Automobile wheel hub stamping die

Abstract

The application relates to the technical field of automobile hub stamping dies, in particular to an automobile hub stamping die; the die comprises an upper die plate and a lower die plate, the upper die plate is installed above the lower die plate; the die further comprises an auxiliary mechanism, the auxiliary mechanism is fixedly installed on the upper surface of the lower die plate, when the upper die plate is stamping, the auxiliary mechanism drives the rotating disc to rotate a certain angle through the lifting assembly, the rotating block slides within a certain distance under the limitation of the sliding groove block and the straight slot, two working states of opening and closing are formed, wherein the opening state is formed after the punching is completed, the auxiliary mechanism separates the waste through the adsorption block; the closing state is formed before the punching, the auxiliary mechanism clamps the side surface of the workpiece through the arc-shaped block, so that the machining precision is improved; the arc-shaped plate is used for extruding and adhering the workpiece through the adhering surface, so that the concentricity of the workpiece is guaranteed, the precision of the stamping machining is guaranteed, after the punching is completed, the adsorption block generates the adsorption force on the waste in the initial stage, so that the waste and the workpiece are quickly separated.

Description

Technical Field

[0001] This invention relates to the field of automotive wheel hub stamping die technology, and specifically to an automotive wheel hub stamping die. Background Technology

[0002] The manufacturing processes of automobile wheel hubs mainly include stamping, forging, and casting. Among them, stamping can quickly complete the production of a large number of parts in a short time, which is suitable for the needs of large-scale production. Stamping can produce complex part shapes because the design of the mold can be flexibly adjusted to adapt to various shape requirements. The stamping process has a high degree of automation and can produce continuously in a short time, thereby improving production efficiency. Stamping has obvious advantages in high precision, high efficiency, large-scale production, and the manufacturing of complex-shaped parts.

[0003] Automotive wheel stamping dies are metal forming tools used to manufacture automotive wheels. They play a crucial role in the automobile manufacturing process, used to stamp sheet metal into the shape of wheel hubs. Wheel stamping dies are used to stamp and form sheet metal according to a designed shape under high pressure. They ensure the precision, consistency, and quality of the wheel hubs. Wheel stamping dies typically consist of two parts: an upper die and a lower die. The space between the upper and lower dies is the area used to stamp and form the sheet metal.

[0004] Existing automotive wheel stamping dies cannot limit and fix the metal sheet during the upper die pressing process, resulting in low processing accuracy and large errors in size and shape. This is especially true for complex shapes like automotive wheel stampings, where surface quality is difficult to guarantee, requiring subsequent surface treatment and additional processes. After punching, the scrap and blank stick adhere to each other. If the scrap cannot be separated from the blank in time, punching failure may occur, or even the entire blank may be scrapped, leading to decreased work efficiency and economic losses.

[0005] In view of the above, in order to overcome the above technical problems, the present invention designs an automobile wheel hub stamping die, which solves the above technical problems. Summary of the Invention

[0006] The technical problem to be solved by the present invention is that the existing automobile wheel hub stamping die cannot apply external pressure to maintain the positioning and alignment of the blank during the stamping process. During the punching process, the adhesion between the scrap and the blank will cause the punching failure, resulting in a decrease in work efficiency.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] This invention provides a stamping die for an automobile wheel hub, comprising an upper die and a lower die, the upper die being mounted above the lower die; it also includes an auxiliary mechanism, which is fixedly mounted above the lower die. During stamping, the auxiliary mechanism uses a lifting assembly to rotate a rotating disk at a certain angle, causing the rotating block to slide within a certain distance under the constraints of a sliding block and a straight groove, forming two working states: open and closed. The open state occurs after punching. The auxiliary mechanism uses an adsorption block to...

[0009] Waste separation; before punching, the blank is in a closed state, and the auxiliary mechanism uses arc-shaped blocks to clamp the side of the blank, thereby improving the processing accuracy.

