Processing method of thermal composite sound insulation material for automobile tire

Abstract

The invention relates to the technical field of automobile part manufacturing, in particular to an automobile tire thermal composite sound insulation material processing method which comprises the following steps: step a, loading and positioning, step b, primary swing locking, step c, primary flash cutting, step d, secondary swing locking, step e, secondary flash cutting and step f, stripping. In the water cutting machining process of the composite part, on the basis of a specific positioning tool, the framework is matched with the elastic expansion nails, the framework is inclined, so that the to-be-cut edge of the composite part is exposed to facilitate water cutting machining, the machining precision is improved, meanwhile, the elastic expansion nails are compressed and expanded, and the composite part is pressed and limited; therefore, multi-point loading and positioning of the composite part can be directly completed, and the problem that in the water cutting machining process of the composite part, the multi-point positioning process of the composite part is tedious is solved.

Description

Technical Field

[0001] This invention relates to the field of automotive parts manufacturing technology, specifically to a method for processing automotive tire thermal composite sound insulation materials. Background Technology

[0002] With the development of the automotive industry, consumers have increasingly higher demands for vehicle comfort. During driving, tire noise is a significant source of interior noise, severely impacting the driving and riding experience. To reduce tire noise, sound-insulating materials are typically installed inside the tires or in areas such as the wheel arches.

[0003] Currently, the common processing method for automotive tire sound insulation materials is to use "rubber damping layer + PET non-woven fabric sound absorption layer + hot melt adhesive film" or "polyurethane foam + butyl rubber layer" as raw materials, and form them into composite parts for automotive tire sound insulation through hot pressing. After forming the composite parts, the composite parts need to be post-processed. According to the inner cavity size of the tire, the composite parts are cut by water jet cutting to remove the excess burrs at the edges of the composite parts.

[0004] However, when performing waterjet cutting on composite parts, the shape and size of the composite parts are designed to mimic the inner cavity of the tire, so the composite parts are mostly arc-shaped structures. When waterjet cutting composite parts with arc-shaped structures, there are problems with loading and positioning. In addition, the rigidity of the composite parts is relatively poor. Single-point positioning is very easy to cause deformation of the composite parts during cutting due to the water cutting force, resulting in a decrease in cutting accuracy. On the other hand, multi-point positioning makes the loading and positioning process of the composite parts cumbersome and reduces work efficiency.

[0005] Therefore, there is an urgent need for a processing method that enables rapid multi-point positioning and loading of composite parts during waterjet cutting. Summary of the Invention

[0006] To address the above problems, the present invention aims to provide a method for processing automotive tire thermal composite sound insulation materials. During the waterjet cutting process of the composite, based on a unique positioning fixture, a skeleton and elastic expansion pins are used in conjunction. The skeleton is tilted, exposing the edge of the composite to be cut, which facilitates waterjet cutting and improves processing accuracy. At the same time, the elastic expansion pins are compressed and expanded to press and limit the composite, allowing the composite to directly complete multi-point loading and positioning. This solves the problem of cumbersome multi-point positioning of the composite during waterjet cutting.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A method for processing automotive tire thermal composite sound insulation material includes the following steps: Step a) Mounting: Mount the composite component onto the positioning fixture located above the waterjet cutting groove. The positioning fixture includes a frame and elastic expansion pins. The elastic expansion pins are protruding and mounted on the frame. The frame supports the composite component. The elastic expansion pins engage with the mounting holes on the composite component to initially position the composite component. Step b, single swing locking: The drive mechanism installed on the positioning fixture drives the rotating shaft to rotate, which drives the skeleton installed on it to rotate and swing, so that the composite part is in an inclined state. Simultaneously, the elastic expansion pin compresses and expands to lock the composite part. Step c: First flash cutting. The water cutting robot arm set next to the water cutting groove cuts the flash at the upper edge of the composite part supported on the frame. Step d, secondary swing locking: the driving mechanism drives the rotating shaft to rotate in the opposite direction, the rotating shaft drives the skeleton to swing in the opposite direction, causing the composite to tilt in the opposite direction, the elastic expansion pin is compressed and expanded again, and the composite is locked, so that the upper edge of the composite is switched. Step e: Secondary flash cutting, the water jet cutting robot cuts the upper edge flash of the switched composite part; Step f, unloading: After completing step e, the drive mechanism drives the rotating shaft to rotate in the opposite direction again, causing the skeleton to swing back to the initial position. The elastic expansion pins release their compression and expansion, and the composite part detaches from the skeleton to complete the unloading.

