Cutting device for front wall sound insulation pad of new energy automobile and cutting method of cutting device

Abstract

The invention discloses a cutting device for a front wall sound insulation pad of a new energy automobile and a cutting method of the cutting device, and relates to the technical field of sound insulation pad cutting. The cutting device for the front wall sound insulation pad of the new energy automobile comprises a cutting base, a cutting groove penetrating up and down is formed in the upper surface of the cutting base, and a cutting assembly is arranged above the cutting base; the automobile front wall sound insulation pad cutting device comprises a cutting base, a cutting assembly is arranged at the lower end of the cutting base, a fixing assembly is arranged at the lower end of the cutting assembly, a supporting assembly is arranged at the top end of the cutting assembly, a waste box is arranged at the lower end of the cutting base in a hot melting mode, a material receiving cavity is formed in the waste box, and the upper end of the material receiving cavity is in an opening form and communicates with a cutting groove. According to the technical scheme, transverse moving cutting is carried out through a cutting knife, the thicknesses of different positions of the sound insulation pad are different, materials cannot be evenly distributed, and after the cutting knife is pressed downwards, the problems that the peripheral pressing degrees are different, cutting is carried out through the cutting knife, and the cutting section is uneven easily occur are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of cutting sound insulation pads, and in particular to a cutting device and a cutting method for a sound insulation pad for a front enclosure of a new energy vehicle. Background Art

[0002] The front sound insulation pad of new energy vehicles is a sound insulation material designed specifically for improving the driving comfort of the car. It has multiple functions such as noise reduction, reducing body vibration, optimizing sound quality, blocking heat, protecting the body paint and ensuring the body sealing. The entire sound insulation pad needs to be cut during production.

[0003] For example, the Chinese authorized patent with announcement number CN221539979U (a high-temperature resistant automobile sound insulation pad processing and cutting device): includes a base, an operating table, a cutting component and a positioning component. The upper surface of the base is provided with an operating table and a cutting component. The positioning components are symmetrically arranged on both sides of the operating table to position the sound insulation pad; the positioning component includes a slide rail, a plug column, a card strip, a plug, a shell, a spring, a connecting block, a torsion spring, a pressing block and a friction pad; by arranging a positioning component between the base and the operating table, the sound insulation pad can be quickly tightened only by pressing the connecting block and the slide rail, which saves adjustment time to a certain extent and makes the operation more convenient and quick, and the pressing position can be adjusted by rotating the connecting block, thereby improving the overall versatility and adaptability of the device.

[0004] When cutting the existing automobile front wall sound insulation pad, the cutting knife is used to move horizontally and cut in one go. The thickness of the sound insulation pad is different at different positions, and the material distribution is not very uniform. After the cutting knife is pressed down, the degree of pressure around it is likely to be different. Cutting in one go is likely to result in an uneven cutting cross-section. For this reason, we provide a cutting device and a cutting method for the front wall sound insulation pad of a new energy vehicle. Summary of the invention

[0005] The purpose of the present invention is to provide a cutting device and a cutting method for a new energy vehicle front enclosure sound insulation pad, so as to solve the problem that the existing automobile front enclosure sound insulation pad is cut by a cutting knife that moves horizontally in one go, the thickness of the sound insulation pad is different at different positions, and the material distribution is not very uniform. After the cutting knife is pressed down, the degree of downward pressure around it is likely to be different, and the cutting cross-section is likely to be uneven if it is cut in one go.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a cutting device for a front wall sound insulation pad of a new energy vehicle, comprising a cutting base, the upper surface of the cutting base is provided with a cutting groove running through from top to bottom, a cutting assembly is provided above the cutting base, a fixing assembly is provided at the lower end of the cutting assembly, a supporting assembly is provided at the top of the cutting assembly, a waste box is hot-melted at the lower end of the cutting base, a material receiving cavity is provided inside the waste box, the upper end of the material receiving cavity is in an open form, and is communicated with the cutting groove.

[0007] Preferably, the cutting assembly includes a first movable part and a second movable part, the second movable part drives the first movable part to move through a connecting seat, the first movable part and the second movable part both include a slide rail mounting sleeve and a ball screw slide rail, and the ball screw slide rail is installed inside the slide rail mounting sleeve.