[0010] The auxiliary mechanism also includes a fixing ring; the fixing ring is fixedly installed on the upper part of the lower template, the rotating disk is coaxially rotatably installed below the fixing ring, and the lifting component is fixedly installed on one side of the fixing ring. The outer surface of the lifting component and the rotating disk is in transition fit. During the punching process, the upper template is pressed down to the limit position, at which time the outer surface of the lifting component and the rotating disk is in interference fit. In other cases, it is in clearance fit. The clearance fit can ensure that the adsorption flow channel inside the rotating disk can be unobstructed, so as not to affect the movement. The rotating block circumferential array is slidably installed on the upper part of the rotating disk. The rotating blocks of the circumferential array can make the arc blocks combine to form a closed circular surface during the rotation, thereby achieving the clamping effect on the scrap. After the reverse rotation, the opening in the middle of the rotating disk will be exposed, so that the waste is collected by the rotating disk. The auxiliary mechanism can switch between the open and closed states.

[0011] A hexagonal mounting groove is provided above the rotating disk, and a sliding block is fixedly installed on the side of the hexagon. A trapezoidal sliding groove is provided on the top of the sliding block for sliding with the rotating block. The trapezoidal sliding groove, together with the rotating block, ensures that during the rotation of the rotating disk, due to the different lengths of the two bases of the trapezoid, the rotating block will be confined within the trapezoidal sliding groove, that is, the rotating block will not move in the vertical direction, ensuring the parallelism of the movement and thus ensuring the stability during the sliding process. A power gear is fixedly installed below the rotating disk. The lifting assembly drives the power gear to rotate through a worm shaft. A gear is installed at one end of the worm shaft, and the outer surface of the worm shaft meshes with the power gear, so that the auxiliary mechanism rotates at a certain angle during the punching process.

[0012] The length of the sliding block is half the length of the mounting groove. One end of the sliding block is a sealed structure, and the other end is fixedly installed with the rotating disk. The length of the sliding block is set to half the length of the mounting groove, and all the sliding blocks are installed in the same direction. This restricts the sliding direction and distance of the rotating block, so that the rotating block can only slide within half the clockwise distance of the mounting groove, thereby assisting the mechanism to perform a stable unidirectional opening and closing action.

[0013] A limiting ring is fixedly installed inside the fixed ring, and a reinforcing rib is fixedly installed between the fixed ring and the limiting ring. A straight groove is opened on the top of the reinforcing rib, and the rotating block is installed through the straight groove. The straight groove can control the movement range of the rotating block. The reinforcing rib is installed tangentially along the clockwise direction of the limiting ring, so that the connecting rod moves in the straight groove during the rotation of the rotating disk, and the rotating block can realize the opening and closing action around the center of the rotating disk. During the material feeding process, the opening in the middle of the auxiliary mechanism gradually becomes larger.

[0014] The rotating block is an equilateral triangle, and a sealed pattern can be formed by circumferentially arranging the rotating blocks. An installation block is fixedly installed on the base of the equilateral triangle, and an adsorption block is fixedly installed at the corresponding apex. The adsorption block has a double-layer fan-shaped boss structure. The upper layer of the double-layer fan-shaped structure is set as a rubber pad, which plays a buffering role and can also increase the sealing between the adsorption block and the waste, thereby enhancing the adsorption force. The lower layer is a fan-shaped frustum, which separates the rubber pad and the rotating block and plays a buffering transition role. The fan shape is conducive to multiple rotating blocks better adsorbing the waste in the closed state. The adsorption block adsorbs the waste during the punching process, thereby assisting the mechanism to completely demold.

[0015] V-shaped recesses and V-shaped protrusions are respectively opened and fixed on both sides of the rotating block. The V-shaped recesses and V-shaped protrusions on adjacent rotating blocks are engaged. Through the engagement between the V-shaped recesses and V-shaped protrusions, the positional accuracy of adjacent rotating blocks during the sliding process is increased, ensuring that the mechanism still has accuracy after long-term use. The force of friction between adjacent rotating blocks is changed to friction on multiple surfaces, which improves the wear of this part of the rotating block. This allows the rotating block to remain parallel to the rotating disk during the sliding process, thus enabling the mechanism to continue to move parallel even after multiple uses.