[0008] As an improvement, in step a, the skeleton includes a swing seat, a supporting square tube, a supporting plate, and a supporting cylinder. The swing seat is mounted on the rotating shaft and rotates synchronously with the rotating shaft. The supporting square tube is mounted on the swing seat, and the supporting plate is mounted on the supporting square tube. The supporting plate supports the mounting holes on the composite component. The supporting cylinder is located at the outward protrusion of the mounting holes on the composite component and is connected to the corresponding supporting plate.

[0009] As an improvement, in step a, both the support plate and the support cylinder are provided with through holes corresponding to the mounting holes, and the elastic expansion pins are installed at these through holes.

[0010] As an improvement, in step a, the elastic expansion nail includes a threaded connector, a lifting column, a melon-shaped spring plate, and a tension rope; The threaded connector is inserted into the corresponding through hole, the threaded connector is fixedly installed, and a central hole is opened at the central axis of the threaded connector; The lifting column is inserted into the central hole and is slidably disposed along the central hole; The melon-shaped spring sheet is sleeved on the lifting column, and the melon-shaped spring sheet abuts against the lifting column and the threaded connector; The tension rope drives the lifting column and the rotating shaft. When the rotating shaft rotates, the lifting column slides through the tension rope, compressing and expanding the melon-shaped spring plate to lock and limit the composite component.

[0011] As an improvement, the threaded connector includes a disc and a threaded post. The diameter of the disc is larger than the diameter of the through hole. The threaded post passes through the through hole and is threaded with a mounting nut, which locks the threaded connector.

[0012] As an improvement, the lifting column includes a column body, a limiting plate, a support plate, and a limiting nut; The column is cylindrical in shape; The limiting plate is disposed at the end where the column is connected to the tension rope. The limiting plate abuts against the threaded connector to limit the position of the column. The support plate is disposed at the end of the column that abuts against the melon-shaped spring sheet, and the support plate supports and mounts the melon-shaped spring sheet; The limiting nut is threaded onto the support plate, and the limiting nut cooperates with the support plate to lock the melon-shaped spring plate in place.

[0013] As an improvement, the elastic expansion pin also includes symmetrically arranged guide wheels, which are mounted on the threaded connector via roller seats, and guide the tension rope between the guide wheels.

[0014] As an improvement, in steps b and d, the tension ropes in the elastic expansion nails are all connected to the weights, which are slidably mounted on the sleeve of the swing seat. A rotating cam is installed above the rotating shaft. The rotating cam is connected to the plumb bob through a connecting rope. When the rotating shaft drives the frame to rotate and swing, it synchronously drives the rotating cam to rotate and swing in the opposite direction, pulling the plumb bob to slide downward, so that all the elastic expansion nails are compressed and expanded synchronously.

[0015] As an improvement, the rotating cam is rotatably mounted on the support arm, the rotating shaft is rotatably passed through the support arm, and the rotating cam and the rotating shaft are connected by a gear set.

[0016] As an improvement, the rotating shaft is rotatably mounted on the frame of the positioning fixture, and the support legs at the four corners of the frame are connected to the waterjet cutting groove by threaded fasteners. The drive mechanism is mounted on the frame and drives the rotating shaft to rotate synchronously.

[0017] The beneficial effects of this invention are as follows: (1) In the process of water jet cutting of composite parts, the present invention uses a unique positioning fixture, with the skeleton and elastic expansion nails working together. The skeleton is tilted so that the edge of the composite part to be cut is exposed to facilitate water jet cutting, which improves the processing accuracy. At the same time, the elastic expansion nails are compressed and expanded to press and limit the composite part, so that the composite part can directly complete multi-point loading and positioning, thereby solving the problem of cumbersome multi-point positioning process of composite parts in water jet cutting. (2) The present invention preferentially sets two sets of rotating shafts, and sets two sets of skeletons on each set of rotating shafts, thereby realizing the simultaneous completion of water cutting of 4 sets of composite parts. When the composite parts swing and tilt, so that the edge to be cut of the composite parts is exposed, the 4 sets of composite parts expose the same edge to be cut simultaneously, thereby making the water cutting robot consistent in its walking path when performing water cutting, thus ensuring high precision of the edge cutting of the composite parts. (3) When the composite parts are loaded and positioned at multiple points, the present invention uses a fully mechanical control structure to pull all the elastic expansion pins to compress and expand by sliding the plumb line, thereby loading and positioning the composite parts. This avoids the use of electrical control in a water environment, improves the stability and reliability of multi-point loading and positioning of composite parts, and reduces control costs.

