Single punch die for punching and trimming brake disc of automobile

Abstract

The application discloses a single-punch die for punching and trimming of a brake disc of a brake disc brake wheel, and relates to the technical field of stamping dies.The single-punch die comprises a fixed rod, an upper die unit and a lower die unit.The upper die unit comprises an upper die assembly arranged on the top of the fixed rod and used for downward stamping; and the lower die unit comprises a collecting assembly arranged on the bottom of the fixed rod and used for processing waste after punching of the brake disc.The brake disc is placed on the outer diameter of a fixed assembly by an operator, the fixed assembly fixes the brake disc and drives the brake disc to move downward during the downward movement of the upper die assembly, the fixed assembly is extruded by the upper die assembly and the punching assembly, the movable punch is accurately moved to adhere to the outer diameter of the brake disc for punching, meanwhile, the fixed assembly and the punching assembly are extruded into the collecting assembly by the upper die assembly, the movable punch is driven by the punching member to complete punching and trimming, and the waste produced by punching is guided by the fixed assembly and uniformly falls into the collecting assembly, so that the accumulation of burrs and damage of the die are effectively avoided, the maintenance cost is reduced, and the stability of the equipment is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of stamping die, and particularly relates to a single stamping die for punching and trimming of automobile brake disc brake wheel. BACKGROUND

[0002] Stamping is a kind of pressure processing method that separates or plastically deforms materials by using a die installed on a press machine to apply pressure to the materials at room temperature, so as to obtain required parts. The stamping die is a kind of special process equipment for processing materials into parts or semi-finished products in cold stamping processing.

[0003] The traditional stamping equipment is prone to cause the material burr to be accumulated and blocked in the blanking groove after stamping, damage the stamping die, increase the maintenance cost of the stamping die, and reduce the production efficiency of the stamping process. Moreover, the conventional stamping equipment cannot perform one-time stamping forming on the peripheral groove of the brake wheel, and multiple groups of uniformly distributed grooves of the same specification also need to be stamped multiple times, which leads to long stamping production flow of the brake disc brake wheel, low utilization rate of the stamping equipment, and precision reduction of the formed holes due to multiple stamping, and it is difficult to meet the high-precision and high-efficiency requirements of modern manufacturing industry. SUMMARY

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

[0005] Therefore, the present application provides a single stamping die for punching and trimming of automobile brake disc brake wheel, which aims to solve the problem that the conventional stamping equipment cannot perform one-time stamping forming on the peripheral groove of the brake wheel, and multiple groups of uniformly distributed grooves of the same specification also need to be stamped multiple times.

[0006] To solve the above technical problems, the present application provides the following technical scheme: a fixed rod;

[0007] an upper die unit including an upper die assembly arranged at the top of the fixed rod for downward stamping;

[0008] a lower die unit including a collecting assembly arranged at the bottom of the fixed rod for processing the waste after the brake disc is punched, a punching assembly arranged at the top of the collecting assembly for punching and trimming the brake disc, and a fixing assembly arranged at the top of the punching assembly for stabilizing the brake disc during punching, and the fixing assembly is matched with the upper die assembly, so that the brake disc can be fixed before punching, and the stability of the brake disc during punching and trimming is ensured.

[0009] As a preferred scheme of the single stamping die for punching and trimming of automobile brake disc brake wheel, 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 in sliding connection.

[0010] As a preferred solution of the single punch die for punching and trimming automobile brake disc and brake wheel of the present invention, a fixing plate is provided at the bottom of the top plate, and the fixing plate penetrates and is slidably connected to the output end of the hydraulic rod.

[0011] As a preferred solution of the single punch die for punching and trimming automobile brake disc and brake wheel of the present invention, the collecting component includes a base plate arranged at the bottom of the fixing rod, a collecting piece arranged at the bottom of the base plate, and a supporting plate arranged at the bottom of the collecting piece.

[0012] As a preferred solution of the single punch die for punching and trimming automobile brake disc and brake wheel described in the present invention, the punching assembly includes a fixing part arranged on the top of the base plate, a movable groove arranged inside the fixing part, a movable punch slidingly arranged inside the movable groove, and a punching part arranged on the movable punch, and the punching part is fixedly connected to the base plate.

[0013] As a preferred solution of the single punch die for punching and trimming automobile brake disc and brake wheel described in the present invention, a rotating shaft is provided on one side of the movable punch, a linkage rod is provided for rotating inside the rotating shaft, a sliding part is provided for sliding and rotating at the other end of the linkage rod, and the sliding part is slidably connected to the fixed part.

