A circular hole processing device

Abstract

The present invention relates to a punching device, more specifically a circular hole processing device, comprising a material positioning mechanism, a material limiting mechanism, a pushing mechanism and a circular hole punching mechanism, wherein the material positioning mechanism is fixedly mounted on the material limiting mechanism, the pushing mechanism is fixedly mounted on the material limiting mechanism, the circular hole punching mechanism is fixedly mounted on the pushing mechanism, and the circular hole punching mechanism passes through a through hole provided on the material limiting mechanism; the device can directly perform circular cutting on the middle position of the material, can adapt to materials of different thicknesses, can perform circular cutting of different sizes on the material, and can cut the material at any position.

Description

Technical Field

[0001] The invention relates to a punching device, more specifically to a round hole processing device. Background Art

[0002] During the production and processing of electric vehicles, it is necessary to punch holes in pipes, plastic materials or parts of other materials. The inventors have found that in the actual processing process, it is necessary to replace chisels of different sizes in order to process circular holes of different diameters. This requires the workshop to purchase sufficient tools of different models to ensure that the processing is not affected. Moreover, different models of tools need to be constantly replaced according to different orders, which also reduces the production speed. At the same time, frequent tool replacement affects the performance of the lathe and the operation is also more troublesome. Summary of the invention

[0003] The main technical problem solved by the present invention is to provide a circular hole processing device, which can directly perform circular cutting on the middle position of the material, can adapt to materials of different thicknesses, can perform circular cutting of different sizes on the material, and can cut at any position of the material.

[0004] The purpose of the present invention is achieved through the following technical solutions:

[0005] A round hole processing device comprises a material positioning mechanism, a material limiting mechanism, a pushing mechanism and a round hole punching mechanism, wherein the material positioning mechanism is fixedly mounted on the material limiting mechanism, the pushing mechanism is fixedly mounted on the material limiting mechanism, the round hole punching mechanism is fixedly mounted on the pushing mechanism, and the round hole punching mechanism passes through a through hole arranged on the material limiting mechanism.

[0006] As a further optimization of the technical solution, the material positioning mechanism described in a round hole processing device of the present invention includes a fixed frame, a rotating disk, a top slide, a hydraulic cylinder, an extrusion pad, and a displacement threaded rod. The displacement threaded rod is rotatably installed in a groove set on the fixed frame. The displacement threaded rod is threadedly connected to the top slide. The top slide is slidably installed in the groove set on the fixed frame. A hydraulic cylinder is fixedly installed on the top slide. An extrusion pad is fixedly installed on the output end of the hydraulic cylinder. The rotating disk is fixedly installed on the displacement threaded rod.

[0007] As a further optimization of the technical solution, the material limiting mechanism described in a circular hole processing device of the present invention includes an installation table, a driving gear, an adjusting motor, a driving sprocket, a synchronous chain, a bidirectional threaded rod, a clamping plate, an adjusting end threaded rod, and an adjusting threaded part. The adjusting motor is fixedly installed on the installation table, and the output end of the adjusting motor is fixedly installed with a driving gear, the driving gear is meshed with the driving sprocket, the driving sprocket is meshed with the synchronous chain, the driving sprocket is fixedly installed on the bidirectional threaded rod, the bidirectional threaded rod is rotatably installed in a groove set on the installation table, the clamping plate is slidably installed in a groove set on the installation table, the adjusting threaded part is slidably installed in a groove set on the clamping plate, the adjusting end threaded rod is rotatably installed in the groove set on the adjusting threaded part, the adjusting end threaded rod is threadedly connected to the clamping plate, the adjusting threaded part is threadedly connected to the bidirectional threaded rod, and a fixing frame is fixedly installed on the installation table.