[0018] In summary, this invention has the advantages of simple positioning process, fast response, high positioning accuracy and high processing efficiency, and is especially suitable for the field of waterjet cutting processing technology for automotive tire thermal composite sound insulation materials. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the processing method of the present invention; Figure 2 This is a three-dimensional structural diagram of the waterjet cutting system of the present invention; Figure 3 This is a partial structural diagram of the waterjet cutting system of the present invention; Figure 4 This is a schematic diagram of the three-dimensional structure of the positioning tooling of the present invention; Figure 5 for Figure 4 Enlarged schematic diagram of the structure at point A in the middle; Figure 6 This is a schematic diagram of the installation and connection between the rotating shaft and the frame of the present invention; Figure 7 This is a schematic diagram of the three-dimensional skeleton structure of the present invention; Figure 8 for Figure 7 Enlarged schematic diagram of the structure at point B; Figure 9 A schematic diagram of the front view of the skeleton structure of this invention; Figure 10 for Figure 9 Enlarged schematic diagram of the structure at point C; Figure 11 for Figure 9 Enlarged schematic diagram of the structure at point D; Figure 12 This is a schematic diagram of the three-dimensional structure of the plumb bob of the present invention; Figure 13 This is a schematic diagram of the connection structure between the plumb bob and the rotating shaft of the present invention; Figure 14 This is a three-dimensional structural diagram of the threaded connector of the present invention; Figure 15 This is a schematic diagram of the three-dimensional structure of the elastic expansion nail of the present invention; Figure 16 This is a schematic diagram of the three-dimensional structure of the melon-shaped spring sheet of the present invention; Figure 17 This is a schematic diagram of the three-dimensional structure of the lifting column of the present invention; Figure 18 This is a schematic diagram of the guide wheel mounting structure of the present invention.