[0014] As a preferred solution of the single punch die for punching and trimming automobile brake disc and brake wheel of the present invention, a return spring 1 is arranged inside the bottom plate, and the top of the return spring 1 is connected to the sliding part.

[0015] As a preferred solution of the single punch die for punching and trimming automobile brake disc and brake wheel of the present invention, a material guide is provided on the top of the sliding part, and the material guide cooperates with the movable punch.

[0016] As a preferred solution of the single punch die for punching and trimming automobile brake disc brake wheel described in the present invention, the collecting component includes a fixed ring arranged on the top of the sliding part, a discharge trough arranged inside the fixed ring, a fixed block arranged on the top of the fixed ring, and a pressure block slidably arranged on the top of the fixed block.

[0017] As a preferred solution of the single punch die for punching and trimming the automobile brake disc and brake wheel of the present invention, L-shaped fixing rods are slidably arranged on both sides of the fixing block, one end of the L-shaped fixing rod is provided with a connecting plate, the other end of the connecting plate is provided with a return spring 2, and the other end of the return spring 2 is connected to the connecting plate on the other side.

[0018] The beneficial effects of the present application are as follows: the brake disc is placed on the outer diameter of the fixing assembly by the operator, the fixing assembly fixes the brake disc and drives it to move downward during the driving process of the upper die assembly, extrudes the punching assembly, and makes the moving punch move accurately to fit the outer diameter of the brake disc for punching, at the same time, the upper die assembly extrudes the fixing assembly and the punching assembly to the inside of the collecting assembly, the moving punch completes the punching and trimming under the driving of the punching piece, the waste produced by punching is guided by the fixing assembly and falls into the collecting assembly uniformly, effectively avoiding the accumulation of burrs and the damage of the die, reducing the maintenance cost, improving the stability of the equipment, and the brake disc can be formed around the outer diameter by one impact, improving the production efficiency, reducing the size precision deviation caused by multiple stamping, improving the product quality, after the punching and trimming are completed, the upper die assembly moves upward to drive the punching assembly and the fixing assembly to reset, the fixing assembly releases the fixation of the brake disc, facilitating the operator to quickly take out the workpiece and simplify the operation process, solving the problems of burr accumulation, die damage, low efficiency and precision deviation caused by multiple stamping existing in the traditional stamping equipment. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] Figure 1 It is an overall structure schematic diagram of the single-punch die for punching and trimming of the automobile brake disc brake wheel.

[0021] Figure 2 It is a side structure schematic diagram of the single-punch die for punching and trimming of the automobile brake disc brake wheel.

[0022] Figure 3 It is a structure schematic diagram of the upper die assembly of the single-punch die for punching and trimming of the automobile brake disc brake wheel.

[0023] Figure 4 It is a structure schematic diagram of the lower die assembly of the single-punch die for punching and trimming of the automobile brake disc brake wheel.

[0024] Figure 5 It is an internal structure schematic diagram of the single-punch die for punching and trimming of the automobile brake disc brake wheel.

[0025] Figure 6 It is an enlarged schematic diagram of A of the single-punch die for punching and trimming of the automobile brake disc brake wheel. Figure 5

[0026] Figure 7 It is a cross-sectional structure schematic diagram of the single-punch die for punching and trimming of the automobile brake disc brake wheel. ​

[0027] Figure 8 The present invention is a single punch die for punching and trimming automobile brake disc brake wheel Figure 7 Enlarged schematic diagram of point B.

[0028] Figure 9 The figure is a schematic diagram of the internal cross-sectional structure of a single punch die for punching and trimming automobile brake disc and brake wheel according to the present invention.

[0029] Figure 10 The present invention is a single punch die for punching and trimming automobile brake disc brake wheel Figure 9 Enlarged structural diagram at C.

[0030] Explanation of reference numerals: 100, fixing 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, collecting assembly; 3011, bottom plate; 3012, collecting part; 3013, supporting plate; 302, punching assembly; 3021, fixing part; 3022, moving part Movable groove; 3023, movable punch; 3024, punching part; 3025, rotating shaft; 3026, linkage rod; 3027, return spring 1; 3028, sliding part; 3029, material guide part; 303, fixed component; 3031, fixed ring; 3032, discharge chute; 3033, fixed block; 3034, L-shaped fixing rod; 3035, connecting plate; 3036, return spring 2; 3037, pressure block. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0032] Example 1, reference Figure 1-Figure 2 , which is the first embodiment of the present invention, provides a single punch die for punching and trimming automobile brake disc brake wheel, and the device includes: a fixing rod 100, an upper die unit 200, and a lower die unit 300.

