Method of die forming with rolling and device for implementation of this method

FIELD: metallurgy.

SUBSTANCE: method of press forming with rolling includes placement of stock in matrix set on die plate and rolling of stock with rolling press connected to drive which transfers oscillatory movement to rolling press when it is pressed to stock with force. The rolling press is equipped with a gear sector, and the die plate is equipped with a gear rack. When the stock is rolled with the rolling press, gears of the gear sector are in constant mesh with gears of the gear rack to facilitate rolling conditions. The device for die forming with rolling contains the rolling press and the matrix, installed on the die plate for stock placement thereon. The drive of the device connected to the rolling press facilitates pressing of the rolling press to the stock with force, the drive also transfers oscillating movement to the rolling press for rolling the stock with a working surface of the rolling press. The rolling press is equipped with the gear sector, and the die plate is equipped with a gear rack corresponding to the gear sector. The gears of the gear sector are designed to mesh with the gears of the gear rack.

EFFECT: there is facilitated reduction of maximum force of die forming and of speed of rolling.

10 cl, 9 dwg

 

The invention relates to the field of metal forming and can be used in technological processes and equipment for forming tested.

Compared with conventional methods of forming (without spinning) the stamping process tested allows the production of large forgings made of hard steels and alloys, the production of which traditional forging machines is impossible. One of the areas of technology development punching large solid forgings is stamping on the basis of locally-continuous deformation of workpiece - forming by forging. This reduces the maximum clamping, which allows to increase the weight of forgings, improve the utilization ratio of metal to reduce the intensity created by machines.

Know the different equipment for carrying out the stamping process tested (USSR Author's certificate No. 444585, 21D 37/12, publ. 30.09.1974), (USSR Author's certificate No. 444651, 21D 37/12, publ. 30.07.1975), (USSR Author's certificate No. 533427, 21D 37/12, publ. 30.10.1976), (USSR Author's certificate No. 533428, 21D 37/12, publ. 30.10.1976), (USSR Author's certificate No. 617126, 21D 37/12, publ. 30.07.1978), (USSR Author's certificate No. 915336, 21D 37/12, publ. 23.06.1986), (USSR Author's certificate No. 1186331, 21D 37/12, epubl).

All of them are characterized by the fact that sold them the way stamping tested the workpiece placed in the matrix, pass around a roller connected to the drive, providing the roller swinging movement when pressing roller with a force to the workpiece. All of these known technical solutions essentially differ from each other by the design of the drive, providing the roller oscillating movement. Due to the operation of the drive roller inform swinging movement, i.e. a pendulum type motion, in which any direct, located on the working surface of the roller longitudinally relative to its axis of rotation oscillates like a pendulum, and the drum periodically changes the direction of rolling (rotation).

However, this type of movement of the roller inevitable slippage of the working surface of the roller along the surface of the workpiece. This is due to the fact that the main deformation of the blank occurs in the treatment area (running), in which the working surface of the roller is in contact with the workpiece. In contrast to conventional methods of forming layers of metal blanks are deformed unevenly, the upper layers of the metal workpiece and spaced along the length of the workpiece closer to the treatment area are deformed stronger than the lower.

Slip working surface is of Alta on the workpiece by punching tested can be reduced, increasing the maximum clamping and speed run, but in this case, increased energy costs for the implementation of the process, the equipment is bulky, decreases its durability and there is a need to produce a fairly complex design of actuators, respectively, to ensure a sufficiently large clamping and speed spinning. In addition, when the slippage is deteriorating external surface of the forging, and is complicated by the accuracy of their production, as you very properly account (to count or to find experimentally) compliance with weight and dimensions of the workpieces to the size of the stream matrix.

The closest is the technical solution under the Author's certificate of the USSR No. 1253698, 21D 37/12, publ. 30.08.1986.

Technical solution implements a method of forming tested, namely, that the workpiece placed in the matrix, which is mounted on the punch plate, pass around a roller connected to the drive, providing the roller swinging movement when pressing roller with a force to the workpiece.

The nearest analogue of the described device for stamping with phase containing the drum, a matrix mounted on a punch plate for placement on the matrix of the workpiece, the actuator, and the roller is connected with a drive with prob is the possibility of pressing rollers with a force to the workpiece and with the possibility of him swinging movement for spinning the working surface of the roller blanks.