[0008] Preferably, the ball screw slide rail of the first movable part is connected with a protective sleeve, the interior of the protective sleeve is provided with an installation cavity which passes through from top to bottom, the top end of the protective sleeve is externally bolted with a cover plate, the interior of the installation cavity is provided with a first cutting knife, a second cutting knife is provided on one side of the first cutting knife, a third cutting knife is provided on one side of the second cutting knife, a fourth cutting knife is provided on one side of the third cutting knife, the first cutting knife, the second cutting knife, the third cutting knife and the fourth cutting knife are fixed to a fixing plate by screws, and a cylinder is provided at the upper end of the fixing plate.

[0009] Preferably, a cylinder mounting frame is provided on the outside of the cylinder, four cylinders are provided, and the cylinder mounting frame is welded and fixed to the inner wall of the mounting cavity, the cylinder is fixed to the cylinder mounting frame by a single-head fastener, and the front surface of the protective sleeve is provided with air holes.

[0010] Preferably, the fixing assembly includes a fixing frame and a connecting plate, and the connecting plate is fixed to the fixing frame by hot melt, the connecting plate is connected to the first movable part through an electric push rod, a frame groove is provided at the center of the fixing frame, and fixed bottom plates are provided on the lower surfaces of both sides of the fixing frame.

[0011] Preferably, the support assembly includes a rear support frame, a stabilizing top frame is welded to the top end of the rear support frame, and one end of the stabilizing top frame is welded and fixed to the slide rail mounting sleeve of the second movable part.

[0012] Preferably, the support assembly also includes a first side frame and a second side frame, and the two ends of the rear support frame are respectively fixed to the first side frame and the second side frame by external bolts of a connecting plate, and a limited position seat is provided on one side of the first side frame and the second side frame and the front surface of the rear support frame.

[0013] Preferably, the upper surfaces of the first side frame and the second side frame are both provided with directional slide grooves, and the lower ends of both ends of the slide rail mounting sleeve of the first movable part are both provided with directional wheels, and the directional wheels move along the directional slide grooves.

[0014] Preferably, a cleaning opening is provided on the front surface of the waste box, and the cleaning opening is communicated with the material receiving cavity, and the interior of the cleaning opening is sealed by an opening plate.

[0015] Preferably, a cutting method for a cutting device for a front wall sound insulation pad of a new energy vehicle comprises the following steps: Step 1: Place the sound insulation pad on the cutting base, arrange it neatly, start the ball screw guide rail of the second moving part to drive the first moving part to move, adjust the positions of the first cutting knife, the second cutting knife, the third cutting knife and the fourth cutting knife, start the ball screw guide rail of the first moving part to drive the protective cover to the rightmost end; Step 2: After the adjustment, start the electric push rod to drive the fixed bottom plate to press down the sound insulation pad, start the four cylinders to drive the first cutting knife, the second cutting knife, the third cutting knife and the fourth cutting knife to move down respectively, and the bottom surfaces of the first cutting knife, the second cutting knife, the third cutting knife and the fourth cutting knife to move down are lowered in turn; Step 3: Then start the ball screw guide rail of the first moving part again, drive the first cutting knife, the second cutting knife, the third cutting knife and the fourth cutting knife to move from right to left to cut the sound insulation pad. After the cutting is completed, the first cutting knife, the second cutting knife, the third cutting knife and the fourth cutting knife return to the initial position, and the fixed bottom plate also returns to the initial position; Step 4: Then start the ball screw guide rail of the second moving part again to drive the first moving part to move to the next cutting position, and then use the fixed bottom plate to fix the sound insulation pad, and then use the first cutting knife, the second cutting knife, the third cutting knife and the fourth cutting knife to cut the sound insulation pad in turn, and repeat the operation in this way; Step 5: When there is too much waste material inside the receiving cavity, pull out the opening plate, take out the waste material from the cleaning opening, and then reinsert the opening plate to seal it.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention arranges a first cutting knife, a second cutting knife, a third cutting knife and a fourth cutting knife in a protective sleeve. The first cutting knife, the second cutting knife, the third cutting knife and the fourth cutting knife are moved by a cylinder respectively, and the fixed heights of the four cylinders are lowered equidistantly from left to right in sequence, so that the lowest ends of the first cutting knife, the second cutting knife, the third cutting knife and the fourth cutting knife are lowered in sequence. The first cutting knife, the second cutting knife, the third cutting knife and the fourth cutting knife are driven to move from right to left by the ball screw guide rail of the first moving part. The first cutting knife contacts the sound insulation pad first, followed by the second cutting knife, the third cutting knife and the fourth cutting knife in sequence. The third cutting knife and the fourth cutting knife have different heights, so when cutting, the contact with the pad has an effect of deepening the cutting depth in sequence, rather than cutting directly to the bottom. In this way, the downward pressure depth is low, the downward pressure on the sound insulation pad is low, and the movement resistance is also low. It is not easy to cause uneven cutting due to thickness and uniform material distribution, which improves the uniformity of cutting the front sound insulation pad of new energy vehicles. It solves the problem that when cutting the existing front sound insulation pad of a car, the cutting knife is used to move horizontally in one breath, and the thickness of the sound insulation pad at different positions is different, and the material distribution is not very uniform. After the cutting knife is pressed down, it is easy to have different downward pressure degrees around, and cutting in one breath is easy to have an uneven cutting section.