[0033] Among them, the fixed rod 100;

[0034] The upper die unit 200 includes an upper die assembly 201 disposed on the top of the fixing rod 100 for downward punching;

[0035] The lower die unit 300 includes a collecting assembly 301 arranged at the bottom of the fixing rod 100 for processing waste materials after punching the brake disc, a punching assembly 302 arranged at the top of the collecting assembly 301 for punching and trimming the brake disc, and a fixing assembly 303 arranged at the 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 and then the upper die assembly 201 starts to move downward and starts 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 causes the brake disc to continue to move downward together with the fixing assembly 303. The upper die assembly 201 squeezes the fixed assembly 303 and the punching assembly 302 into the collecting assembly 301, so that the movable punch 3023 starts punching and trimming the outer diameter of the brake disc under the drive of the punching part 3024, and the waste material impacted is also squeezed into the inside of the fixed assembly 303, and under the guidance of the fixed assembly 303, the waste material generated by the impact moves downward, so that the waste material falls uniformly into the inside of the collecting assembly 301, completing the collection of the waste material after the punching is completed, avoiding the burrs of the stamped material from accumulating and blocking the blanking chute, and damaging the mold. At the same time, the outer diameter of the brake disc can be directly impacted and formed by one impact.

[0036] After the punching assembly 302 completes the punching and trimming of the brake disc, the upper mold assembly 201 moves upward, causing the punching assembly 302 and the fixing assembly 303 to reset upward from the inside of the collecting 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 take out the brake disc.

[0037] During use, when punching and trimming the brake disc, the operator places the brake disc on the outer diameter of the fixing component 303 and then the upper die component 201 starts to move downward and starts to squeeze the fixing component 303. When squeezing the fixing component 303, the fixing component 303 starts to fix the brake disc on the outer diameter and causes the brake disc to continue to move downward along with the fixing component 303, and starts to squeeze the punching component 302, so that the movable punch 3023 inside the punching component 302 moves, so that the impact end of the movable 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 assembly 201 squeezes the fixed assembly 303 and the punching assembly 302 into the interior of the collecting assembly 301, so that the movable 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 that is impacted is also squeezed into the interior of the fixed assembly 303, and under the guidance of the fixed assembly 303, the waste material generated by the impact moves downward, so that the waste material falls uniformly into the interior of the collecting assembly 301, completing the collection of the waste material after the punching is completed, avoiding the burrs of the stamped material from easily accumulating and blocking the blanking chute, damaging the mold, and at the same time, the outer diameter of the brake disc can be directly impact-formed through one impact.

[0038] After the punching assembly 302 completes the punching and trimming of the brake disc, the upper mold assembly 201 moves upward, causing the punching assembly 302 and the fixing assembly 303 to reset upward from the inside of the collecting assembly 301. During the resetting 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 take and unload the brake disc, effectively avoiding burr accumulation and mold damage, reducing maintenance costs, and improving equipment stability. The outer diameter of the brake disc can be formed with one impact, thereby improving production efficiency, reducing dimensional accuracy deviations caused by multiple stampings, and improving product quality.

[0039] Example 2, reference Figure 1-Figure 3, which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: the upper die assembly 201 includes an upper die assembly 201 arranged on the top of the fixed rod 100, a hydraulic rod 2012 arranged on the 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, and a fixed plate 2013 is provided at the bottom of the top plate 2011, and the fixed plate 2013 penetrates and is slidably connected to the output end of the hydraulic rod 2012. Before punching and trimming the brake disc, the operator places the brake disc to be punched on the outer diameter of the fixed assembly 303, and the hydraulic rod 2012 on the top of the top plate 2011 starts to work and extends downward, so that the pressure plate 2014 starts to slide downward along the outer diameter of the fixed rod 100, and at the same time, the stamping part 2015 also starts to move downward, and starts to extrude and close the die on the fixed assembly 303.

[0040] During use, before punching and trimming the brake disc, the operator places the brake disc to be punched on the outer diameter of the fixing assembly 303, and the hydraulic rod 2012 on the top of the top plate 2011 starts to work and extends downward, so that the pressure plate 2014 starts to slide downward along the outer diameter of the fixing rod 100, and at the same time the stamping part 2015 also starts to move downward, and starts to extrude and close the mold of the fixing assembly 303, so that the brake disc can be extruded and fixed and the driving force for punching and trimming the brake disc is used. During the downward movement of the upper mold assembly 201, the fixing assembly 303 fixes the brake disc and drives it to move downward, squeezing the punching assembly 302, so that it can be accurately moved to fit the outer diameter of the brake disc for punching, ensuring stability when punching and trimming the brake disc.

