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CN-122007489-A - Scrap tightening material belt cutting machine for sheet metal stamping and cutting control method

CN122007489ACN 122007489 ACN122007489 ACN 122007489ACN-122007489-A

Abstract

The invention discloses a scrap tightening material belt cutting machine for sheet metal stamping and a cutting control method, and relates to the technical field of sheet metal stamping, wherein the scrap tightening material belt cutting machine comprises a bracket, a traction tightening assembly, an anti-dislocation detection assembly, a fixed-length cutting assembly, a scrap collecting assembly, a height adjusting assembly and a control unit; the traction tightening assembly adopts a torque motor to drive a roller, applies limited traction force to a waste section of the material belt to keep the tension, limits the traction force to be smaller than the pressing force threshold of the feeding machine, detects the positioning hole/position state of the material belt through an optical fiber sensor and outputs an interlocking signal, the fixed-length cutting assembly cuts the waste section in a fixed length mode in the traction process, the cut waste is collected in a concentrated mode through a conveying canal and a waste hopper, the height adjusting assembly is used for enabling the running plane of the waste section to be kept level with an outlet of a die, the cutting machine is compact in structure and integrally installed on a stamping machine tool to achieve high safety, traction control difficulty is reduced, and automation level of waste treatment is improved.

Inventors

  • MO JUN
  • KE ZENGSONG

Assignees

  • 广东誉品实业有限公司

Dates

Publication Date
20260512
Application Date
20260205

Claims (10)