[0016] A translation slider is fixedly installed below the mounting block, and the translation slider slides in the sliding groove. A connecting rod is fixedly installed above the mounting block, and the connecting rod slides in the straight groove. An arc-shaped block is fixedly installed above the connecting rod. The inner surface of the arc-shaped block is a contact surface, and the two sides of the arc surface are concentric arcs with different diameters. The curvature of the contact surface is determined according to the size of the blank. During the stamping process, the contact surface will be in close contact with the outer edge of the blank, and the maximum contact area between the contact surface and the outer edge will be reached before the stamping is completed, thereby achieving the clamping and positioning effect of the blank. The contact surface is used to clamp the workpiece during the stamping process and improve the processing accuracy of the auxiliary mechanism.

[0017] The rotating block has an L-shaped adsorption channel inside, with one end of the L-shape at the top. The adsorption block can adsorb the waste material above through the adsorption channel, quickly separating it from the waste material. The rotating disk is equipped with a negative pressure channel that communicates with the adsorption channel. The other end of the negative pressure channel and the adsorption channel are connected. A through hole is opened on the side of the rotating disk near the lifting component, allowing it to communicate with the outside. When the rotating disk is punched, the through hole of the adsorption channel on the rotating disk is precisely press-fitted with the air passage on the lifting component, forming a sealed passage. The negative pressure channel draws gas from the adsorption channel, enabling the auxiliary mechanism to improve the working efficiency of the punching process.

[0018] The lifting assembly includes a sliding sleeve and a pressing rod. The sliding sleeve is fixedly installed on one side of the fixed ring. The sliding sleeve has a sealed structure design, and the air passage is opened on the side of the sliding sleeve near the fixed ring. After punching, the air passage and the through hole of the negative pressure channel on the rotating disk are interference-fitted. At this time, the upper template moves upward, driving the pressing rod upward. Under the action of the pressing rod, the sliding sleeve forms a pressure difference, which causes the adsorption block to generate an instantaneous adsorption force on the waste, thus separating the waste and the pot material. The pressing rod is slidably installed inside the sliding sleeve. The upper end of the pressing rod is fixedly installed below the upper template. Under the downward pressure of the upper template, it slides downward in the sliding sleeve. In the initial stage of rising, the pressing rod creates a pressure difference between the sliding sleeve and the negative pressure channel through the gas channel, thereby assisting the mechanism in separating the waste and the pot material.

[0019] The beneficial effects of this invention are as follows:

[0020] 1. This invention, by setting up an auxiliary mechanism, ensures the concentricity of the blank material by pressing and bonding it with the adhesive surface on the arc plate during the pressing process of the upper template. This ensures the accuracy of the stamping process. After punching, the adsorption block generates an adsorption force on the waste material in the initial stage, so that the waste material and the blank material are quickly separated.

[0021] 2. This invention sets up a rotating disk and a rotating block, so that the rotating block can achieve two working states, open and closed, according to the vertical displacement of the upper and lower templates during the stamping process. In the closed state, the rotating block clamps and positions the blank during stamping, while in the open state, the waste material and blank are separated after the punching is completed.

[0022] 3. This invention, by setting up a lifting component, cooperates with the air passage and the opening of the adsorption channel in the rotating disk to realize the initial stage of the passage after punching. The upper template moves to drive the extrusion rod to realize the air pressure difference between the inside of the sliding sleeve and the adsorption channel, which helps the adsorption block to adsorb waste. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] The above and other aspects of the invention will now be described by way of example only, with reference to the accompanying drawings, in which:

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the auxiliary mechanism of the present invention;

[0027] Figure 3 This is a schematic diagram of the rotating disk of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of the fixing ring of the present invention;

[0029] Figure 5 This is a schematic diagram of the closed state of the auxiliary mechanism of the present invention;