[0017] (2) By respectively arranging the first side frame and the second side frame at both ends of the rear support frame, the upper surfaces of the first side frame and the second side frame are both provided with directional slide grooves. When the first movable part moves, the two ends of the slide rail mounting sleeve of the first movable part move along the directional slide grooves through the directional wheels, which play a supporting effect on the first movable part, thereby improving the movement stability of the first movable part, thereby improving the cutting stability of the first cutting knife, the second cutting knife, the third cutting knife and the fourth cutting knife, which are not easily obstructed and shaken, thereby improving the smoothness of cutting.

[0018] (3) By setting a fixing component at the lower end of the cutting component, the protective sleeve moves in the frame groove of the fixed frame, and the electric push rod drives the fixed bottom plate to press down the sound insulation pad to fix the sound insulation pad. The fixing component moves with the first moving part, so when cutting, the position of the fixed bottom plate pressing down the sound insulation pad does not hinder the normal cutting operation. The existing method directly performs the pressing and fixing effect on both ends of the sound insulation pad after cutting one line. When cutting the next line, one end will lose the pressing and fixing effect, and the cutting will be uneven. If it is fixed, it is necessary to move the fixed structure or the sound insulation pad again, which is time-consuming and labor-intensive, and has poor flexibility. Compared with the existing direct fixation, following the first moving part saves time and labor and improves flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the connection structure between the cutting component and the fixing component of the present invention; Figure 3 It is a schematic diagram of the isometric structure of the inner cross-section side of the protective sleeve of the present invention; Figure 4 It is a schematic diagram of the structure of the fixing assembly of the present invention; Figure 5 It is a schematic diagram of the support assembly structure of the present invention; Figure 6 It is a schematic diagram of the rear view structure of the support assembly of the present invention.

