CN118876148A - Tire cutting device and tire cutting method - Google Patents

Abstract

The application discloses a tire cutting device and a tire cutting method, and relates to the technical field of tire cutting. The tire cutting device comprises a workbench, wherein a driving mechanism is arranged on the workbench, a grabbing mechanism is arranged on the driving mechanism, and the driving mechanism is used for driving the grabbing mechanism to move so as to grab tires; the workbench is also provided with a cutting piece, and the driving mechanism is also used for driving the grabbing mechanism to move so that the cutting piece is pressed into the tire and rotates the tire to cut the rubber ring on the tire. The application also discloses a cutting method of the tire cutting device. The application can improve the efficiency of cutting the tire.

Description

Tire cutting device and tire cutting method

Technical Field

The present application relates to the technical field of tire cutting, and in particular to a tire cutting device and a tire cutting method.

Background Art

Tires are circular elastic rubber products that roll on the ground and are installed on various vehicles or machines. In the automotive field, tires and suspensions usually work together to mitigate the impact of the car when it is driving, ensuring that the car has good riding comfort and driving smoothness. Tire quality is one of the important components that affect the driving performance of the car. Among them, tires usually consist of at least two parts, the crown and the sidewall. The crown is the part that contacts the road surface, while the sidewall is mainly used to withstand flexural deformation. In order to ensure driving safety, people will replace tires regularly, and crush and recycle waste tires.

Currently, since tires are usually cylindrical and relatively large in size, they need to be pre-cut to separate them into multiple rubber rings. Specifically, workers will place the tire on a rotating platform, insert a fixed cutting tool into the tire, and then drive the rotating platform to drive the tire to rotate to cut the rubber ring. Typically, workers will cut off both sidewalls and then cut the crown.

With respect to the above-mentioned related solutions, the inventors believe that the following defects exist: placing the tire on the rotating platform and inserting the cutter on the tire require much manual participation, which is inefficient, time-consuming and labor-intensive.

Summary of the invention

In order to improve the efficiency of tire cutting, the present application provides a tire cutting device and a tire cutting method.

In the first aspect, the above-mentioned object of the present invention is achieved through the following technical solutions:

A tire cutting device comprises a workbench, wherein a driving mechanism is arranged on the workbench, a gripping mechanism is arranged on the driving mechanism, and the driving mechanism is used to drive the gripping mechanism to move so as to grip the tire; a cutting piece is also arranged on the workbench, and the driving mechanism is also used to drive the gripping mechanism to move so as to press the cutting piece into the tire and rotate the tire to cut a rubber ring on the tire.

By adopting the above technical solution, the driving mechanism can drive the grabbing mechanism to move and grab the tire and move the tire to contact the cutting piece. At this time, the driving mechanism can apply force to press the cutting piece into the tire, and then the driving mechanism can be driven again to drive the tire to rotate to cut the lower rubber ring. The present application can automatically cut the tire.

Preferably, the gripping mechanism comprises a mounting plate arranged on the driving mechanism, and a rotating plate is rotatably arranged on the mounting plate; at least two gripping assemblies are arranged on the rotating plate, wherein the two gripping assemblies are arranged opposite to each other, and a driving assembly is also provided on the mounting plate, and the driving assembly is used to drive the rotating plate to rotate so that the two gripping assemblies can grip the tire.

By adopting the above technical solution, the driving assembly can drive the rotating disk to rotate so that the two grabbing assemblies grab the tire.

Preferably, each of the grabbing assemblies comprises a guide block, a guide rail is provided on the mounting plate, and the guide block is slidably arranged on the guide rail; each of the guide blocks is hingedly connected to a connecting rod, and one end of each connecting rod away from the guide block is hingedly connected to the rotating plate; each of the guide blocks is provided with a clamping member, and the driving assembly is used to drive the rotating plate to rotate so that the two guide blocks slide and then drive the two clamping members to clamp the tire.

By adopting the above technical solution, the rotation of the rotating disk can drive the connecting rod to move so that the guide block slides in the guide groove, and the sliding of the guide block can drive the clamping member to move back and forth; therefore, after the driving component drives the rotating disk to rotate, the two clamping members can clamp the tire.

