve proceeding from preset pressure in hydraulic cylinder. Unit to correct signal corrects control signal in compliance with preset pressure in hydraulic cylinder and press pad lowering rate.

EFFECT: automatic control over load on pad.

5 cl, 5 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to machine building and can be used in designs of crank presses intended for separation jobs. Proposed press comprises foundation with cylinder with piston rigidly secured therewith. Said piston is licked via rod with slider of actuator consisting of crank and rod. Besides proposed press comprises compressor and internal air lines incorporating gates, check valves, inlet and adjustable outlet valves to communicate cylinder chamber with the compressor, outer air lines and atmosphere. Note here that pressure is generated inside said cylinder to act on slider with constant force when it moved from the start of plastic deformation beginning to its extreme position. Besides force acting on the slider can be decreased to zero when it moves from its extreme operating position to extreme initial position.

EFFECT: higher reliability and longer life.

2 dwg

FIELD: machine building.

SUBSTANCE: press consists of servo-motor, of slider, of holder for securing upper part of punch to slider, of mechanism for power transfer and of block of control of at least servo-motor and holder. The control block facilitates transfer of the slider into a position, when an upper part of the punch sits on the lower part of the punch, the upper part of the punch disconnects from the slider and the slider travels upward into standard position. Also, the slider does not reach an upper dead point. Further, upper and lower parts of the punch are extracted from the press and parts of another punch are installed. The slider is lowered into a position, when the upper part of another punch is attached to it; the said upper part is fastened and the slider is hoisted into the position when punching commences.

EFFECT: reduced time for punch replacement.

8 cl, 8 dwg

FIELD: manufacturing process.

SUBSTANCE: invention relates to systems of crank presses, forming a line of pressing. Angle of rotation control unit of main shaft of crank gear of the press comprises a unit of output of the reference value of the angle of rotation and unit of measurement of the angle provided for each press, the unit issuing the command of speed and the actuation unit. Unit issuing the command displays the value of the command speed to the electric motor of the corresponding press taking into account the reference and the measured values of the angle of rotation of the main shaft. The actuation unit controls the speed of the electric motor of the respective press. The unit provides the unit of correction. The said unit adjusts the value of command speed or the reference value of the angle of rotation. Adjustment is made so that the difference between the reference value and the angle of rotation of the main shaft for each of the presses is within the predetermined range.

EFFECT: improved accuracy is provided by controlling the angle of rotation of the main shaft of the crank gear of the press and prevention of impact on one press of changes of press-load in the other press.

7 cl, 7 dwg

FIELD: machine building.

SUBSTANCE: drive of the press slide includes motors, main crank shaft with a flywheel, which is hinged to the piston rod, and additional crank shaft with additional piston rod. Articulated connecting rod is connected to piston rod of the main crank shaft. Additional shaft is equipped with a release clutch and a flywheel. In the hinge between the piston rod of the main crank shaft and additional piston rod there installed is mutual position sensor of the above piston rods, which is connected to control system by means of a drive.

EFFECT: increasing the resistance to impact of disturbance induced with a gap in the hinge between piston rod of the main crank shaft and additional piston rod and elasticity of the above piston rods.

2 dwg

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