  1. 1. A scrap tightening material belt cutting machine for sheet metal stamping is characterized in that, Comprises a bracket which is arranged on a frame of a stamping machine tool and is adjacent to the tail end of a stamping die; The traction tightening assembly is arranged on the bracket and comprises an upper roller, a lower roller and a torque motor, the torque motor drives the upper roller and/or the lower roller to rotate so as to apply traction force to a waste section of the material belt to keep the material belt tight, and the output torque of the torque motor is adjustable and is used for limiting the traction force to be smaller than the pressing force threshold value of the feeder of the punching machine tool; the dislocation preventing detection assembly comprises a positioning plate and an optical fiber sensor arranged at the positioning plate, and is used for detecting the state of a positioning hole/position of the material belt and outputting an interlocking signal; The fixed-length cutting assembly is arranged at the downstream of the traction tightening assembly and is used for cutting the waste section of the material belt according to a set length in the traction tightening process; the waste collection assembly comprises a conveying canal and a waste funnel which are arranged corresponding to the fixed-length cutting assembly and are used for receiving and collecting the cut waste; The height adjusting assembly is used for adjusting the height position of the traction tightening assembly and/or the fixed-length cutting assembly relative to the outlet of the stamping die so as to enable the waste section running plane of the material belt to be kept flush with the outlet of the stamping die; and the control unit is electrically connected with the torque motor, the optical fiber sensor and the fixed-length cutting assembly and is used for executing cooperative control of traction tightening and fixed-length cutting according to the interlocking signal, the pressing force threshold value and the parameter of the set length.
  2. 2. The scrap tightening strap cutter of claim 1 wherein, The traction tightening assembly further comprises a pressing force adjusting mechanism, and the pressing force adjusting mechanism is used for adjusting the clamping pressure of the upper roller and the lower roller on the waste section of the material belt; the pressing force adjusting mechanism comprises an adjusting unit and a locking unit, wherein the adjusting unit is of a screw rod adjusting structure and/or an eccentric shaft adjusting structure so as to change the rolling gap or the relative position of the upper roller and the lower roller, and the locking unit is used for locking the rolling gap or the relative position after adjusting the upper roller and the lower roller.
  3. 3. The scrap tightening strap cutter of claim 2 wherein, The pressing force adjusting mechanism further comprises an elastic pre-tightening piece and a limiting piece, wherein the elastic pre-tightening piece is a spring or an elastic body and is used for applying pre-pressing force to the upper roller and/or the lower roller so as to compensate thickness fluctuation of the material belt; The limiting piece is used for limiting the maximum clamping pressure and/or the minimum rolling clearance, and is provided with a scale piece to realize visual setting of the clamping pressure or the rolling clearance.
  4. 4. The scrap tightening strap cutter of claim 1 wherein, The height adjusting assembly comprises a synchronous lifting mechanism, so that the relative positions of the traction tightening assembly and the fixed-length cutting assembly are kept unchanged in the height adjusting process; The synchronous lifting mechanism comprises a plurality of guide rods, a guide bearing, two transmission screw rods, two transmission nuts, two fixing seats, two sliding seats and a synchronous assembly; The two ends of the guide rods are respectively fixedly connected with the two fixing seats, the guide bearings are sleeved outside the guide rods in a sliding mode and are connected with the sliding seats, the transmission nuts are fixedly connected with the two opposite sides of the sliding seats, the transmission screw rods are sleeved in the transmission nuts in a transmission mode, and the two ends of the transmission screw rods are respectively connected with the two fixing seats in a rotating mode; The synchronous assembly is connected to two transmission screw rods between the sliding seat and the fixed seat at the lower part in the vertical direction, the tail ends of the two transmission screw rods extending out of the fixed seat at the upper part are connected with hand wheels, any one of the two transmission screw rods is rotated to drive one transmission screw rod, the other transmission screw rod is synchronously driven by the synchronous assembly, and the synchronous assembly is used for synchronously adjusting the lifting of the two sides of the sliding seat, so that the lifting balance of each part on the sliding seat is realized; The lower part of the fixed seat is fixedly connected with the bracket, the sliding seat is provided with the traction tightening assembly, the fixed-length cutting assembly, the dislocation preventing detection assembly and the conveying channel, and the upper part of the fixed seat is provided with the control unit.
  5. 5. The scrap tightening strap cutter of claim 4 wherein, The height adjusting assembly further comprises a height scale and a locking mechanism, and the height scale and the locking mechanism are used for realizing visual reading of the height position and locking fixation; The two locking mechanisms are connected to the sliding seat and are respectively sleeved on the two transmission screw rods, and the positions of the sliding seat on the transmission screw rods are locked through rotation of screws and a quick lock wrench.
  6. 6. The scrap tightening strap cutter of claim 1 wherein, The control unit comprises a PLC controller and a man-machine interaction interface terminal, and is used for setting the upper limit of the output torque of the torque motor and the set length of the waste section of the material belt cut by the fixed-length cutting assembly.
  7. 7. The scrap tightening strap cutter of claim 1 wherein, The control unit is configured to at least one of stop the torque motor, prohibit the fixed length cutting assembly from acting, and output a stop or pause interlock signal to the punching machine and/or the feeder to prevent the punching die from producing a press die or a misplaced punching when the optical fiber sensor detects that the positioning hole is misaligned or the positional deviation exceeds a preset threshold.
  8. 8. The scrap tightening strap cutter of claim 1 wherein, The fixed-length cutting assembly comprises a cutting knife and a driving mechanism, wherein the control unit triggers the parameter of the set length by counting the conveying length of the material belt, so that the driving mechanism acts to realize periodic fixed-length cutting, and the conveying length count meets one or a combination of the following modes: A rotary encoder is arranged at the shaft end of an upper roller or a lower roller of the traction tightening assembly, and the conveying length is converted through pulse counting of the rotary encoder; counting the positioning holes of the material belt based on the optical fiber sensor and converting the conveying length by combining hole pitch parameters; and a displacement sensor is arranged on the conveying path of the material belt, and the conveying length of the material belt is directly measured through the displacement sensor.
  9. 9. A method for controlling cutting of a scrap tightening belt for sheet metal stamping, which is applied to the scrap tightening belt cutting machine according to any one of claims 1 to 8, and is characterized by comprising the following steps, S1, traction starting, namely controlling a traction tightening assembly to enter a working state when a punching machine tool is started in punching and/or a feeder is started in feeding; S2, pressing traction, namely controlling a torque motor to drive an upper roller and/or a lower roller to apply traction force to a waste section of the material belt so as to keep the material belt tight, and setting an upper limit of output torque of the torque motor based on a pressing force threshold of the feeder so as to limit the traction force to be smaller than the pressing force of the feeder; s3, positioning measurement, namely detecting the state of a positioning hole/position of the material belt through an optical fiber sensor, outputting an interlocking signal when abnormality is detected, and executing stopping or prohibiting actions; s4, fixed-length cutting, namely triggering a fixed-length cutting assembly to act according to a set length in the traction tightening process so as to cut the waste sections of the material belt, and enabling the cut waste to be collected and collected through a conveying channel to a waste hopper.
  10. 10. The method for controlling cutting of a scrap tightening strap according to claim 9 wherein, The setting of the upper limit of the torque motor output torque comprises mapping the pressing force threshold of the feeder to the maximum allowable traction force, and converting the maximum allowable traction force into the maximum allowable output torque of the torque motor according to the roller radius of the output traction force.

