A general stamping die suitable for multiple models of brake pad back plates

Abstract

The present application belongs to the technical field of stamping die, and relates to a universal stamping die suitable for brake pad back plates of multiple models. The die contains upper and lower die plates and guide pillars. The upper die plate can slide along the guide pillars, and the bottom surface of the upper die plate is provided with an upper die assembly. The top surface of the lower die plate is provided with a lower die assembly matched with the upper die assembly. The upper cylinder die of the upper die assembly is a special-shaped cylinder structure, and the side surface is provided with a side punching window. The lower die assembly includes a lower die frame, a lower core die and two lower side dies separately arranged on the two sides of the lower core die and capable of ascending and descending. When reset, the lower side dies are flush with the top surface of the lower core die. The lower side dies are provided with a support structure linked with the upper die plate, and the support structure is disabled when the upper die plate is lowered to a specific position. There is also a side punching assembly linked with the upper die plate, and the side punching block can punch the side surface of the lower core die. Each assembly is modularly installed and can be detached and replaced. The die can realize three processes of blanking, flanging and bending in one stamping stroke, reduces production links, improves efficiency, shortens the cycle, and improves machining precision and quality stability.

Description

TECHNICAL FIELD

[0001] The present application relates to a universal stamping die suitable for multiple models of brake pad back plates, belonging to the technical field of stamping dies. BACKGROUND

[0002] Brake pad back plates include two main types of flat plate type and flanged type. The flat plate type brake pad back plate can be continuously stamped and blanked in steps, and after blanking, it is basically in the finished product state, having the advantage of relatively simple processing flow. However, its structural strength is low, and in order to meet the use requirements, a relatively thick plate material needs to be used, which not only increases the material cost, but also makes it difficult to fix the brake pad on the back plate, affecting the overall performance and stability of the brake system.

[0003] The flanged type brake pad back plate (as shown in Figure 21 ), due to the existence of the flange structure, significantly improves its structural strength, so that a relatively thin plate material can be used, which helps to reduce cost and weight. However, the flanged type brake pad back plate is difficult to process, and the current common processing methods mainly include two types.

[0004] One is a flow line type processing, which is generally completed by cooperating multiple mechanical hands and multiple stamping machines. In this processing method, the mechanical hand needs to constantly take and place materials between multiple stamping machines to complete the stamping blanking, flanging, bending and other processes in multiple steps. Although this processing method can realize automatic production, the equipment cost is high, the occupied area is large, and the precision and stability of the mechanical hand are extremely high. Once the mechanical hand fails, the entire production line will be paralyzed, which seriously affects the production efficiency.

[0005] The other is a manual operation method, which is performed by multiple stamping machines in sequence to perform stamping blanking, flanging, bending and other processes. This method is complex to operate, requires workers to have high skill level and rich experience, and has low production efficiency, high labor intensity, and product quality is difficult to guarantee consistency. In addition, multiple stamping machines occupy a large space, which is not conducive to the rational planning and utilization of the production site.

[0006] Most of the stamping dies on the market can only process a single model of brake pad back plate, and lack of universality. When different models of brake pad back plates need to be produced, different dies need to be replaced, which not only increases the procurement cost of the die and the difficulty of inventory management, but also prolongs the production preparation time, reduces the production efficiency, and cannot meet the market demand for multiple varieties and small batch brake pad back plates. SUMMARY

[0007] In view of the above deficiencies in the prior art, the technical problem to be solved by the present application is to provide a universal stamping die suitable for multiple models of brake pad back plates to solve the above problems.

