Numerical control laser cutting and punching compound machine tool and control method thereof

Abstract

The invention relates to the technical field of numerical control machine tools, and provides a numerical control laser cutting and punching compound machine tool and a control method thereof.The numerical control laser cutting and punching compound machine tool comprises a machine tool body structure and a controller, and the machine tool body structure comprises a workbench, a four-axis linkage portal frame, a quick die changing assembly and an anti-interference system; a conveying mechanism is arranged on the top face of the workbench, a dust cover is arranged at the top of one end of the workbench and arranged on the upstream of the workbench in the conveying direction, a four-axis linkage portal frame is arranged in the dust cover, a controller is fixedly installed on the side wall of the dust cover, and the bottom end of the four-axis linkage portal frame is fixedly connected to the two sides of the top face of the workbench. A moving assembly is arranged on a cross beam of the four-axis linkage portal frame; the quick die changing assembly is arranged on one side of the cross beam; the anti-interference system comprises a plurality of echelette gratings and a plurality of motion control cards. Laser cutting and stamping are cooperatively processed, so that the overall efficiency is improved; and a dynamic anti-interference system avoids interference and collision of parts, and the machining continuity is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of numerical control machine tools, and particularly to a numerical control laser cutting and punching composite machine tool and a control method thereof. Background Art

[0002] With the booming development of the sheet metal industry, laser processing and blanking manufacturing have become essential components in sheet metal processing. Laser and blanking each have their own advantages. The processing cost of numerical control punching is low, and small-size forming processing can also be carried out. Laser cutting machines are generally used as the main tools for cutting thin and medium-thick plates, and have better dimensional accuracy and higher processing speed compared to plasma and flame cutting.

[0003] How to better combine the advantages of the two for combined production has always been a research topic in the industry and the direction of future industrial development. When existing numerical control presses and laser cutting machines are used for single-machine processing, the separation of processes leads to low efficiency; while most composite machine tools adopt an alternating working mode of a laser head and a punching unit, lacking dynamic collaborative control and having a high risk of interference between moving parts. Therefore, a numerical control laser cutting and punching composite machine tool and a control method thereof are proposed. Summary of the Invention

[0004] The present invention provides a numerical control laser cutting and punching composite machine tool and a control method thereof, aiming to solve the problems of low efficiency, lack of dynamic collaborative control, and high risk of interference between moving parts of existing machine tools.

[0005] The present invention is implemented as follows. A numerical control laser cutting and punching composite machine tool and a control method thereof, the numerical control laser cutting and punching composite machine tool includes: a machine tool main body structure and a controller. The machine tool main body structure includes a workbench, a four-axis linkage gantry, a quick die change assembly, and an anti-interference system; A conveying mechanism is arranged on the top surface of the workbench. A dust cover is provided at the top of one end of the workbench. The dust cover is arranged upstream in the transportation direction of the workbench. The four-axis linkage gantry is arranged in the dust cover. The controller is fixedly installed on the side wall of the dust cover. The bottom end of the four-axis linkage gantry is fixedly connected to both sides of the top surface of the workbench. A moving assembly is arranged on the cross beam of the four-axis linkage gantry; The quick die change assembly is arranged on one side of the cross beam. The quick die change assembly includes a linear slide rail, a punching unit, a pressure sensor, and a tool magazine. The linear slide rail is installed on the side wall of the cross beam. The base of the punching unit is slidably connected to the linear slide rail. A moving device is arranged in the linear slide rail. The tool magazine is slidably connected to the top of the workbench; The anti-interference system includes multiple infrared gratings and multiple motion control cards. The multiple infrared gratings are arranged around the area corresponding to the stamping unit on the top of the workbench to form a safety protection area. The multiple motion control cards are respectively arranged at the ends of the movement tracks of the X-axis slide, Y-axis slide, and Z-axis slide and at one end of the stamping unit close to the moving device, and are used to collect the position data of the X-axis slide, Y-axis slide, Z-axis slide, and stamping unit in real time, and predict the interference risk through a collision prediction algorithm.

