Punching and trimming single punching die for brake disc and brake wheel of automobile

Abstract

The invention discloses a punching and trimming single punching die for a brake disc and a brake wheel of an automobile, which relates to the technical field of punching dies and comprises a fixing rod, an upper die unit, an upper die assembly arranged at the top of the fixing rod and used for punching downwards, a lower die unit and a collecting assembly arranged at the bottom of the fixing rod and used for treating waste after punching of the brake disc. An operator places the brake disc on the outer diameter of the fixing assembly, in the downward moving driving process of the upper die assembly, the fixing assembly fixes the brake disc, drives the brake disc to move downwards and extrudes the punching assembly, a movable punch accurately moves to be attached to the outer diameter of the brake disc for punching, meanwhile, the upper die assembly extrudes the fixing assembly and the punching assembly into the collecting assembly, and the collecting assembly is used for collecting the brake disc. The movable punch is driven by the punching piece to complete punching and trimming, waste generated by punching is guided by the fixing assembly to fall into the collecting assembly in a unified mode, burr accumulation and die damage are effectively avoided, the maintenance cost is reduced, and the equipment stability is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of stamping dies, and particularly to a single stamping die for punching and trimming the brake disc and brake wheel of an automobile. Background Art

[0002] Stamping is a pressure processing method that applies pressure to materials using a die installed on a press at room temperature to cause separation or plastic deformation, thereby obtaining the required parts. A stamping die is a special process equipment for processing materials into parts or semi-finished products in cold stamping.

[0003] After stamping by traditional stamping equipment, the burrs of the stamped materials are easily accumulated and block the blanking groove, damaging the stamping die, increasing the maintenance cost of the stamping die, reducing the production efficiency of the stamping process, and conventional stamping equipment cannot perform one-time stamping and forming on the peripheral slot holes of the brake wheel. Often, multiple sets of evenly distributed slot holes with the same specifications also need to be stamped multiple times, resulting in a long stamping production process for the brake disc and brake wheel, low utilization rate of the stamping equipment, and multiple stampings may also lead to a decrease in the accuracy of the formed holes, making it difficult to meet the high-precision and high-efficiency requirements of modern manufacturing. Summary of the Invention

[0004] In view of the problems existing in the above-mentioned existing single stamping die for punching and trimming the brake disc and brake wheel of an automobile, the present invention is proposed.

[0005] Therefore, the present invention provides a single stamping die for punching and trimming the brake disc and brake wheel of an automobile, and its purpose is to solve the problem that conventional stamping equipment cannot perform one-time stamping and forming on the peripheral slot holes of the brake wheel, and often multiple sets of evenly distributed slot holes with the same specifications also need to be stamped multiple times.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: a fixed rod; An upper die unit, including an upper die assembly arranged at the top of the fixed rod for downward stamping; A lower die unit, including a collection assembly arranged at the bottom of the fixed rod for processing the waste after punching the brake disc, a punching assembly arranged at the top of the collection assembly for punching and trimming the brake disc, and a fixing assembly arranged at the top of the punching assembly for stably fixing the brake disc during punching. The fixing assembly cooperates with the upper die assembly to fix the brake disc before punching and ensure the stability of the brake disc during punching and trimming.

[0007] As a preferred solution of the single stamping die for punching and trimming the brake disc and brake wheel of the present invention, among them: the upper die assembly includes an upper die assembly arranged at the top of the fixed rod, a hydraulic rod arranged at the top of the upper die assembly, a pressing plate arranged at the output end of the hydraulic rod, and a stamping part arranged at the bottom of the pressing plate, and the pressing plate is slidably connected.

[0008] As a preferred embodiment of the single punching die for punching and trimming the brake disc and brake wheel of the vehicle according to the present invention, wherein: a fixing plate is provided at the bottom of the top plate, and the output end of the hydraulic rod penetrates and is slidably connected to the fixing plate.

[0009] As a preferred embodiment of the single punching die for punching and trimming the brake disc and brake wheel of the vehicle according to the present invention, wherein: the collecting assembly includes a bottom plate provided at the bottom of the fixing rod, a collecting member provided at the bottom of the bottom plate, and a support plate provided at the bottom of the collecting member.

[0010] As a preferred embodiment of the single punching die for punching and trimming the brake disc and brake wheel of the vehicle according to the present invention, wherein: the punching assembly includes a fixing member provided on the top of the bottom plate, a moving groove provided inside the fixing member, a moving punch slidably provided inside the moving groove, and a punching member provided on the moving punch, and the punching member is fixedly connected to the bottom plate.