[0008] The universal stamping die suitable for brake pad back plates of multiple models comprises an upper die plate, a lower die plate and multiple guide struts, the guide struts are fixed on the lower die plate, the upper die plate can slide up and down along the guide struts, the bottom surface of the upper die plate is provided with an upper die assembly, the top surface of the lower die plate is provided with a lower die assembly matched with the upper die assembly, the upper die assembly comprises an upper cylinder die, the upper cylinder die is a special-shaped cylinder structure matched with the unfolded shape of the brake pad back plate, the inner diameter of the upper cylinder die is a stepped inner diameter, the inner diameter of the lower end is larger, the inner diameter of the upper end is smaller, a transition inclined surface is arranged between the large inner diameter and the small inner diameter, a through side punching window is formed in the side surface of the upper cylinder die, the lower die assembly comprises a lower die frame, a lower core die and lower side dies, the lower core die and the lower side dies are located in the lower die frame, the lower side dies are provided in two and are arranged on the two sides of the lower core die, the lower die frame and the lower core die are fixed, the lower side dies can be lifted and lowered, in the reset state, the top surface of the lower side dies is flush with the top surface of the lower core die, the lower side dies are provided with a support structure linked with the upper die plate, when the upper die plate descends and the punching port of the lowermost end of the upper cylinder die is lower than the lower core die, the support structure is disabled and the lower side dies descend, the side punching assembly linked with the upper die plate is further included, the side punching assembly comprises a side punching block, the side punching block is located above the lower die frame, when the upper die plate descends and the punching port of the lowermost end of the upper cylinder die is lower than the lower core die, the side punching block punches the side surface of the lower core die downward, the end portion of the side punching block passes through the side punching window and enters the lateral recess of the lower core die, the upper die assembly, the lower die assembly and the side punching assembly are all modularly installed and can be detached and replaced.

[0009] Preferably, the upper cylinder die is internally provided with a pressing block matched with the inner diameter thereof, the pressing block is suspended on the upper die plate through a pressing block guide column, and a compression spring is arranged between the upper die plate and the pressing block. When stamping and blanking, the pressing block can keep the plate stable and prevent the plate from being broken.

[0010] Preferably, in the reset state, the bottom surface of the pressing block is flush with the punching port of the upper cylinder die.

[0011] Preferably, the lower side dies are slidably connected with the lower core die through dovetail groove structures.

[0012] The support structure comprises a support clamping block, the support clamping block can move horizontally, in the reset state, one end of the support clamping block is located below the lower side dies to support the lower side dies, the bottom surface of the upper die plate is fixed with a vertical insertion rod, the lower end portion of the insertion rod is a wedge surface, the other end of the support clamping block is provided with an inclined surface matched with the wedge surface, when the insertion rod descends, the wedge surface of the lower end portion of the insertion rod is in contact with the inclined surface on the support clamping block to make the support clamping block move outward horizontally and release the support on the lower side dies, when the insertion rod rises, the support clamping block gradually moves inward horizontally and resets.

[0013] In the application, the bottom surface of the upper die plate is fixed with a vertical driving inclined plate, the outer end of the side punching block is provided with an inclined groove, when the driving inclined plate descends, the inclined edge of the driving inclined plate is clamped into the inclined groove, the driving inclined plate is in contact with the side punching block to make the side punching block move inward horizontally and insert into the lateral recess of the lower core die, when the driving inclined plate rises, the side punching block gradually moves outward horizontally and resets.

[0014] In addition, the upper die is provided with a punch pin fixed on the bottom surface of the upper die plate, and the punch pin can pass through the pressing block.

[0015] Preferably, in the reset state, the bottom surface of the punch pin is flush with the bottom surface of the pressing block.

[0016] In the present application, a die hole corresponding to the punch pin is formed on the lower die assembly, a blanking hole is formed on the lower die plate, and the blanking hole is concentric with the die hole; a horizontal blanking channel is also formed on the lower die plate, and the blanking channel is located below the blanking hole.

[0017] The present application also includes a vertical unloading column passing through the upper die plate, which is fixed and does not rise and fall with the upper die plate.

[0018] Compared with the prior art, the present application has the following beneficial effects:

[0019] 1. Strong versatility: the upper die assembly, the lower die assembly and the side punching assembly are modularly installed and can be disassembled and replaced. This design enables the mold to adapt to different models of brake pad back plates, eliminating the need for separate design and manufacture of molds for each model of brake pad back plate, greatly reducing the procurement cost and inventory management difficulty of the mold, improving the utilization rate and production flexibility of the mold, and enabling quick response to market demand for multiple varieties and small batches of brake pad back plates.

[0020] 2. Integrated processing procedures: through one stroke of stamping, the blanking, flanging and bending three processes can be realized. Compared with the traditional multi-step processing method, the production links are reduced, the production efficiency is improved, and the production cycle is shortened. At the same time, positioning errors caused by multiple clamping and handling of workpieces are avoided, improving the processing precision and quality stability of the product.