[0020] In the figure: 1. cutting base; 2. waste box; 3. cutting groove; 4. receiving cavity; 5. cleaning opening; 6. opening plate; 7. cutting assembly; 8. fixing assembly; 9. supporting assembly; 10. first moving part; 11. second moving part; 12. connecting seat; 13. protective cover; 14. cover plate; 15. ball screw guide rail; 16. guide rail mounting sleeve; 17. directional wheel; 18. first cutting knife; 19. second cutting knife; 20. third cutting knife ; 21. Fourth cutting knife; 22. Cylinder; 23. Cylinder mounting frame; 24. Fixed frame; 25. Fixed bottom plate; 26. Connecting plate; 27. Electric push rod; 28. Rear support frame; 29. ​​First side frame; 30. Directional slide groove; 31. Limit seat; 32. Stable top frame; 33. Connecting plate; 34. Frame groove; 35. Second side frame; 36. Air vent; 37. Single-head fastener; 38. Fixed plate; 39. Screw; 40. Mounting cavity. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] See also Figure 1-6An embodiment of the present invention is as follows: a cutting device for a front wall sound insulation pad of a new energy vehicle comprises a cutting base 1, the upper surface of the cutting base 1 is provided with a cutting groove 3 which runs through from top to bottom, a cutting assembly 7 is provided above the cutting base 1, a fixing assembly 8 is provided at the lower end of the cutting assembly 7, a supporting assembly 9 is provided at the top of the cutting assembly 7, the cutting assembly 7 comprises a first moving part 10 and a second moving part 11, the second moving part 11 drives the first moving part 10 to move through a connecting seat 12, the first moving part 10 and the second moving part 11 both comprise a slide rail mounting sleeve 16 and a ball screw slide rail 15, and the ball screw slide rail 15 is installed inside the slide rail mounting sleeve 16, the ball screw slide rail 15 of the first moving part 10 is connected with a protective sleeve 13, the interior of the protective sleeve 13 is provided with a mounting cavity 40 which runs through from top to bottom, the top end of the protective sleeve 13 is fixed with a cover plate 14 with external bolts, the interior of the mounting cavity 40 is provided with a first cutting knife 18, one side of the first cutting knife 18 A second cutting knife 19 is arranged on one side of the second cutting knife 19, a third cutting knife 20 is arranged on one side of the second cutting knife 19, a fourth cutting knife 21 is arranged on one side of the third cutting knife 20, the first cutting knife 18, the second cutting knife 19, the third cutting knife 20 and the fourth cutting knife 21 are fixed to the fixing plate 38 by screws 39, a cylinder 22 is arranged on the upper end of the fixing plate 38, and the fixing heights of the four cylinders 22 are equidistantly reduced from left to right in sequence, so as to realize the first cutting knife 18, the second cutting knife 19, the third cutting knife 20 and the fourth cutting knife 21. The lowest ends of the third cutting knife 20 and the fourth cutting knife 21 are also lowered in sequence. The first cutting knife 18 first contacts the sound insulation pad, followed by the second cutting knife 19, the third cutting knife 20 and the fourth cutting knife 21. Since the first cutting knife 18, the second cutting knife 19, the third cutting knife 20 and the fourth cutting knife 21 are at different heights, the cutting depth of the pad is deepened in sequence during cutting, rather than cutting directly to the bottom, thereby improving the smoothness of the cutting. The fixing assembly 8 includes a fixing frame 24 and a connecting plate 26, and the connecting plate 26 is fixed to the fixing frame 24 by hot melting, and the connecting plate 26 is connected to the first moving part 10 through an electric push rod 27. A frame groove 34 is provided at the center of the fixing frame 24, and a fixing bottom plate 25 is provided on the lower surface of both sides of the fixing frame 24. The electric push rod 27 drives the fixing bottom plate 25 to press down the sound insulation pad to fix the sound insulation pad, and the fixing assembly 8 moves with the first moving part 10, so when cutting, the position of the fixing bottom plate 25 pressing down the sound insulation pad does not hinder the normal cutting operation, and there is no need to re-fix the position of the sound insulation pad, which saves time and effort and improves flexibility; The support assembly 9 includes a rear support frame 28, a stabilizing top frame 32 is welded to the top of the rear support frame 28, and one end of the stabilizing top frame 32 is welded and fixed to the slide rail mounting sleeve 16 of the second moving part 11, thereby strengthening the stability of the second moving part 11. The support assembly 9 also includes a first side frame 29 and a second side frame 35, and both ends of the rear support frame 28 are respectively fixed to the first side frame 29 and the second side frame 35 through external bolts of the connecting plate 33. A limited position seat 31 is provided on one side of the first side frame 29 and the second side frame 35 and the front surface of the rear support frame 28, thereby fixing the cutting base 1. The limiting effect avoids position displacement and improves the fixing stability. The upper surfaces of the first side frame 29 and the second side frame 35 are both provided with directional slide grooves 30. The lower ends of both ends of the slide rail mounting sleeve 16 of the first movable part 10 are both provided with directional wheels 17, and the directional wheels 17 move along the directional slide grooves 30, which support the first movable part 10 and improve the movement stability of the first movable part 10, thereby improving the cutting stability of the first cutting knife 18, the second cutting knife 19, the third cutting knife 20 and the fourth cutting knife 21, which are not easily obstructed and shaken, thereby improving the smoothness of cutting.

[0023] See also Figure 2 , 3 A cylinder mounting frame 23 is provided on the outside of the cylinder 22. There are four cylinder mounting frames 23, and the cylinder mounting frames 23 are welded and fixed to the inner wall of the mounting cavity 40. The cylinder 22 is fixed to the cylinder mounting frame 23 by a single-head fastener 37, which is convenient for disassembly and replacement of the cylinder 22. The front surface of the protective cover 13 is provided with air holes 36 to improve the heat dissipation effect of the cylinder 22.

[0024] See also Figure 1 A waste box 2 is hot-melted at the lower end of the cutting base 1, and a material receiving chamber 4 is arranged inside the waste box 2. The upper end of the material receiving chamber 4 is in an open form and is communicated with the cutting groove 3. A cleaning opening 5 is arranged on the front surface of the waste box 2, and the cleaning opening 5 is communicated with the material receiving chamber 4. The inside of the cleaning opening 5 is sealed by an opening plate 6, and the cutting waste is collected through the material receiving chamber 4. When there is too much waste in the material receiving chamber 4, the opening plate 6 is pulled out, the waste is taken out from the cleaning opening 5, and then the opening plate 6 is reinserted for sealing.