[0006] Preferably, the moving component includes an X-axis slide. The X-axis slide is slidably connected to the bottom of the cross beam of the four-axis linkage gantry. The X-axis slide is driven by an X-axis drive motor. A Y-axis slide is slidably connected to the middle of the X-axis slide. The Y-axis slide is driven by a Y-axis drive motor. Both the X-axis drive motor and the Y-axis drive motor are linear motors. The X-axis drive motor is installed on the cross beam of the four-axis linkage gantry through a flange. The Y-axis drive motor is installed at one end of the X-axis slide through a flange. A Z-axis slide is slidably connected to the Y-axis slide. The Z-axis slide is of a ball screw structure and is equipped with a grating scale closed-loop feedback. A laser cutting head is fixedly connected to the bottom of the Z-axis slide. The laser cutting head uses an integrated fiber laser. The Z-axis slide drives the laser cutting head to move in the vertical direction. The lead screw nut and the lifting module of the laser cutting head are rigidly connected by bolts. A grating scale reading device is installed between the Z-axis slide and the Y-axis slide.

[0007] Preferably, the grating scale reading device communicates with the controller in real time. The grating scale reading device includes a grating main scale and a reading head. The grating main scale is fixedly connected to the side wall of the Z-axis slide. The reading head is fixedly installed on the side wall of the Y-axis slide facing the grating main scale. When the grating main scale slides with the Z-axis slide, the reading head reads the data and transmits it to the controller.

[0008] Preferably, the die library station uses a V-shaped positioning groove to cooperate with the conical guide pin at the bottom of the stamping unit.

[0009] Preferably, the moving device includes a rack, a gear, a rotating shaft, and a servo motor. The rack is fixedly connected to a part of the side wall of the base located inside the linear slide rail. An opening is formed in the side wall of the chute of the linear slide rail facing the rack. The gear is arranged in the opening. The gear meshes with the rack. One end of the rotating shaft is fixedly connected to the center of the gear, and the other end passes through the linear slide rail and is connected to the output end of the servo motor. The servo motor is used to drive the gear to rotate, and drives the stamping unit to move horizontally through the meshing of the rack and the gear. The punching force is calibrated in real time through a pressure sensor.

[0010] Preferably, the laser cutting head and the central axis of the stamping die are coplanar, and mechanical calibration is used to ensure that the laser cutting head and the stamping die are in the same processing plane at the Z-axis zero point.

[0011] Preferably, when the distance between the X-axis slide, Y-axis slide, Z-axis slide and the stamping unit is < 50 mm, the speed is reduced, and when it is < 10 mm, an emergency stop is triggered.

[0012] A control method for a numerically controlled laser cutting and punching compound machine tool includes: First, the moving component and the stamping unit are restored to the initial state. Subsequently, the plate to be cut and punched is placed on the conveying mechanism from the inlet end of the workbench, and the conveying mechanism is started to drive the plate to move towards the other end of the workbench; During cutting, the conveying mechanism transports the part of the plate to be cut under the four-axis linkage gantry. Under the combined action of the X-axis driving motor and the Y-axis driving motor, through the sliding of the X-axis slide and the Y-axis slide, the laser cutting head is moved to the initial position of the cutting trajectory. Subsequently, the Z-axis driving motor drives the Z-axis slide to slide, driving the laser cutting head closer to the plate. The length of the downward slide of the Z-axis slide is determined according to the thickness of the plate. The Z-axis slide drives the main scale of the grating to slide downward, and the reading head reads the value and transmits it to the controller in real time until the laser cutting head reaches the cutting point, and the Z-axis driving motor stops operating. Subsequently, the X-axis driving motor and the Y-axis driving motor drive the X-axis slide and the Y-axis slide to slide, driving the laser cutting head to cut the plate according to the cutting trajectory; after cutting is completed, the X-axis slide, Y-axis slide and Z-axis slide return to the initial position, and the conveying mechanism drives the plate to continue moving; During punching, the conveying mechanism transports the part of the plate that needs to be punched under the stamping unit. The tool magazine slides along the linear slide rail to the lower part of the stamping unit. The servo motor drives the gear to rotate, and drives the stamping unit to move horizontally to the upper part of the appropriate tool through the rack. The stamping unit presses down to wear the tool. After wearing is completed, the tool magazine returns to its original position. The stamping unit presses down to punch the plate. Subsequently, the conveying mechanism drives the plate to move a certain distance, and the stamping unit presses down again until all punching operations are completed. The stamping unit returns to its original position, and the conveying mechanism drives the plate to continue moving.