This technical solution has all the above listed restrictions.

Solved by the invention of the challenge - improving technological efficiency of the method and improvement of technical and operational characteristics of the equipment.

The technical result that can be obtained by carrying out the method, reducing the maximum forging force and speed of running, improving the quality of manufacturing of forgings.

The technical result that can be obtained by executing the device, reducing the maximum forging force and speed of running, improving reliability and reducing its metal.

Additional technical result that can be obtained when performing device - to simplify the design of the actuator, the reduction of metal consumption and decreasing the forging force increase its reliability and service life.

To solve the problem with the achievement of the technical result in the known method of forming tested, namely, that the workpiece placed in the matrix, which is mounted on the punch plate, pass around a roller connected to the drive, providing the roller swinging movement when pressing roller with a force to the workpiece, according to the invention the supply roller gear sector, and the punch p is the ITA - gear rack, and when the testing drum workpiece, the teeth of the sector will be in constant engagement with the teeth of the rack to change the technological conditions of running.

Possible additional embodiments of the method, where appropriate, to:

- the diameter of the roller was chosen equal to the pitch diameter of the gear sector to ensure technological conditions of rolling without slipping and without friction, which deform the workpiece only due to the efforts of the pressing rollers to the workpiece;

- the diameter of the roller was chosen less pitch diameter of the gear sector to ensure technological conditions running with friction, in which there is an additional deformation of the workpiece material in the direction of rotation of the roller;

- the diameter of the roller was chosen dividing the diameter of the gear sector to ensure technological conditions running with friction, in which there is an additional deformation of the material of the workpiece in the direction opposite to the direction of rotation of the drum.

To solve the problem with the achievement of the technical result in the known device for stamping with phase containing the drum, a matrix mounted on a punch plate for placement on the matrix of the workpiece, the actuator, the roller associated with PR is vodom with the possibility of pressing rollers with a force to the workpiece and with the possibility of him swinging movement for spinning the working surface of the roller blanks, according to the invention the roller fitted with a toothed sector, and punch plate - gear rack, the corresponding toothed sector, with the teeth of the sector are in engagement with the teeth of the rack.

Possible additional embodiments of the device in which it is advisable to:

- the diameter of the roller was chosen equal to dividing the diameter of the gear sector;

- the diameter of the roller was selected less pitch diameter of the gear sector;

- the diameter of the roller was chosen more dividing diameter gear sector;

- the drive was made of four cylinders, frame, rocker arms, hydraulic tank, pump station, valve, two handles of the control valve spool, respectively, designed to control two of the four hydraulic cylinders, two hydraulic cylinders are installed in the upper part of the frame, and two hydraulic cylinder in its lower part, and between them on the partition frame set punch plate, the upper ends of the two hydraulic cylinders pivotally connected to the frame, and rods pivotally connected to the rocker on the top side, the lower ends of the two hydraulic cylinders pivotally connected to the frame, and rods pivotally connected to the rocker bottom hand, a roller mounted on the lower side of the rocker arm between the cylinders above the matrix, the release of Hydra the tank through the pump station through a pipeline connected to the inlet valve, and the inlet to the outlet valve, the control valve through pipelines connected to each of the hydraulic cylinders, the first inlet/outlet valve connected to the upper fittings of the upper cylinders, a second inlet/outlet valve connected to the lower fittings of the upper cylinders, the third inlet/outlet valve connected to the upper fitting lower left hydraulic cylinder and to the lower fitting of the lower right hydraulic cylinder, the fourth input/output valve connected to the lower fitting of the lower left hydraulic cylinder and to the upper fitting of the lower right hydraulic cylinder.

For the latter, additional options for performing device it is advisable that was introduced at least one spring and two columns, one end of the spring is connected to the sector gear and the other with the rack, to the edges of the rack are connected the ends of the columns, and the columns are located in the holes in the punch plate can travel gear sector together with the rack up and down by using the above-mentioned drive.

These advantages, and features of the present invention are explained the best option its performance with reference to the accompanying figures.

