Automatic shearing machine applying servo control system

Abstract

The automatic shearing machine comprises a feeding mechanism, a shearing machine body and an electric control device, the feeding mechanism is arranged on the front side of the shearing machine body and used for conveying materials to the shearing machine body, and the feeding mechanism has the conveying and length measuring functions; the shearing machine comprises a cutter table, a cutter and a cutter control assembly, the cutter control assembly comprises a shearing motor, a transmission assembly connected with the shearing motor and a guide assembly, the transmission assembly comprises a connecting rod and an actuating rod, and a motor shaft of the shearing motor and the actuating rod are connected with the ends of the two sides of the connecting rod respectively. And the electric control device is connected with the feeding mechanism and the shearing machine and is used for controlling the working state of each component connected with the electric control device, so that the automatic control of the automatic shearing machine applying the servo control system is realized. The automatic shearing machine also has the advantages of high running speed, high positioning precision, high cost performance and the like.

Description

Technical Field

[0001] The invention relates to the technical field of automatic shearing machines, and in particular to an automatic shearing machine using a servo control system. Background Art

[0002] In the process of modern industrial production, many enterprises are looking forward to automatic shearing machines with high positioning accuracy and high running speed, especially in some special occasions, such automatic shearing machines have played a lot of roles. At present, domestic automatic shearing machines have low production efficiency, poor dynamic performance and low precision, which can no longer meet the needs of industrial development in today's society. It is urgent to invent a high-performance, high-precision and high-efficiency automatic shearing machine.

[0003] Automatic shearing machines with high positioning accuracy and fast running speed have a wide range of application value. Take the steel industry as an example. Both rolling mills and steel distribution units are in great need of fast and high-precision automatic shearing equipment. Plates of different thicknesses and widths need to be efficiently cut into uniform sizes and sent directly to the production line without further processing. The performance of automatic shearing equipment is measured by the degree of automation and the precision of the cut-to-length, which will directly affect the production efficiency and product quality of the enterprise. The plate shearing part is the key to the whole set of equipment.

[0004] For high-precision and high-dynamic response control systems, servo control drives are generally considered. This drive is part of the intelligent control system. It can achieve mobile, flexible and efficient drive control, and its performance far exceeds that of similar frequency conversion systems. It has been widely used around the world and can ensure that the production system has a high dynamic response during operation. Summary of the invention

[0005] The object of the present invention is to provide an automatic shearing machine using a servo control system to solve one or more of the above-mentioned problems in the prior art.

[0006] The present invention provides an automatic shearing machine using a servo control system, comprising a feeding mechanism, a shearing machine and an electric control device. The feeding mechanism is arranged at the front side of the shearing machine, and is used to feed materials toward the shearing machine. The feeding mechanism has the functions of feeding and measuring the length; The shearing machine comprises a knife platform, a cutter and a cutter control assembly, wherein the cutter control assembly comprises a shearing motor, a transmission assembly connected to the shearing motor, and a guide assembly, wherein the transmission assembly comprises a connecting rod and an action rod, wherein the motor shaft of the shearing motor and the action rod are respectively connected at both ends of the connecting rod; the guide assembly comprises a knife holder and a guide rod, wherein the bottom of the knife holder is connected to the cutter, a transversely arranged slot is arranged on the knife holder, and the action rod is arranged corresponding to the slot; guide holes are arranged on the knife holder on both sides of the slot, and the guide rod passes through the guide holes; The electric control device is connected with the feeding mechanism and the shearing machine, and is used for controlling the working state of each component connected with the electric control device.

[0007] In some embodiments, The automatic shearing machine using the servo control system comprises an unwinding machine, a leveling mechanism, a conveying device and a receiving device, wherein the unwinding machine, the leveling mechanism, the feeding mechanism, the shearing machine, the conveying device and the receiving device are sequentially arranged along the conveying direction of the material; The electric control device comprises a proximity switch, a lower computer and a frequency converter.

[0008] In some embodiments, The leveling mechanism comprises two roller groups for leveling, namely a first roller group and a second roller group; The lower computer is a PLC or a single-chip microcomputer; The proximity switch is an embedded proximity switch, which is arranged on one side of the cutter in the shearing machine and is used to record the conveying length of the material.

[0009] In some embodiments, the feeding mechanism includes a group of rollers with a length measuring function, and the group of rollers includes an upper pinch roller and a lower pinch roller. The clamping force of the upper pinch roller and the lower pinch roller is set corresponding to the material, so that the material rolls without sliding in the upper pinch roller and the lower pinch roller, thereby completing feeding and length measurement.

[0010] In some embodiments, the shearing motor is a variable frequency reduction motor.