[0013] Compared with the prior art, the beneficial effects of the present invention are: The collaborative processing of laser cutting and stamping in the present invention reduces the number of workpiece clamping times. Combined with the intelligent path optimization algorithm, the overall efficiency is improved; the controller synchronously controls the progress of laser cutting and stamping, and the dynamic anti-interference system ensures the minimum safety distance between the laser head and the stamping unit, avoiding interference and collision, and improving the processing continuity. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 It is a schematic side-sectional structure diagram of an embodiment of the present invention; Figure 2 It is a schematic front-sectional structure diagram of an embodiment of the present invention; Figure 3 It is a schematic bottom-sectional structure diagram of a moving component of an embodiment of the present invention; Figure 4 is Figure 1 an enlarged structure diagram of part A in

[0016] The reference numerals in the drawings are: 1, workbench; 2, dust-proof cover; 3, four-axis linkage gantry; 4, moving component; 401, X-axis slide; 402, Y-axis slide; 403, Z-axis slide; 5, laser cutting head; 6, grating ruler reading device; 7, quick die change component; 701, linear slide rail; 702, stamping unit; 703, pressure sensor; 704, die library; 8, moving device; 801, rack; 802, gear; 803, rotating shaft; 804, servo motor; 9, infrared grating; 10, motion control card; 11, controller. Detailed implementation manners

[0017] In order to more fully understand the technical content of the present invention, the technical solution of the present invention will be further introduced and described below in conjunction with specific embodiments, but not limited thereto. The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present invention.

[0018] Refer to Figures 1 to 4 , the numerical control laser cutting and punching combined machine tool includes: a machine tool main body structure and a controller 11, and the machine tool main body structure includes a workbench 1, a four-axis linkage gantry 3, a quick die change component 7 and an anti-interference system; A conveying mechanism is provided on the top surface of the workbench 1. A dust-proof cover 2 is provided at the top of the inlet end of the workbench 1. The dust-proof cover 2 is arranged upstream in the transportation direction of the workbench 1. A four-axis linkage gantry 3 is arranged in the dust-proof cover 2. The bottom end of the four-axis linkage gantry 3 is fixedly connected to both sides of the top surface of the workbench 1. A moving component 4 is arranged on the cross beam of the four-axis linkage gantry 3. The moving component 4 includes an X-axis slide 401. The X-axis slide 401 is slidably connected to the bottom of the cross beam of the four-axis linkage gantry 3. The X-axis slide 401 is driven by an X-axis drive motor. A Y-axis slide 402 is slidably connected to the middle of the X-axis slide 401. The Y-axis slide 402 is driven by a Y-axis drive motor. Both the X-axis drive motor and the Y-axis drive motor are linear motors. The X-axis drive motor is installed on the cross beam of the four-axis linkage gantry 3 through a flange. The Y-axis drive motor is installed on one end of the X-axis slide 401 through a flange. A Z-axis slide 403 is slidably connected to the Y-axis slide 402. The Z-axis slide 403 is a ball screw structure and is equipped with a grating scale closed-loop feedback. A laser cutting head 5 is fixedly connected to the bottom of the Z-axis slide 403. The laser cutting head 5 uses an integrated fiber laser. The Z-axis slide 403 drives the laser cutting head 5 to move in the vertical direction. The lead screw nut and the lifting module of the laser cutting head 5 are rigidly connected by bolts. A grating scale reading device 6 is installed between the Z-axis slide 403 and the Y-axis slide 402. The grating scale reading device 6 communicates with the controller 11 in real time. The grating scale reading device 6 includes a grating main scale and a reading head. The grating main scale is fixedly connected to the side wall of the Z-axis slide 403. The reading head is fixedly installed on the side wall of the Y-axis slide 402 facing the grating main scale. When the grating main scale slides with the Z-axis slide 403, the reading head reads the data and transmits it to the controller 11. The controller 11 is fixedly installed on the side wall of the dust-proof cover 2. The controller 11 is used to control the operation of the entire composite machine tool and provide the best path for operation.