[0041] The remaining structures are the same as those of Example 1.

[0042] Example 3, reference Figures 1-10, which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that: the fixing assembly 303 includes a fixing ring 3031 provided on the top of the sliding member 3028, a feeding trough 3032 provided inside the fixing ring 3031, a fixing block 3033 provided on the top of the fixing ring 3031, and a pressing block 3037 slidably provided on the top of the fixing block 3033. L-shaped fixing rods 3034 are slidably provided 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 other side. The upper mold assembly 201 starts to drive the mold downward to close the mold, and starts to squeeze the pressure block 3037 to move the pressure block 3037 toward the inside of the fixed block 3033. At the same time, the L-shaped fixing rods 3034 on both sides are squeezed to make the L-shaped fixing rods 3034 slide out from the inside of the fixed block 3033. Under the squeezing of the upper mold assembly 201, the L-shaped fixing rods 3034 on both sides gradually fit on the top of the brake disc. Under the squeezing of the upper mold assembly 201, the brake disc begins to be fixed so that the brake disc can be stably fixed on the outer diameter of the fixed ring 3031.

[0043] Compared with Example 2, further, the punching assembly 302 includes a fixing member 3021 arranged on the top of the base plate 3011, a movable groove 3022 arranged inside the fixing member 3021, a movable punch 3023 slidably arranged inside the movable groove 3022, and a punching member 3024 arranged on the movable punch 3023, and the punching member 3024 is fixedly connected to the base plate 3011, a rotating shaft 3025 is provided on one side of the movable punch 3023, and a linkage rod 3026 is provided for rotation inside the rotating shaft 3025, and the other end of the linkage rod 3026 is provided with a sliding and rotating The sliding member 3028 is slidably connected to the fixing member 3021. A return spring 3027 is provided inside the bottom plate 3011, and the top of the return spring 3027 is connected to the sliding member 3028. A material guide 3029 is provided on the top of the sliding member 3028, and the material guide 3029 cooperates with the moving punch 3023. The collecting assembly 301 includes a bottom plate 3011 provided at the bottom of the fixing rod 100, a collecting member 3012 provided at the bottom of the bottom plate 3011, and a support plate 3013 provided at the bottom of the collecting member 3012. After the brake disc is fixed on the outer diameter of the fixing ring 3031, the upper mold assembly 201 continues to squeeze the pressing block 3037, so that the fixing block 3033 squeezes the fixing ring 3031, so that the fixing ring 3031 and the sliding member 3028 are squeezed toward the return spring 3027 inside the fixing member 3021, and in the process of the sliding member 3028 being squeezed and moved downward, one end of the linkage rod 3026 begins to rotate and move adjustment inside the sliding member 3028, and rotates and adjusts toward the bottom together with the sliding member 3028, so that the other end of the linkage rod 3026 is pressed downward. The rotating shaft 3025 at the end also rotates and carries the movable punch 3023 along the movable groove 3022 inside the fixed part 3021. In the process, the movable punch 3023 also starts to punch and trim the outer diameter of the brake disc with the cooperation of the punching part 3024, and all the waste generated by the punching is impacted into the inside of the discharge trough 3032. The guide part 3029 inside the discharge trough 3032 guides all the waste generated by the impact and falls into the inside of the collecting part 3012 for unified collection to avoid the waste generated by the impact remaining on the surface of the fixed part 3021 and affecting the next punching.

[0044] After the punching and trimming are completed, the upper mold assembly 201 begins to move upward, thereby releasing the extrusion on the fixed ring 3031 and the sliding member 3028. Under the action of the return spring 1 3027, the sliding member 3028 begins to move upward with the fixed ring 3031 and returns to its original position, and the pressing block 3037 also releases the extrusion. Under the contraction of the return spring 2 3036, the pressing block 3037 is squeezed upward by the L-shaped fixing rod 3034 and returns to its original position, thereby releasing the fixation of the brake disc, and then the brake disc is taken out.

