Automobile cover plate cladding layer positioning and cutting device

Abstract

The application relates to the technical field of automobile film covering, and discloses a positioning and cutting device for an automobile cover plate coating layer, which comprises a bottom plate and a short guide column, the short guide column is fixedly connected to the upper surface of the bottom plate, one side of the upper surface of the bottom plate is provided with a lifting driving mechanism, one side of the lifting driving mechanism is provided with a covering and cutting mechanism, the lower portion of the covering and cutting mechanism is provided with a covering and supporting mechanism, the middle portion of the covering and supporting mechanism is provided with an electromagnetic fixing mechanism, and the lower portion of the covering and supporting mechanism is provided with a cover plate positioning and assisting mechanism. The positioning and cutting device for the automobile cover plate coating layer can form covering protection for the internal protective film of the automobile cover plate surface through the covering and cutting mechanism and the covering and supporting mechanism when the edge protective film is cut, the part of the cover plate surface adhered is prevented from being scratched when the edge protective film is cut off, and the cutting quality is improved.

Description

Technical Field

[0001] This invention relates to the field of automotive coating technology, specifically to a positioning and cutting device for automotive cover plate coating layers. Background Technology

[0002] Automotive wrapping is a technology that involves covering the surface of a car with a protective film. This technology can protect the car's surface from scratches, wear, ultraviolet rays, and other factors, while also changing the car's appearance to make it more personalized. The principle of automotive wrapping is to cover the car's surface with a thin film, which can be made of materials such as polyurethane, polyurethane elastomer, rigid polyurethane film, or flexible polyurethane film. These materials have excellent wear resistance, UV resistance, high temperature resistance, and chemical corrosion resistance, effectively protecting the car's surface.

[0003] In the production process of automotive cover plates, a protective film needs to be coated on their outer surface. Generally, during the coating process, the protective film is first pasted onto the surface of the cover plate, and then the edge of the protective film is manually cut along the edge line of the cover plate. However, during the cutting process, the part of the protective film that has been pasted on is exposed on the surface, which can easily scratch the part of the cover plate surface that is pasted on when the edge protective film is cut. Therefore, an automotive cover plate coating layer positioning and cutting device is needed so that it can cover and protect the inner protective film when cutting the edge protective film, avoid scratching the part of the cover plate surface that is pasted on when the edge protective film is cut, and improve the cutting quality. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a positioning and cutting device for automotive cover layer, which solves the problems mentioned in the background.

[0005] The present invention provides the following technical solution: a positioning and cutting device for a car cover plate covering layer, comprising: a base plate and a short guide post, the short guide post being fixedly connected to the upper surface of the base plate, a lifting drive mechanism being provided on one side of the upper surface of the base plate, a cover cutting mechanism being provided on one side of the lifting drive mechanism, a cover support mechanism being provided below the cover cutting mechanism, an electromagnetic fixing mechanism being provided in the middle of the cover support mechanism, and a cover plate positioning auxiliary mechanism being provided below the cover support mechanism.

[0006] Preferably, the lifting drive mechanism includes a motor, a threaded column, a long guide column, a threaded cylinder, a limit connecting plate, an upper limit switch, and a lower limit switch. The motor is fixedly installed on one side of the upper surface of the base plate. The threaded column is fixedly connected to the output end of the motor via a coupling. The long guide column is fixedly inserted into the upper surface of the base plate. The threaded cylinder is threadedly connected to the outer wall of the threaded column. The limit connecting plate is fixedly connected to the outer wall of the long guide column at the end away from the base plate, and the limit connecting plate is rotatably connected to the end of the threaded column away from the motor via a bearing. The upper limit switch and the lower limit switch are both fixedly installed on the outer wall of the long guide column, and both the upper limit switch and the lower limit switch are electrically connected to the motor.

