Trimming device for formed hot-pressing edge covering die part

Abstract

The invention relates to the field of part machining, in particular to a trimming device for a hot-pressing edge covering die after part forming. The technical problems that an existing trimming device is difficult to trim and cut a polymer film at the same time, the flatness of the cut edge is low, and the trimming quality is affected are solved. The trimming device for the formed hot-pressing edge covering die part comprises a box body, a containing groove is formed in the box body, a machined part is placed on the containing groove of the box body, two electric push rods are fixedly connected into the box body and are symmetrically arranged, and four push wheels are fixedly connected to the bottom of the box body. The redundant polymer film of the machined part is pressed on the supporting plate through the pressing plate, the cutting knife continues to move to make contact with the redundant polymer film of the machined part, then the redundant polymer film of the machined part is cut off, and in this way, the cutting knife is used for synchronously cutting the polymer film; and redundant polymer films of a machined part can be trimmed to be smoother, and the trimming quality is improved.

Description

Technical Field

[0001] The invention relates to the field of parts processing, in particular to a device for trimming hot pressing hemming die parts after molding. Background Art

[0002] Hot pressing hemming refers to bonding a thermoplastic polymer film to a substrate by hot pressing so that the edge of the substrate will be wrapped by the thermoplastic polymer film, thereby improving the wear resistance, waterproofness, corrosion resistance and dustproofness of the substrate. However, after the hot pressing hemming treatment, some existing workpieces will have a lot of unbonded polymer film left on the inner wall of the workpiece. The edges of these excess polymer films are uneven, affecting the appearance of the workpiece. Therefore, the excess polymer film on the inner wall of the workpiece will be trimmed. However, in the process of trimming the excess polymer film on the inner wall of the workpiece, the existing trimming device is difficult to cut the polymer film at the same time, resulting in a low flatness of the cut edge of the polymer film, affecting the trimming quality. Summary of the invention

[0003] The purpose of the present invention is to solve the deficiencies of the above-mentioned prior art and provide a post-molding trimming device for hot pressing hemming mold parts that can synchronously cut polymer films, thereby trimming the polymer films more evenly and improving the trimming quality.

[0004] Technical solution: A device for trimming hot-pressing hemming mold parts after molding, comprising a box body, a placement groove is opened inside the box body, a workpiece is placed on the box body placement groove, two electric push rods are fixedly connected to the box body, the two electric push rods are symmetrically arranged, four push wheels are fixedly connected to the bottom of the box body, and the electric push rods are provided with a scraping component and a cutting component. The scraping component is used to scrape off excess polymer film on the workpiece, and the cutting component is used to cut excess polymer film on the workpiece flat.

[0005] As an improvement of the above-mentioned scheme, the scraping component includes a mounting frame, the mounting frame is fixedly connected between the telescopic rods of the two electric push rods, the mounting frame is fixedly connected to a support plate, two short scrapers and two long scrapers are slidably connected to the support plate, the two short scrapers are symmetrically arranged, the two long scrapers are symmetrically arranged, a number of pressure springs are connected between the two short scrapers and the support plates, and a number of pressure springs are connected between the two long scrapers and the support plates.

[0006] As an improvement of the above-mentioned scheme, the cutting component includes an electric hydraulic cylinder, the electric hydraulic cylinder is fixedly connected to the mounting frame, the electric hydraulic cylinder telescopic rod is fixedly connected to a pressure frame, the pressure frame and the mounting frame are slidably connected, the pressure frame is slidably connected to a pressure plate, a plurality of pressure springs are connected between the pressure plate and the pressure frame, and the pressure frame is fixedly connected to a cutting knife.

[0007] As an improvement on the above scheme, it also includes a tensioning component, which is arranged on the pressure plate and is used to tighten excess polymer film to assist the cutting component, and the tensioning component includes a rotating mounting block, and four rotating mounting blocks are fixedly connected to the pressure plate, wherein a short roller is rotatably connected between two of the rotating mounting blocks, and another short roller is rotatably connected between the other two rotating mounting blocks, wherein a long roller is rotatably connected between two of the rotating mounting blocks, and another long roller is rotatably connected between the other two rotating mounting blocks, and each of the short rollers and each of the long rollers are fixedly connected with two column gears, and a plurality of gear rods are slidably connected to the pressure frame, and a pressure spring three is connected between the gear rods and the pressure frame.

[0008] As an improvement to the above solution, the number of the column gears is consistent with the number of the gear rods.