Figure 1 depicts the drum, fitted with a toothed sector, and subcate the rail;

Figure 2 depicts the scheme stamping tested for figure 1, in which the diameter of the roller is chosen equal to the pitch diameter of the gear sector;

Figure 3 same as figure 2, in which the diameter of the roller choosing smaller pitch diameter of the gear sector;

Figure 4 - same as figure 2, in which the diameter of the roll choose more dividing diameter gear sector;

5 is a schematically an installation for implementing the inventive method without piping (rear view);

6 - same as figure 5, with the lowered roller;

Fig.7. same as Fig.6, with the circuit piping connections (front view);

Fig is the same as Fig.7, when implementing the swing roller clockwise;

Fig.9 is the same as Fig.7, when implementing the swing roller counterclockwise.

Method of forming tested (Fig.1-4) is that the workpiece 1 is placed in the matrix 2, which is mounted on the punch plate 3 (figure 5-9), pass around the roller 4. The roller 4 is connected with a drive providing the roller 4 swinging (rotational) movement during the pressing roller 4 with a force to the workpiece 1. The roller 4 provide the sector gear 5, and the punch plate 3 - toothed rack 6. Before testing drum 4 of the workpiece 1, the teeth of the sector 5 are in constant engagement with the teeth of the rail 6, which allows you to change the technological condition of running.

Possible i.e. monitoring) reference what I stated way, at least three technological conditions.

The implementation of the first technological conditions (figure 2).

The roller 4 is lowered down and the workpiece 1 is pressed into the stream of the matrix 2, partially deformed (Position 1). Next, at constant pressure top laminate roller 4, pressing the metal of the workpiece 1 in the stream matrix 2 and moving (rolling) on the stream to the left (Position 2). Then rolled the roller 4 in the opposite direction (figure 2 not shown). After running return roller 4 to the initial position (Position 1). Stamping tested workpiece 1 is completed.

In the implementation of stamping-running side of the roll 4 is rigidly fixed gear sector 5, having a pitch diameter Di, and next to the matrix 2 on the punch plate 3 with the toothed rack 6 in constant engagement with the sector gear 5. When making the first technological conditions dividing the diameter Di of the toothed sector 5 is chosen equal to the diameter DB of the roller 4. Since Di=DB, then the roller 4 runs in the workpiece 1 without sliding, since the process is fixed and controlled by a toothed gearing. Thus, if the diameter DB of the roller 4 is chosen equal to dividing the diameter Di of the toothed sector 5, we provide the technical condition of rolling without slipping and without friction, which deform the workpiece 1 only due to the efforts pressed the I drum 4 to the workpiece 5.

The implementation of the first technical conditions can reduce the clamping due to the substantial reduction of the deformation zone.

Due to the fact that the volume of a deformable metal as prokachivanija drum 4 is continuously reduced and the stock of plasticity is sufficient for displacement of the material, ensures the minimum thickness of the edges of the semi-finished product.

The implementation of the second technological conditions (figure 3).

Installation (figure 5-9) allows the use of rollers 4 different diameter DB at constant dividing the diameter Di of the toothed sector 5.

Consider the case where the diameter DB of the roller 4 is less than the pitch diameter Di of the teeth.

In position 1 figure 3 conduct of the point On the ray with angle αreceiving point a on the circumference of the roller 4 and the point In dividing the circumference of the toothed sector 5 with diameter Di. Next, let's turn the toothed sector 5 (as if pocketim on a rack 6) together with the roller 4 on the corner α. The point In cutting circle diameter Di spot' on a rack 6, and the point a on the circumference of the roller 4 will get to the point a' on the matrix 2 (Position 2). From figure 3 it is seen that deformation of the metal workpiece 1 is due to the rolling (roll) roll 4 and the movement of the metal along the stream matrix 1 forces the friction between the material of the workpiece 1 and alcam 4. Due to this increased the ability of the metal to fill the shallow parts of the stream matrix 1. Thus, if the diameter DB of the roller 4 choosing smaller cutting diameter Di of the toothed sector 5, provide the technological condition running with friction, in which there is an additional deformation of the material of the workpiece 1 in the direction of movement of the roller 4.