Preferably, the clamping member comprises a transverse plate connected to the guide block, one end of the transverse plate away from the guide block is connected to a vertical plate, and a resistance pad is provided on the clamping surface of the vertical plate.

By adopting the above technical solution, when the clamping member clamps the tire, the resistance pad can prevent the tire from slipping by friction.

Preferably, a clamping surface of each clamping member is provided with a limiting spike, and the driving assembly is also used to drive the limiting spike to move so as to be inserted into the tire and then prevent the tire from rotating relative to the rotating disk.

By adopting the above technical solution, the driving assembly can drive the clamping member to move so that the limiting thorn moves and is inserted into the tire. This design is used to prevent the tire from rotating relative to the rotating disk when the driving assembly drives the tire to rotate.

Preferably, six grabbing assemblies are provided, and the six grabbing assemblies are evenly distributed along the circumferential direction of the rotating disk.

By adopting the above technical solution, six gripping assemblies evenly distributed along the circumferential direction can ensure the clamping stability of the tire.

Preferably, the driving assembly includes a driving member, which is arranged on a mounting disk, and is provided with a worm. The mounting disk is also provided with a worm wheel, and the worm is meshed with the worm wheel; a linkage rod is provided on the rotating disk, and the linkage rod is connected to the worm wheel. The driving member is used to drive the worm to rotate, thereby driving the worm wheel to rotate, and then driving the rotating disk to rotate through the linkage rod.

By adopting the above technical solution, the driving member can drive the worm to rotate and thus drive the worm wheel to rotate, and the rotation of the worm wheel can drive the rotating disk to rotate through the linkage rod.

Preferably, the driving mechanism comprises a frame arranged on the workbench, the frame is provided with a horizontal reciprocating driving member, the horizontal reciprocating driving member is provided with a vertical reciprocating driving member, and the grasping mechanism is provided on the vertical reciprocating driving member.

Preferably, at least two cutting members are provided, wherein one of the cutting members is a transverse cutting member and the other cutting member is a vertical cutting member, the transverse cutting member is used for pressing and cutting into the tire transversely, and the vertical cutting member is used for pressing and cutting into the tire vertically.

By adopting the above technical solution, the transverse cutting piece is mainly used to cut the crown, while the vertical cutting piece is mainly used to cut the sidewall.

In the second aspect, the second object of the present invention is achieved by the following technical solutions:

A cutting method applied to a tire cutting device comprises the following steps:

S1, the driving mechanism drives the grasping mechanism to move and grasp the outer wall of the tire crown and drives the tire to move so that the cutting piece is pressed into the sidewalls of the tires on both sides;

S2, the driving mechanism drives the tire to rotate to simultaneously cut the two sidewalls to obtain the tire crown;

S3, the driving mechanism drives the tire crown to move and place it on the workbench, and the grasping mechanism changes from grasping the outer wall of the tire crown to supporting the inner wall of the tire crown;

S4, the driving mechanism drives the tire crown to move so that the cutting piece is pressed into the tire crown;

S5. The driving mechanism drives the tire crown to rotate for cutting.

By adopting the above technical solution, the sidewalls of the tire can be cut off first, and then the crown can be cut into multiple rubber rings; after the sidewalls of the tire are cut off, the gripping of the outer wall of the crown may cause the crown to deform and cause the crown to fall off. The present application can grip the crown on the one hand, and on the other hand, can also make the crown tight to facilitate cutting.

In summary, the present invention includes at least one of the following beneficial technical effects:

1. The driving mechanism can drive the grabbing mechanism to move and grab the tire and move the tire to contact the cutting piece. At this time, the driving mechanism can apply force to press the cutting piece into the tire, and then the driving mechanism can be driven again to drive the tire to rotate to cut the rubber ring. This application can automatically cut the tire;

2. The sidewalls of the tire can be cut off first, and then the crown can be cut into multiple rubber rings; after the sidewalls of the tire are cut off, the gripping of the outer wall of the crown may cause the crown to deform and thus cause the crown to fall off. The inner support of the crown in the present application can grip the crown on the one hand, and on the other hand, can also make the crown tight for easy cutting.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the overall structure of a tire cutting device according to an embodiment of the present application;

FIG2 is a schematic diagram showing the structure of a transverse cutting member;

FIG3 is a schematic diagram showing the structure of a vertical cutting member;

FIG4 is a schematic diagram showing the structure of a grabbing mechanism;

FIG5 is a schematic diagram showing the structure of the grabbing mechanism from another perspective;

FIG. 6 is a schematic diagram showing the structure of a worm gear.