[0030] Figure 6 This is a schematic diagram of the opening state of the present invention;

[0031] Figure 7 This is a schematic diagram of the rotating block of the present invention;

[0032] Figure 8 This is a cross-sectional view of the rotating block of the present invention;

[0033] Figure 9 This is a cross-sectional view of the rotating disk and lifting assembly of the present invention;

[0034] Figure 10 This is a cross-sectional view of the lifting assembly of the present invention;

[0035] Figure 11 This is a schematic cross-sectional view of the cooperation between the rotating block and the sliding block of the present invention;

[0036] Figure 12 This is a schematic cross-sectional view of the rotating block with its V-shaped recess and V-shaped protrusion.

[0037] In the diagram: 1. Upper template; 2. Lower template; 3. Auxiliary mechanism; 31. Rotating disk; 311. Mounting groove; 312. Sliding block; 313. Trapezoidal sliding groove; 314. Power gear; 315. Negative pressure flow channel; 32. Fixing ring; 321. Limiting ring; 322. Reinforcing rib; 323. Straight groove opening; 33. Rotating block; 331. Mounting block; 332. Adsorption block; 333. V-shaped recess; 334. V-shaped protrusion; 335. Translation slider; 336. Connecting rod; 337. Arc-shaped block; 338. Fitting surface; 339. Adsorption flow channel; 34. Lifting assembly; 341. Worm shaft; 342. Sliding sleeve; 343. Extrusion rod; 344. Airflow hole. Detailed Implementation

[0038] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0039] like Figures 1 to 12 As shown, the present invention provides an automotive wheel hub stamping die, including an upper template 1 and a lower template 2, with the upper template 1 installed above the lower template 2; it also includes an auxiliary mechanism 3, which is fixedly installed on the lower template 2. The auxiliary mechanism 3, through the stamping of the upper template 1, causes the lifting assembly 34 to drive the rotating disk 31 to rotate at a certain angle, so that the rotating block 33 slides within a certain distance under the limitation of the sliding block 312 and the straight groove 323, forming two working states: open and closed. In the open state after punching, the auxiliary mechanism 3 separates the waste material through the adsorption block 332; in the closed state before punching, the auxiliary mechanism 3 uses the arc block 337 to clamp the side of the blank, thereby improving the processing accuracy.

[0040] like Figure 2 and Figure 5As shown, the auxiliary mechanism 3 also includes a fixing ring 32; the fixing ring 32 is used to limit the displacement distance of the rotating block 33 and to install the lifting assembly 34. The fixing ring 32 is fixedly installed on the upper part of the lower template 2. The rotating disk 31 is coaxially rotatably installed below the fixing ring 32. The rotating disk 31 is used to rotate under the drive of the lifting assembly 34, so that the rotating block 33 performs opening and closing actions around the center point. The lifting assembly 34 is fixedly installed on one side of the fixing ring 32. The lifting assembly 34 is used to drive the rotating disk 31 to rotate under the downward pressure of the upper template 1. The outer surfaces of the lifting assembly 34 and the rotating disk 31 are in transition fit. During the punching process, the upper template 1 moves downward... When pressed to the limit position, the outer surfaces of the lifting component 34 and the rotating disk 31 are in an interference fit, while in other cases they are in a clearance fit. The clearance fit ensures that the adsorption channel 339 inside the rotating disk can remain open, thus not affecting the movement. The rotating block 33 is slidably mounted on the rotating disk 31 in a circumferential array. During the rotation, the rotating block 33 in the circumferential array can make the arc block 337 combine to form a closed circular surface, thereby achieving the clamping effect on the waste material. After the reverse rotation, the opening in the middle of the rotating disk 31 will be exposed, allowing the waste material to be collected through the rotating disk 31. This allows the auxiliary mechanism 3 to switch between the open and closed states.