[0045] During use, after the L-shaped fixing rod 3034 fixes the brake disc on the outer diameter of the fixing ring 3031, the upper mold assembly 201 continues to squeeze the pressing block 3037, so that the fixing block 3033 squeezes the fixing ring 3031, so that the fixing ring 3031 brings the sliding member 3028 to squeeze the return spring 3027 inside the fixing member 3021, and in the process of the sliding member 3028 being squeezed and moved downward, one end of the linkage rod 3026 begins to rotate inside the sliding member 3028 and moves and adjusts, and rotates and adjusts toward the bottom along with the sliding member 3028, so that the linkage rod 3026 The rotating shaft 3025 at the other end of the rod 3026 also rotates and carries the movable punch 3023 along the movable groove 3022 inside the fixed part 3021. In the process, the movable punch 3023 also starts to punch and trim the outer diameter of the brake disc with the cooperation of the punching part 3024, and all the waste generated by the punching is impacted into the inside of the discharge trough 3032. The guide part 3029 inside the discharge trough 3032 guides all the waste generated by the impact and falls into the inside of the collecting part 3012 for unified collection to avoid the waste generated by the impact remaining on the surface of the fixed part 3021 and affecting the next punching.

[0046] After the punching and trimming is completed, the upper die assembly 201 begins to move upward, thereby releasing the squeeze on the fixed ring 3031 and the sliding member 3028. Under the action of the return spring 1 3027, the sliding member 3028 begins to move upward with the fixed ring 3031 and returns to its original position, and the pressing block 3037 also stops squeezing. Under the contraction of the return spring 2 3036, the pressing block 3037 is squeezed upward by the L-shaped fixing rod 3034 and returns to its original position, thereby releasing the fixation of the brake disc, and then the brake disc is adjusted. After being taken out, the upper die assembly 201 squeezes the fixed assembly 303 and the punching assembly 302 into the interior of the collecting assembly 301, and the movable punch 3023 completes the punching and trimming under the drive of the punching part 3024. The waste generated by the punching is guided by the fixed assembly 303 and falls into the collecting assembly 301, which effectively avoids the accumulation of burrs and damage to the mold, 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 stamping, and improving product quality.

[0047] The remaining structures are the same as those of Example 2.

[0048] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A single punch die for punching and trimming automobile brake discs and brake wheels, characterized by: include: Fixed rod (100); An upper die unit (200) comprises an upper die assembly (201) disposed on the top of the fixed rod (100) for downward punching; An upper die assembly (201) comprises a top plate (2011) arranged on the top of a fixed rod (100), a hydraulic rod (2012) arranged on the top of the top plate (2011), a pressing plate (2014) arranged at the output end of the hydraulic rod (2012), and a stamping part (2015) arranged at the bottom of the pressing plate (2014), wherein the pressing plate (2014) is slidably connected to the fixed rod (100); The lower die unit (300) comprises a collecting assembly (301) arranged at the bottom of the fixing rod (100) for processing waste materials after punching the brake disc, a punching assembly (302) arranged at the top of the collecting assembly (301) for punching and trimming the brake disc, and a fixing assembly (303) arranged at the top of the punching assembly (302) for maintaining the stability of the brake disc in the punching state. The fixing assembly (303) cooperates with the upper die assembly (201) in the working state to achieve positioning of the brake disc before punching, thereby ensuring the stability of the brake disc in the punching and trimming state. The collecting assembly (301) comprises 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 supporting plate (3013) disposed at the bottom of the collecting member (3012); The punching assembly (302) comprises a fixing member (3021) disposed on the top of the bottom plate (3011), a movable groove (3022) disposed inside the fixing member (3021), a movable punch (3023) slidably disposed inside the movable groove (3022), and a punching member (3024) disposed on the movable punch (3023), wherein the punching member (3024) is fixedly connected to the bottom plate (3011); A rotating shaft (3025) is provided on one side of the movable punch (3023), a linkage rod (3026) is provided for rotation inside the rotating shaft (3025), a sliding member (3028) is provided at the other end of the linkage rod (3026) for sliding and rotation, and the sliding member (3028) is slidably connected to the fixing member (3021); A material guide (3029) is provided on the top of the sliding member (3028), and the material guide (3029) cooperates with the movable punch (3023); A fixing assembly (303) includes a fixing ring (3031) disposed on the top of the sliding member (3028), a material discharge chute (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 provided on both sides of the fixing block (3033), a connecting plate (3035) is provided at one end of the L-shaped fixing rod (3034), a second return spring (3036) is provided at the other end of the connecting plate (3035), and the other end of the second return spring (3036) is connected to the connecting plate (3035) on the other side.

2. The single punch die for punching and trimming automobile brake disc and brake wheel according to claim 1, characterized in that: A fixing plate (2013) is provided at the bottom of the top plate (2011), and the fixing plate (2013) and the output end of the hydraulic rod (2012) are penetrated and slidably connected.

3. The single punch die for punching and trimming automobile brake disc and brake wheel according to claim 2, characterized in that: A return spring 1 (3027) is provided inside the bottom plate (3011), and the top of the return spring 1 (3027) is connected to the sliding member (3028).

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