[0011] In some embodiments, an automatic shearing machine using a servo control system adopts the positioning shearing principle for shearing. The specific operation process of the positioning shearing principle is: when the cutting blade is separated, the electronic control device is started, and the automatic shearing machine with the servo control system directly calculates the operating speed curve with preset basic parameters, drives the servo motor in the feeding mechanism to feed, convey and measure the length. When the measured length reaches the target length, the servo motor stops, the material stops moving, the cutting blade moves downward, the material is cut off, and then the material is conveyed by the conveying device to the receiving device, and the cycle is repeated in sequence to automatically cut the material into finished products of the target length.

[0012] In some embodiments, the automatic shearing machine using the servo control system further includes a counting unit, which is connected to the electronic control device and is used to record the actual number of pieces of the currently sheared material.

[0013] In some embodiments, The counting unit can also be used to calculate the standard value of the number of pieces of material currently sheared, and compare the standard value with the actual number of pieces, and the stroke matching signal, the standard value = the conveying length of the material recorded by the proximity switch / the target length; The application servo control system also includes an alarm module, which is connected to the electronic control device and is used to send an alarm signal according to the matching signal.

[0014] In some implementations, the counting unit includes a CC-LINK module, and the CC-LINK module is connected to the electronic control device.

[0015] In some embodiments, the automatic shearing machine using a servo control system also includes an information input and output module, which is connected to the electronic control device, and is used to output relevant parameters and input basic parameters. The relevant parameters include basic parameters, the current speed of the servo motor and the shearing motor, the actual number of blocks of the current shearing material, and the conveying length of the current material. The basic parameters include target length, pre-cut quantity, acceleration and deceleration rates of the servo motor and the shearing motor, and the maximum speed of the servo motor and the shearing motor.

[0016] The advantages of the automatic shearing machine using a servo control system described in the present invention are: Fast running speed, cutting speed up to 90 pieces / minute; High positioning accuracy, the error of each piece can be controlled within ±0.15mm; High cost performance and extremely high practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A flowchart of an automatic shearing machine using a servo control system in some embodiments of the present invention; Figure 2 Schematic diagram of the structure of the cutter control assembly in some other embodiments of the present invention. DETAILED DESCRIPTION

[0018] Combination Figure 1 As shown in the content, this embodiment describes an automatic shearing machine using a servo control system, including an uncoiler 1 arranged according to the conveying direction of the material to be sheared, a leveling mechanism, a feeding mechanism with a length detection function, a shearing machine, a conveying device 5, a receiving device 6 and an electronic control device. The material to be sheared passes through the uncoiler 1 and the leveling mechanism, and then passes through the feeding mechanism and the shearing machine to be sheared into a finished product according to a given shearing length requirement. Finally, the conveying device 5 sends the finished product to the receiving device for packaging.

[0019] The automatic shearing machine using the servo control system can be used to shear softer materials such as cardboard, floor leather, wallpaper, etc. It can also be directly applied to industrial production. By changing the material of the cutter in the shearing machine and the power of the shearing motor, the requirements for shearing materials of different materials can be achieved to meet production needs.

[0020] The electronic control device is used to control the working state of the automatic shearing machine using the servo control system. The electronic control device includes a proximity switch, a lower computer (PLC or single-chip microcomputer), a frequency converter, etc. The program executed by the lower computer includes a fixed-length control program, the fixed-length control program includes a servo positioning control program, and the proximity switch can be an embedded proximity switch. The running speed of the automatic shearing machine using the servo control system can be controlled by the frequency converter, and the programmable controller controls the servo motor and the shearing motor to cooperate efficiently.

[0021] The uncoiler 1 can directly adopt an existing uncoiler. The conveying device 5 and the receiving device 6 can also directly adopt existing devices and are therefore not described in detail here.

[0022] The leveling mechanism can directly use the existing leveling device. Since the pressure requirement of the leveling mechanism is slightly lower than the roller body 301 in the subsequent feeding mechanism, the pressure of the leveling mechanism can be manually adjusted. Figure 1 As shown in the content, the leveling mechanism may be: the leveling mechanism includes two roller groups for leveling, namely a first roller group 201 and a second roller group 202.

[0023] The feeding mechanism is used for feeding and length measurement. The structure of the feeding mechanism can be: the feeding mechanism can be a pinching mechanism, the pinching mechanism is controlled by a servo motor (the servo motor can be an AC servo motor), the servo motor is controlled by a servo positioning control program, the pinching mechanism includes a group of rollers 301 with a length measurement function, the group of rollers 301 includes an upper pinching roller and a lower pinching roller, the clamping force of the upper pinching roller and the lower pinching roller is adjusted to just press the material, so that the material rolls in the upper pinching roller and the lower pinching roller at a set speed without sliding, completing feeding and length measurement.