[0041] During operation, the upper template 1 is pressed down, which drives the extrusion rod 343 in the lifting assembly 34 to press down. The extrusion rod 343 rotates the worm gear shaft through the gear and rack mechanism. The worm gear shaft drives the lifting assembly 34 to rotate, causing the rotating disk 31 to rotate. Due to the limiting effect of the fixed ring 32, the rotating block 33 slides around the center of the rotating disk 31 on the rotating disk 31, thereby realizing the opening and closing action.

[0042] like Figure 2 , Figure 3 and Figure 11As shown, a hexagonal mounting groove 311 is provided above the rotating disk 31. The mounting groove 311 is used to install the sliding block 312, providing a sliding element for the rotating block 33. The sliding block 312 is fixedly installed on the side of the hexagon, and the sliding block 312 is used to limit the sliding distance of the rotating block 33. A trapezoidal sliding groove 313 is provided on the top of the sliding block 312 for sliding with the rotating block 33. The trapezoidal sliding groove 313 is used to cooperate with the translation slider 335. The trapezoidal sliding groove 313 and the rotating block 33 can ensure that the rotating disk 31 rotates during the rotation process. Due to the different lengths of the two bases of the trapezoid, the rotating block 33 is confined within the trapezoidal groove 313, meaning that the rotating block 33 will not move in the vertical direction, ensuring parallelism of movement and thus stability during the sliding process. A power gear 314 is fixedly installed below the rotating disk 31. The lifting assembly 34 drives the power gear 314 to rotate through the worm shaft 341. A gear is installed at one end of the worm shaft 341, and the outer surface of the worm shaft 341 meshes with the power gear 314, causing the auxiliary mechanism 3 to rotate at a certain angle during the punching process.

[0043] like Figure 3 , Figure 5 and Figure 6 As shown, the length of the sliding block 312 is half the length of the mounting groove 311. One end of the sliding block 312 is a sealed structure, and the other end is fixedly installed with the rotating disk 31. The length of the sliding block 312 is set to half the length of the mounting groove 311, and all the sliding blocks 312 are installed in the same direction. This restricts the sliding direction and distance of the rotating block 33, so that the rotating block 33 can only slide on half the clockwise distance of the mounting groove 311, thereby assisting the mechanism 3 to perform a stable unidirectional opening and closing action.

[0044] like Figure 4 , Figure 5 and Figure 6 As shown, a limiting ring 321 is fixedly installed inside the fixed ring 32, and a reinforcing rib 322 is fixedly installed between the fixed ring 32 and the limiting ring 321. The reinforcing rib 322 is used to stabilize the structural strength of the fixed ring 32, and at the same time, it restricts the rotation of the rotating block 33 by setting a straight groove 323. A straight groove 323 is opened on the top of the reinforcing rib 322, and the rotating block 33 is installed through the straight groove 323. The straight groove 323 can control the movement range of the rotating block 33. The reinforcing rib 322 is installed tangentially along the clockwise direction of the limiting ring 321, so that during the rotation of the rotating disk 31, the connecting rod 336 moves in the straight groove 323, and the rotating block 33 can realize the opening and closing action around the center of the rotating disk 31. During the material feeding process of the rotating disk 31, the opening in the middle of the auxiliary mechanism 3 gradually becomes larger.

[0045] like Figure 5 , Figure 7 and Figure 8 As shown, the rotating block 33 is an equilateral triangle. By setting up a circular array of 6 rotating blocks 33, a sealed pattern can be formed. An installation block 331 is fixedly installed on the base of the equilateral triangle. The installation block 331 is used to install other components in the rotating block 33. An adsorption block 332 is fixedly installed at the apex corresponding to the base. The adsorption block 332 works with the internal adsorption channel 339 to adsorb waste. The adsorption block 332 has a double-layer fan-shaped boss structure. The upper layer of the double-layer fan-shaped structure is set as a rubber pad, which plays a buffering role and can also increase the sealing between the adsorption block 332 and the waste, thereby enhancing the adsorption force. The lower layer is a fan-shaped frustum, which separates the rubber pad and the rotating block 33 and plays a buffering transition role. The fan shape is conducive to the multiple rotating blocks 33 adsorbing the waste better in the closed state. The adsorption block 332 adsorbs the waste during the punching process, thereby assisting the mechanism 3 to completely demold.