[0011] As a preferred embodiment of the single punching die for punching and trimming the brake disc and brake wheel of the vehicle according to the present invention, wherein: a rotating shaft is provided on one side of the moving punch, a linkage rod is rotatably provided inside the rotating shaft, the other end of the linkage rod is slidably and rotatably provided with a sliding member, and the sliding member is slidably connected to the fixing member.

[0012] As a preferred embodiment of the single punching die for punching and trimming the brake disc and brake wheel of the vehicle according to the present invention, wherein: a first reset spring is provided inside the bottom plate, and the top of the first reset spring is connected to the sliding member.

[0013] As a preferred embodiment of the single punching die for punching and trimming the brake disc and brake wheel of the vehicle according to the present invention, wherein: a guiding member is provided on the top of the sliding member, and the guiding member cooperates with the moving punch.

[0014] As a preferred embodiment of the single punching die for punching and trimming the brake disc and brake wheel of the vehicle according to the present invention, wherein: the collecting assembly includes a fixing ring provided on the top of the sliding member, a blanking groove provided inside the fixing ring, a fixing block provided on the top of the fixing ring, and a pressing block slidably provided on the top of the fixing block.

[0015] As a preferred embodiment of the single punching die for punching and trimming the brake disc and brake wheel of the vehicle according to the present invention, wherein: L-shaped fixing rods are slidably provided on both sides of the fixing block, a connecting plate is provided at one end of the L-shaped fixing rod, a second reset spring is provided at the other end of the connecting plate, and the other end of the second reset spring is connected to the connecting plate on the other side.

[0016] The beneficial effects of the present invention are as follows: the operator places the brake disc on the outer diameter of the fixed component, and during the downward driving process of the upper die component, the fixed component fixes the brake disc and drives it to move downward, squeezes the punching component, and makes the movable punch move accurately to fit the outer diameter of the brake disc for punching. At the same time, the upper die component squeezes the fixed component and the punching component into the collecting component, and the movable punch completes the punching and trimming under the drive of the punching component. The waste generated by the punching falls into the collecting component uniformly through the guidance of the fixed component, which effectively avoids burr accumulation and mold damage, reduces maintenance costs, improves equipment stability, and can complete the forming around the outer diameter of the brake disc with one impact, thereby improving production efficiency, reducing dimensional accuracy deviation caused by multiple stampings, and improving product quality. After the punching and trimming are completed, the upper die component moves upward to drive the punching component and the fixed component to reset, and the fixed component releases the fixation of the brake disc, which is convenient for the operator to quickly pick up and unload parts, simplifies the operation process, and solves the problems of burr accumulation, mold damage, low efficiency and accuracy deviation caused by multiple stampings in traditional stamping equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 The present invention is a schematic diagram of the overall structure of a single punching die for punching and trimming a brake disc and brake wheel of an automobile.

[0019] Figure 2 The figure is a side structural schematic diagram of a single punching die for punching and trimming a brake disc and a brake wheel of an automobile according to the present invention.

[0020] Figure 3 The present invention is a schematic diagram of the structure of the upper die assembly of the single punch die for punching and trimming the brake wheel of an automobile brake disc.

[0021] Figure 4 The present invention is a schematic diagram of the structure of the lower die assembly of the single punch die for punching and trimming the brake wheel of an automobile brake disc.

[0022] Figure 5 The figure is a schematic diagram of the internal structure of a single punch die for punching and trimming a brake disc and brake wheel of an automobile according to the present invention.

[0023] Figure 6 The present invention is a single punch die for punching and trimming of automobile brake disc brake wheel Figure 5 An enlarged schematic diagram of point A.

[0024] Figure 7 The present invention is a schematic diagram of the cross-sectional structure of a single punching die for punching and trimming a brake wheel of an automobile brake disc.

[0025] Figure 8 This is an enlarged schematic view of part B of the single punching die for punching and trimming the brake disc and brake wheel of the present invention. Figure 7 of the single punching die for punching and trimming the brake disc and brake wheel of the present invention.

[0026] Figure 9 This is a schematic view of the internal sectional structure of the single punching die for punching and trimming the brake disc and brake wheel of the present invention.

[0027] Figure 10 This is an enlarged schematic view of part C of the single punching die for punching and trimming the brake disc and brake wheel of the present invention. Figure 9 of the single punching die for punching and trimming the brake disc and brake wheel of the present invention.