[0009] As an improvement of the above solution, the bottoms of the short roller and the long roller and the bottom surface of the pressing plate are located on the same horizontal plane.

[0010] As an improvement of the above scheme, it also includes a cutting auxiliary component, which is arranged on the support plate and is used to further assist the cutting knife to better cut the excess polymer film on the workpiece. The cutting auxiliary component includes a sliding cutter, which is slidably connected to the support plate, and four rotating shafts are fixedly connected to the support plate, each of which is rotatably connected to a swing frame, and each of the swing frames is slidably connected to the sliding cutter, and four pressure rods are slidably connected to the support plate.

[0011] As an improvement of the above solution, the sliding cutter is located directly below the cutting knife, and the sliding cutter and the cutting knife are arranged in opposite directions.

[0012] As an improvement of the above solution, the bottom of each of the pressure rods is in contact with each of the swing frames respectively.

[0013] As an improvement on the above scheme, it also includes a telescopic mounting rod, four of the telescopic mounting rods are slidably connected to the pressure frame, two of the telescopic mounting rods located on the same side form a group, and a positioning roller is rotatably connected between the two telescopic mounting rods in each group. There are two positioning rollers in total, and each of the telescopic mounting rods is connected to the pressure frame with four pressure springs.

[0014] The present invention has the following advantages: 1. The extension of the telescopic rod of the electric hydraulic cylinder drives the pressure frame, the pressure plate and the cutting knife to move together in the direction close to the workpiece. During the movement of the pressure plate, the excess polymer film of the workpiece will be pressed on the support plate. The pressure frame continues to move, the pressure plate is supported by the support plate and cannot move. The second pressure spring is compressed, and the cutting knife continues to move and contacts with the excess polymer film of the workpiece, thereby cutting off the excess polymer film of the workpiece. In this way, the cutting knife is used to synchronously cut the polymer film, so that the excess polymer film of the workpiece can be trimmed more evenly, thereby improving the trimming quality.

[0015] 2. When the pressing frame moves toward the workpiece, the short roller and the long roller will press the excess polymer film on the workpiece together with the pressing plate. The pressing frame continues to move, and the pressing frame will drive the gear bar to move toward the workpiece. During the movement of the gear bar, it will mesh with the column gear, causing the column gear to rotate. The rotation of the column gear will respectively drive the short roller and the long roller to rotate. The rotation of the short roller and the long roller will pull the excess polymer film on the workpiece away from the pressing plate, thereby tensioning the excess polymer film on the workpiece. In this way, the excess polymer film on the workpiece can be tensioned, so that the cutting knife can better cut the polymer film and improve the flatness of the polymer film cutting.

[0016] 3. The pressing frame will squeeze the pressing rod, causing the pressing rod to move toward the workpiece, the pressing rod will squeeze one end of the swing frame, causing the swing tube to swing, and the other end of the swing frame will swing away from the workpiece. The swing frame will drive the sliding cutter to move away from the workpiece, causing the sliding cutter to extend out of the support plate and contact the polymer film, and then cut the polymer film together with the cutting knife. In this way, the cutting knife can be further assisted in cutting the polymer film, further improving the flatness of the cut edge of the polymer film. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0018] Figure 2 It is a schematic diagram of the cross-sectional three-dimensional structure of the box body of the present invention.

[0019] Figure 3 It is a schematic diagram of the local three-dimensional structure of the present invention.

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of the mounting frame and the support plate of the present invention.

[0021] Figure 5 It is a schematic diagram of the horizontal cross-sectional three-dimensional structure of the support plate of the present invention.

[0022] Figure 6 For the present invention Figure 5 Schematic diagram of the enlarged three-dimensional structure at point A in the middle.

[0023] Figure 7 It is a schematic diagram of the cross-sectional three-dimensional structure of the pressing frame of the present invention.

[0024] Figure 8 It is a three-dimensional structural schematic diagram of the cutting knife, the pressing plate and the pressure spring 2 of the present invention.

[0025] Fig. 9 It is a schematic diagram of the disassembled three-dimensional structure of the cutting component of the present invention.

[0026] Fig.10 It is a three-dimensional structural schematic diagram of the rotating mounting block, the telescopic mounting rod and the pressure spring four of the present invention.

[0027] Fig.11 It is a three-dimensional structural schematic diagram of the long roller, short roller and positioning roller of the present invention.

[0028] Fig.12 It is a three-dimensional structural schematic diagram of the gear rod and the pressure spring three of the present invention.

[0029] Fig.13 It is a schematic diagram of the disassembled three-dimensional structure of the tensioning component of the present invention.