[0024] The structure of the shearing machine can be: combined Figure 2The shearing machine includes a cutter table 401, a cutter 402 and a cutter control assembly. The cutter control assembly includes a shearing motor (the shearing motor can be a variable frequency reduction motor), a transmission assembly connected to the shearing motor, and a guide assembly. The transmission assembly includes a connecting rod 442 and an action rod 441. The motor shaft 443 of the shearing motor and the action rod 441 are respectively connected to the two side ends of the connecting rod 442; the guide assembly includes a knife holder 403 and a guide rod (generally, the guide rod is vertically arranged to guide the knife holder 403 to move up and down in the vertical direction along the guide rod). The bottom of the rack 403 is connected to the cutter 402. The rack 403 is provided with a transversely arranged slot 433, which can penetrate the rack 403. The action rod 441 is arranged corresponding to the slot 433, and the action rod 441 can slide along the slot 433. The rack 403 on both sides of the slot 433 is provided with guide holes 432, and the guide rods pass through the guide holes 432. Through the arrangement of the guide rods and the guide holes 432, the rack 403 slides up and down in the vertical direction along the guide rods during operation (if there is a requirement for the incision slope, the cutting degree of the cutter blade and / or the slope of the guide rod can be adjusted as needed). In some specific implementations, when the slot 433 penetrates the rack 403, the end of the action rod 441 that is not connected to the connecting rod 442 passes through the slot 433. The motor shaft 443 of the shearing motor is rotated to drive the connecting rod 442 to rotate, and the curvilinear motion of the connecting rod 442 is converted into the linear motion of the action rod 441. Because the axial direction of the motor shaft 443 of the shearing motor is fixed, the knife holder 403 will reciprocate on a vertical straight line. The guide rod is used as the guide mechanism of the knife holder 403 to ensure that the knife holder 403 can reciprocate along the guide rod, and the stroke of the cutter is twice the length of the connecting rod 442 (the length of the connecting rod 442 is the distance from the connection point of the motor shaft 443 of the shearing motor on the connecting rod 442 to the connection point of the action rod 441 on the connecting rod 442). Through the structural design of the cutter control component, the space occupied by the cutter control component in the moving direction of the knife holder is effectively controlled.

[0025] The proximity switch is installed on one side of the cutter 402. The proximity switch can be installed on the knife holder 403 or at other positions on one side of the cutter 402. The conveying length of the material is recorded by the proximity switch. The setting of the proximity switch can effectively reduce the interference of the frequency converter and improve the working stability of the automatic shearing machine using the servo control system.

[0026] The automatic shearing machine using the servo control system may also be provided with a counting unit, which is connected to the electronic control device. The counting unit includes a CC-LINK module, which is connected to the electronic control device. The counting unit is used to record the actual number of blocks of the currently sheared material, and calculate the standard value of the number of blocks of the currently sheared material using the conveying length of the material recorded by the proximity switch and the target length (standard value = conveying length of the material recorded by the proximity switch / target length), and compare the actual number of blocks with the standard value to form a corresponding matching signal and send it to the electronic control device. The servo control system may also include an alarm module, which is connected to the electronic control device and linked to the counting unit to trigger an alarm signal according to the matching signal. When the actual number of blocks is not equal to the standard value, the counting unit sends a mismatch signal to the electronic control device, and then controls the alarm module to send an alarm signal (light alarm signal and / or sound alarm signal) so that the user can correct the parameters in time.

[0027] The automatic shearing machine using the servo control system may also include an information input and output module, which is connected to the electronic control device. The information input and output module can be used to output relevant parameters and input basic parameters. The relevant parameters include basic parameters, the current speed of the servo motor and the shearing motor, the actual number of pieces of the current shearing material, the conveying length of the current material, etc. The basic parameters include the target length (the length of the required shearing material), the number of pre-shears, the acceleration and deceleration rates of the servo motor and the shearing motor, the maximum speed of the servo motor and the shearing motor, etc. The information input and output module described herein can be a touch screen or other intelligent user terminal, and the intelligent user terminal can be a mobile phone, a notebook, etc. The information input and output module can both display and input and modify relevant preset parameters. When the information input and output module is a touch screen, the information input and output module and the electronic control device can be connected by wire; when the information input and output module is other intelligent user terminals, the information input and output module and the electronic control device can be connected wirelessly through existing methods such as Bluetooth.

[0028] The above-mentioned servo control system automatic shearing machine adopts the positioning shearing principle for shearing, and the positioning shearing principle is to shear at the moment when the material stops. The specific operation process of the positioning shearing principle is: when the cutting edge of the cutter is separated, the electric device is started, and the feeding length is controlled by the lower computer and the servo positioning control program. After the trigger starts, the servo control system automatic shearing machine directly applies the preset basic parameters, calculates the operating speed curve, and drives the servo motor in the feeding mechanism to feed the material. During the feeding process, the roller body 301 conveys and measures the length of the conveyed material. When the measured length reaches the target length, the servo motor stops, the material stops moving, the cutting edge of the cutter moves downward, and the material is cut off. Then the material is conveyed by the conveying device 5 to the receiving device 6. Cycle in sequence, and automatically cut the material into finished products of the target length.