[0046] During operation, as the upper template 1 is pressed down, the rotating block 33 slides towards the center. The two adjacent rotating blocks 33 are engaged by the V-shaped protrusion 334 and the V-shaped recess 333 to increase stability. When pressed down to the limit position, there is no gap between the multiple rotating blocks 33. The inner contact surface 338 of the arc block 337 on the rotating plate is fully in contact with the outer edge of the blank to ensure the accuracy of the stamping process.

[0047] like Figure 7 , Figure 8 and Figure 12 As shown, V-shaped recesses 333 and V-shaped protrusions 334 are respectively opened and fixedly installed on both sides of the rotating block 33. The V-shaped recesses 333 and V-shaped protrusions 334 on adjacent rotating blocks 33 are engaged. Through the engagement between the V-shaped recesses 333 and V-shaped protrusions 334, the positional accuracy of adjacent rotating blocks 33 during the sliding process is increased, ensuring that the mechanism still has accuracy after long-term use. The force of friction between adjacent rotating blocks 33 is changed to friction on multiple surfaces, improving the wear of this part of the rotating block 33. This allows the rotating block 33 to remain parallel to the rotating disk 31 during the sliding process, thus enabling the auxiliary mechanism 3 to continue to move parallel even after multiple uses.

[0048] like Figure 7 , Figure 8 and Figure 11As shown, a translation slider 335 is fixedly installed below the mounting block 331. The translation slider 335 is used to slide in the sliding groove under the drive of the rotating disk 31. A connecting rod 336 is fixedly installed above the mounting block 331. The connecting rod 336 is used to slide in the straight groove 323. An arc-shaped block 337 is fixedly installed above the connecting rod 336. The arc-shaped block 337 is used to clamp and lock the blank before stamping. The inner side of the arc-shaped block 337 is a contact surface 338. The two sides of the arc surface are concentric arcs with different diameters. The curvature of the contact surface 338 is determined according to the size of the blank. During the stamping process, the contact surface 338 will be close to the outer edge of the blank, and the maximum contact area between the contact surface 338 and the outer edge will be reached before the stamping is completed, thereby achieving the clamping and positioning effect of the blank. The contact surface 338 is used to clamp the workpiece during the stamping process, improving the processing accuracy of the auxiliary mechanism 3.

[0049] like Figure 8 and Figure 9 As shown, the rotating block 33 has an L-shaped adsorption channel 339 inside, with one end of the L-shape on top of the adsorption block 332. The adsorption block 332 can adsorb the waste material above through the adsorption channel 339, allowing it to be quickly separated from the waste material. The rotating disk 31 is provided with a negative pressure channel 315 that communicates with the adsorption channel 339. The other end of the negative pressure channel 315 is connected to the adsorption channel 339. A through hole is provided on the side of the rotating disk 31 near the lifting assembly 34, allowing it to communicate with the outside. When the rotating disk 31 is punched, the through hole of the adsorption channel 339 on the rotating disk 31 is precisely press-fitted with the air passage 344 on the lifting assembly 34, forming a sealed passage. The negative pressure channel 315 draws gas from the adsorption channel 339, thereby improving the working efficiency of the auxiliary mechanism 3 in the punching process.

[0050] like Figure 2 , Figure 9 and Figure 10As shown, the lifting assembly 34 includes a sliding sleeve 342 and a pressing rod 343. The sliding sleeve 342 is fixedly installed on one side of the fixed ring 32. The sliding sleeve 342 is designed with a sealed structure, and an air passage 344 is opened on the side of the sliding sleeve 342 near the fixed ring 32. After punching is completed, the air passage 344 and the through hole of the negative pressure flow channel 315 on the rotating disk 31 are interference-fitted. At this time, the upper template 1 moves upward, driving the pressing rod 343 upward. The sliding sleeve 342 is driven by the pressing rod 343. A pressure difference is formed, causing the adsorption block 332 to generate an instantaneous adsorption force on the waste, thus separating the waste and the pot material. The extrusion rod 343 is slidably installed inside the sliding sleeve 342. The upper end of the extrusion rod 343 is fixedly installed below the upper template 1. Under the downward pressure of the upper template 1, it slides downward in the sliding sleeve 342. In the initial stage of rising, the extrusion rod 343 creates a pressure difference between the sliding sleeve 342 and the negative pressure channel 315 through the gas flow channel, thereby enabling the auxiliary mechanism 3 to separate the waste and the pot material.