[0030] Fig.14 It is a schematic diagram of the three-dimensional structure of the long scraper, the pressure rod and the short scraper of the present invention.

[0031] Fig.15 It is a three-dimensional structural schematic diagram of the sliding cutter and the pressure rod of the present invention.

[0032] Fig.16 For the present invention Fig.15 Schematic diagram of the enlarged three-dimensional structure at point B in the middle.

[0033] The reference numbers in the figure are: 1. box body, 2. workpiece, 3. electric push rod, 4. push wheel, 51. mounting frame, 52. support plate, 53. short scraper, 54. long scraper, 55. pressure spring one, 61. electric hydraulic cylinder, 62. pressure frame, 63. pressure plate, 64. pressure spring two, 65. cutting knife, 71. rotating mounting block, 72. short roller column, 73. long roller column, 74. column gear, 75. gear rod, 76. pressure spring three, 81. sliding cutting knife, 82. rotating shaft, 83. swing frame, 84. pressure rod, 9. telescopic mounting rod, 10. positioning roller, 11. pressure spring four. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Embodiment 1: A device for trimming hot pressing hemming die parts after forming, such as Figure 1-Figure 16 As shown, it includes a box body 1, a placement groove is opened inside the box body 1, a workpiece 2 is placed on the placement groove of the box body 1, two electric push rods 3 are connected in the box body 1 by bolts, the two electric push rods 3 are symmetrically arranged, four push wheels 4 are connected to the bottom of the box body 1 by bolts, and the electric push rods 3 are provided with a scraping component and a cutting component, the scraping component is used to scrape off the excess polymer film on the workpiece 2, and the cutting component is used to cut the excess polymer film on the workpiece 2 flat.

[0036] The scraping component includes a mounting frame 51, and the mounting frame 51 is connected between the telescopic rods of the two electric push rods 3 by bolts. A support plate 52 is connected to the mounting frame 51 by bolts. Two short scrapers 53 and two long scrapers 54 are slidably connected to the support plate 52. The two short scrapers 53 are symmetrically arranged, and the two long scrapers 54 are symmetrically arranged. The long scrapers 54 and the short scrapers 53 are used to scrape off excess polymer film. A plurality of pressure springs 55 are connected between the two short scrapers 53 and the support plate 52, and a plurality of pressure springs 55 are connected between the two long scrapers 54 and the support plate 52.

[0037] The cutting component includes an electric hydraulic cylinder 61, the electric hydraulic cylinder 61 is connected to the mounting frame 51 by bolts, a pressure frame 62 is connected to the telescopic rod of the electric hydraulic cylinder 61 by bolts, the pressure frame 62 and the mounting frame 51 are slidably connected, a pressure plate 63 is slidably connected to the pressure frame 62, a plurality of pressure springs 64 are connected between the pressure plate 63 and the pressure frame 62, a cutting knife 65 is threadedly connected to the pressure frame 62, and the cutting knife 65 is used to cut excess polymer film on the inner wall of the workpiece 2.