[0028] Explanation of reference numerals: 100, fixed rod; 200, upper die unit; 201, upper die assembly; 2011, top plate; 2012, hydraulic rod; 2013, fixing plate; 2014, pressing plate; 2015, stamping part; 300, lower die unit; 301, collection assembly; 3011, bottom plate; 3012, collection part; 3013, support plate; 302, punching assembly; 3021, fixing part; 3022, moving groove; 3023, moving punch; 3024, punching part; 3025, rotating shaft; 3026, linkage rod; 3027, first reset spring; 3028, sliding part; 3029, guiding part; 303, fixing assembly; 3031, fixing ring; 3032, blanking groove; 3033, fixing block; 3034, L-shaped fixing rod; 3035, connecting plate; 3036, second reset spring; 3037, pressing block. Detailed Description of the Invention

[0029] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific embodiments of the present invention will be given with reference to the accompanying drawings of the specification.

[0030] Example 1, referring to Figure 1 - Figure 2 , which is the first embodiment of the present invention, provides a single punching die for punching and trimming the brake disc and brake wheel of an automobile. This device includes: a fixed rod 100, an upper die unit 200, and a lower die unit 300.

[0031] Among them, the fixed rod 100; The upper die unit 200 includes an upper die assembly 201 arranged at the top of the fixed rod 100 for downward punching; The lower die unit 300 includes a collection assembly 301 disposed at the bottom of the fixed rod 100 for processing the waste after punching the brake disc, a punching assembly 302 disposed on top of the collection assembly 301 for punching and trimming the brake disc, and a fixing assembly 303 disposed on top of the punching assembly 302 for stabilizing the brake disc during punching. The fixing assembly 303 cooperates with the upper die assembly 201 to fix the brake disc before punching and ensure the stability of the brake disc during punching and trimming. When punching and trimming the brake disc, the operator places the brake disc on the outer diameter of the fixing assembly 303 to sleeve it. Then the upper die assembly 201 starts to move downward, begins to squeeze the fixing assembly 303. When squeezing the fixing assembly 303, the fixing assembly 303 starts to fix the brake disc on the outer diameter and makes the brake disc move downward together with the fixing assembly 303, begins to squeeze the punching assembly 302, causing the moving punch 3023 inside the punching assembly 302 to move, so that the impact end of the moving punch 3023 moves and fits against the outer diameter of the brake disc, and starts to prepare for punching the brake disc. At the same time, the upper die assembly 201 squeezes the fixing assembly 303 and the punching assembly 302 into the interior of the collection assembly 301, so that the moving punch 3023 starts to punch and trim the outer diameter of the brake disc under the drive of the punching member 3024, and the waste material impacted down is also squeezed into the interior of the fixing assembly 303. Under the guidance of the fixing assembly 303, the waste material generated by the impact moves downward, and the waste material uniformly falls into the interior of the collection assembly 301, completing the collection of the waste material after punching, avoiding the situation that the burrs of the stamping material are easily accumulated and block the blanking chute, and damaging the die. At the same time, through a single impact, the periphery of the outer diameter of the brake disc can be directly impacted and formed.

[0032] After the punching assembly 302 finishes punching and trimming the brake disc, the upper die assembly 201 moves upward, causing the punching assembly 302 and the fixing assembly 303 to reset upward from the interior of the collection assembly 301. During the reset process, the punching assembly 302 returns to its original position, and the fixing assembly 303 also releases the fixation of the brake disc, allowing the operator to directly remove and take out the brake disc.

[0033] During use, when punching and trimming the brake disc, the operator places the brake disc on the outer diameter of the fixing component 303 to sleeve it. Then, the upper die component 201 starts to move downward, and begins to extrude the fixing component 303. When extruding the fixing component 303, the fixing component 303 starts to fix the brake disc on the outer diameter, and makes the brake disc move downward continuously with the fixing component 303, and begins to extrude the punching component 302, so that the moving punch 3023 inside the punching component 302 moves, so that the impact end of the moving punch 3023 moves and fits on the outer diameter of the brake disc, and begins to prepare for punching the brake disc. At the same time, the upper die component 201 extrudes the fixing component 303 and the punching component 302 into the inside of the collecting component 301, so that the moving punch 3023, under the drive of the punching part 3024, starts to punch and trim the outer diameter of the brake disc, and the scrap material impacted down is also extruded into the inside of the fixing component 303, and under the guidance of the fixing component 303, the scrap material generated by the impact moves downward, so that the scrap material uniformly falls into the inside of the collecting component 301, completing the collection of the scrap material after punching, avoiding the situation that the burrs of the stamping material are easily accumulated and block the blanking groove, and damaging the mold. At the same time, through one impact, the periphery of the outer diameter of the brake disc can be directly impact-formed.