[0007] Preferably, the covering cutting mechanism includes a sliding connecting plate, a sliding column, a nickel plate, a spring, a covering pressure plate, a first upper buffer pad, and a second upper buffer pad. The sliding connecting plate is fixedly connected to the outer wall of the threaded cylinder. The upper limit switch is located above the sliding connecting plate, and the lower limit switch is located below the sliding connecting plate. The sliding column is movably disposed inside the sliding connecting plate, and a limit block is provided at the top of the sliding column. The nickel plate is fixedly connected to the bottom end of the sliding column. The spring is movably sleeved on the outer wall of the sliding column, and one end of the spring is movably connected to the lower surface of the sliding connecting plate, and the other end of the spring is movably connected to the upper surface of the nickel plate. The covering pressure plate is fixedly sleeved on the outer wall of the nickel plate. The first upper buffer pad is fixedly attached to the lower surface of the covering pressure plate, and the second upper buffer pad is fixedly attached to the lower surface of the nickel plate.

[0008] Preferably, the covering cutting mechanism further includes a mounting plate, a first slip ring, a sliding hole, a limiting collar, a pin, and a cutting head. The mounting plate is fixedly connected to the lower surface of the sliding connecting plate. The first slip ring is fixedly connected to the inner wall of the mounting plate, and the inner wall of the first slip ring is slidably connected to the outer wall of the sliding column. The sliding hole is opened through both sides of the sliding connecting plate, and the sliding connecting plate is slidably connected to the sliding column and the long guide column respectively through the sliding hole. The limiting collar is disposed on the outer wall of the mounting plate. The pin is fixedly inserted into the inner wall of the mounting plate, and the mounting plate is fixedly connected to the limiting collar through the pin. The cutting head is fixedly installed between the limiting collar and the mounting plate.

[0009] Preferably, the cutting head includes a bent cutting head and an arc-shaped cutting head, with two bent cutting heads and two arc-shaped cutting heads each. The two bent cutting heads and the two arc-shaped cutting heads are respectively arranged around the mounting plate, and the surface of the cutting head is slidably connected to the outer wall of the covering plate.

[0010] Preferably, the covering support mechanism includes a support plate, a first lower buffer pad, and an installation port. The support plate is fixedly connected to the top of the short guide post, the first lower buffer pad is fixedly attached to the upper surface of the support plate, and the installation port is opened through both sides of the support plate.

[0011] Preferably, the electromagnetic fixing mechanism includes an electromagnet and a second lower buffer pad. The electromagnet is fixedly installed inside the mounting opening, and the second lower buffer pad is fixedly attached to the upper surface of the electromagnet. The shape and size of the electromagnet match the shape and size of the nickel plate.

[0012] Preferably, the upper surface of the first lower buffer pad is provided with a convex arc surface, the upper surface of the first upper buffer pad is provided with a concave arc surface, and the first upper buffer pad, the second upper buffer pad, the first lower buffer pad and the second lower buffer pad are all rubber buffer pads.

[0013] Preferably, the cover plate positioning auxiliary mechanism includes a template, a mold groove, side grooves, and a passage opening. The template is movably disposed below the support plate, the mold groove is formed on the upper surface of the template, the side grooves are formed on both sides of the template, and the passage opening is formed through the surface of the template.

[0014] Preferably, the cover plate positioning auxiliary mechanism further includes a tension spring, a second slip ring, and a hydraulic cylinder. The tension spring is fixedly connected between the template and the base plate, the second slip ring is fixedly connected to the inner wall of the template, and the template is slidably connected to the short guide post through the second slip ring. The hydraulic cylinder is fixedly installed between the template and the base plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This automotive cover plate covering layer positioning and cutting device, through the configuration of a base plate, short guide pillars, lifting drive mechanism, covering cutting mechanism, covering support mechanism, electromagnetic fixing mechanism, and cover plate positioning auxiliary mechanism, can cover and protect the internal protective film on the surface of the automotive cover plate when cutting the edge protective film. This avoids scratching the part of the cover plate surface that is attached when cutting the edge protective film, thus improving the cutting quality.

[0017] The car cover plate positioning and cutting device, through the setting of sliding connecting plate, sliding column, nickel plate, spring, cover plate, first upper buffer pad and second upper buffer pad, can form a film covering and fixing on the surface of the car cover plate in advance by the cover plate after the car cover plate is positioned and before the cutting head cuts, so as to avoid the car cover plate from shifting during cutting.