[0008] As a further optimization of the technical solution, the pushing mechanism described in a round hole processing device of the present invention includes a U-shaped frame, a lifting motor, a lifting sprocket, a lifting chain, a lifting threaded rod, and a lifting plate. The lifting motor is fixedly installed on the U-shaped frame, and a lifting sprocket is fixedly installed on the output end of the lifting motor. The lifting sprocket is meshed with the lifting chain. A lifting threaded rod is fixedly installed on the lifting sprocket. The lifting threaded rod is rotatably installed in a groove set on the installation table. The lifting threaded rod is threadedly connected to the lifting plate. The lifting plate is slidably installed in a groove set on the U-shaped frame, and the U-shaped frame is fixedly installed on the installation table.

[0009] As a further optimization of the technical solution, the circular hole punching mechanism described in a circular hole processing device of the present invention includes a cutting motor, a driving seat plate, a circular bottom plate, a circular pipe, a limiting cylinder, a dome plate, a long cutting knife, an internally threaded pipe, a rotating threaded short column, a spacing adjustment screw, a driven bevel gear, an internal motor, and a driving bevel gear. The cutting motor is fixedly mounted on the lifting plate, and the output end of the cutting motor is fixedly mounted with a driving seat plate, and the internal motor is fixedly mounted in a groove arranged on the driving seat plate, and the output end of the internal motor is fixedly mounted with a driving bevel gear, and the driving bevel gear is meshed with the driven bevel gear, and the driven bevel gear is fixedly mounted on the spacing adjustment screw, and the spacing adjustment screw is rotatably mounted on the circular bottom plate. The groove set on the plate drives the seat plate to be fixedly connected with the circular bottom plate, the active bevel gear is rotatably installed in the groove set on the circular bottom plate, the driven bevel gear is rotatably installed in the groove set on the circular bottom plate, the internal threaded pipe is fixedly installed on the circular bottom plate, a circular pipe fitting is fixedly installed on the circular bottom plate, the limiting cylinder is slidably installed in the through hole set on the circular pipe fitting, the rotating threaded short column is threadedly connected with the internal threaded pipe, the limiting cylinder is fixedly installed on the dome plate, and a rotating threaded short column is rotatably installed in the groove set on the dome plate, the long strip cutting knife is slidably installed in the groove set on the circular bottom plate, the long strip cutting knife is threadedly connected with the spacing adjustment screw, and the long strip cutting knife is slidably installed in the groove set on the dome plate.

[0010] The beneficial effects of the round hole processing device of the present invention are:

[0011] 1. Place the material to be processed on the installation table and start the adjusting motor. The adjusting motor drives the gear to rotate, which drives the sprocket to rotate, which drives the sprocket to rotate the bidirectional threaded rod. The bidirectional threaded rod is threadedly connected with the adjusting threaded piece. At this time, the adjusting threaded piece drives the clamping plate to move. When the clamping plates on both sides move toward the middle at the same time to clamp the material, the position of the material is fixed. At the same time, the position of the hole punched by the punching mechanism is limited to the middle of the material.

[0012] 2. Rotate the adjusting end threaded rod on one side, and the adjusting end threaded rod is threadedly connected to the clamping plate. At this time, the adjusting end threaded rod drives the adjusting threaded part to move upward, so that the adjusting threaded part is separated from the bidirectional threaded rod. Similarly, start the adjusting motor to rotate the bidirectional threaded rod. Since the adjusting threaded part on one side is separated from the bidirectional threaded rod, only the clamping plate on one side moves to clamp the material. At this time, the punching position of the circular hole punching mechanism changes and is no longer in the middle position, thereby achieving the purpose of punching holes at any position of the material.

[0013] 3. The displacement threaded rod is driven to rotate by rotating the rotating disk. The displacement threaded rod is threadedly connected to the top slide. At this time, the top slide drives the hydraulic cylinder and the extrusion pad to move to the specified position, start the hydraulic cylinder, push the extrusion pad to extrude the material, so that the material is fixed. Different extrusion pads are used to extrude the material at different positions to achieve the purpose of stabilizing the material.