[0020] The attached figures are labeled as follows: Composite part 10, Mounting hole 101, Waterjet cutting groove 1, Return water pipe 11, Positioning fixture I, Frame 2, Swing seat 21, Sleeve 211, Swing arm 212, Threaded cap 213, Threaded connection flange 214, Support square tube 22, Support plate 23, Through hole 231, Support cylinder 24, Elastic expansion pin 3, Threaded connector 31, Center hole 311, Disc 312, Threaded column 313, Mounting nut 314, Lifting column 32, Column 321, Limiting disc 322, Supporting disc 323, Limiting nut 324, Melon-shaped spring plate 33, Tension rope 34, Guide wheel 35, Plumb bob 36, Rigid connection rope 361, Drive mechanism 4, Drive motor 41, Drive gear 42, Driven gear 43, Rotating shaft 5, Rotating cam 51, Support arm 52, Gear set 53, Waterjet cutting robot 6, Frame 7, Support leg 71. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] Example 1: like Figure 1 As shown, a method for processing a thermal composite sound insulation material for automobile tires includes the following steps: Step a) Mounting: Mount the composite component 10 onto the positioning fixture I installed above the waterjet cutting groove 1. The positioning fixture I includes a frame 2 and elastic expansion pins 3. The elastic expansion pins 3 are protruding and mounted on the frame 2. The frame 2 supports the composite component 10. The elastic expansion pins 3 engage with the mounting holes 101 on the composite component 10 to initially position the composite component 10. Specifically, multiple sets of elastic expansion pins 3 are provided. The specific number can be any integer such as 5 sets, 6 sets, or 7 sets. The number of elastic expansion pins 3 is adjusted according to the force distribution of the composite component 10 so that the composite component 10 can be accurately positioned by the insertion of the elastic expansion pins 3. Step b: Single swing locking. The drive mechanism 4 installed on the positioning fixture I drives the rotating shaft 5 to rotate. The rotating shaft 5 drives the skeleton 2 installed on it to rotate and swing, so that the composite component 10 is in an inclined state. Simultaneously, the elastic expansion pins 3 compress and expand, locking the composite component 10. Specifically, when the rotating shaft 5 drives the skeleton 2 to rotate and swing, the rotating shaft 5 is also connected through a rigid tension rope 34, which drives all the elastic expansion pins 3 to compress and expand, causing the melon-shaped spring plates 33 on the elastic expansion pins 3 to expand, thereby compressing the composite component 10. The limiting position ensures that the composite component is fixed on the frame 2 and will not detach or misalign due to the rotation and swing of the frame 2. In addition, it should be emphasized that the shape of the composite component 10 is similar to that of the tire cavity, that is, the composite component 10 is arched. As a result, when the composite component 10 is upright, it is difficult to accurately remove the burrs on both sides of the composite component 10 when water jet cutting is used to directly process them. For this purpose, the present invention uses the rotating shaft 5 to drive the frame 2 to rotate and swing. The purpose is to expose the edge of the composite component 10 to be cut, so that the burrs on the edge of the composite component 10 can be cut more easily. Step c: First-time flash cutting. The water cutting robot 6, located next to the water cutting groove 1, cuts the flash at the upper edge of the composite part 10 supported on the skeleton 2. Specifically, the working principle of the water cutting robot 6 is to pressurize ordinary water to tens to hundreds of MPa through a high-pressure pump. The high-pressure water passes through a specially designed fine nozzle (usually with a diameter of 0.1–0.5 mm), and the pressure potential energy is converted into kinetic energy to form a fine water jet with a speed of up to hundreds of meters per second. When the high-speed jet impacts the material surface, it generates a strong impact force and shear force, which directly destroys the molecular bonding force of the material, causing local erosion and peeling of the material, thereby achieving cutting. It should be emphasized here that the strength of the composite part 10 is much lower than that of the metal skeleton 2 and the tension rope 34. Therefore, the water cutting robot 6 only cuts the composite part 10 and does not cut the skeleton 2 and the tension rope 34. Step d, secondary swing locking: The drive mechanism 4 drives the rotating shaft 5 to rotate in the opposite direction. The rotating shaft 5 drives the skeleton 2 to swing in the opposite direction, causing the composite 10 to tilt in the opposite direction. The elastic expansion nail 3 is compressed and expanded again to lock the composite 10, so that the upper edge of the composite 10 switches. The working principle of step d is similar to that of step b, so it will not be described in detail. Step e, secondary flash cutting: the water jet cutting robot 6 cuts the upper edge flash of the switched composite part 10; Step f, unloading: After completing step e, the drive mechanism 4 drives the rotating shaft 5 to rotate in the opposite direction again, causing the skeleton 2 to swing back to the initial position, the elastic expansion nail 3 to release its compression and expansion, and the composite part 10 to detach from the skeleton 2 to complete the unloading.

[0025] Example 2: like Figures 2-3 As shown, with reference to Embodiment 1, an embodiment 2 of the present invention is described, which is used for the water cutting system in Embodiment 1. The water cutting system includes: a water cutting tank 1, a water cutting robot 6, and a positioning fixture I; The water cutting tank 1 is connected to an external circulating water device (not shown in the figure) via a return water pipe 11 at the bottom. The water cutting robot 6 is connected to the circulating water device via a high-pressure pump and a connecting pipe (not shown in the figure). The water cutting robot 6 sprays high-speed water to cut the composite part 10. Positioning fixture I is installed on the waterjet cutting tank 1. Positioning fixture I performs multi-point positioning loading on composite part 10, so that when waterjet cutting robot 6 cuts composite part 10, composite part 10 will not be misaligned, thus ensuring the stability and accuracy of composite part 10 during waterjet cutting.