[0051] During operation, the upper template 1 rises, causing the extrusion block to move upward. A pressure difference is formed through the air passage 344 and the negative pressure channel 315, the adsorption channel 339 and the sliding sleeve 342, causing the adsorption block 332 to generate an adsorption force. This causes the waste and scrap above the adsorption block 332 to separate quickly. Since the adsorption force is small, it cannot stop the movement of the upper template 1, so the upper template 1 continues to move. The extrusion block drives the lifting component 34, causing the rotating disk 31 to rotate under the drive of the power gear 314. The rotating disk 31 and the sliding sleeve 342 become a clearance fit, and the passage no longer exists. The adsorption channel 339 and the negative pressure channel 315 are the same as the outside air, and all movements proceed normally.

[0052] During operation, the upper template 1 rises, causing the extrusion block to shift upwards. A pressure difference is created through the air passage 344, negative pressure channel 315, adsorption channel 339, and sliding sleeve 342, causing the adsorption block 332 to generate adsorption force. This causes the waste and scrap material above the adsorption block 332 to separate rapidly. Since the adsorption force is relatively small, it cannot stop the movement of the upper template 1, so the upper template 1 continues to move. The extrusion block drives the lifting assembly 34, causing the rotating disk 31 to rotate under the drive of the power gear 314. The rotating disk 31 and sliding sleeve 342 become in a clearance fit, the passageway disappears, and the adsorption channel 339 and negative pressure channel 315 are exposed to the outside air, allowing all movements to proceed normally. During the downward pressing process of the upper template 1… The rotating block 33 slides towards the center, and the stability of two adjacent rotating blocks 33 is increased by the interlocking of the V-shaped protrusion 334 and the V-shaped recess 333. When pressed down to the limit position, there is no gap between the multiple rotating blocks 33. The inner side contact surface 338 of the arc block 337 on the rotating plate and the outer edge of the blank are fully in contact to ensure the accuracy of the stamping process. The upper template 1 presses down to drive the extrusion rod 343 in the lifting assembly 34 to press down. The extrusion rod 343 realizes the rotation of the worm gear shaft through the gear and rack cooperation. The worm gear shaft drives the lifting assembly 34 to rotate, causing the rotating disk 31 to rotate. Due to the limiting effect of the fixed ring 32, the rotating block 33 slides around the center of the rotating disk 31 on the rotating disk 31, thereby realizing the opening and closing action.

[0053] The description herein is provided to enable those skilled in the art to implement or use the present disclosure. Various modifications to the present disclosure will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other variations without departing from the scope of the present disclosure.