[0014] 4. Start the cutting motor, which drives the base plate to rotate, thereby rotating other parts on it, and finally rotating the long cutting knife. Start the lifting motor, which drives the lifting sprocket to rotate, and the lifting sprocket drives the lifting threaded rod to rotate. The lifting threaded rod is threadedly connected to the lifting plate. The lifting plate rises and drives the circular hole punching mechanism to rise. During the rising process of the circular hole punching mechanism, it passes through the through hole set on the installation table, so that the rotating long cutting knife cuts the material. Rotate the rotating threaded short column, and the rotating threaded short column is threadedly connected to the internal threaded pipe. At this time, the rotating threaded short column drives the dome plate to move downward, thereby increasing the exposed length of the long cutting knife, so that thicker materials can be cut. The limiting cylinder slides in the through hole of the circular pipe fitting to limit the position and increase stability.

[0015] 5. Start the internal motor, which drives the active bevel gear to rotate. The active bevel gear meshes with the driven bevel gear. The rotation of the driven bevel gear drives the spacing adjustment screw to rotate. The spacing adjustment screw is threadedly connected to the long strip cutting knife. At this time, the long strip cutting knife moves, and multiple long strip cutting knives move synchronously, thereby adjusting the diameter of the cutting circular hole and achieving the purpose of cutting circular holes of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of a round hole processing device of the present invention.

[0018] Figure 2 It is a three-dimensional structural schematic diagram of a material positioning mechanism 1 of a round hole processing device of the present invention.

[0019] Figure 3 It is a schematic cross-sectional structure diagram of a material positioning mechanism 1 of a round hole processing device of the present invention.

[0020] Figure 4 It is a schematic diagram of the partial three-dimensional structure of a circular hole processing device of the present invention.

[0021] Figure 5 It is a three-dimensional structural schematic diagram of a material limiting mechanism 2 of a round hole processing device of the present invention.

[0022] Figure 6 It is a schematic diagram of the partial cross-sectional structure of a material limiting mechanism 2 of a round hole processing device of the present invention.

[0023] Figure 7 It is a schematic diagram of the partial cross-sectional structure of a material limiting mechanism 2 of a round hole processing device of the present invention.

[0024] Figure 8 It is a three-dimensional structural schematic diagram of an adjusting end threaded rod 2-8 and an adjusting threaded member 2-9 of a circular hole processing device of the present invention.

[0025] Fig. 9 for Figure 5 Schematic diagram of the local enlarged structure of A in FIG.

[0026] Fig.10 It is a three-dimensional structural schematic diagram of a pushing mechanism 3 and a circular hole punching mechanism 4 of a circular hole processing device of the present invention.

[0027] Fig.11 It is a three-dimensional structural schematic diagram of a pushing mechanism 3 of a round hole processing device of the present invention.

[0028] Fig.12 It is a schematic structural diagram of a mounting table 2-1 and a lifting threaded rod 3-5 of a circular hole processing device of the present invention.

[0029] Fig.13 It is a three-dimensional structural schematic diagram of a round hole punching mechanism 4 of a round hole processing device of the present invention.

[0030] Fig.14 It is a three-dimensional structural schematic diagram of a round hole punching mechanism 4 of a round hole processing device of the present invention.

[0031] Fig.15 It is a schematic cross-sectional structure diagram of a circular hole punching mechanism 4 of a circular hole processing device of the present invention.

[0032] In the figure: material positioning mechanism 1; fixed frame 1-1; rotating disk 1-2; top slide 1-3; hydraulic cylinder 1-4; extrusion pad 1-5; displacement threaded rod 1-6; material limiting mechanism 2; installation table 2-1; driving gear 2-2; adjustment motor 2-3; driving sprocket 2-4; synchronous chain 2-5; two-way threaded rod 2-6; clamping plate 2-7; adjustment end threaded rod 2-8; adjustment threaded member 2-9; pushing mechanism 3; U-shaped frame 3-1; lifting motor 3-2; lifting sprocket 3-3; lifting chain 3-4; lifting threaded rod 3-5; lifting plate 3-6; circular hole punching mechanism 4; cutting motor 4-1; driving seat plate 4-2; round bottom plate 4-3; round pipe 4-4; limiting cylinder 4-5; dome plate 4-6; long strip cutting knife 4-7; internal threaded tube 4-8; rotating threaded short column 4-9; spacing adjustment screw 4-10; driven bevel gear 4-11; internal motor 4-12; driving bevel gear 4-13. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings. Specific implementation method one:

[0035] Combine the following Figure 1-15 To illustrate the present embodiment, a circular hole processing device includes a material positioning mechanism 1, a material limiting mechanism 2, a pushing mechanism 3 and a circular hole punching mechanism 4, wherein the material positioning mechanism 1 is fixedly mounted on the material limiting mechanism 2, the pushing mechanism 3 is fixedly mounted on the material limiting mechanism 2, the circular hole punching mechanism 4 is fixedly mounted on the pushing mechanism 3, and the circular hole punching mechanism 4 passes through a through hole set on the material limiting mechanism 2. Specific implementation method 2:

[0037] Combine the following Figure 1-15 Description of this embodiment. This embodiment further describes the first embodiment. The material positioning mechanism 1 includes a fixed frame 1-1, a rotating disk 1-2, a top slide 1-3, a hydraulic cylinder 1-4, an extrusion pad 1-5, and a displacement threaded rod 1-6. The displacement threaded rod 1-6 is rotatably installed in a groove provided on the fixed frame 1-1. The displacement threaded rod 1-6 is threadedly connected to the top slide 1-3. The top slide 1-3 is slidably installed in a groove provided on the fixed frame 1-1. The hydraulic cylinder 1-4 is fixedly installed on the top slide 1-3. The extrusion pad 1-5 is fixedly installed on the output end of the hydraulic cylinder 1-4. The rotating disk 1-2 is fixedly installed on the displacement threaded rod 1-6. Specific implementation method three:

[0039] Combine the following Figure 1-15Description of this embodiment. This embodiment further describes the second embodiment. The material limiting mechanism 2 includes a mounting table 2-1, a driving gear 2-2, an adjusting motor 2-3, a driving sprocket 2-4, a synchronous chain 2-5, a bidirectional threaded rod 2-6, a clamping plate 2-7, an adjusting end threaded rod 2-8, and an adjusting threaded member 2-9. The adjusting motor 2-3 is fixedly mounted on the mounting table 2-1. The output end of the adjusting motor 2-3 is fixedly mounted with a driving gear 2-2. The driving gear 2-2 is meshed with the driving sprocket 2-4, and the driving sprocket 2-4 is meshed with the synchronous chain 2-5. , driving the sprocket 2-4 to be fixedly installed on the bidirectional threaded rod 2-6, the bidirectional threaded rod 2-6 is rotatably installed in the groove set on the installation table 2-1, the clamping plate 2-7 is slidably installed in the groove set on the installation table 2-1, the adjusting threaded member 2-9 is slidably installed in the groove set on the clamping plate 2-7, the adjusting end threaded rod 2-8 is rotatably installed in the groove set on the adjusting threaded member 2-9, the adjusting end threaded rod 2-8 is threadedly connected to the clamping plate 2-7, the adjusting threaded member 2-9 is threadedly connected to the bidirectional threaded rod 2-6, and a fixing frame 1-1 is fixedly installed on the installation table 2-1. Specific implementation method four:

[0041] Combine the following Figure 1-15 Description of this embodiment. This embodiment further describes the third embodiment. The pushing mechanism 3 includes a U-shaped frame 3-1, a lifting motor 3-2, a lifting sprocket 3-3, a lifting chain 3-4, a lifting threaded rod 3-5, and a lifting plate 3-6. The lifting motor 3-2 is fixedly installed on the U-shaped frame 3-1. The output end of the lifting motor 3-2 is fixedly installed with a lifting sprocket 3-3, and the lifting sprocket 3-3 is meshed with the lifting chain 3-4. The lifting threaded rod 3-5 is fixedly installed on the lifting sprocket 3-3. The lifting threaded rod 3-5 is rotatably installed in a groove provided on the mounting table 2-1. The lifting threaded rod 3-5 is threadedly connected with the lifting plate 3-6. The lifting plate 3-6 is slidably installed in a groove provided on the U-shaped frame 3-1. The U-shaped frame 3-1 is fixedly installed on the mounting table 2-1. Specific implementation method five:

[0043] Combine the following Figure 1-15Description of this embodiment, this embodiment further describes the fourth embodiment, the circular hole punching mechanism 4 includes a cutting motor 4-1, a driving seat plate 4-2, a circular bottom plate 4-3, a circular pipe 4-4, a limiting cylinder 4-5, a dome plate 4-6, a long cutting knife 4-7, an internal threaded tube 4-8, a rotating threaded short column 4-9, a spacing adjustment screw 4-10, a driven bevel gear 4-11, an internal motor 4-12, and a driving bevel gear 4-13. The cutting motor 4-1 is fixedly mounted on the lifting plate 3-6, and the output end of the cutting motor 4-1 is fixedly mounted with a driving seat plate 4-2, and the internal motor 4-12 is fixedly mounted in a groove set on the driving seat plate 4-2, and the output end of the internal motor 4-12 is fixedly mounted with a driving bevel gear 4-13, and the driving bevel gear 4-13 is meshed with the driven bevel gear 4-11, and the driven bevel gear 4-11 is fixedly mounted on the spacing adjustment screw 4-10, and the spacing adjustment screw 4-10 The driven bevel gear 4-11 is rotatably mounted in the groove provided on the circular bottom plate 4-3, and the internal threaded tube 4-8 is fixedly mounted on the circular bottom plate 4-3. A circular pipe 4-4 is fixedly mounted on the circular bottom plate 4-3. The limiting cylinder 4-5 is slidably mounted in the through hole provided on the circular pipe 4-4. The rotating threaded short column 4-9 is threadedly connected with the internal threaded tube 4-8. The limiting cylinder 4-5 is fixedly mounted on the dome plate 4-6. The rotating threaded short column 4-9 is rotatably mounted in the groove provided on the dome plate 4-6. The long strip cutting knife 4-7 is slidably mounted in the groove provided on the circular bottom plate 4-3. The long strip cutting knife 4-7 is threadedly connected with the spacing adjustment screw 4-10. The long strip cutting knife 4-7 is slidably mounted in the groove provided on the dome plate 4-6.

[0044] A circular hole processing device of the present invention has the following working principle:

[0045] Place the material to be processed on the installation table 2-1 and start the adjusting motor 2-3. The adjusting motor 2-3 drives the driving gear 2-2 to rotate, and the driving gear 2-2 drives the driving sprocket 2-4 to rotate. The driving sprocket 2-4 drives the bidirectional threaded rod 2-6 to rotate. The bidirectional threaded rod 2-6 is threadedly connected with the adjusting threaded member 2-9. At this time, the adjusting threaded member 2-9 drives the clamping plate 2-7 to move. When the clamping plates 2-7 on both sides move toward the middle at the same time to clamp the material, the position of the material is fixed. At the same time, the position of the hole punched by the round hole punching mechanism 4 is limited to the middle of the material.

[0046] The adjusting end threaded rod 2-8 on one side is rotated, and the adjusting end threaded rod 2-8 is threadedly connected with the clamping plate 2-7. At this time, the adjusting end threaded rod 2-8 drives the adjusting threaded member 2-9 to move upward, so that the adjusting threaded member 2-9 is disengaged from the bidirectional threaded rod 2-6. Similarly, the adjusting motor 2-3 is started to rotate the bidirectional threaded rod 2-6. Since the adjusting threaded member 2-9 on one side is disengaged from the bidirectional threaded rod 2-6, only the clamping plate 2-7 on one side moves to clamp the material. At this time, the punching position of the circular hole punching mechanism 4 changes and is no longer in the middle position, thereby achieving the purpose of punching holes at any position of the material.