[0021] 3. Simple operation and small space occupation: compared with the flow line processing method, the mold of the present application does not need to be matched with a complex mechanical hand, and the operation is more simple, reducing the requirement for the skill level of the operator. Moreover, the overall structure of the mold is compact, occupying small space, facilitating the rational planning and layout of the production site, and improving the utilization rate of the production site. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is one of the overall structure schematic diagrams of the present application (front view);

[0023] Figure 2 is the second overall structure schematic diagram of the present application;

[0024] Figure 3 is the third overall structure schematic diagram of the present application (back view);

[0025] Figure 4is a structural diagram of the lower die assembly;

[0026] Figure 5 is a structural diagram of the upper die assembly;

[0027] Figure 6 is a structural diagram of the upper draw die;

[0028] Figure 7 is a sectional view of the upper draw die;

[0029] Figure 8 is one of the schematic diagrams of the stamping process;

[0030] Figure 9 is one of the schematic diagrams of the stamping process;

[0031] Figure 10 is one of the schematic diagrams of the stamping process;

[0032] Figure 11 is one of the schematic diagrams of the stamping process;

[0033] Figure 12 is one of the schematic diagrams of the stamping process;

[0034] Figure 13 is one of the schematic diagrams of the material taking process;

[0035] Figure 14 is a structural diagram of the lower core die and lower die frame;

[0036] Figure 15 is a structural diagram of the lower side die;

[0037] Figure 16 is a structural diagram of the support block (left);

[0038] Figure 17 is a structural diagram of the support block (right);

[0039] Figure 18 is a structural diagram of the side punch (left);

[0040] Figure 19 is a structural diagram of the side punch (right);

[0041] Figure 20 is a structural diagram of the brake pad back plate (after the first stamping and blanking);

[0042] Figure 21 is a structural diagram of the finished brake pad back plate (after the second flanging and third bending);

[0043] Figure 22 is a structural diagram of the edge waste material.

[0044] In the diagram: 1. Upper cylindrical mold; 2. Upper template; 3. Unloading column; 4. Side punch window; 5. Drive inclined plate; 6. Lower side mold; 7. Side punch block; 8. Side punch return spring; 9. Guide pillar; 10. Support block; 11. Block return spring; 12. Lower mold frame; 13. Drop channel; 14. Lower template; 15. Spring support; 16. Mold hole; 17. Lower core mold; 18. Insert rod; 19. Drop hole; 20. Pressure block; 21. Punch column; 22. Pressure column; 23. Pedal; 24. Pressure block guide column; 25. Compression spring; 26. Sheet metal; 27. Side mold return spring; 28. Transition inclined surface; 29. ​​Brake pad back plate; 29.1. Vertical flange edge; 29.2. Horizontal flange edge; 30. Edge scrap; 31. Lateral groove; 32. Inclined surface; 33. Inclined groove. Detailed Implementation

[0045] The present invention will be further described below with reference to specific embodiments.

[0046] The description of the present invention is merely a structural or even functional description of the embodiments, and the scope of the present invention is not limited by the embodiments described herein.

[0047] like Figures 1-22 As shown, this embodiment is achieved through the following technical solution: a universal stamping die suitable for multiple models of brake pad backplates, including an upper template 2, a lower template 14 and multiple guide pillars 9. The guide pillars 9 are fixed on the lower template 14. The upper template 2 can slide up and down along the guide pillars 9. The bottom surface of the upper template 2 is provided with an upper die assembly, and the top surface of the lower template 14 is provided with a lower die assembly that cooperates with the upper die assembly.

[0048] The upper mold assembly includes an upper cylindrical mold 1, which is a non-circular cylindrical structure adapted to the unfolded shape of the brake pad backplate 29. The upper cylindrical mold 1 has a stepped inner diameter, with a larger inner diameter at the lower end and a smaller inner diameter at the upper end. A transition slope 28 is provided between the larger and smaller inner diameters. A through side punching window 4 is provided on the side of the upper cylindrical mold 1. A pressure block 20 adapted to its inner diameter is provided inside the upper cylindrical mold 1. The pressure block 20 is suspended on the upper template 2 by a pressure block guide post 24. A compression spring 25 is provided between the upper template 2 and the pressure block 20. In the reset state, the bottom surface of the pressure block 20 is flush with the punching port of the upper cylindrical mold 1. Inside the upper cylindrical mold 1, a punch post 21 is also fixed on the bottom surface of the upper template 2. The punch post 21 can pass through the pressure block 20. In the reset state, the bottom surface of the punch post 21 is flush with the bottom surface of the pressure block 20.

