Device for controlling and measuring the flatness of rolled

 

(57) Abstract:

The device relates to sheet rolling production and can be used as a device to control and modify the characteristics of the actual flatness of the car, namely the amplitude and period waviness of the strip. Device for controlling and measuring the flatness of the car contains a computing and storage unit, the transmitter amplitude measuring transducer of the period, a rod for measuring the amplitude of the waviness of the strip, the rack, which is mounted on the chassis for movement along the measuring line. 1 C.p. f-crystals, 7 Il.

The invention relates to sheet rolling production and can be used as a device for monitoring and measuring the characteristics of the actual flatness of the car, namely the amplitude and period waviness of the strip.

A well-known measure of the flatness of the strips for the measurement of the stress distribution across the width of the strip during rolling [1]

However, these devices measure the actual variation of flatness is almost impossible as most of the existing methods linking the amplitude of waviness with the plot given the apparent flatness, implementing the measuring method of removal of the strip surface from a given plane [1] When using this device because of the indirect determination of the form of waviness (it is assumed that the ripple is sinusoidal, that is not always true [2] cannot be measured values of monitored at the outlet of mill parameters flatness issue for the actual finished steel. In addition, after cold rolling is usually strip steel is subjected to heat treatment, which are not affected variation of flatness of the car.

According to GOST 26877-91, GOST 19903-90, GOST 19904-90 deviation of the surface of the strip steel from flatness is measured with a template or other measuring instrument. Usually for this purpose use an ordinary ruler. The disadvantage of using data measuring instruments is: low precision measurement of flatness, low productivity of the employee performing the measurement, which leads to a lack of quality control sheet steel because of the low control sample from the batch. In addition, all the operations starting from the measurements and to fix the value of the parameters, are performed manually, which is the result of the proposed device is a device for controlling and measuring the flatness of the rolled the main components of which are the measuring stick, a rod for measuring the amplitude of waviness, fixed in the grooves of the measuring line can move in the vertical plane and articulated through sesterhenn rack and pinion gear with the input axis of the measuring transducer, which is fixed on the upper part of the measuring range to the lower part of which is attached resistor element made of thin wire wound on a frame in the form of a plate of insulating material, and two sets of contacts with the ability to snap to an element of the resistor in contact with the strip, which is connected in a common circuit between itself and the meter resistance, the output of which is connected to the first input of the computing unit, a second input connected to the output of the transducer; the output of the computing unit is connected with a digital display for visual evaluation of strip flatness and vychislitelno-storage unit, the output of which is connected with a printing device [3]

The main disadvantage of this device is rapid wear of the contacts resistive sensor when the friction with strip steel, contamination and oxidation during exploitational reasons. In addition, contacts resistive sensor are complex and expensive elements of the device, as they usually have silver or gold plating to improve contact with the element resistance and increased resistance to oxidation.

Device for controlling and measuring the flatness of car, consisting of a measuring line, a computing unit, a digital display for visual evaluation of the strip flatness and computer-storage unit, the measuring transducer of the amplitudes of the rod to measure the amplitude of the waviness, further comprises a rack fixed to the measuring line and articulated through sesterhenn rack and pinion gear with the input axis of the measuring transducer of the period, fixed on the chassis for movement along the measuring line, attached to the measuring transducer amplitude of the input axis is articulated through sesterhenn-the rack and pinion rod for measuring amplitude, secured in the slots of the chassis with the possibility of moving in the vertical direction. The output transducer period connected to the first input of the computing unit. The measuring preobrazovanij at the ends of the toothed rack, connected with the third input of the computing unit. The yield of the latter is connected with a digital display for visual evaluation of the strip flatness and computer-storage unit, the output of which is connected with the printing device.

Comparative analysis of the prototype shows that the inventive device is characterized by the presence of new nodes and blocks, namely, chassis, racks, transducer period waviness of the strip, the limit switches.

In Fig. 1 shows the General scheme of the proposed device.

Device for controlling and measuring the flatness of the car contains the measuring line 1 is fixed on the upper part of the rack 2, kinematically connected sesterhenn-rack and pinion with the input axis of the measuring transducer of period 3, which is fixed on the chassis 4, mounted in the slots of the measuring line 1 can be moved in a horizontal direction along the measuring line 1, and attached the transmitter amplitude 5, the input axis of which is kinematically connected with the shaft 6, mounted in the slots of the chassis 4 can move in the vertical direction. 3 is connected in a common circuit with a first input of the computing unit 8. The output transducer amplitude 5 is connected to a second input of the computing unit 8. The yield of the latter is connected to a digital display 9 for the visual evaluation of measured values of parameters of the strip flatness and computer-storage device (DDT) 10 for accumulation and machine information processing. Computing-storage device 10 equipped with a printing device 11 for the issuance of processed information in the form of protocols.

Measuring range with raspolozhennymi the nodes and elements shown in Fig. 2, which shows a General view of the measuring line, front view; Fig. 3, a top view; Fig. 4 is the same, ventral view; Fig. 5 is the same, the node I of Fig. 6 is the same, the node II.