[0019] The quick die change assembly 7 is arranged on one side of the crossbeam. The quick die change assembly 7 includes a linear slide rail 701, a stamping unit 702, a pressure sensor 703, and a tool magazine 704. The linear slide rail 701 is installed on the side wall of the crossbeam. The base of the stamping unit 702 is slidably connected to the linear slide rail 701, and a moving device 8 is arranged inside the linear slide rail 701. The moving device 8 includes a rack 801, a gear 802, a rotating shaft 803, and a servo motor 804. The rack 801 is fixedly connected to a partial side wall of the base located inside the linear slide rail 701. A slot is formed on the side wall of the chute of the linear slide rail 701 facing the rack 801. The gear 802 is arranged in the slot. The gear 802 meshes with the rack 801. One end of the rotating shaft 803 is fixedly connected to the center of the gear 802, and the other end penetrates through the linear slide rail 701 and is connected to the output end of the servo motor 804. The servo motor 804 is used to drive the gear 802 to rotate, and drives the stamping unit 702 to move horizontally through the meshing of the rack 801 and the gear 802. The punching force is calibrated in real time through the pressure sensor 703. The tool magazine 704 is slidably connected to the top of the workbench 1. The workstations of the tool magazine 704 adopt V-shaped positioning grooves to cooperate with the conical guide pins at the bottom of the stamping unit 702 to realize the radial positioning of the die. The laser cutting head 5 is coplanar with the central axis of the stamping die, and it is ensured through mechanical calibration that the laser cutting head 5 and the stamping die are in the same machining plane when at the zero point of the Z axis.

[0020] The anti-interference system includes a plurality of infrared gratings 9 and a plurality of motion control cards 10. The plurality of infrared gratings 9 are arranged around the area corresponding to the stamping unit 702 on the top of the workbench 1 to form a safety protection area. The plurality of motion control cards 10 are respectively arranged at the ends of the movement tracks of the X-axis slide 401, the Y-axis slide 402, the Z-axis slide 403, and one end of the stamping unit 702 close to the moving device, and are used to collect the position data of the X-axis slide 401, the Y-axis slide 402, the Z-axis slide 403, and the stamping unit 702 in real time, and predict the interference risk through a collision prediction algorithm to avoid collision during operation and affecting the work efficiency. If the distance between the X-axis slide 401, the Y-axis slide 402, the Z-axis slide 403 and the stamping unit 702 is <50 mm, the speed is reduced, and if it is <10 mm, an emergency stop is triggered.

[0021] The control method of this numerically controlled laser cutting and punching composite machine tool includes: First, restore the moving assembly 4 and the stamping unit 702 to the initial state. Then, place the plate to be cut and punched on the conveying mechanism from the inlet end of the workbench 1, and start the conveying mechanism to drive the plate to move towards the other end of the workbench 1.

[0022] During cutting, the conveying mechanism transports the part of the sheet to be cut under the four-axis linkage gantry 3. Under the combined action of the X-axis drive motor and the Y-axis drive motor, the laser cutting head 5 is moved to the initial position of the cutting trajectory through the sliding of the X-axis slide 401 and the Y-axis slide 402. Subsequently, the Z-axis drive motor drives the Z-axis slide 403 to slide, driving the laser cutting head 5 closer to the sheet. The length of the downward slide of the Z-axis slide 403 is determined according to the thickness of the sheet. The Z-axis slide 403 drives the main grating ruler to slide downward, and the reading head reads the value and transmits it to the controller 11 in real time until the laser cutting head 5 reaches the cutting point, at which time the Z-axis drive motor stops operating. Subsequently, the X-axis drive motor and the Y-axis drive motor drive the X-axis slide 401 and the Y-axis slide 402 to slide, driving the laser cutting head 5 to cut the sheet according to the cutting trajectory. After cutting is completed, the X-axis slide 401, the Y-axis slide 402, and the Z-axis slide 403 return to the initial position, and the conveying mechanism drives the sheet to continue moving.