[0029] The above undisclosed matters can all be implemented using existing technologies, and therefore will not be elaborated here.

[0030] For ordinary technicians, several similar variations and improvements can be made without departing from the creative concept of the present invention, and these should also be regarded as the protection scope of the present invention.

Claims

1. An automatic shearing machine using a servo control system, characterized in that: Including feeding mechanism, shearing machine and electronic control device, The feeding mechanism is arranged at the front side of the shearing machine, and is used to feed materials toward the shearing machine. The feeding mechanism has the functions of feeding and measuring the length; The shearing machine comprises a knife platform, a cutter and a cutter control assembly, wherein the cutter control assembly comprises a shearing motor, a transmission assembly connected to the shearing motor, and a guide assembly, wherein the transmission assembly comprises a connecting rod and an action rod, wherein the motor shaft of the shearing motor and the action rod are respectively connected at both ends of the connecting rod; the guide assembly comprises a knife holder and a guide rod, wherein the bottom of the knife holder is connected to the cutter, a transversely arranged slot is arranged on the knife holder, and the action rod is arranged corresponding to the slot; guide holes are arranged on the knife holder on both sides of the slot, and the guide rod passes through the guide holes; The electric control device is connected with the feeding mechanism and the shearing machine, and is used for controlling the working state of each component connected with the electric control device.

2. The automatic shearing machine using a servo control system according to claim 1, wherein: The automatic shearing machine using the servo control system comprises an unwinding machine, a leveling mechanism, a conveying device and a receiving device, wherein the unwinding machine, the leveling mechanism, the feeding mechanism, the shearing machine, the conveying device and the receiving device are sequentially arranged along the conveying direction of the material; The electric control device comprises a proximity switch, a lower computer and a frequency converter.

3. The automatic shearing machine using a servo control system according to claim 2, wherein: The leveling mechanism comprises two roller groups for leveling, namely a first roller group and a second roller group; The lower computer is a PLC or a single-chip microcomputer; The proximity switch is an embedded proximity switch, which is arranged on one side of the cutter in the shearing machine and is used to record the conveying length of the material.

4. The automatic shearing machine using a servo control system according to claim 1 or 2, wherein: The feeding mechanism includes a group of rollers with a length measuring function, which includes an upper pinch roller and a lower pinch roller. The clamping force of the upper pinch roller and the lower pinch roller is set corresponding to the material, so that the material rolls without sliding in the upper pinch roller and the lower pinch roller, thereby completing feeding and length measurement.

5. The automatic shearing machine using a servo control system according to claim 4, wherein: The shearing motor is a variable frequency reduction motor.

6. The automatic shearing machine using a servo control system according to claim 4, wherein: The automatic shearing machine using the servo control system adopts the positioning shearing principle for shearing. The specific operation process of the positioning shearing principle is: when the cutting edge of the cutter is separated, the electronic control device is started, and the automatic shearing machine of the servo control system directly calculates the operating speed curve with the preset basic parameters, drives the servo motor in the feeding mechanism to feed, convey and measure the length. When the measured length reaches the target length, the servo motor stops, the material stops moving, the cutting edge of the cutter moves downward, the material is cut off, and then the material is conveyed by the conveying device to the receiving device, and the cycle is repeated in sequence to automatically cut the material into finished products of the target length.

7. The automatic shearing machine using a servo control system according to claim 3, wherein: The automatic shearing machine using the servo control system also includes a counting unit, which is connected to the electronic control device and is used to record the actual number of pieces of the currently sheared material.

8. The automatic shearing machine using a servo control system according to claim 7, wherein: The counting unit can also be used to calculate the standard value of the number of pieces of material currently sheared, and compare the standard value with the actual number of pieces, and the stroke matching signal, the standard value = the conveying length of the material recorded by the proximity switch / the target length; The application servo control system also includes an alarm module, which is connected to the electronic control device and is used to send an alarm signal according to the matching signal.

9. The automatic shearing machine using a servo control system according to claim 7, wherein: The counting unit comprises a CC-LINK module, and the CC-LINK module is connected to the electric control device.

10. The automatic shearing machine using a servo control system according to claim 8, wherein: The automatic shearing machine using a servo control system also includes an information input and output module, which is connected to the electronic control device. The information input and output module is used to output relevant parameters and input basic parameters. The relevant parameters include basic parameters, the current speed of the servo motor and the shearing motor, the actual number of blocks of the current shearing material, and the conveying length of the current material. The basic parameters include target length, the number of pre-cuts, the acceleration and deceleration rates of the servo motor and the shearing motor, and the maximum speed of the servo motor and the shearing motor.

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