[0018] This car cover plate covering layer positioning and cutting device, through the setting of template, mold groove, side groove and through port, can limit the car cover plate through the mold groove before the cutting head cuts, ensuring that the covering plate forms an accurate positioning of the car cover plate, thereby avoiding the cutting head cutting the surface of the car cover plate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the positional structure at the location where the car cover is cut during film cutting according to the present invention;

[0021] Figure 3 This is a rear view of the present invention;

[0022] Figure 4 This is a schematic diagram of the exploded structure of the present invention;

[0023] Figure 5 This is an exploded view of the covering cutting mechanism of the present invention;

[0024] Figure 6 This is a schematic diagram of the exploded structure of the cover support mechanism of the present invention.

[0025] In the diagram: 1. Base plate; 2. Short guide post; 301. Motor; 302. Threaded post; 303. Long guide post; 304. Threaded cylinder; 305. Limit connecting plate; 306. Upper limit switch; 307. Lower limit switch; 401. Sliding connecting plate; 402. Sliding post; 403. Nickel plate; 404. Spring; 405. Covering pressure plate; 406. First upper buffer pad; 407. Second upper buffer pad; 408. Anchor. Mounting plate; 409, First slip ring; 410, Sliding hole; 411, Limiting collar; 412, Pin; 413, Cutting head; 501, Support plate; 502, First lower buffer pad; 503, Mounting port; 601, Electromagnet; 602, Second lower buffer pad; 701, Template; 702, Mold groove; 703, Side groove; 704, Through port; 705, Tension spring; 706, Second slip ring; 707, Hydraulic cylinder. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Please see Figure 1-6A positioning and cutting device for the coating layer of an automotive cover includes: a base plate 1 and short guide posts 2. The short guide posts 2 are fixedly connected to the upper surface of the base plate 1. A lifting drive mechanism is provided on one side of the upper surface of the base plate 1, a covering cutting mechanism is provided on one side of the lifting drive mechanism, a covering support mechanism is provided below the covering cutting mechanism, an electromagnetic fixing mechanism is provided in the middle of the covering support mechanism, and a cover positioning auxiliary mechanism is provided below the covering support mechanism. By using the base plate 1, short guide posts 2, lifting drive mechanism, covering cutting mechanism, covering support mechanism, electromagnetic fixing mechanism, and cover positioning auxiliary mechanism, the covering cutting mechanism and covering support mechanism can form a covering protection for the internal protective film on the surface of the automotive cover when cutting the edge protective film, avoiding scratches on the part of the cover surface that is attached when cutting the edge protective film, thus improving the cutting quality.

[0028] The lifting drive mechanism includes a motor 301, a threaded column 302, a long guide column 303, a threaded cylinder 304, a limit connecting plate 305, an upper limit switch 306, and a lower limit switch 307. The motor 301 is fixedly installed on one side of the upper surface of the base plate 1. The threaded column 302 is fixedly connected to the output end of the motor 301 via a coupling. The long guide column 303 is fixedly inserted into the upper surface of the base plate 1. The threaded cylinder 304 is threadedly connected to the outer wall of the threaded column 302. The limit connecting plate 305 is fixedly connected to the long guide column 303 away from the base plate. The outer wall of one end is connected to the limit connecting plate 305 via a bearing and the end of the threaded column 302 away from the motor 301. The upper limit switch 306 and the lower limit switch 307 are both fixedly installed on the outer wall of the long guide column 303. The upper limit switch 306 and the lower limit switch 307 are both electrically connected to the motor 301 so that the sliding connecting plate 401 can be raised and lowered by the rotation of the threaded column 302. The low-speed lifting and lowering is formed by the threaded column 302, which ensures that the hydraulic cylinder 707 can retract in time before the cutting head 413 cuts.