Markings in the accompanying drawings: 1, workbench; 11, horizontal cutting member; 111, blade; 112, first blade; 113, second blade; 114, third blade; 12, vertical cutting member; 121, blade; 122, blade one; 123, blade two; 124, blade three; 2, driving mechanism; 21, frame; 22, horizontal reciprocating driving member; 23, vertical reciprocating driving member; 24, fixing plate; 25, transmission column; 26, mounting frame ; 27, driving member; 271, first transmission member; 272, second transmission member; 3, grabbing mechanism; 31, mounting plate; 32, rotating plate; 33, grabbing assembly; 331, guide block; 332, guide rail; 333, connecting rod; 334, clamping member; 3341, horizontal plate; 3342, vertical plate; 34, driving assembly; 341, driving member; 342, worm; 343, worm wheel; 344, linkage rod; 4, limiting spike.

DETAILED DESCRIPTION

The present invention is further described in detail below in conjunction with the accompanying drawings.

In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

The embodiment of the present application discloses a tire cutting device. It is used to cut a tire into multiple rubber rings. Referring to Figure 1, a tire cutting device includes a workbench 1, a driving mechanism 2 is provided on the workbench 1, and a gripping mechanism 3 is provided on the driving mechanism 2. The driving mechanism 2 is used to drive the gripping mechanism 3 to move so as to grip the tire; at least two cutting pieces are also provided on the workbench 1 below the driving mechanism 2. In this embodiment, the number of the cutting pieces is two, one of which is a transverse cutting piece 11, and the other is a vertical cutting piece 12. The transverse cutting piece 11 is used to press and cut into the tire transversely, while the vertical cutting piece 12 is used to press and cut into the tire vertically; the driving mechanism 2 is used to drive the gripping mechanism 3 to move so that the transverse cutting piece 11 or the vertical cutting piece 12 is pressed and cut into the tire, and at this time, the driving mechanism 2 can rotate the tire to cut the rubber ring on the tire.

2 and 3, specifically, the horizontal cutting member 11 comprises a blade 111 disposed on the workbench 1, a first blade 112 is disposed at the rear end of the blade 111, a second blade 113 is disposed at the front end of the blade 111, and a third blade 114 is disposed at the right end of the blade 111. The first blade 112 and the second blade 113 are mainly used to cut the tire in coordination with the rotation of the tire, and the third blade 114 is mainly used to insert the tire for subsequent cutting. The vertical cutting member 12 comprises a blade 121 disposed on the workbench 1, the projection of the blade 121 on the plumb line is a crescent shape, a blade 122 is disposed at the rear end of the blade 121, a blade 2 123 is disposed at the front end of the blade 121, and a blade 3 124 is disposed at the upper end of the blade 121. The blades 122 and 123 are used to cut the tire, and the blade 3 124 is used to insert the tire for subsequent cutting.

Referring to FIG1 , specifically, the driving mechanism 2 includes a frame 21 disposed on the workbench 1, a horizontal reciprocating driving member 22 is disposed on the frame 21, a vertical reciprocating driving member 23 is disposed on the horizontal reciprocating driving member 22, the horizontal reciprocating driving member 22 and the vertical reciprocating driving member 23 are preferably cylinders, and a fixing plate 24 is disposed on the vertical reciprocating driving member 23. Referring to FIG4 , a transmission column 25 is disposed at the lower end of the fixing plate 24, and a mounting frame 26 is connected to the lower end of the transmission column 25. The mounting frame 26 is connected to the grasping mechanism 3, and the rotation of the transmission column 25 can drive the mounting frame 26 to rotate. The frame 26 and the grasping mechanism 3 rotate synchronously; a driving member 27 is provided on the fixed plate 24, and the driving member 27 is preferably a motor. A first transmission member 271 is provided on the driving member 27, and a second transmission member 272 is provided on the transmission column 25. The first transmission member 271 and the second transmission member 272 are preferably bevel gears, and the first transmission member 271 is meshed with the second transmission member 272. The driving member 27 is used to drive the first transmission member 271 to rotate, thereby driving the second transmission member 272 to rotate and then driving the transmission column 25 to rotate; the grasping mechanism 3 is arranged on the mounting frame 26.