[0025] See also Figure 1-6 , a cutting method for a cutting device for a front wall sound insulation pad of a new energy vehicle, comprising the following steps: Step 1: Place the sound insulation pad on the cutting base 1, and after arranging them neatly, start the ball screw guide rail 15 of the second moving part 11 to drive the first moving part 10 to move, adjust the positions of the first cutting knife 18, the second cutting knife 19, the third cutting knife 20 and the fourth cutting knife 21, start the ball screw guide rail 15 of the first moving part 10, and drive the protective cover 13 to move to the rightmost end; Step 2: After the adjustment is completed, the electric push rod 27 is started to drive the fixed bottom plate 25 to press down the sound insulation pad, and the four cylinders 22 are started to drive the first cutting knife 18, the second cutting knife 19, the third cutting knife 20 and the fourth cutting knife 21 to move downward respectively, and the bottom surfaces of the first cutting knife 18, the second cutting knife 19, the third cutting knife 20 and the fourth cutting knife 21 to move downward are lowered in sequence; Step 3: Then start the ball screw guide rail 15 of the first moving part 10 again, driving the first cutting knife 18, the second cutting knife 19, the third cutting knife 20 and the fourth cutting knife 21 to move from right to left to cut the sound insulation pad. After the cutting is completed, the first cutting knife 18, the second cutting knife 19, the third cutting knife 20 and the fourth cutting knife 21 return to the initial position, and the fixed bottom plate 25 also returns to the initial position; Step 4: Then start the ball screw guide rail 15 of the second moving part 11 again, drive the first moving part 10 to move to the next cutting position, and then use the fixed bottom plate 25 to fix the sound insulation pad, and then use the first cutting knife 18, the second cutting knife 19, the third cutting knife 20 and the fourth cutting knife 21 to cut the sound insulation pad in turn, and the operation can be repeated in this way; Step 5: When there is too much waste material inside the receiving cavity 4, pull out the opening plate 6, take out the waste material from the cleaning opening 5, and then reinsert the opening plate 6 to seal it.

[0026] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A cutting device for a new energy vehicle front wall sound insulation pad, comprising a cutting base (1), wherein the upper surface of the cutting base (1) is provided with a cutting groove (3) penetrating from top to bottom, characterized in that: A cutting assembly (7) is arranged above the cutting base (1), a fixing assembly (8) is arranged at the lower end of the cutting assembly (7), a supporting assembly (9) is arranged at the top end of the cutting assembly (7), a waste box (2) is hot-melted at the lower end of the cutting base (1), a material receiving cavity (4) is arranged inside the waste box (2), and the upper end of the material receiving cavity (4) is in an open form and communicates with the cutting groove (3).

2. A cutting device for a front wall sound insulation pad of a new energy vehicle according to claim 1, characterized in that: The cutting assembly (7) comprises a first movable part (10) and a second movable part (11), wherein the second movable part (11) drives the first movable part (10) to move via a connecting seat (12), and the first movable part (10) and the second movable part (11) both comprise a slide rail mounting sleeve (16) and a ball screw slide rail (15), and the ball screw slide rail (15) is mounted inside the slide rail mounting sleeve (16).

3. A cutting device for a front wall sound insulation pad of a new energy vehicle according to claim 2, characterized in that: The ball screw guide rail (15) of the first movable part (10) is connected to a protective sleeve (13); a mounting cavity (40) penetrating from top to bottom is provided inside the protective sleeve (13); a cover plate (14) is fixed to the top of the protective sleeve (13) by external bolts; a first cutting knife (18) is provided inside the mounting cavity (40); a second cutting knife (19) is provided on one side of the first cutting knife (18); a third cutting knife (20) is provided on one side of the second cutting knife (19); a fourth cutting knife (21) is provided on one side of the third cutting knife (20); the first cutting knife (18), the second cutting knife (19), the third cutting knife (20) and the fourth cutting knife (21) are fixed to a fixing plate (38) by screws (39); a cylinder (22) is provided at the upper end of the fixing plate (38).