The way for the second technological conditions it is expedient to use in the manufacture of precision parts from materials with high plasticity.

The third technological conditions (figure 4).

Consider the case where the diameter DB of the roller 4 more dividing the diameter Di of the teeth.

In position 1 in figure 4 have from a point On the ray with angle αreceiving point a on the circumference of the roller 4 and the point In dividing the circumference of the toothed sector 5 with diameter Di. Next, let's turn the toothed sector 5 (pocketim on a rack 6) together with the roller 4 on the corner α left. The point In dividing the circumference of the sector 5 spot In' on a rack 6, and the point a on the circumference of the roller 4 will get to the point a' on the matrix 2 (Position 2). From figure 4 it is seen that the deformation of the workpiece material 1 is due to the break (clap) drum 4, thus there are the forces of friction between the roller 4 and the workpiece 1, directed to the right, which is obstrusive the metal seal in the area of hire. Thus, if the diameter DB of the roller 4 choose more dividing the diameter Di of the toothed sector 5, provide the technological condition running with friction, in which there is an additional deformation of the material of the workpiece 1 in the direction opposite to the direction of movement of the roller 4.

The method with the implementation of the third technological conditions should be used in the manufacture of parts from blanks having low ductility, which is compensated by the additional compressive stresses (softer diagram of stress-strain state), provide friction forces when the "slip" of the drum 4.

Device for punching tested (figure 5, 6) for implementing the inventive method, respectively, contains the roller 4, the matrix 2, mounted on a punch plate 3, to accommodate the workpiece 1 and the actuator. Under the punch plate 3 in the claimed technical solution in the General case, means any bearing located under the matrix 2. This may be a removable plate, a supporting frame, a holder of a matrix, etc.

The drive has the capability of pressing rollers 4 with a force to the workpiece 1 and give it a swinging movement to the running working surface of the workpiece 1.

The roller 4 is supplied with the sector gear 5, and the punch plate 3 - gear rack 6, corresponding to ubchea sector 5. The teeth of the sector 5 are in constant engagement with the teeth of the rack 6.

In a variant implementation of the method, the actuator (figure 5-9) is made of four hydraulic cylinders 7, 8, 9, 10, frame 11, the rocker arm 12, the tank 13, the pumping station 14, valve 15, the two handles 16, 17 to move the spools of the directional control valve 15, respectively used to control the four hydraulic cylinders 7, 8, 9, 10 pairs. Two hydraulic cylinders 7, 8 are installed in the upper part of the frame 11, and two hydraulic cylinders 9, 10 in its lower part. Between the cylinders 7, 8 and cylinders 9,10 on the wall 18 of the frame 11 mounted punch plate 3 for placement of the matrix 2. The ends of the two upper cylinders 7, 8 are pivotally connected to the frame 11, and a rod pivotally connected to the arm 12 from the top side. The ends of the two lower cylinders 9, 10 pivotally connected to the frame 11, and a rod pivotally connected to the arm 12 from the bottom side. The roller 4 is installed on the lower side of the beam 12 between the cylinders 7, 9 and the hydraulic cylinders 8, 10 on the matrix 2. The release of the tank 13 (Fig.7-9) through the pumping station 14 through a pipe connected to the inlet valve 15, and the inlet to the outlet valve 15. The valve 15 through piping connected to each of the cylinders 7-10. Input/output "a" of valve 15 podtoid is replaced by pipes (hoses) to the upper fittings of the hydraulic cylinders 7, 8 (7). Input/output "b" of the valve 15 is connected by hoses to the lower fittings of the hydraulic cylinders 7, 8. Input/output "C" of valve 15 is connected to the upper fitting of the hydraulic cylinder 9 and to the lower fitting of the hydraulic cylinder 10. Input/output "d" of the valve 15 is connected to the lower fitting of the hydraulic cylinder 9 and the upper fitting of the hydraulic cylinder 10. (7-9 for ease of reading drawings toothed sector 5 and the toothed rack 6 is not shown).