Take the cutting of the tire by the vertical cutting piece 12 as an example: after the gripping mechanism 3 grips the tire, the transverse reciprocating drive member 22 and the vertical reciprocating drive member 23 are driven to move the tire so that the vertical cutting piece 12 is pressed into the tire, and then the driving drive member 27 drives the first transmission member 271, the second transmission member 272, the transmission column 25, the mounting frame 26 and the gripping mechanism 3 to rotate. The rotation of the gripping mechanism 3 will drive the tire to rotate so that the rubber ring is cut off the tire.

When using the vertical cutting piece 12 for cutting, it is necessary to go through the step of moving the tire downward so that the vertical cutting piece 12 can be inserted into the tire. At this time, since the tire is on top and the vertical cutting piece 12 is on the bottom, the tire's own gravity participates in a certain degree of cutting assistance while the tire is inserted by the vertical cutting piece 12. Currently, most of the existing technologies are for the tire to be set at the bottom and the cutting tool to be set at the top. Compared with the existing technology, the present application can more conveniently insert the cutting tool into the tire.

4 and 5 , the gripping mechanism 3 includes a mounting plate 31 disposed on the mounting frame 26. The rotation of the mounting frame 26 can drive the mounting plate 31 to rotate. A rotating plate 32 is rotatably provided on the mounting plate 31. The rotating plate 32 is provided with at least two gripping components 33. In the present embodiment, the number of the gripping components 33 is six, and the six gripping components 33 are evenly distributed along the circumferential direction of the rotating plate 32. A driving component 34 is also provided on the mounting plate 31. The driving component 34 is used to drive the rotating plate 32 to rotate so that the six gripping components 33 gather together to grip the tire.

5 , the six gripping assemblies 33 have the same structure. Take the structure of one of the gripping assemblies 33 as an example: the gripping assembly 33 includes a guide block 331, a guide rail 332 is provided on the mounting plate 31, the guide rail 332 is arranged along the radial direction of the mounting plate 31, and the guide block 331 is slidably arranged on the guide rail 332; a connecting rod 333 is hingedly connected to the guide block 331, and one end of the connecting rod 333 away from the guide block 331 is hingedly connected to the rotating plate 32, and a clamping member 334 is provided on the guide block 331. The rotation of the rotating plate 32 can drive the six guide blocks 331 to move synchronously, thereby making the six clamping members 334 move synchronously and then clamp the tire.

4 and 6 , the driving assembly 34 includes a driving member 341, which is preferably a motor. The driving member 341 is disposed at the upper end of the mounting disk 31, and a worm 342 is disposed on the driving member 341. A worm wheel 343 is also rotatably disposed on the mounting disk 31. The worm 342 is meshed with the worm wheel 343, and the worm 342 and the worm wheel 343 can be self-locking. A linkage rod 344 is disposed on the rotating disk 32, and the linkage rod 344 is connected to the worm wheel 343. The driving member 341 is used to drive the worm 342 to rotate, thereby driving the worm wheel 343 to rotate, and then driving the rotating disk 32 to rotate through the linkage rod 344.

First, the tire stack is placed on the upper end of the workbench 1, and then the horizontal reciprocating drive member 22 and the vertical reciprocating drive member 23 are driven to drive the six clamping members 334 to move until the tire is located between the six clamping members 334. At this time, the driving member 341 drives the worm 342, the worm wheel 343, the linkage rod 344 and the rotating disk 32 to rotate, and the six clamping members 334 will gather to clamp the tire.

5 , specifically, the six clamping members 334 have the same structure, and the structure of one of the clamping members 334 is taken as an example: the clamping member 334 includes a transverse plate 3341 connected to the guide block 331, and the end of the transverse plate 3341 away from the guide block 331 is connected to a vertical plate 3342, and a resistance pad is provided on the clamping surface of the vertical plate 3342, and the resistance pad is made of rubber material, which is used to increase friction.