[0038] At first, the user places the workpiece 2 that has been heat-pressed and hemmed on the placement slot of the box body 1, and then the user manually adjusts the position of the workpiece 2. After the workpiece 2 is placed in the right position, the user starts the electric push rod 3, and the telescopic rod of the electric push rod 3 will extend. The extension of the telescopic rod of the electric push rod 3 will drive the support plate 52, the electric hydraulic cylinder 61 and the pressing frame 62 to move in the direction close to the workpiece 2. During the movement of the pressing frame 62, the long scraper 54 and the short scraper 53 will be squeezed by the workpiece 2, so that the short scraper 53 and the long scraper 54 will extend into the support plate 52, so that the pressure spring 55 is compressed, and the telescopic rod of the electric push rod 3 continues to extend, so that the support plate 52 will extend into the workpiece 2, and the support plate 52 continues to extend, so that the short scraper 53 and the long scraper 54 The short scraper 53 and the long scraper 54 will separate from the workpiece 2, and the pressure spring 55 will reset to drive the short scraper 53 and the long scraper 54 to reset. Subsequently, the telescopic rod of the electric push rod 3 will retract, and the telescopic rod of the electric push rod 3 will drive the support plate 52 to move in the opposite direction. The reverse movement of the support plate 52 will cause the short scraper 53 and the long scraper 54 to contact the workpiece 2 again. The long scraper 54 and the short scraper 53 will be squeezed by the workpiece 2 and extend into the support plate 52. The pressure spring 55 will be compressed again, and the telescopic rod of the electric push rod 3 will continue to retract. The short scraper 53 and the long scraper 54 will fit the inner wall of the workpiece 2. The movement of the support plate 52 will drive the short scraper 53 and the long scraper 54 to move together, and then the excess polymer film on the workpiece will be scraped off by the short scraper 53 and the long scraper 54, so that the excess polymer film on the workpiece 2 The extension rod of the electric hydraulic cylinder 61 will drive the pressing frame 62, the pressing plate 63 and the cutting knife 65 to move in the direction close to the workpiece 2. During the movement of the pressing plate 63, the excess polymer film of the workpiece 2 will be pressed on the supporting plate 52. The pressing frame 62 continues to move, and the pressing plate 63 is held against the supporting plate 52 and cannot move. The pressure spring 64 is compressed, and the cutting knife 65 continues to move and contacts with the excess polymer film of the workpiece 2, thereby cutting the excess polymer film of the workpiece 2. Subsequently, the extension rod of the electric hydraulic cylinder 61 retracts, and the electric hydraulic cylinder The telescopic rod 61 will drive the pressing frame 62, the pressing plate 63 and the cutting knife 65 to reset. After the pressing plate 63 and the supporting plate 52 are separated, the pressure spring 2 64 will reset and drive the pressing plate 63 to reset. Then, the telescopic rod of the electric push rod 3 will further retract. The telescopic rod of the electric push rod 3 will drive the supporting plate 52, the electric hydraulic cylinder 61 and the pressing frame 62 to reset. After the short scraper 53 and the long scraper 54 are separated from the workpiece 2, the pressure spring 1 55 will reset and drive the short scraper 53 and the long scraper 54 to reset. After the telescopic rod of the electric push rod 3 is reset, the user will take the cut workpiece out of the placement slot of the box body 1 to complete the edge trimming of the workpiece 2. In this way, the cutting knife 65 is used to synchronously cut the polymer film, so that the excess polymer film of the workpiece 2 can be trimmed more evenly.Improve trimming quality.

[0039] Embodiment 2: Based on embodiment 1, Figure 10-Figure 16 As shown, it also includes a tensioning component, which is provided on the pressing plate 63, and is used to assist the cutting component to better cut the excess polymer film on the workpiece 2. The tensioning component includes a rotating mounting block 71, and four rotating mounting blocks 71 are welded on the pressing plate 63, wherein two of the rotating mounting blocks 71 are rotatably connected with a short roller 72, and another short roller 72 is rotatably connected between the other two rotating mounting blocks 71, wherein the two rotating mounting blocks 7 1 is rotatably connected with a long roller 73, and another long roller 73 is rotatably connected between the other two rotating mounting blocks 71. The long roller 73 and the short roller 72 are used to pull the excess polymer film. Two column gears 74 are fixedly connected to each of the short rollers 72 and each of the long rollers 73. A plurality of gear rods 75 are slidably connected to the pressure frame 62. The gear rods 75 are used to drive the column gears 74 to rotate. A pressure spring three 76 is connected between the gear rods 75 and the pressure frame 62.

[0040] The number of the column gears 74 is the same as the number of the gear rods 75 .

[0041] The bottoms of the short roller 72 and the long roller 73 and the bottom surface of the pressing plate 63 are located at the same horizontal plane, so that the short roller 72, the long roller 73 and the pressing plate 63 can press the polymer film at the same time.

[0042] It also includes a cutting auxiliary component, which is provided on the support plate 52. The tensioning component is used to tighten the excess polymer film to assist the cutting component. The cutting auxiliary component includes a sliding cutter 81. The sliding cutter 81 is slidably connected to the support plate 52. Four rotating shafts 82 are welded on the support plate 52. Each of the rotating shafts 82 is rotatably connected to a swing frame 83. Each of the swing frames 83 is slidably connected to the sliding cutter 81. The swinging of the swing frame 83 will drive the sliding cutter 81 to move. Four pressure rods 84 are slidably connected to the support plate 52.

[0043] The sliding cutter 81 is located directly below the cutting knife 65 , and the sliding cutter 81 and the cutting knife 65 are arranged in opposite directions, so that the cutting edge of the polymer film can be cut more smoothly.

[0044] The bottom of each of the pressing rods 84 is in contact with each of the swing frames 83 .