In the device can be entered at least one spring 19 and two columns 20, 21 (figure 5, 6). One end of the spring 19 is connected to the sector gear 5, and the other with the rack 6. To the edges of the rack are connected the ends of the columns 20 and 21. Column 20, 21 are located in the holes in the punch plate 3 can move the toothed sector 5 together with the rack 6 up and down by means of the actuator. (7 for ease of reading drawings schematically shows one of the tees 22 for branching pipelines

Powered device (figure 5-9) as follows.

Using the left control valve spool 15 of the hydraulic cylinders 7, 8 are synchronously to move the arm 12 with the roller 4 up and down with a force of 12 tons each. Using the right control valve spool 15 of the cylinders 9, 10 can move the ends of the rocker arm 12 up and down with a force of 3 tons each asynchrony is. That is, if the hydraulic cylinder 9 moves the left end of the rocker arm 12 upward, the cylinder 10 moves the right end of the rocker arm 12 downward, and Vice versa (Fig, 9). Such movement of the rocker arm 12 is due to the occurrence of torque from the hydraulic cylinders 9, 10 and flowing oil under pressure 160 bar from the cylinder 7 cylinder 8 through the tee 22. During rotation of the rocker arm 12 as increased length of one cylinder, so as to decrease the length of the other.

The handle 16 of the left control valve spool 15 may take the position of "lifting" and "lowering" for lifting and lowering the rocker arm 12 (figure 5, 6). The handle 17 of the right control valve spool 15 has three positions: "rise", "lower" and "floating".

The handle 17 must be set to "floating" when the raising and lowering of the beam 12 (figure 5, 6).

Translate the handle 16 to the position "lower" and the roller 4 due to the operation of the hydraulic cylinders 7, 8 presses the workpiece 1 to the matrix 2. Next, when the handle 16 is in position "lowering" the handle 17 translate in position "up". While the oil from the valve 15 is supplied to the hydraulic cylinder 9 in tension, and in the hydraulic cylinder 10 is in compression (Fig). Due to this, the arm 12 with the roller 4 running clockwise and deform (roll) right side of the workpiece 1. Zatemperevodit the handle 17 in the position of "lowering" and pass around the left side of the workpiece 1 (Fig.9). The process occurs at constant pressure hydraulic cylinders 7, 8 on the workpiece 1.

After the punching of the workpiece 1 is transferred to the handle 17 in the position of "floating". Installation took a neutral position (Fig.7), and the handle 16 to the position "up", the rocker 12 and the roller 4 will occupy the top position (Fig.6). The item is retrieved, and establish a new procurement 1.

The drive is quite simple and does not require additional development of the power elements of its design. Can be used for standard hydraulic cylinders and valve (for example, P-80).

Features of the claimed device are:

a) run is made without slip;

b) when multiple liftings and lowerings of the roller 4, he was constantly in contact with the workpiece 1 by the same points.

As described above, to implement this on the roller 4 side fixed gear sector 5 (5, 6), and the punch plate 3 near the matrix 2 is the toothed rack 6. In a specific embodiment, it has two columns 20, 21 allowing it to move up and down in constant engagement with the sector gear 5, as they are connected to each other sufficiently strong spring 19.

Most successfully claimed method of forming tested and device for its implementation can be industrially applicable in the field of processing of metals pressure is.

1. Method of forming tested, including placing the workpiece in a matrix mounted on the punch plate, the rolling stock roller connected to the drive, providing the roller swinging movement when pressing roller with a force to the workpiece, characterized in that the supply roller gear sector, and punch plate - gear rack, and when the testing drum workpiece, the teeth of the sector are in constant engagement with the teeth of the rack to ensure the conditions of running.

2. The method according to claim 1, characterized in that to keep running without slipping and without friction, in which the workpiece is deformed only by the efforts of the pressing rollers to the workpiece, the diameter of the roller is chosen equal to the pitch diameter of the gear sector.

3. The method according to claim 1, characterized in that in order to ensure running with friction, in which the additional deformation of the workpiece material occurs in the direction of rotation of the drum, the diameter of the roller choosing smaller pitch diameter of the gear sector.

4. The method according to claim 1, characterized in that in order to ensure running with friction, in which the additional deformation of the workpiece material occurs in the direction opposite to the direction of rotation of the drum, the diameter of the roll choose more dividing the diameter of the gear sector.