Referring to Figure 5, after the six clamping members 334 clamp the tire, when the tire is driven to rotate by the driving member 27 for cutting, the tire may rotate, resulting in poor cutting efficiency. In order to prevent the tire from rotating relative to the mounting plate 31, a limiting spike 4 is provided on the clamping surface of each clamping member 334. When the driving member 341 drives the clamping member 334 to move and clamp the tire, the limiting spike 4 will also move synchronously and be inserted into the tire. At this time, the limiting spike 4 plays a role in limiting the position of the tire, which can prevent the tire from rotating relative to the rotating plate 32.

The implementation principle of a tire cutting device in the embodiment of the present application is:

First, the tires are stacked and placed on the upper end of the workbench 1, and then the horizontal reciprocating driving member 22 and the vertical reciprocating driving member 23 are driven to drive the six clamping members 334 to move until the tire is located between the six clamping members 334. At this time, the driving member 341 drives the worm 342, the worm wheel 343, the linkage rod 344 and the rotating disk 32 to rotate, and the six clamping members 334 will gather to clamp the tire;

The transverse reciprocating drive member 22 and the vertical reciprocating drive member 23 are driven again to move the tire until the vertical cutting member 12 or the transverse cutting member 11 is inserted into the tire, and then the driving member 27 is driven to drive the first transmission member 271, the second transmission member 272, the transmission column 25, the mounting frame 26 and the mounting plate 31 to rotate. The rotation of the mounting plate 31 will cause the tire to rotate so that the tire is cut by the vertical cutting member 12 or the transverse cutting member 11.

The present application also discloses a cutting method of a tire cutting device, which is used to first cut off the sidewall of the tire, and then cut the crown into two or more rubber rings. The cutting method of the tire cutting device includes the following steps:

S1. Drive the transverse reciprocating drive member 22 and the vertical reciprocating drive member 23 to drive the six clamping members 334 to move until the tire is located between the six clamping members 334, and drive the driving member 341 to drive the rotating disk 32 to rotate. The rotation of the rotating disk 32 drives the six clamping members 334 to gather and clamp the tire; drive the transverse reciprocating drive member 22 and the vertical reciprocating drive member 23 again to drive the tire to move until the vertical cutting member 12 is inserted into the connection between the sidewall and the crown.

S2. The driving member 27 drives the mounting plate 31 to rotate. The rotation of the mounting plate 31 drives the tire to rotate so that the sidewall is cut off. At this time, the tire crown remains on the six clamping members 334.

If the tire is small and easy to cut, the vertical cutting member 12 can be inserted into both sidewalls of the tire at the same time, and the driving member 27 can cut both sidewalls at one time.

S3, driving the transverse reciprocating driving member 22 and the vertical reciprocating driving member 23 to move the tire crown and place it on the workbench 1, and driving the driving member 341 to move the six clamping members 334 so that the six clamping members 334 change the gripping of the outer wall of the tire crown to the inner support of the tire crown;

After the sidewalls on both sides are cut off, the structural strength of the crown may be insufficient, which will cause the six clamps 334 to clamp the crown to deformation and cause the crown to fall off. The six clamps 334 can change the grip on the outer wall of the crown to the inner support of the crown to prevent the above situation from happening, and the inner support of the crown can also make the crown taut to facilitate cutting.

S4, driving the transverse reciprocating driving member 22 and the vertical reciprocating driving member 23 to drive the tire crown to move so that the transverse cutting member 11 is pressed into the tire crown;

S5. Drive the rotating member 27 to rotate the tread crown to cut the tread crown to obtain two rubber rings.

More rubber rings can be cut by repeating S4 and S5.