[0034] After the punching component 302 finishes punching and trimming the brake disc, the upper die component 201 moves upward, so that the punching component 302 and the fixing component 303 start to reset upward from the inside of the collecting component 301. During the reset process, the punching component 302 returns to its original position, and the fixing component 303 also releases the fixation of the brake disc, so that the operator can directly take and unload the brake disc, effectively avoiding burr accumulation and mold damage, reducing the maintenance cost, improving the equipment stability, and can complete the forming of the periphery of the outer diameter of the brake disc with one impact, improving the production efficiency, reducing the dimensional accuracy deviation caused by multiple stamping, and improving the product quality.

[0035] Example 2, refer to Figure 1 - Figure 3, which is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is as follows: The upper die assembly 201 includes the upper die assembly 201 disposed at the top of the fixed rod 100, the hydraulic rod 2012 disposed at the top of the upper die assembly 201, the pressing plate 2014 disposed at the output end of the hydraulic rod 2012, and the stamping part 2015 disposed at the bottom of the pressing plate 2014. The pressing plate 2014 is slidably connected to the fixed rod 100. A fixing plate 2013 is disposed at the bottom of the top plate 2011, and the fixing plate 2013 penetrates and is slidably connected to the output end of the hydraulic rod 2012. Before punching and trimming the brake disc, after the operator places the brake disc to be punched on the outer diameter of the fixing assembly 303, the hydraulic rod 2012 at the top of the top plate 2011 starts to work and extends downward, so that the pressing plate 2014 starts to slide downward along the outer diameter of the fixed rod 100. At the same time, the stamping part 2015 also starts to move downward to start squeezing and closing the fixing assembly 303.

[0036] During the use process, before punching and trimming the brake disc, after the operator places the brake disc to be punched on the outer diameter of the fixing assembly 303, the hydraulic rod 2012 at the top of the top plate 2011 starts to work and extends downward, so that the pressing plate 2014 starts to slide downward along the outer diameter of the fixed rod 100. At the same time, the stamping part 2015 also starts to move downward to start squeezing and closing the fixing assembly 303, enabling the brake disc to be squeezed and fixed and providing the driving force when punching and trimming the brake disc. During the downward movement drive of the upper die assembly 201, the fixing assembly 303 fixes the brake disc and drives it downward, squeezing the punching assembly 302, enabling precise movement and fitting along the outer diameter of the brake disc for punching, ensuring stability during the punching and trimming of the brake disc.

[0037] The remaining structures are the same as those in Embodiment 1.

[0038] Embodiment 3, refer to Figure 1 - Figure 10, which is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is as follows: The fixing component 303 includes a fixing ring 3031 disposed on the top of the sliding member 3028, a blanking groove 3032 disposed inside the fixing ring 3031, a fixing block 3033 disposed on the top of the fixing ring 3031, and a pressing block 3037 slidably disposed on the top of the fixing block 3033. L-shaped fixing rods 3034 are slidably disposed on both sides of the fixing block 3033. One end of the L-shaped fixing rod 3034 is provided with a connecting plate 3035. The other end of the connecting plate 3035 is provided with a second return spring 3036, and the other end of the second return spring 3036 is connected to the connecting plate 3035 on the other side. After placing the brake disc on the outer diameter of the fixing ring 3031, the upper die assembly 201 starts to drive downward for mold closing, and starts to squeeze the pressing block 3037, causing the pressing block 3037 to move into the fixing block 3033. At the same time, the L-shaped fixing rods 3034 on both sides are squeezed, causing the L-shaped fixing rods 3034 to slide out of the fixing block 3033. And under the squeezing of the upper die assembly 201, the L-shaped fixing rods 3034 on both sides gradually fit on the top of the brake disc. And under the squeezing of the upper die assembly 201, the brake disc starts to be fixed, so that the brake disc can be stably fixed on the outer diameter of the fixing ring 3031.