[0023] During punching, the conveying mechanism transports the part of the sheet that needs to be punched under the stamping unit 702. The tool magazine 704 slides along the linear slide rail 701 to under the stamping unit 702. The servo motor 804 drives the gear 802 to rotate, and drives the stamping unit 702 to move horizontally to above the appropriate tool through the rack 801. The stamping unit 702 presses down to mount the tool. After mounting is completed, the tool magazine 704 returns to its original position. The stamping unit 702 presses down to punch the sheet. Subsequently, the conveying mechanism drives the sheet to move a certain distance, and the stamping unit 702 presses down again until all punching operations are completed. The stamping unit 702 returns to its original position, and the conveying mechanism drives the sheet to continue moving.

[0024] The above-mentioned cutting and punching operations can be carried out simultaneously. The controller 11 provides the best path according to the intelligent path optimization algorithm, and the multiple infrared gratings 9 and multiple motion control cards 10 of the anti-interference system provide guarantee for the combined operation of the two.

[0025] The above-described embodiments are only a part of the embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person of ordinary skill in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A CNC laser cutting and punching compound machine tool, characterized in that: include: A machine tool main structure and a controller (11), wherein the machine tool main structure comprises a workbench (1), a four-axis linkage gantry (3), a quick mold change assembly (7) and an anti-interference system; A conveying mechanism is arranged on the top surface of the workbench (1); a dust cover (2) is arranged on the top of one end of the workbench (1); the dust cover (2) is arranged upstream of the workbench (1) in the transport direction; a four-axis linkage gantry (3) is arranged in the dust cover (2); a controller (11) is fixedly mounted on the side wall of the dust cover (2); the bottom end of the four-axis linkage gantry (3) is fixedly connected to both sides of the top surface of the workbench (1); and a moving component (4) is arranged on the crossbeam of the four-axis linkage gantry (3); A quick die change assembly (7) is arranged on one side of the crossbeam. The quick die change assembly (7) comprises a linear slide rail (701), a punching unit (702), a pressure sensor (703) and a die library (704). The linear slide rail (701) is installed on the side wall of the crossbeam. The base of the punching unit (702) is slidably connected to the linear slide rail (701). A moving device (8) is arranged inside the linear slide rail (701). The die library (704) is slidably connected to the top of the workbench (1). The anti-interference system comprises a plurality of infrared gratings (9) and a plurality of motion control cards (10). The plurality of infrared gratings (9) are arranged on the top of the workbench (1) and around the area corresponding to the stamping unit (702) to form a safety protection zone; the plurality of motion control cards (10) are respectively arranged at the ends of the motion trajectories of the X-axis slide (401), the Y-axis slide (402), and the Z-axis slide (403) and at one end of the stamping unit (702) close to the moving device (8), and are used to collect the position data of the X-axis slide (401), the Y-axis slide (402), the Z-axis slide (403) and the stamping unit (702) in real time, and to predict the interference risk through a collision prediction algorithm.

2. The CNC laser cutting and punching compound machine tool according to claim 1, characterized in that: The moving assembly (4) comprises an X-axis slide (401), the X-axis slide (401) is slidably connected to the bottom of the crossbeam of the four-axis linkage gantry (3), the X-axis slide (401) is driven by an X-axis drive motor, a Y-axis slide (402) is slidably connected to the middle of the X-axis slide (401), the Y-axis slide (402) is driven by a Y-axis drive motor, the X-axis drive motor and the Y-axis drive motor are both linear motors, the X-axis drive motor is mounted on the crossbeam of the four-axis linkage gantry (3) via a flange, and the Y-axis drive motor is mounted on the X-axis slide (402) via a flange. 1) At one end, a Y-axis slide (402) is slidably connected to a Z-axis slide (403), the Z-axis slide (403) is a ball screw structure, and is equipped with a grating scale closed-loop feedback. A laser cutting head (5) is fixedly connected to the bottom of the Z-axis slide (403), and the laser cutting head (5) adopts an integrated fiber laser. The Z-axis slide (403) drives the laser cutting head (5) to move in a vertical direction. The screw nut and the lifting module of the laser cutting head (5) are rigidly connected by bolts, and a grating scale reading device (6) is installed between the Z-axis slide (403) and the Y-axis slide (402).