The rod 6 for measuring the amplitude of the waviness of the strip, mounted in the slots of the chassis 4 can move in the vertical plane, kinematically connected sesterhenn-rack and pinion (Fig. 6) with the input axis 12 of the measuring transducer amplitude 5. Measuring transducer amplitude 5 mounted on the chassis 4, attached to the measuring transducer 3 can move in the horizontal plane along the measuring line 1, the input axis 13 to which isolates amplitude 5, the measuring period 3 and the remote transmission of information is focused on instruments manufactured by the industry [4]

In Fig. 7 shows a block diagram of a computing unit selection maximum amplitude and period waviness. The outputs of the transducers of the period and amplitude are connected to the corresponding inputs of the converters 1 and 2 input signals in code.

The output of the inverter 2 is connected to the first input of counter horizontal movement of the Converter 3, the output of which is connected to the first input of the divider 10; the output of the Converter 1 is connected to the first input of the first block comparison 7, the first input register of the maximum current code of dimension 4 and the input of the second block comparison 6, the output of which is connected to the first input of the trigger hosting account 5, the output of which is connected to a second input of the counter horizontal movement 3 and the fourth input of the register recording the maximum code current dimension 4, the first output of which is connected to a second input of the first unit of comparison 7, the output of which is connected with the second input of the register recording the maximum code current dimension 4, the second output of which is connected to the first input of the third Ihad which is connected to a second input of the third block comparison, 8, the output of which is connected with the second input of the second register of the maximum code multiple dimensions 9, the second output of which is connected with the second input of the divider 10; the output of the limit switches is connected to a second input of the trigger permits account 5 and the third input of the register recording the maximum code 4; the output of the meter horizontal movement 3, the second output of the register recording the maximum code current dimension 4, the output of divider 10 is connected with the corresponding inputs of DDT and digital signage registration period (T), amplitude (a) of the waviness of the strip, relationships And/So

The technical result of the invention is to improve reliability of the device during its operation, improving the accuracy and quality control of the flatness of the car, reducing the cost of the device during its manufacture

Device for controlling and measuring the flatness of the car works as follows.

When measuring the parameters of flatness rental measuring line 1 (Fig. 1) is lowered to the surface of the strip 14 so that it is in contact with the strip at two points of the bend of the strip 14 on the table 15. The chassis 4 is allocated horizontally to the left (right) position and digits ESAs on line in the vertical plane and touching his bottom surface of the strip describes the trajectory of the waviness of the strip surface. The input axis of the measuring transducer amplitude 12 through sesterhenn-and-pinion is rotated by an angle corresponding to the position of the rod 6, and the input axis of the measuring transducer of the period 13 through serenno-rack and pinion makes a number of turns proportional to the horizontal movement of the chassis relative to the toothed rack 2, fixed measuring range 1. Transducers amplitude and period waviness convert the translational movement of the rod 6 and the chassis 4 in the signals, convenient for remote transmission of information, and through which the connector 16 are received at inputs 1 and 2, the computing unit 8.

For example, according to Fig. 1 chassis before starting the measurement is in the left (right) position and the closed limit switch 7, the output of which is connected to the third input of the computing unit 8. Closed position limit switch, according to the block diagram (Fig. 7) corresponds to the zero value of the signal in the register maximum current code of dimension 4 and causes the switch trigger 5 in the zero state (if the trigger before that was in a single state). When olamsa account code proportional to the magnitude of the measured amplitude. While the stock Converter amplitude, touching his bottom strip is in a home position.

When moving the chassis for guiding the measuring line from left to right (right to left) limit switch opens, allowing the switch trigger 5 in one state when the signal at its first input, and the rod moving in a vertical plane, describes its bottom shape of the strip. The moving rod measured by the measuring transducer amplitude, the input of which is kinematically connected with the rod through sesterhenn-the rack and pinion. Output transducer amplitude to the second input of the computing unit, which is the input of the Converter 1 input signal amplitude in the code signal whose value is proportional to the measured vertical displacement of the rod. The converted signal on the magnitude of movement of the rod from the output of the Converter 1 is supplied at the first input of the first unit of comparison 7, which compares with the previous maximum signal value of the current measurement; at the first input of the first signal recording maximum current code the maximum signal value of the current measurement of the amplitude of the waviness of the strip is delivered from the first output of the first register of the maximum code of the current measurement 4. If the magnitude of the current signal amplitude greater than the previous one, with the first Comparer 7 is fed to the second input of the first register of the maximum code of the current measurement 4 the enable signal write code in the register 4 instead. Otherwise, the output unit 7 is not available and a new entry in the register 4 is not happening.

Move the chassis along the line is measured by a measuring transducer of the period, whose input is periodically connected with the rack through sesterhenn-the rack and pinion. From the output transducer of the period to the first input of the computing unit which is input to the Converter 2 input signal horizontal movement in the code serves discrete signals, the magnitude of which is proportional to the measured displacement of the chassis. The converted signals on the magnitude of movement of the chassis comes from the output of the inverter 2 to the first input of the counter horizontal movement 3, which are added when the trigger 5 is in a single state.