[0029] The covering cutting mechanism includes a sliding connecting plate 401, a sliding column 402, a nickel plate 403, a spring 404, a covering pressure plate 405, a first upper buffer pad 406, and a second upper buffer pad 407. The sliding connecting plate 401 is fixedly connected to the outer wall of the threaded cylinder 304. The upper limit switch 306 is located above the sliding connecting plate 401, and the lower limit switch 307 is located below the sliding connecting plate 401. The sliding column 402 is movably disposed inside the sliding connecting plate 401, and a limit block is provided at the top of the sliding column 402. The nickel plate 403 is fixedly connected to the bottom end of the sliding column 402. The spring 404 is movably sleeved on the outer wall of the sliding column 402, and one end of the spring 404 is connected to the sliding connecting plate 401. The lower surface is movably connected, and the other end of the spring 404 is movably connected to the upper surface of the nickel plate 403. The cover plate 405 is fixedly sleeved on the outer wall of the nickel plate 403. The first upper buffer pad 406 is fixedly attached to the lower surface of the cover plate 405, and the second upper buffer pad 407 is fixedly attached to the lower surface of the nickel plate 403. Through the provided sliding connecting plate 401, sliding column 402, nickel plate 403, spring 404, cover plate 405, first upper buffer pad 406 and second upper buffer pad 407, the cover plate 405 can cover and fix the surface film of the car cover in advance after the car cover is positioned and before the cutting head 413 cuts, so as to avoid the car cover from shifting during cutting.

[0030] The covering cutting mechanism also includes a mounting plate 408, a first slip ring 409, a sliding hole 410, a limiting collar 411, a pin 412, and a cutting head 413. The mounting plate 408 is fixedly connected to the lower surface of the sliding connecting plate 401. The first slip ring 409 is fixedly connected to the inner wall of the mounting plate 408, and the inner wall of the first slip ring 409 is slidably connected to the outer wall of the sliding column 402. The sliding hole 410 is formed through both sides of the sliding connecting plate 401 and is slidably connected. Plate 401 is slidably connected to sliding post 402 and long guide post 303 respectively through sliding hole 410. Limiting collar 411 is set on the outer wall of mounting plate 408. Pin 412 is fixedly inserted into the inner wall of mounting plate 408, and mounting plate 408 is fixedly connected to limiting collar 411 through pin 412. Cutting head 413 is fixedly installed between limiting collar 411 and mounting plate 408 so that the cutting head 413 can cut the edge of the coating film.

[0031] The cutting head 413 includes a bent cutting head and an arc-shaped cutting head. There are two bent cutting heads and two arc-shaped cutting heads. The two bent cutting heads and the two arc-shaped cutting heads are respectively arranged around the mounting plate 408. The surface of the cutting head 413 is slidably connected to the outer wall of the cover plate 405 to avoid the cutting head 413 from cutting the covering film on the surface of the car cover.

[0032] The covering support mechanism includes a support plate 501, a first lower buffer pad 502, and an installation port 503. The support plate 501 is fixedly connected to the top of the short guide post 2. The first lower buffer pad 502 is fixedly attached to the upper surface of the support plate 501. The installation port 503 is opened through both sides of the support plate 501 to form stable support and bottom buffer for the car cover.

[0033] The electromagnetic fixing mechanism includes an electromagnet 601 and a second lower buffer pad 602. The electromagnet 601 is fixedly installed inside the mounting opening 503, and the second lower buffer pad 602 is fixedly attached to the upper surface of the electromagnet 601. The shape and size of the electromagnet 601 are matched with the shape and size of the nickel plate 403, so as to provide auxiliary fixing when the pressure of the cover plate 405 is insufficient when it just contacts the car cover, ensuring that the car cover will not easily shift after the template 701 is removed.

[0034] The upper surface of the first lower buffer pad 502 is provided with a convex arc surface, and the upper surface of the first upper buffer pad 406 is provided with a concave arc surface. The first upper buffer pad 406, the second upper buffer pad 407, the first lower buffer pad 502 and the second lower buffer pad 602 are all rubber buffer pads so as to match the upper and lower surfaces of the car cover and avoid the covering film from being easily scratched.

[0035] The cover plate positioning auxiliary mechanism includes a template 701, a mold groove 702, a side groove 703, and a passage 704. The template 701 is movably disposed below the support plate 501. The mold groove 702 is formed on the upper surface of the template 701, the side groove 703 is formed on both sides of the template 701, and the passage 704 is formed through the surface of the template 701. The template 701, mold groove 702, side groove 703, and passage 704 are configured to limit the car cover plate through the mold groove 702 before the cutting head 413 cuts, ensuring that the cover plate 405 accurately positions the car cover plate, thereby preventing the cutting head 413 from cutting the surface of the car cover plate.