[0045] When the pressing frame 62 moves toward the workpiece 2, the short roller 72 and the long roller 73 will press the excess polymer film on the workpiece 2 together with the pressing plate 63. The pressing frame 62 continues to move, and the pressing frame 62 will drive the gear rod 75 to move toward the workpiece 2. During the movement of the gear rod 75, it will mesh with the column gear 74, causing the column gear 74 to rotate. The rotation of the column gear 74 will respectively drive the short roller 72 and the long roller 73 to rotate. The rotation of the short roller 72 and the long roller will pull the excess polymer film on the workpiece 2 away from the pressing plate 63, thereby tensioning the excess polymer film on the workpiece 2. The pressing frame 62 continues to move, so that the cutting knife 65 will cut the excess polymer film on the workpiece 2, and the toothed bar 75 will contact the support plate 52. The toothed bar 75 will be squeezed by the support plate 52 and extend into the pressing frame 62, and the pressure spring three 76 will be compressed. After the cutting is completed, the pressing frame 62 moves in the opposite direction and resets. The reset of the pressing frame 62 will drive the toothed bar 75 to reset, and the reset of the pressure spring three 76 will drive the toothed bar 75 to extend out of the pressing frame 62. In this way, the excess polymer film on the workpiece 2 can be tensioned, so that the cutting knife 65 can better cut the polymer film, thereby improving the flatness of the polymer film cutting.

[0046] When the pressing frame 62 moves toward the workpiece 2 and the toothed rod 75 extends into the pressing frame 62, the pressing frame 62 will squeeze the pressing rod 84, so that the pressing rod 84 will move toward the workpiece 2, and the pressing rod 84 will squeeze one end of the swing frame 83, so that the swing tube will swing, and the other end of the swing frame 83 will swing in the direction away from the workpiece 2, and the swing frame 83 will drive the sliding cutter 81 to move in the direction away from the workpiece, so that the sliding cutter 81 will extend out of the support plate 52 and contact the polymer film, and then cut the polymer film together with the cutting knife 65. After the pressing frame 62 is reset, the pressing rod 84 is no longer squeezed by the pressing frame 62, and the sliding cutter 81 is reset under the action of gravity. The reset of the sliding cutter 81 will drive the reset of the swing frame 83, and the reset of the swing frame 83 will drive the pressing rod 84 to reset. In this way, the cutting knife 65 can be further assisted to cut the polymer film, and the flatness of the cut edge of the polymer film can be further improved.

[0047] Embodiment 3: Based on embodiment 2, Figure 10-12 As shown, it also includes a telescopic mounting rod 9, four of the telescopic mounting rods 9 are slidably connected to the pressure frame 62, two of the telescopic mounting rods 9 located on the same side form a group, and a positioning roller 10 is rotatably connected between the two telescopic mounting rods 9 in each group. There are two positioning rollers 10 in total, and the positioning rollers 10 are used to assist in positioning the workpiece 2. Each of the telescopic mounting rods 9 is connected to the pressure frame 62 with four pressure springs 11.

[0048] During the movement of the pressing frame 62 towards the workpiece 2, the positioning roller wheels 10 on both sides of the pressing frame 62 will come into contact with the workpiece 2. As the pressing frame 62 continues to move, the positioning roller wheels 10 will squeeze the workpiece 2, causing the telescopic mounting rod 9 to extend into the pressing frame 62, and the fourth compression spring 11 to be compressed. During the process of the positioning roller wheels 10 squeezing the workpiece 2, the workpiece 2 will slide in the placement groove of the box body 1 under the extrusion, so that the position of the workpiece 2 will be corrected to the processing position. During the movement of the workpiece 2, the positioning roller wheels 10 will rotate, thereby reducing the friction between the positioning roller wheels 10 and the workpiece 2. After the trimming is completed, the pressing frame 62 resets. The reset of the pressing frame 62 drives the positioning roller wheels 10 and the telescopic mounting rod 9 to reset, so that the extrusion force of the positioning roller wheels 10 on the workpiece 2 gradually decreases. The reset of the fourth compression spring 11 drives the telescopic mounting rod 9 to extend out of the pressing frame 62. In this way, the workpiece can be positioned at the processing position more quickly, improving the work efficiency.

[0049] The above-described embodiments only represent the preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations, improvements, and substitutions can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A device for trimming hot pressing hemming die parts after forming, characterized in that: The invention comprises a box body (1), wherein a placement groove is provided inside the box body (1), a workpiece (2) is placed on the placement groove of the box body (1), two electric push rods (3) are fixedly connected inside the box body (1), and the two electric push rods (3) are symmetrically arranged, and four push wheels (4) are fixedly connected to the bottom of the box body (1), and a scraping component and a cutting component are provided on the electric push rods (3), wherein the scraping component is used to scrape off excess polymer film on the workpiece (2), and the cutting component is used to cut excess polymer film on the workpiece (2) flat.