[0039] Compared with Embodiment 2, further, the punching assembly 302 includes a fixing member 3021 disposed on the top of the bottom plate 3011, a moving groove 3022 disposed inside the fixing member 3021, a moving punch 3023 slidably disposed inside the moving groove 3022, and a punching member 3024 disposed on the moving punch 3023, and the punching member 3024 is fixedly connected to the bottom plate 3011. A rotating shaft 3025 is disposed on one side of the moving punch 3023, a linkage rod 3026 is rotatably disposed inside the rotating shaft 3025, and the other end of the linkage rod 3026 is slidably and rotatably provided with a sliding member 3028, and the sliding member 3028 is slidably connected to the fixing member 3021. A first reset spring 3027 is disposed inside the bottom plate 3011, and the top of the first reset spring 3027 is connected to the sliding member 3028. A material guiding member 3029 is disposed on the top of the sliding member 3028, and the material guiding member 3029 cooperates with the moving punch 3023. The collecting assembly 301 includes a bottom plate 3011 disposed at the bottom of the fixing rod 100, a collecting member 3012 disposed at the bottom of the bottom plate 3011, and a support plate 3013 disposed at the bottom of the collecting member 3012. After the brake disc on the outer diameter of the fixing ring 3031 is fixed by the L-shaped fixing rod 3034, the upper die assembly 201 continues to press the pressing block 3037, so that the fixing block 3033 presses the fixing ring 3031, so that the fixing ring 3031 presses the first reset spring 3027 inside the fixing member 3021 with the sliding member 3028. And during the process that the sliding member 3028 is pressed and moves downward, one end of the linkage rod 3026 starts to rotate and move inside the sliding member 3028, and rotates and moves downward together with the sliding member 3028, so that the rotating shaft 3025 at the other end of the linkage rod 3026 also rotates and drives the moving punch 3023 along the moving groove 3022 inside the fixing member 3021. During this process, the moving punch 3023 also cooperates with the punching member 3024 to start punching and trimming the outer diameter of the brake disc, and all the waste materials generated by punching are all impacted into the material discharging groove 3032, and all the waste materials generated by the impact are guided by the material guiding member 3029 inside the material discharging groove 3032 and fall into the collecting member 3012 for unified collection, so as to avoid the waste materials generated by the impact remaining on the surface of the fixing member 3021 and affecting the next punching.

[0040] After the punching and trimming are completed, the upper die assembly 201 starts to move upward, so as to relieve the extrusion on the fixing ring 3031 and the sliding member 3028. Under the action of the first reset spring 3027, the sliding member 3028 starts to drive the fixing ring 3031 to move upward and return to the original position, and the pressing block 3037 is also relieved of the extrusion. Under the contraction of the second reset spring 3036, the pressing block 3037 is pressed by the L-shaped fixing rod 3034 and moves upward to return to the original position, so as to release the fixation of the brake disc, and then the brake disc is taken out.

[0041] During the use process, after the brake disc on the outer diameter of the fixing ring 3031 is fixed by the L-shaped fixing rod 3034, the upper die assembly 201 continues to press the pressing block 3037, so that the fixing block 3033 presses the fixing ring 3031, and the fixing ring 3031 drives the sliding part 3028 to press against the first return spring 3027 inside the fixing part 3021. And during the process that the sliding part 3028 is pressed and moves downward, one end of the linkage rod 3026 starts to rotate and move inside the sliding part 3028, and rotates and moves together with the sliding part 3028 toward the bottom, so that the rotating shaft 3025 at the other end of the linkage rod 3026 also rotates and drives the moving punch 3023 to move along the moving groove 3022 inside the fixing part 3021. During this process, the moving punch 3023 also starts to punch and trim the outer diameter of the brake disc in cooperation with the punching part 3024, and all the waste materials generated by punching are all impacted into the inside of the blanking groove 3032, and all the waste materials generated by the impact are guided by the guiding part 3029 inside the blanking groove 3032 and fall into the inside of the collecting part 3012 for unified collection, so as to avoid the waste materials generated by the impact remaining on the surface of the fixing part 3021 and affecting the next punching.

[0042] After the punching and trimming are completed, the upper die assembly 201 starts to move upward, so as to relieve the extrusion on the fixing ring 3031 and the sliding part 3028. Under the action of the first return spring 3027, the sliding part 3028 starts to drive the fixing ring 3031 to move upward and return to the original position. And the pressing block 3037 is also relieved of the extrusion. Under the contraction of the second return spring 3036, the pressing block 3037 is pressed by the L-shaped fixing rod 3034 and moves upward to return to the original position, so as to relieve the fixation of the brake disc, and then the brake disc is taken out. The upper die assembly 201 presses the fixing assembly 303 and the punching assembly 302 into the collecting assembly 301. The moving punch 3023 completes the punching and trimming under the drive of the punching part 3024. The waste materials generated by punching are guided by the fixing assembly 303 and uniformly fall into the collecting assembly 301, effectively avoiding the accumulation of burrs and the damage of the die, reducing the maintenance cost, improving the stability of the equipment, and can complete the forming around the outer diameter of the brake disc with one impact, improving the production efficiency, reducing the dimensional accuracy deviation caused by multiple stamping, and improving the product quality.