5. Device is for forming tested, containing the drum, a matrix mounted on a punch plate for accommodating the workpiece, the actuator connected to the drum to allow the contact of the roller with a force to the workpiece and give it a swinging movement to the running working surface of the roll of the workpiece, characterized in that the roller fitted with a toothed sector, and punch plate - gear rack, the corresponding toothed sector, with the teeth of the sector is arranged to mesh with the teeth of the rack.

6. The device according to claim 5, characterized in that the diameter of the roller is selected to be dividing the diameter of the gear sector.

7. The device according to claim 5, characterized in that the diameter of the roller is selected smaller pitch diameter of the gear sector.

8. The device according to claim 5, characterized in that the diameter of the roller is selected more dividing the diameter of the gear sector.

9. The device according to claim 5, characterized in that the actuator is made of four cylinders, frame, rocker arms, hydraulic tank, pump station, valve, two handles of the control valve spool, respectively, designed to control two of the four hydraulic cylinders, two hydraulic cylinders are installed in the upper part of the frame, and two hydraulic cylinder in its lower part, and between them on the partition frame set punch PL is the the ends of the two upper cylinders pivotally connected to the frame, and rods pivotally connected to the rocker on the top side, the lower ends of the two hydraulic cylinders pivotally connected to the frame, and rods pivotally connected to the rocker on the lower side, a roller mounted on the lower side of the rocker arm between the cylinders above the matrix, the release of the hydraulic tank through the pumping station through a pipeline connected to the inlet valve, and the inlet to the outlet valve, the control valve through pipelines connected to each of the hydraulic cylinders, the first inlet/outlet valve connected to the upper fittings of the upper cylinders, a second inlet/outlet valve connected to the lower fittings of the upper cylinders, the third inlet/outlet valve connected to the upper fitting lower left hydraulic cylinder and to the lower fitting of the lower right hydraulic cylinder, the fourth input/output valve connected to the lower fitting of the lower left hydraulic cylinder and to the upper fitting of the lower right hydraulic cylinder.

10. The device according to claim 9, characterized in that it is provided with at least one spring and two columns, one end of the spring is connected to the sector gear and the other with the rack, to the edges of a toothed rack connected to once columns, and speakers are located in the holes in the punch plate can travel gear sector together with the rack up and down by using the above-mentioned drive.



 

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2 cl, 6 dwg

FIELD: metallurgy; technological processes.

SUBSTANCE: present invention relates to a scope of metal forming, particularly, to method for manufacturing watertight, corrugated metal pipes. Longitudinal corrugations are formed on a strip of metal sheet by successive passages between counterposed corrugating barrels having alternated, circumferential ridges on their outer surfaces The opposite, longitudinal lips of the strip are bent in opposite directions. Then the strip of metal sheet is coiled into a helical shape, whereby the opposite, longitudinal lips overlap laterally. Before the opposite, longitudinal lips are crimped together between counterposed crimping rollers, a rubber gasket is fitted to one of the opposite longitudinal lips. Gasket has a bent profile capable of embracing the longitudinal lip at least partially. Whereby the material of the gasket, by effect of the crimping pressure, is reduced in thickness and deformed plastically at least in certain areas of the longitudinal lips which are biased against each other by the crimping action.

EFFECT: use of a rubber gasket with bent profile results in increased watertightness of the pipe.

10 cl, 11 dwg

FIELD: metal processing.

SUBSTANCE: invention relates to metal forming and may be used for production of helical curvilinear air duct. Device includes first supply shafts for metal sheet pulling through, copying mechanism, made with possibility of pulled metal sheet cutting from first supply shafts in longitudinal direction into three strips along straight line or wavy line by preset path, wherein two side strips, having by one straight edge are rolled into rolls for subsequent processing, second supply shafts for pulling through of third, central, strip into edge forming device with formation of connecting locks on side edges with subsequent twisting of strip into spiral shape. Devices are equipped with seaming rollers for locking connections compacting, which have possibility to move across metal strip travel and cutoff device for separation of produced air duct from metal strip. Device versions allow to produce curvilinear air duct from precut by specified path strip.

EFFECT: expanding performances of devices used for producing spiral curvilinear air duct by described above method.

4 cl, 14 dwg

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