Description

Scrap tightening material belt cutting machine for sheet metal stamping and cutting control method Technical Field The invention relates to the technical field of sheet metal stamping, in particular to a scrap tightening material belt cutting machine for sheet metal stamping and a cutting control method. Background In the sheet metal stamping production process, a continuous material belt mode is generally adopted to send the sheet metal into a stamping die to finish multi-station or progressive stamping forming. With the continuous increase of stamping die length, especially under large-scale mould or multistation mould application scene, rely on the feeder that sets up at stamping die head end alone to advance the material area, often be difficult to guarantee the material area at the accuracy and the stability of putting in place of mould tail end, easily appear feeding inadequately, offset or lax scheduling problem, and then influence stamping accuracy and product quality. In order to solve the above problems, in the prior art, a winding machine is usually added at the tail end of a stamping die, and a waste material belt is wound up, so that a reverse traction force and a pull force are applied to the belt, and the belt is still kept in a tight state in a loosening and feeding stage of the feeding machine, so that the belt can be stably pulled and accurately fed to a processing position of the stamping die. However, the winding machine needs to strictly control the applied tension in practical application, so that the tension is prevented from exceeding the pressing force of the feeding machine, otherwise, excessive winding of the material belt is easily caused, and the feeding pitch is disturbed, the products are misplaced and even the die is damaged. In addition, the existing winding machine mostly adopts an independent floor type structure, has larger equipment volume, not only needs to reserve larger installation and operation space, but also is generally arranged outside a punching machine tool and forms a split structure with the punching machine tool. On the one hand, the arrangement mode increases the occupied area of a production field and reduces the compactness of a production line, and on the other hand, as the rolling, traction and material belt moving parts are exposed, a protective cover or a fence is often required to be additionally arranged, the complexity of equipment and the safety management cost are increased, and certain potential operational safety hazards still exist. Meanwhile, the existing winding machine is generally only provided with a winding function, waste materials are required to be cut and collected through subsequent manual work or auxiliary equipment, the operation flow is complex, the waste material collection efficiency is low, and the automation and clean management of a stamping production line are not facilitated. In summary, it is found that the prior art has at least the following technical problems: The winding machine only has the winding function in the existing stamping production, has large volume, low safety, needs fine matching between winding tension and the pressing force of the feeding machine, has high control difficulty, and has the technical problems of separating waste cutting and collecting functions and low automation degree. Disclosure of Invention The invention aims to provide a scrap tightening material belt cutting machine for sheet metal stamping and a cutting control method, which are used for solving the technical problems that in the existing stamping production, a winding machine only has a winding function, the volume is large, the safety is low, the winding tension and the press force of a feeder are required to be finely matched, the control difficulty is high, the scrap cutting and collecting functions are separated, and the automation degree is low. The preferred technical solutions of the technical solutions provided by the present invention can produce a plurality of technical effects described below. In order to solve the technical problems, the invention provides the following technical scheme: The invention provides a scrap tightening strip cutting machine for sheet metal stamping, which comprises a support, a traction tightening assembly, a scrap collecting assembly, a positioning plate and an optical fiber sensor, wherein the support is arranged on a stamping machine frame and is adjacent to the tail end of a stamping die, the traction tightening assembly is arranged on the support and comprises an upper roller, a lower roller and a torque motor, the torque motor drives the upper roller and/or the lower roller to rotate so as to apply traction to a scrap section of the strip to keep the strip tight, the output torque of the torque motor is adjustable and is used for limiting the traction force to be smaller than the pressing force threshold value of a feeder of the stamping machine, the dislocation prevention detection as