The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A tire cutting device, characterized in that it comprises a workbench (1), a driving mechanism (2) is provided on the workbench (1), a gripping mechanism (3) is provided on the driving mechanism (2), and the driving mechanism (2) is used to drive the gripping mechanism (3) to move so as to grip the tire; a cutting piece is also provided on the workbench (1), and the driving mechanism (2) is also used to drive the gripping mechanism (3) to move so as to press the cutting piece into the tire and rotate the tire to cut off a rubber ring on the tire. 2. A tire cutting device according to claim 1, characterized in that: the grabbing mechanism (3) comprises a mounting plate (31) arranged on the driving mechanism (2), and a rotating plate (32) is rotatably arranged on the mounting plate (31); at least two grabbing components (33) are arranged on the rotating plate (32), wherein the two grabbing components (33) are arranged opposite to each other, and a driving component (34) is also arranged on the mounting plate (31), and the driving component (34) is used to drive the rotating plate (32) to rotate so that the two grabbing components (33) grab the tire. 3. A tire cutting device according to claim 2, characterized in that: each of the grabbing components (33) includes a guide block (331), a guide rail (332) is provided on the mounting plate (31), and the guide block (331) is slidably arranged on the guide rail (332); each of the guide blocks (331) is hingedly connected to a connecting rod (333), and one end of each connecting rod (333) away from the guide block (331) is hingedly connected to the rotating plate (32); each of the guide blocks (331) is provided with a clamping member (334), and the driving component (34) is used to drive the rotating plate (32) to rotate so that the two guide blocks (331) slide and then drive the two clamping members (334) to clamp the tire. 4. A tire cutting device according to claim 3, characterized in that: the clamping member (334) includes a transverse plate (3341) connected to the guide block (331), the end of the transverse plate (3341) away from the guide block (331) is connected to a vertical plate (3342), and a resistance pad is provided on the clamping surface of the vertical plate (3342). 5. A tire cutting device according to claim 3, characterized in that: a limiting thorn (4) is provided on the clamping surface of each clamping member (334), and the driving component (34) is also used to drive the limiting thorn (4) to move so as to be inserted into the tire and then prevent the tire from rotating relative to the rotating disk (32). 6. A tire cutting device according to claim 2, characterized in that: there are six grabbing assemblies (33), and the six grabbing assemblies (33) are evenly distributed along the circumferential direction of the rotating disk (32). 7. A tire cutting device according to claim 2, characterized in that: the driving component (34) includes a driving member (341), the driving member (341) is arranged on the mounting plate (31), a worm (342) is provided on the driving member (341), a worm wheel (343) is also rotatably provided on the mounting plate (31), the worm (342) is meshed with the worm wheel (343); a linkage rod (344) is provided on the rotating plate (32), the linkage rod (344) is connected to the worm wheel (343), the driving member (341) is used to drive the worm (342) to rotate, thereby driving the worm wheel (343) to rotate, and then driving the rotating plate (32) to rotate through the linkage rod (344). 8. A tire cutting device according to claim 1, characterized in that: the driving mechanism (2) comprises a frame (21) arranged on the workbench (1), the frame (21) is provided with a horizontal reciprocating driving member (22), the horizontal reciprocating driving member (22) is provided with a vertical reciprocating driving member (23), the vertical reciprocating driving member (23) is provided with a fixing plate (24), the fixing plate (24) is provided with a transmission column (25), the transmission column (25) is connected to a mounting frame (26), the mounting frame (26) ) is connected to the grasping mechanism (3); a driving member (27) is provided on the fixing plate (24), a first transmission member (271) is provided on the driving member (27), a second transmission member (272) is provided on the transmission column (25), the first transmission member (271) is meshed with the second transmission member (272), the driving member (27) is used to drive the first transmission member (271) to rotate, thereby driving the second transmission member (272) to rotate and then driving the transmission column (25) to rotate; the grasping mechanism (3) is arranged on the mounting frame (26). 9. A tire cutting device according to claim 1, characterized in that: there are at least two cutting pieces, one of which is a transverse cutting piece (11) and the other is a vertical cutting piece (12), the transverse cutting piece (11) is used to press and cut into the tire transversely, and the vertical cutting piece (12) is used to press and cut into the tire vertically. 10. A cutting method applied to a tire cutting device according to any one of claims 1 to 9, characterized in that it comprises the following steps: S1, the driving mechanism (2) drives the grasping mechanism (3) to move and grasp the outer wall of the crown of the tire and drive the tire to move so that the cutting piece is pressed into the sidewalls of the tires on both sides; S2, the driving mechanism (2) drives the tire to rotate so as to simultaneously cut the sidewalls on both sides to obtain the tire crown; S3, the driving mechanism (2) drives the tire crown to move and place it on the workbench (1), and the grasping mechanism (3) changes from grasping the outer wall of the tire crown to supporting the inside of the tire crown; S4, the driving mechanism (2) drives the tire crown to move so that the cutting piece is pressed into the tire crown; S5. The driving mechanism (2) drives the tire crown to rotate for cutting.