[0036] The cover plate positioning auxiliary mechanism also includes a tension spring 705, a second slip ring 706, and a hydraulic cylinder 707. The tension spring 705 is fixedly connected between the template 701 and the base plate 1. The second slip ring 706 is fixedly connected to the inner wall of the template 701, and the template 701 is slidably connected to the short guide post 2 through the second slip ring 706. The hydraulic cylinder 707 is fixedly installed between the template 701 and the base plate 1 so that the template 701 can be driven to rise through the hydraulic cylinder 707 to ensure the positioning of the cover plate 405, and to drive the template 701 to fall before the cutting head 413 cuts to avoid the cutting head 413 hitting the blade.

[0037] Working principle: In use, firstly, the hydraulic cylinder 707 is activated, pushing the template 701 upward along the short guide post 2 until the support plate 501 is embedded in the mold groove 702. Then, the car cover plate with the film is placed on the upper surface of the first lower buffer pad 502, ensuring that the car cover plate is embedded in the mold groove 702. Then, the motor 301 is activated, and the electromagnet 601 is energized. The motor 301 drives the threaded post 302 to rotate forward. When the threaded post 302 rotates, it pushes the threaded cylinder 304, causing the sliding connecting plate 401 to descend. When the sliding connecting plate 401 descends, the covering pressure plate 405 and the mounting plate 408 descend synchronously. The second upper buffer pad 407 below the covering pressure plate 405 first contacts the car cover plate. After the second upper buffer pad 407 contacts the car cover plate, the nickel plate 403 is magnetically driven by the electromagnet 601. The pressure of the spring 404, combined with the pressure of the spring 404, forms the covering plate 405 and the support plate 501 to fix the car cover. Then, the hydraulic cylinder 707 is immediately activated. The hydraulic cylinder 707 drives its output end to retract, pushing the template 701 down along the short guide post 2 to the end position. At the same time, the cutting head 413 continues to descend and cuts the covering film on the edge of the car cover after the template 701 descends. This continues until the lower limit switch 307 is pressed by the sliding connecting plate 401, the motor 301 reverses, the electromagnet 601 is de-energized, the motor 301 drives the threaded column 302 to reverse, and when the threaded column 302 rotates, it pushes the threaded cylinder 304 to make the sliding connecting plate 401 rise, thereby making the covering plate 405 gradually rise and loosen until the upper limit switch 306 is pressed by the sliding connecting plate 401, and the motor 301 stops.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automotive deck covering layer positioning and cutting apparatus, characterized by, Include: The bottom plate (1) and the short guide column (2) are fixedly connected on the upper surface of the bottom plate (1), one side of the upper surface of the bottom plate (1) is provided with a lifting drive mechanism, one side of the lifting drive mechanism is provided with a covering cutting mechanism, the lower side of the covering cutting mechanism is provided with a covering support mechanism, the middle of the covering support mechanism is provided with an electromagnetic fixing mechanism, and the lower side of the covering support mechanism is provided with a cover positioning auxiliary mechanism; The lifting drive mechanism comprises a motor (301), a threaded column (302), a long guide column (303), a threaded cylinder (304), a limiting connecting plate (305), an upper limiting switch (306) and a lower limiting switch (307), the motor (301) is fixedly installed on one side of the upper surface of the bottom plate (1), the threaded column (302) is fixedly connected to the output end of the motor (301) through a shaft coupling, the long guide column (303) is fixedly inserted into the upper surface of the bottom plate (1), the threaded cylinder (304) is threadedly connected to the outer wall of the threaded column (302), the limiting connecting plate (305) is fixedly connected to the outer wall of the long guide column (303) away from the bottom plate (1), and the limiting connecting plate (305) is rotatably connected to the end of the threaded column (302) away from the motor (301) through a bearing, the upper limiting switch (306) and the lower limiting switch (307) are both fixedly installed on the outer wall of the long guide column (303), and the upper limiting switch (306) and the lower limiting switch (307) are both electrically connected with the motor (301); The covering cutting mechanism comprises a sliding connecting plate (401), a sliding column (402), a nickel plate (403), a spring (404), a covering pressing plate (405), a first upper buffer pad (406) and a second upper buffer pad (407), the sliding connecting plate (401) is fixedly connected to the outer wall of the threaded cylinder (304), the upper limiting switch (306) is located above the sliding connecting plate (401), the lower limiting switch (307) is located below the sliding connecting plate (401), the sliding column (402) is movably arranged in the sliding connecting plate (401), and the top end of the sliding column (402) is provided with a limiting block, the nickel plate (403) is fixedly connected to the bottom end of the sliding column (402), the spring (404) is movably sleeved on the outer wall of the sliding column (402), one end of the spring (404) is movably connected with the lower surface of the sliding connecting plate (401), the other end of the spring (404) is movably connected with the upper surface of the nickel plate (403), the covering pressing plate (405) is fixedly sleeved on the outer wall of the nickel plate (403), the first upper buffer pad (406) is fixedly attached to the lower surface of the covering pressing plate (405), and the second upper buffer pad (407) is fixedly attached to the lower surface of the nickel plate (403). The covering cutting mechanism further comprises a mounting plate (408), a first sliding ring (409), a sliding hole (410), a limiting sleeve ring (411), a bolt (412) and a cutting tool bit (413), the mounting plate (408) is fixedly connected to the lower surface of the sliding connecting plate (401), the first sliding ring (409) is fixedly connected to the inner wall of the mounting plate (408), and the inner wall of the first sliding ring (409) is in sliding connection with the outer wall of the sliding column (402), the sliding hole (410) is formed through the two sides of the sliding connecting plate (401), and the sliding connecting plate (401) is in sliding connection with the sliding column (402) and the long guide column (303) through the sliding hole (410), the limiting sleeve ring (411) is arranged on the outer wall of the mounting plate (408), the bolt (412) is fixedly inserted into the inner wall of the mounting plate (408), and the mounting plate (408) is fixedly connected with the limiting sleeve ring (411) through the bolt (412), and the cutting tool bit (413) is fixedly installed between the limiting sleeve ring (411) and the mounting plate (408).