4. A cutting device for a front wall sound insulation pad of a new energy vehicle according to claim 3, characterized in that: A cylinder mounting frame (23) is arranged outside the cylinder (22), four cylinders (22) are arranged, and the cylinder mounting frame (23) is fixed to the inner wall of the mounting cavity (40) by welding, the cylinder (22) is fixed to the cylinder mounting frame (23) by a single-head fastener (37), and a ventilation hole (36) is arranged on the front surface of the protective sleeve (13).

5. A cutting device for a front wall sound insulation pad of a new energy vehicle according to claim 4, characterized in that: The fixing assembly (8) comprises a fixing frame (24) and a connecting plate (26), wherein the connecting plate (26) is fixed to the fixing frame (24) by heat-melting, the connecting plate (26) is connected to the first moving part (10) via an electric push rod (27), a frame groove (34) is provided at the center of the fixing frame (24), and fixing bottom plates (25) are provided on the lower surfaces of both sides of the fixing frame (24).

6. A cutting device for a front wall sound insulation pad of a new energy vehicle according to claim 5, characterized in that: The support assembly (9) comprises a rear support frame (28), a stabilizing top frame (32) is welded to the top end of the rear support frame (28), and one end of the stabilizing top frame (32) is welded and fixed to the slide rail mounting sleeve (16) of the second movable part (11).

7. A cutting device for a front wall sound insulation pad of a new energy vehicle according to claim 6, characterized in that: The support assembly (9) further comprises a first side frame (29) and a second side frame (35), and both ends of the rear support frame (28) are respectively fixed to the first side frame (29) and the second side frame (35) by external bolts through a connecting plate (33), and one side of the first side frame (29) and the second side frame (35) and the front surface of the rear support frame (28) are both provided with a limiting seat (31).

8. A cutting device for a front wall sound insulation pad of a new energy vehicle according to claim 7, characterized in that: The upper surfaces of the first side frame (29) and the second side frame (35) are both provided with directional slide grooves (30), and the lower ends of both ends of the slide rail mounting sleeve (16) of the first movable part (10) are both provided with directional wheels (17), and the directional wheels (17) move along the directional slide grooves (30).

9. A cutting device for a new energy vehicle front wall sound insulation pad according to claim 8, characterized in that: The front surface of the waste material box (2) is provided with a cleaning opening (5), and the cleaning opening (5) is communicated with the material receiving cavity (4), and the interior of the cleaning opening (5) is sealed by an opening plate (6).

10. A cutting method for a cutting device for a front wall sound insulation pad of a new energy vehicle, based on the cutting device for a front wall sound insulation pad of a new energy vehicle according to claim 9, characterized in that: The following steps are involved: Step 1: Place the sound insulation pad on the cutting base (1), arrange them neatly, start the ball screw guide rail (15) of the second moving part (11), drive the first moving part (10) to move, adjust the positions of the first cutting knife (18), the second cutting knife (19), the third cutting knife (20) and the fourth cutting knife (21), start the ball screw guide rail (15) of the first moving part (10), and drive the protective cover (13) to move to the rightmost end; Step 2: After the adjustment is completed, the electric push rod (27) is started to drive the fixed bottom plate (25) to press down the sound insulation pad, and the four cylinders (22) are started to drive the first cutting knife (18), the second cutting knife (19), the third cutting knife (20) and the fourth cutting knife (21) to move downward respectively, so that the bottom surfaces of the first cutting knife (18), the second cutting knife (19), the third cutting knife (20) and the fourth cutting knife (21) are lowered in sequence; Step 3: Then, the ball screw guide rail (15) of the first moving part (10) is started again to drive the first cutting knife (18), the second cutting knife (19), the third cutting knife (20) and the fourth cutting knife (21) to move from right to left to cut the sound insulation pad. After the cutting is completed, the first cutting knife (18), the second cutting knife (19), the third cutting knife (20) and the fourth cutting knife (21) return to their initial positions, and the fixed bottom plate (25) also returns to its initial position; Step 4: Then start the ball screw guide rail (15) of the second moving part (11) again to drive the first moving part (10) to move to the next cutting position, and then use the fixed bottom plate (25) to fix the sound insulation pad, and then use the first cutting knife (18), the second cutting knife (19), the third cutting knife (20) and the fourth cutting knife (21) to cut the sound insulation pad in turn, and the operation can be repeated in this way; Step 5: When there is too much waste material inside the receiving cavity (4), pull out the opening plate (6), take out the waste material from the cleaning opening (5), and then reinsert the opening plate (6) to seal it.

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