[0043] The rest of the structure is the same as that of Embodiment 2.

[0044] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A single punching die for punching and trimming the brake disc and brake wheel of an automobile, characterized in that: Comprising: Fixed rod (100); Upper die unit (200), including an upper die assembly (201) arranged at the top of the fixed rod (100) for downward stamping; Lower die unit (300), including a collection assembly (301) arranged at the bottom of the fixed rod (100) for processing the waste after punching the brake disc, a punching assembly (302) arranged on top of the collection assembly (301) for punching and trimming the brake disc, and a fixing assembly (303) arranged on top of the punching assembly (302) for maintaining the stability of the brake disc in the punched state. The fixing assembly (303) and the upper die assembly (201) cooperate with each other in the working state to realize the positioning of the brake disc before punching and ensure the stability of the brake disc in the punching and trimming state.

2. The single punching die for punching and trimming the brake disc and brake wheel of an automobile according to claim 1, wherein: The upper die assembly (201) includes an upper die assembly (201) arranged at the top of the fixed rod (100), a hydraulic rod (2012) arranged on top of the upper die assembly (201), a pressure plate (2014) arranged at the output end of the hydraulic rod (2012), and a stamping part (2015) arranged at the bottom of the pressure plate (2014), and the pressure plate (2014) is slidably connected to the fixed rod (100).

3. The punching and trimming single die for the brake disc and brake wheel of an automobile according to claim 2, wherein: A fixing plate (2013) is arranged at the bottom of the top plate (2011), and the fixing plate (2013) and the output end of the hydraulic rod (2012) penetrate and are slidably connected.

4. The single punching die for punching and trimming the brake disc and brake wheel of an automobile according to claim 3, characterized in that: The collection assembly (301) includes a bottom plate (3011) arranged at the bottom of the fixed rod (100), a collection part (3012) arranged at the bottom of the bottom plate (3011), and a support plate (3013) arranged at the bottom of the collection part (3012).

5. The single punching die for punching and trimming the brake disc and brake wheel of an automobile according to claim 4, characterized in that: The punching assembly (302) includes a fixing part (3021) arranged on top of the bottom plate (3011), a moving groove (3022) arranged inside the fixing part (3021), a moving punch (3023) slidably arranged inside the moving groove (3022), and a punching part (3024) arranged on the moving punch (3023), and the punching part (3024) is fixedly connected to the bottom plate (3011).

6. The single punching die for punching and trimming the brake disc and brake wheel of an automobile according to claim 5, characterized in that: A rotating shaft (3025) is arranged on one side of the moving punch (3023), a linkage rod (3026) is rotatably arranged inside the rotating shaft (3025), the other end of the linkage rod (3026) is slidably and rotatably provided with a sliding part (3028), and the sliding part (3028) is slidably connected to the fixing part (3021).

7. The single punching die for punching and trimming the brake disc and brake wheel of an automobile according to claim 6, characterized in that: A first return spring (3027) is arranged inside the bottom plate (3011), and the top of the first return spring (3027) is connected to the sliding part (3028).

8. The single punching die for punching and trimming the brake disc and brake wheel of an automobile according to claim 7, characterized in that: A material guiding part (3029) is arranged at the top of the sliding part (3028), and the material guiding part (3029) cooperates with the moving punch (3023).

9. The single punching die for punching and trimming the brake disc and brake wheel of an automobile according to claim 8, characterized in that: The fixing assembly (303) includes a fixing ring (3031) arranged at the top of the sliding part (3028), a blanking groove (3032) arranged inside the fixing ring (3031), a fixing block (3033) arranged at the top of the fixing ring (3031), and a pressing block (3037) slidably arranged on top of the fixing block (3033).

10. The single punching die for punching and trimming the brake disc and brake wheel of an automobile according to claim 9, characterized in that: On both sides of the fixed block (3033), there are L-shaped fixing rods (3034) arranged in a sliding manner. One end of the L-shaped fixing rod (3034) is provided with a connecting plate (3035). The other end of the connecting plate (3035) is provided with a second return spring (3036), and the other end of the second return spring (3036) is connected to the connecting plate (3035) on the other side.

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