2. The device according to claim 1, wherein, The cutting tool bit (413) comprises two bending tool bits and two arc-shaped tool bits, the bending tool bits and the arc-shaped tool bits are arranged around the mounting plate (408), and the surface of the cutting tool bit (413) is in sliding connection with the outer wall of the covering pressing plate (405).

3. The device according to claim 1, wherein, The covering supporting mechanism comprises a supporting plate (501), a first lower buffer pad (502) and a mounting port (503), the supporting plate (501) is fixedly connected to the top end of the short guide column (2), the first lower buffer pad (502) is fixedly attached to the upper surface of the supporting plate (501), and the mounting port (503) is formed through the two sides of the supporting plate (501).

4. The device according to claim 3, wherein, The electromagnetic fixing mechanism comprises an electromagnet (601) and a second lower buffer pad (602), the electromagnet (601) is fixedly installed in the mounting port (503), and the second lower buffer pad (602) is fixedly attached to the upper surface of the electromagnet (601), and the shape and size of the electromagnet (601) are matched with those of the nickel plate (403).

5. The device according to claim 3, wherein, The upper surface of the first lower buffer pad (502) is provided with a convex arc surface, the upper surface of the first upper buffer pad (406) is provided with a concave arc surface, and the first upper buffer pad (406), the second upper buffer pad (407), the first lower buffer pad (502) and the second lower buffer pad (602) are all rubber buffer pads.

6. The device according to claim 3, wherein, The cover plate positioning auxiliary mechanism comprises a template (701), a template groove (702), a side groove (703) and a passing port (704), the template (701) is movably arranged below the supporting plate (501), the template groove (702) is formed in the upper surface of the template (701), the side groove (703) is formed in the two sides of the template (701), and the passing port (704) is formed through the surface of the template (701).

7. The device according to claim 6, wherein, The cover positioning auxiliary mechanism further comprises a tension spring (705), a second sliding ring (706) and a hydraulic cylinder (707), the tension spring (705) is fixedly connected between the template (701) and the bottom plate (1), the second sliding ring (706) is fixedly connected to the inner wall of the template (701), and the template (701) is slidably connected with the short guide column (2) through the second sliding ring (706), and the hydraulic cylinder (707) is fixedly installed between the template (701) and the bottom plate (1).

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