2. A device for trimming hot pressing hemming mold parts after molding as claimed in claim 1, characterized in that: The scraping component comprises a mounting frame (51), the mounting frame (51) being fixedly connected between the telescopic rods of the two electric push rods (3), a support plate (52) being fixedly connected to the mounting frame (51), two short scraping plates (53) and two long scraping plates (54) being slidably connected to the support plate (52), the two short scraping plates (53) being symmetrically arranged, the two long scraping plates (54) being symmetrically arranged, a plurality of pressure springs (55) being connected between the two short scraping plates (53) and the support plate (52), and a plurality of pressure springs (55) being connected between the two long scraping plates (54) and the support plate (52).

3. A device for trimming hot pressing hemming mold parts after molding as claimed in claim 2, characterized in that: The cutting component comprises an electric hydraulic cylinder (61), the electric hydraulic cylinder (61) is fixedly connected to the mounting frame (51), a pressing frame (62) is fixedly connected to the telescopic rod of the electric hydraulic cylinder (61), the pressing frame (62) and the mounting frame (51) are slidably connected, a pressing plate (63) is slidably connected to the pressing frame (62), a plurality of pressure springs (64) are connected between the pressing plate (63) and the pressing frame (62), and a cutting knife (65) is fixedly connected to the pressing frame (62).

4. A device for trimming hot pressing hemming die parts after forming as claimed in claim 3, characterized in that: The invention also comprises a tensioning component, wherein the tensioning component is provided on the pressure plate (63), and the tensioning component is used for tightening the excess polymer film to assist the cutting component, and the tensioning component comprises a rotating mounting block (71), and four rotating mounting blocks (71) are fixedly connected to the pressure plate (63), wherein a short roller column (72) is rotatably connected between two of the rotating mounting blocks (71), and another short roller column (72) is rotatably connected between the other two rotating mounting blocks (71), wherein a long roller column (73) is rotatably connected between two of the rotating mounting blocks (71), and another long roller column (73) is rotatably connected between the other two rotating mounting blocks (71), and each of the short roller columns (72) and each of the long roller columns (73) are fixedly connected with two column gears (74), and a plurality of gear rods (75) are slidably connected to the pressure frame (62), and a pressure spring three (76) is connected between the gear rods (75) and the pressure frame (62).

5. A device for trimming hot pressing hemming die parts after forming as claimed in claim 4, characterized in that: The number of the column gears (74) is the same as the number of the gear rods (75).

6. A device for trimming hot pressing hemming die parts after forming as claimed in claim 4, characterized in that: The bottoms of the short roller (72) and the long roller (73) and the bottom surface of the pressing plate (63) are located on the same horizontal plane.

7. A device for trimming hot pressing hemming die parts after forming as claimed in claim 4, characterized in that: The invention also comprises a cutting auxiliary component, the supporting plate (52) is provided with the cutting auxiliary component, the cutting auxiliary component is used to further assist the cutting knife (65) to better cut the excess polymer film on the workpiece (2), the cutting auxiliary component comprises a sliding cutting knife (81), the sliding cutting knife (81) is slidably connected to the supporting plate (52), four rotating shafts (82) are fixedly connected to the supporting plate (52), each of the rotating shafts (82) is rotatably connected to a swing frame (83), each of the swing frames (83) is slidably connected to the sliding cutting knife (81), and four pressure rods (84) are slidably connected to the supporting plate (52).

8. A device for trimming hot pressing hemming die parts after forming as claimed in claim 7, characterized in that: The sliding cutting knife (81) is located directly below the cutting knife (65), and the sliding cutting knife (81) and the cutting knife (65) are arranged in opposite directions.

9. A device for trimming hot pressing hemming die parts after forming as claimed in claim 7, characterized in that: The bottom of each of the pressure rods (84) is in contact with each of the swing frames (83) respectively.

10. A device for trimming hot pressing hemming die parts after molding as claimed in claim 7, characterized in that: It also includes a telescopic mounting rod (9), four of the telescopic mounting rods (9) are slidably connected to the pressure frame (62), two of the telescopic mounting rods (9) located on the same side form a group, and a positioning roller (10) is rotatably connected between the two telescopic mounting rods (9) in each group. There are two positioning rollers (10) in total, and each of the telescopic mounting rods (9) is connected to the pressure frame (62) by four pressure springs (11).

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