[0047] The displacement threaded rod 1-6 is driven to rotate by rotating the rotating disk 1-2, and the displacement threaded rod 1-6 is threadedly connected to the top slide 1-3. At this time, the top slide 1-3 drives the hydraulic cylinder 1-4 and the extrusion pad 1-5 to move to the specified position, and the hydraulic cylinder 1-4 is started to push the extrusion pad 1-5 to extrude the material, so that the material is fixed. Different extrusion pads 1-5 extrude the material to different positions to achieve the purpose of stabilizing the material.

[0048] Start the cutting motor 4-1, which drives the seat plate 4-2 to rotate, thereby causing other parts on it to rotate, and finally causing the long cutting knife 4-7 to rotate. Start the lifting motor 3-2, which drives the lifting sprocket 3-3 to rotate, and the lifting sprocket 3-3 drives the lifting threaded rod 3-5 to rotate. The lifting threaded rod 3-5 is threadedly connected to the lifting plate 3-6. The lifting plate 3-6 rises and pushes the circular hole punching mechanism 4 to rise. During the rising process of the circular hole punching mechanism 4, the circular hole punching mechanism 4 passes through the through hole set on the mounting table 2-1, so that the rotating long cutting knife 4-7 cuts the material. The rotating threaded short column 4-9 is threadedly connected to the internal threaded tube 4-8. At this time, the rotating threaded short column 4-9 drives the dome plate 4-6 to move downward, thereby increasing the exposed length of the long cutting knife 4-7, so that thicker materials can be cut. The limiting cylinder 4-5 slides in the through hole of the circular pipe 4-4, which serves the purpose of position limitation and increased stability.

[0049] Start the internal motor 4-12, the internal motor 4-12 drives the active bevel gear 4-13 to rotate, the active bevel gear 4-13 is meshed with the driven bevel gear 4-11, the rotation of the driven bevel gear 4-11 drives the spacing adjustment screw 4-10 to rotate, the spacing adjustment screw 4-10 is threadedly connected with the long strip cutting knife 4-7, at this time the long strip cutting knife 4-7 moves, and multiple long strip cutting knives 4-7 move synchronously, so as to adjust the diameter of the cutting circular hole and achieve the purpose of cutting circular holes of different sizes.

[0050] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention also fall within the protection scope of the present invention.