Claims

1. A stamping die for automobile wheel hubs, comprising an upper die (1) and a lower die (2), wherein the upper die (1) is mounted above the lower die (2); characterized in that, It also includes an auxiliary mechanism (3), which is fixedly installed on the upper part of the lower template (2). The auxiliary mechanism (3) drives the rotating disk (31) to rotate at a certain angle through the lifting component (34) when the upper template (1) is punched, so that the rotating block (33) slides within a certain distance under the limit of the sliding block (312) and the straight groove (323), forming two working states: open and closed. After punching, it is in the open state, and the auxiliary mechanism (3) separates the waste material through the adsorption block (332); before punching, it is in the closed state, and the auxiliary mechanism (3) uses the arc block (337) to clamp the side of the waste material. The auxiliary mechanism (3) also includes a fixing ring (32); the fixing ring (32) is fixedly installed on the upper part of the lower template (2), the rotating disk (31) is coaxially rotatably installed below the fixing ring (32), the lifting assembly (34) is fixedly installed on one side of the fixing ring (32), the outer surfaces of the lifting assembly (34) and the rotating disk (31) are in transition fit, and the rotating block (33) is circumferentially arrayed and slidably installed on the upper part of the rotating disk (31), so that the auxiliary mechanism (3) can switch between open and closed states; A hexagonal mounting groove (311) is provided above the rotating disk (31), and a sliding block (312) is fixedly installed on the side of the hexagon. A trapezoidal sliding groove (313) for sliding with the rotating block (33) is provided on the top of the sliding block (312). A power gear (314) is fixedly installed below the rotating disk (31). The lifting assembly (34) drives the power gear (314) to rotate through the worm gear (341), so that the auxiliary mechanism (3) rotates a certain angle during the punching process. The fixed ring (32) is fixedly installed inside the fixed ring (32) and the reinforcing rib (322) is fixedly installed between the fixed ring (32) and the limiting ring (321). A straight groove (323) is opened on the top of the reinforcing rib (322). The reinforcing rib (322) is installed tangentially in the clockwise direction along the limiting ring (321). During the material feeding process, the rotating disk (31) causes the opening in the middle of the auxiliary mechanism (3) to gradually become larger. The front part of the rotating block (33) is an equilateral triangle. An installation block (331) is fixedly installed on the base of the equilateral triangle, and an adsorption block (332) is fixedly installed at the apex corresponding to the base. The adsorption block (332) is a double-layer fan-shaped boss structure. The double-layer fan-shaped boss structure adsorbs and removes waste material during the punching process, thereby assisting the mechanism (3) to completely demold. A translation slider (335) is fixedly installed below the mounting block (331), a connecting rod (336) is fixedly installed above the mounting block (331), and an arc block (337) is fixedly installed above the connecting rod (336). The arc block (337) has concentric arc surfaces with different diameters on both sides, and the inner side is the contact surface (338). During rotation, the arc block (337) only contacts and clamps the workpiece in the closed state, thereby improving the processing accuracy of the auxiliary mechanism (3).

2. The automobile wheel hub stamping die according to claim 1, characterized in that: The length of the sliding block (312) is half the length of the mounting groove (311), so that the rotating block (33) can only slide on half the clockwise distance of the mounting groove (311), thereby assisting the mechanism (3) to perform a stable one-way opening and closing action.

3. The automobile wheel hub stamping die according to claim 1, characterized in that: V-shaped recesses (333) and V-shaped protrusions (334) are respectively opened and fixed on both sides of the rotating block (33). The V-shaped recesses (333) and V-shaped protrusions (334) on adjacent rotating blocks (33) are engaged, so that the rotating block (33) remains parallel to the rotating disk (31) during the sliding process, and the auxiliary mechanism (3) continues to move in parallel after multiple uses.

4. The automobile wheel hub stamping die according to claim 1, characterized in that: The rotating block (33) has an L-shaped adsorption channel (339) inside, with one end of the L-shape on top of the adsorption block (332). The rotating disk (31) is provided with a negative pressure channel (315) that communicates with the adsorption channel (339). The negative pressure channel (315) draws gas from the adsorption channel (339), enabling the adsorption channel to quickly separate waste materials, thereby assisting the mechanism (3) in improving the working efficiency of the punching process.

5. The automobile wheel hub stamping die according to claim 4, characterized in that: The lifting assembly (34) includes a sliding sleeve (342) and a pressing rod (343). The sliding sleeve (342) is fixedly installed on one side of the fixed ring (32). An air passage (344) is opened on the side of the sliding sleeve (342) near the fixed ring (32). The pressing rod (343) is slidably installed inside the sliding sleeve (342). In the initial stage of the rise, the pressing rod (343) creates a pressure difference between the sliding sleeve (342) and the negative pressure passage (315) through the gas passage, thereby assisting the mechanism (3) in separating waste and slag.

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