[0026] like Figures 2-18 As shown, specifically, the positioning fixture I includes a frame 2, an elastic expansion pin 3, a drive mechanism 4, a rotating shaft 5, and a frame 7; The frame 7 is square-shaped, and two sets of rotating shafts 5 are provided. The rotating shafts 5 are mounted on the frame 7 in parallel rotation. Bearing seats are provided at the mounting positions of the rotating shafts 5 and the frame 7. The rotating shafts 5 are driven to rotate by the drive mechanism 4. The support legs 71 at the four corners of the frame 7 are connected to the waterjet cutting groove 1 by threaded fasteners. The drive mechanism 4 is mounted on the frame 7 and drives the rotating shafts 5 to rotate synchronously. The drive mechanism 4 consists of a drive motor 41, a drive gear 42, and a driven gear 43. The drive motor 41 is preferably a servo motor. The drive gear 42 is mounted on the motor shaft of the drive motor 41, and the driven gear 43 is sleeved on the corresponding rotating shaft 5. The drive motor 41 drives the driven gear 43 to rotate through the drive gear 42, thereby driving the rotating shaft 5 to rotate. Two sets of skeletons 2 are installed on each set of rotating shafts 5. Each set of skeletons 2 is provided with several sets of elastic expansion nails 3. Each set of skeletons 2 carries a set of composite parts 10. The mounting holes 101 on the composite parts 10 are connected to the corresponding elastic expansion nails 3 on the skeletons 2, so that the composite parts 10 are supported and carried by the skeletons 2.

[0027] like Figures 7-8As shown, each frame 2 includes a swing seat 21, a supporting square tube 22, a supporting plate 23, and a supporting cylinder 24. The swing seat 21 is mounted on the rotating shaft 5 and rotates synchronously with the rotating shaft 5. Specifically, a swing arm 212 is provided below the swing seat 21. The swing arm 212 is sleeved on the rotating shaft 5. The part of the rotating shaft 5 that engages with the swing arm 212 is threaded. The two sides of the swing arm 212 are locked by threaded caps 213 and threaded connecting flanges 214, so that the swing arm 212 is connected to the rotating shaft 5. The threaded connecting flange 214 is connected to the swing arm 212 by threaded parts. The supporting square tube 22 is mounted on the swing seat 21 to form a three-dimensional structure that matches the shape of the composite component 10, allowing the supporting square tube 22 to support the composite component 10. The supporting plate 23 is mounted on the supporting square tube 22 and supports the mounting hole 101 on the composite component 10. The supporting cylinder 24 is located at the outward protrusion of the mounting hole 101 on the composite component 10. The supporting cylinder 24 is connected to the corresponding supporting plate 23. It should be noted that the supporting cylinder 24 is not set to correspond to each set of supporting plates 23. Instead, the supporting cylinder 24 is adaptively selected to support the protruding mounting hole 101 when the mounting hole 101 on the composite component 10 is significantly protruding outward, thereby preventing the supporting plate 23 from being unable to support the mounting hole 101.

[0028] In addition, both the support plate 23 and the support cylinder 24 are provided with through holes 231 corresponding to the mounting hole 101. The elastic expansion nail 3 is installed at the through hole 231, the mounting hole 101 is fitted onto the elastic expansion nail 3, and the through hole 231 is used to pass through the tension rope 34.

[0029] like Figures 14-18 As shown, the elastic expansion nail 3 includes a threaded connector 31, a lifting column 32, a melon-shaped spring plate 33, and a tension rope 34; The threaded connector 31 is inserted into the corresponding through hole 231. The threaded connector 31 is fixedly installed, and a central hole 311 is opened at the central axis of the threaded connector 31. Specifically, the threaded connector 31 includes a disc portion 312 and a threaded post 313. The diameter of the disc portion 312 is larger than the diameter of the through hole 231, and the disc portion 312 covers the through hole 231. The threaded post 313 is inserted into the through hole 231, and a mounting nut 314 is threadedly connected to the threaded post 313. The mounting nut 314 locks the threaded connector 31 onto the corresponding support plate 23 or support cylinder 24. The lifting column 32 passes through the central hole 311 and slides along the central hole 311. The melon-shaped spring plate 33 is sleeved on the lifting column 32 and abuts against the lifting column 32 and the threaded connector 31. Specifically, the lifting column 32 includes a column body 321, a limiting plate 322, a support plate 323, and a limiting nut 324. The column body 321 is cylindrical and passes through the central hole 311. The limiting plate 322 is disposed between the column body 321 and the threaded connector 31. At the end of the tension rope 34, the limiting disc 322 abuts against the threaded connector 31 to limit the column 321 and prevent it from detaching from the central hole 311; the support disc 323 is located at the end of the column 321 that abuts against the melon-shaped spring sheet 33, and supports the melon-shaped spring sheet 33; the limiting nut 324 is threaded onto the support disc 323, and engages with the support disc 323 to lock the melon-shaped spring sheet 33 in place. The tension rope 34 is connected to the lifting column 32 and the rotating shaft 5. When the rotating shaft 5 rotates, the lifting column 32 is driven to slide through the tension rope 34, thereby compressing and expanding the melon-shaped spring plate 33. After the melon-shaped spring plate 33 expands, it will increase the contact surface with the composite component 10, thereby locking and limiting the composite component 10.