When you move the chassis from left to right (right to left) and the achievement of the rod minimum period waviness of the strip, i.e. the first (left to right) contact point Izmeritel the s and when the first input of the second Comparer 6 causes the appearance of a signal at its output. The output signal from the second unit of comparison 6 is fed to the first input of the trigger 5, causing him to switch to one state and thereby leading to the appearance of the signal at the output of the trigger 5, which is fed to the second input of the counter horizontal movement 3 and allows the account value period from this moment.

When the rod maximum period waviness band signal maximum code value of the amplitude is written in the first register records the maximum current code of dimension 4 and remains there for the end of the current meter.

When the position of the rod when moving the chassis by measuring the line reaches the second minimum period waviness of the strip, i.e., the second contact point of the measuring line with the strip, the current signal amplitude at the output of the Converter 1 again take the value zero and, when the first input of the second Comparer 6 causes a signal at its output which is fed to the first input of the trigger 5, causing him to switch to the zero state and leads to the appearance of a signal at its output. With the release of the latest signal output trigger 5 is supplied as a third input of the first register of the maximum current code of dimension 4, allowing the issuance code maximum amplitude of the current measurement on his way out. With the release of the latest signal of maximum amplitude of the current measurement is fed to the first input of the third block comparison 8 and to the first input of the second register of the maximum code multiple dimensions 9. The maximum signal value of the previous measurement of the amplitude of the waviness of the strip is delivered from the first output of the second register of the maximum code multiple dimensions 4. If the signal amplitude of the current measurement value of the maximum amplitude of the waviness of the strip, fixed a few previous measurements, the output of the third block comparison 8 is applied to a second input of the second register of the maximum code multiple dimensions 9 signal recording resolution code in the register instead of the previous 9. Otherwise, the output unit 8 is not available and a new entry in the register 9 is not happening. Thus, in the second case, the maximum capture code multiple dimensions 9 after the end of the current measurement remains the code value of the maximum amplitude of the waviness of the strip, fixed a few measurements, which from the output of the register 9 receives the d values of the period, which appears at the output of the horizontal counter move 3 and is supplied to the output T of the computing unit. The output of divider 10 is the output of the A/T computer unit 7, which, together with the outputs a and T arrives at the inputs of a digital display and external storage devices.

The use of the proposed device allows for a comparison with the existing one to increase the reliability of the device during its operation due to the rejection of the use of unreliable elements and changes in the design of devices to improve the accuracy and quality control the flatness of rolled through the use of more accurate control and measurement nodes, to reduce the cost of the device during its manufacture due to the use of less expensive items.

Sources of information

1. Sergeev A. C. Trends to improve monitoring and control of strip flatness abroad: obsorn. inform. /in-t "dermatopharmacy", M. 1987, 41 S.

2. Kuznetsov, L. A. Blumin S. L. Gods A. I. // Izvestiya vuzov "Ferrous metallurgy", 1989, No. 8, S. 62 67.

USSR author's certificate N 1754250, 21 In 37/00, 1992 (prototype).

Transfiguration B. N. Thermal measurements and instruments. M Energy, 1978, 704 S.

1. The device pin is Ino-storage unit, connected the outputs to the circuit device, the first measuring transducer connected to the first input of the computing unit, stock, digital signage, United together with a computing and storage unit with outputs of the computing unit, characterized in that it is provided with a chassis, a second measuring transducer, two limit switches, gear rack mounted on the measuring line and connected through sesterhenn rack and pinion gear with the input axis of the second measuring transducer, mounted on the chassis, attached to the first measuring transducer, the input axis of which is connected through sesterhenn-the rack and pinion rod, installed in the slots of the chassis with the possibility of moving in the vertical direction, and the chassis is installed in the slots of the measuring range can be moved in a horizontal direction along the measuring line, the output of the second transducer is connected to a second input of the computing unit, the third input of the computing unit is connected to the two outputs of the limit switches mounted on the ends of the rack.

2. The device under item 1, characterized in that vicis is a, the trigger divider, and the output of the first input signal Converter in the code connected to the first input of the first counter, the output of the second input signal Converter in the code connected to the first input of the first unit of comparison, the first input of the first register and the input of the second block of comparison, the output of which is connected to the first input trigger output connected to a second input of the counter and to the fourth input of the first register, the first output of which is connected to a second input of the first unit of comparison, the output of which is connected to a second input of the first register, the second output of which is connected to the first input of the third block comparison and the first input of the second register, the first output of which is the first exit unit and connected to the first input of the divider, a second input connected to the output of the counter, the output of the third unit of comparison is connected to a second input of the second register, the second output of which is connected to a second input of the third block of comparison, the input of the computing unit, coupled to the outputs of the limit switches is connected to a second input of the trigger and the third input of the first register, the outputs of the counter and divider are respectively the second and third outputs of the computing unit.

 

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