Claims

1. A circular hole processing device, comprising a material positioning mechanism (1), a material limiting mechanism (2), a pushing mechanism (3) and a circular hole punching mechanism (4), characterized in that: The material positioning mechanism (1) is fixedly mounted on the material limiting mechanism (2), the pushing mechanism (3) is fixedly mounted on the material limiting mechanism (2), the round hole punching mechanism (4) is fixedly mounted on the pushing mechanism (3), and the round hole punching mechanism (4) passes through a through hole provided on the material limiting mechanism (2); The material positioning mechanism (1) comprises a fixed frame (1-1), a rotating disk (1-2), a top slide (1-3), a hydraulic cylinder (1-4), an extrusion pad (1-5), and a displacement threaded rod (1-6); the displacement threaded rod (1-6) is rotatably mounted in a groove provided on the fixed frame (1-1); the displacement threaded rod (1-6) is threadedly connected to the top slide (1-3); the top slide (1-3) is slidably mounted in a groove provided on the fixed frame (1-1); the hydraulic cylinder (1-4) is fixedly mounted on the top slide (1-3); the extrusion pad (1-5) is fixedly mounted on the output end of the hydraulic cylinder (1-4); and the rotating disk (1-2) is fixedly mounted on the displacement threaded rod (1-6); The material limiting mechanism (2) comprises a mounting table (2-1), a driving gear (2-2), an adjusting motor (2-3), a driving sprocket (2-4), a synchronous chain (2-5), a bidirectional threaded rod (2-6), a clamping plate (2-7), an adjusting end threaded rod (2-8), and an adjusting threaded member (2-9). The adjusting motor (2-3) is fixedly mounted on the mounting table (2-1). The output end of the adjusting motor (2-3) is fixedly mounted with a driving gear (2-2). The driving gear (2-2) is meshed with the driving sprocket (2-4). The driving sprocket (2-4) is meshed with the synchronous chain (2-5). The driving sprocket (2-4) is fixedly mounted with the synchronous chain (2-5). The two-way threaded rod (2-6) is fixedly mounted on the two-way threaded rod (2-6), the two-way threaded rod (2-6) is rotatably mounted in a groove provided on the mounting table (2-1), the clamping plate (2-7) is slidably mounted in a groove provided on the mounting table (2-1), the adjusting threaded member (2-9) is slidably mounted in a groove provided on the clamping plate (2-7), an adjusting end threaded rod (2-8) is rotatably mounted in the groove provided on the adjusting threaded member (2-9), the adjusting end threaded rod (2-8) is threadedly connected to the clamping plate (2-7), the adjusting threaded member (2-9) is threadedly connected to the two-way threaded rod (2-6), and a fixing frame (1-1) is fixedly mounted on the mounting table (2-1); The pushing mechanism (3) comprises a U-shaped frame (3-1), a lifting motor (3-2), a lifting sprocket (3-3), a lifting chain (3-4), a lifting threaded rod (3-5), and a lifting plate (3-6); the lifting motor (3-2) is fixedly mounted on the U-shaped frame (3-1); a lifting sprocket (3-3) is fixedly mounted on the output end of the lifting motor (3-2); the lifting sprocket (3-3) is meshed with the lifting chain (3-4); a lifting threaded rod (3-5) is fixedly mounted on the lifting sprocket (3-3); the lifting threaded rod (3-5) is rotatably mounted in a groove provided on the installation table (2-1); the lifting threaded rod (3-5) is threadedly connected to the lifting plate (3-6); the lifting plate (3-6) is slidably mounted in a groove provided on the U-shaped frame (3-1); and the U-shaped frame (3-1) is fixedly mounted on the installation table (2-1); The circular hole punching mechanism (4) comprises a cutting motor (4-1), a driving seat plate (4-2), a circular bottom plate (4-3), a circular pipe (4-4), a limiting cylinder (4-5), a dome plate (4-6), a long cutting knife (4-7), an internal threaded tube (4-8), a rotating threaded short column (4-9), a spacing adjustment screw (4-10), a driven bevel gear (4-11), an internal motor (4-12), and a driving bevel gear (4-13). The cutting motor (4-1) is fixedly mounted on the lifting plate (3-6). ), the output end of the cutting motor (4-1) is fixedly mounted with a driving seat plate (4-2), the groove provided on the driving seat plate (4-2) is fixedly mounted with an internal motor (4-12), the output end of the internal motor (4-12) is fixedly mounted with a driving bevel gear (4-13), the driving bevel gear (4-13) is meshed with a driven bevel gear (4-11), the driven bevel gear (4-11) is fixedly mounted on a spacing adjustment screw rod (4-10), and the spacing adjustment screw rod (4-10) is rotatably mounted on the round bottom plate (4- The driving seat plate (4-2) is fixedly connected with the circular bottom plate (4-3), the driving bevel gear (4-13) is rotatably mounted in the groove set on the circular bottom plate (4-3), the driven bevel gear (4-11) is rotatably mounted in the groove set on the circular bottom plate (4-3), the internal threaded tube (4-8) is fixedly mounted on the circular bottom plate (4-3), a circular pipe (4-4) is fixedly mounted on the circular bottom plate (4-3), and a limiting cylinder (4-5) is slidably mounted in a through hole set on the circular pipe (4-4). The rotating threaded short column (4-9) is threadedly connected with the internal threaded tube (4-8), the limiting cylinder (4-5) is fixedly installed on the dome plate (4-6), the rotating threaded short column (4-9) is rotatably installed in the groove provided on the dome plate (4-6), the long strip cutting knife (4-7) is slidably installed in the groove provided on the round bottom plate (4-3), the long strip cutting knife (4-7) is threadedly connected with the spacing adjustment screw rod (4-10), and the long strip cutting knife (4-7) is slidably installed in the groove provided on the dome plate (4-6).

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