[0030] like Figure 18 As shown, the elastic expansion nail 3 also includes symmetrically arranged guide wheels 35. The guide wheels 35 are mounted on the threaded connector 31 through roller seats 351, and the guide wheels 35 guide the tension rope 34. When the tension rope 34 drives the lifting column 32 to move, the guide wheels 35 rotate to guide the tension rope 34 and prevent the tension rope 34 from becoming misaligned.

[0031] like Figures 11-13 As shown, the principle of compression and expansion of the elastic expansion nail 3 by the rotation of the rotating shaft 5 is as follows: the tension ropes 34 in the elastic expansion nail 3 are all connected to the plumb bob 36, which is slidably installed on the sleeve 211 of the swing seat 21. Furthermore, a rotating cam 51 is installed above the rotating shaft 5. The rotating cam 51 is connected to the plumb bob 36 via a rigid connecting rope 361. When the rotating shaft 5 drives the frame 2 to rotate and swing, it synchronously drives the rotating cam 51 to rotate and swing in the opposite direction, pulling the plumb bob 36 to slide downward, so that all the elastic expansion nails 3 are compressed and expanded synchronously.

[0032] Specifically, the rotating cam 51 is rotatably mounted on the support arm 52, the rotating shaft 5 is rotatably passed through the support arm 52, and the rotating cam 51 and the rotating shaft 5 are connected by a gear set 53.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for processing automotive tire thermal composite sound insulation material, characterized in that, Includes the following steps: Step a, mounting and positioning: The composite part (10) is mounted onto the positioning fixture (I) installed above the water jet groove (1). The positioning fixture (I) includes a frame (2) and an elastic expansion pin (3). The elastic expansion pin (3) is protruding and mounted on the frame (2). The frame (2) supports the composite part (10). The elastic expansion pin (3) fits into the mounting hole (101) on the composite part (10) to initially position the composite part (10). Step b, one swing lock: the drive mechanism (4) installed on the positioning fixture (I) drives the rotating shaft (5) to rotate. The rotating shaft (5) drives the skeleton (2) installed on it to rotate and swing, so that the composite part (10) is in an inclined state. Simultaneously, the elastic expansion nail (3) compresses and expands to lock the composite part (10). Step c, First trimming of the burr: The water cutting robot (6) set next to the water cutting groove (1) trims the burr at the upper edge of the composite (10) supported on the skeleton (2); Step d, secondary swing locking, the driving mechanism (4) drives the rotating shaft (5) to rotate in the opposite direction, the rotating shaft (5) drives the skeleton (2) to swing in the opposite direction, so that the composite (10) tilts in the opposite direction, the elastic expansion nail (3) is compressed and expanded again, and the composite (10) is locked, so that the upper edge of the composite (10) switches; Step e, secondary flash cutting, the water jet cutting robot (6) cuts the upper edge flash of the switched composite part (10); Step f, unloading: After completing step e, the drive mechanism (4) drives the rotating shaft (5) to rotate in the opposite direction again, so that the skeleton (2) swings back to the initial position, the elastic expansion nail (3) releases its compression and expansion, and the composite part (10) detaches from the skeleton (2) to complete the unloading.

2. The processing method for automotive tire thermal composite sound insulation material according to claim 1, characterized in that: In step a, the skeleton (2) includes a swing seat (21), a supporting square tube (22), a supporting plate (23), and a supporting cylinder (24). The swing seat (21) is mounted on the rotating shaft (5) and rotates synchronously with the rotating shaft (5). The supporting square tube (22) is mounted on the swing seat (21). The supporting plate (23) is mounted on the supporting square tube (22) and supports the mounting hole (101) on the composite (10). The supporting cylinder (24) is located at the outward protrusion of the mounting hole (101) on the composite (10) and is connected to the corresponding supporting plate (23).