3. The CNC laser cutting and punching compound machine tool according to claim 2, characterized in that: The grating scale reading device (6) communicates with the controller (11) in real time; the grating scale reading device (6) comprises a grating main scale and a reading head, the grating main scale is fixedly connected to the side wall of the Z-axis slide (403), and the reading head is fixedly installed on the side wall of the Y-axis slide (402) facing the grating main scale, and when the grating main scale slides with the Z-axis slide (403), the reading head reads and transmits the reading to the controller (11).

4. The CNC laser cutting and punching compound machine tool according to claim 1, characterized in that: The mold library (704) station adopts a V-shaped positioning groove to cooperate with the tapered guide pin at the bottom of the punching unit (702).

5. The CNC laser cutting and punching compound machine tool according to claim 4, characterized in that: The moving device (8) comprises a rack (801), a gear (802), a rotating shaft (803) and a servo motor (804); the rack (801) is fixedly connected to a part of the side wall of the base located inside the linear slide rail (701); a slot is provided in the slide groove of the linear slide rail (701) toward the side wall of the rack (801); the gear (802) is arranged in the slot; the gear (802) and the rack (801) are meshed; one end of the rotating shaft (803) is fixedly connected to the center of the gear (802); the other end passes through the linear slide rail (701) and is connected to the output end of the servo motor (804); the servo motor (804) is used to drive the gear (802) to rotate, and the stamping unit (702) is driven to move horizontally through the meshing of the rack (801) and the gear (802); and the stamping force is calibrated in real time through the pressure sensor (703).

6. The CNC laser cutting and punching compound machine tool according to claim 1, characterized in that: The laser cutting head (5) is coplanar with the central axis of the stamping die, and mechanical calibration is used to ensure that the laser cutting head (5) and the stamping die are in the same processing plane when the Z-axis is zero.

7. The CNC laser cutting and punching compound machine tool according to claim 5, characterized in that: When the distance between the X-axis slide (401), the Y-axis slide (402), the Z-axis slide (403) and the punching unit (702) is less than 50 mm, a deceleration is triggered, and when it is less than 10 mm, an emergency stop is triggered.

8. The control method of any CNC laser cutting and punching compound machine tool according to any one of claims 1 to 7, characterized in that: include: First, the moving assembly (4) and the punching unit (702) are restored to their initial state, and then the plate to be cut and punched is placed from the inlet end of the workbench (1) onto the conveying mechanism, and the conveying mechanism is started to drive the plate to move toward the other end of the workbench (1); During cutting, the conveying mechanism transports the portion of the plate to be cut to the bottom of the four-axis linkage gantry (3). Under the joint action of the X-axis drive motor and the Y-axis drive motor, the laser cutting head (5) is moved to the initial position of the cutting track through the sliding of the X-axis slide (401) and the Y-axis slide (402). Then, the Z-axis drive motor drives the Z-axis slide (403) to slide, driving the laser cutting head (5) close to the plate. The length of the Z-axis slide (403) sliding down is determined according to the thickness of the plate. The Z-axis slide (403) drives the grating The main ruler slides down, and the reading head reads and transmits the reading to the controller (11) in real time until the laser cutting head (5) reaches the cutting point, and the Z-axis driving motor stops operating. Then, the X-axis driving motor and the Y-axis driving motor drive the X-axis slide (401) and the Y-axis slide (402) to slide, driving the laser cutting head (5) to cut the plate according to the cutting trajectory; after the cutting is completed, the X-axis slide (401), the Y-axis slide (402) and the Z-axis slide (403) are restored to the initial position, and the conveying mechanism drives the plate to continue to move; When punching, the conveying mechanism transports the part of the plate that needs to be punched to the bottom of the punching unit (702), the mold library (704) slides along the linear slide rail (701) to the bottom of the punching unit (702), the servo motor (804) drives the gear (802) to rotate, and drives the punching unit (702) to move horizontally above a suitable mold through the rack (801), the punching unit (702) presses down to wear the mold, and after the wearing is completed, the mold library (704) returns to its original position, and the punching unit (702) presses down to punch the plate, and then the conveying mechanism drives the plate to move a distance, and the punching unit (702) presses down again until all punching work is completed, the punching unit (702) returns to its original position, and the conveying mechanism drives the plate to continue moving.

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