3. The processing method for automotive tire thermal composite sound insulation material according to claim 2, characterized in that, In step a, both the support plate (23) and the support cylinder (24) are provided with through holes (231) corresponding to the mounting hole (101), and the elastic expansion nail (3) is installed at the through hole (231).

4. The processing method for automotive tire thermal composite sound insulation material according to claim 3, characterized in that: In step a, the elastic expansion nail (3) includes a threaded connector (31), a lifting column (32), a melon-shaped spring plate (33), and a tension rope (34). The threaded connector (31) is inserted into the corresponding through hole (231). The threaded connector (31) is fixedly installed, and a central hole (311) is provided at the central axis of the threaded connector (31). The lifting column (32) passes through the central hole (311) and is slidably disposed along the central hole (311); The melon-shaped spring sheet (33) is sleeved on the lifting column (32), and the melon-shaped spring sheet (33) abuts against the lifting column (32) and the threaded connector (31); The tension rope (34) is connected to the lifting column (32) and the rotating shaft (5). The rotating shaft (5) rotates, and the lifting column (32) slides through the tension rope (34), compressing and expanding the melon-shaped spring plate (33) to lock and limit the composite part (10).

5. The processing method for automotive tire thermal composite sound insulation material according to claim 4, characterized in that: The threaded connector (31) includes a disc (312) and a threaded post (313). The diameter of the disc (312) is larger than the diameter of the through hole (231). The threaded post (313) passes through the through hole (231). A mounting nut (314) is threaded onto the threaded post (313) and locks the threaded connector (31).

6. The processing method for automotive tire thermal composite sound insulation material according to claim 4, characterized in that: The lifting column (32) includes a column body (321), a limiting plate (322), a support plate (323), and a limiting nut (324). The column (321) is cylindrical in shape; The limiting plate (322) is disposed at the end where the column (321) connects to the tension rope (34). The limiting plate (322) abuts against the threaded connector (31) to limit the column (321). The support plate (323) is located at the end of the column (321) that abuts against the melon-shaped spring sheet (33), and the support plate (323) supports and installs the melon-shaped spring sheet (33). The limiting nut (324) is threaded onto the support plate (323). The limiting nut (324) cooperates with the support plate (323) to lock the melon-shaped spring sheet (33).

7. The processing method for automotive tire thermal composite sound insulation material according to claim 4, characterized in that: The elastic expansion nail (3) also includes symmetrically arranged guide wheels (35), which are mounted on the threaded connector (31) via roller seats (351), and guide the tension rope (34) between the guide wheels (35).

8. The processing method for automotive tire thermal composite sound insulation material according to claim 4, characterized in that: In steps b and d, the tension ropes (34) in the elastic expansion nail (3) are all connected to the plumb bob (36), which is slidably mounted on the sleeve (211) of the swing seat (21); A rotating cam (51) is installed above the rotating shaft (5). The rotating cam (51) is connected to the plumb bob (36) via a connecting rope (361). When the rotating shaft (5) drives the skeleton (2) to rotate and swing, it synchronously drives the rotating cam (51) to rotate and swing in the opposite direction, pulling the plumb bob (36) to slide downward, so that all the elastic expansion nails (3) are compressed and expanded synchronously.

9. The processing method for automotive tire thermal composite sound insulation material according to claim 8, characterized in that: The rotating cam (51) is rotatably mounted on the support arm (52), and the rotating shaft (5) is rotatably passed through the support arm (52). The rotating cam (51) and the rotating shaft (5) are connected by a gear set (53).

10. The processing method for automotive tire thermal composite sound insulation material according to claim 1, characterized in that: The rotating shaft (5) is rotatably mounted on the frame (7) of the positioning fixture (I), and the support legs (71) at the four corners of the frame (7) are connected to the water cutting groove (1) by threaded fasteners. The drive mechanism (4) is mounted on the frame (7) and drives the rotating shaft (5) to rotate synchronously.

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