[0049] The lower die assembly comprises a lower die frame 12, a lower core die 17 and lower side dies 6, the lower core die 17 and the lower side dies 6 are located in the lower die frame 12, the lower side dies 6 are provided in two and are arranged on both sides of the lower core die 17; the lower die frame 12 and the lower core die 17 are fixed, the lower side dies 6 are slidably connected with the lower core die 17 through dovetail groove structures, the lower side dies 6 are liftable, in a reset state (reset through lower side die reset springs 27), the top surface of the lower side dies 6 is flush with the top surface of the lower core die 17; the lower side dies 6 are provided with a support structure linked with the upper die plate 2, when the upper die plate 2 is lowered and the punching port at the lowest end of the upper cylinder die 1 is lower than the lower core die 17, the support structure is disabled and the lower side dies 6 are lowered; specifically, the support structure comprises a support clamping block 10, the support clamping block 10 is horizontally movable, in a reset state, one end of the support clamping block 10 is located below the lower side dies 6 and supports the lower side dies 6; the bottom surface of the upper die plate 2 is fixed with a vertical insertion rod 18, the lower end of the insertion rod 18 is a wedge surface, the other end of the support clamping block 10 is provided with a slope 32 matched with the wedge surface, when the insertion rod 18 is lowered, the wedge surface at the lower end of the insertion rod 18 is in contact with the slope 32 on the support clamping block 10, so that the support clamping block 10 is transversely moved outward and the support on the lower side dies 6 is released; when the insertion rod 18 is raised, the support clamping block 10 is gradually transversely moved inward and reset under the action of a clamping block reset spring 11, one end of the clamping block reset spring 11 abuts against a spring support 15.

[0050] The bottom surface of the upper die plate 2 in the embodiment is provided with a vertical pressing column 22, when the upper die plate 2 is lowered, the lower end of the pressing column 22 can act on a pedal 23, the pedal 23 is connected with the lower side dies 6 through a connecting rod, so that the lower side dies 6 can be driven to be lowered.

[0051] On the lower die assembly, a die hole 16 is arranged at a position corresponding to the punching column 21, a blanking hole 19 is arranged on the lower die plate 14, the blanking hole 19 is concentric with the die hole 16; a horizontal blanking channel 13 is further arranged on the lower die plate 14, the blanking channel 13 is located below the blanking hole 19.

[0052] The embodiment further comprises a side punching assembly linked with the upper die plate 2, the side punching assembly comprises a side punching block 7, the side punching block 7 is located above the lower die frame 12, when the upper die plate 2 is lowered and the punching port at the lowest end of the upper cylinder die 1 is lower than the lower core die 17, the side punching block 7 is stamped to the side surface of the lower core die 17, the end of the side punching block 7 penetrates through the side punching window 4 and enters a lateral recess 31 in the lower core die 17; specifically, the bottom surface of the upper die plate 2 is fixed with a vertical driving inclined plate 5, the outer end of the side punching block 7 is provided with an inclined groove 33, when the driving inclined plate 5 is lowered, the inclined edge of the driving inclined plate 5 is clamped into the inclined groove 33, the driving inclined plate 5 is in contact with the side punching block 7, so that the side punching block 7 is transversely moved inward and inserted into the lateral recess 31 in the lower core die 17; when the driving inclined plate 5 is raised, the side punching block 7 is gradually transversely moved outward and reset.

[0053] The embodiment further comprises a vertical unloading column 3 penetrating through the upper die plate 2, the unloading column 3 is fixed and does not rise and fall with the upper die plate 2.

[0054] The upper mold assembly, lower mold assembly, and side punch assembly of the present invention are all modularly installed and can be disassembled and replaced to adapt to different models of brake pad backplates.

[0055] The working principle or process of this invention:

[0056] The sheet material 26 is placed on the lower mold assembly. The upper mold plate 2 slowly descends under the action of the press, causing the upper mold assembly to descend synchronously. The pressure block 20 presses onto the sheet material 26 under the action of the pressure spring 25. Figure 8 As shown, the pressure block 20 stops descending, and the compression spring 25 gradually compresses. At this time, the upper cylinder mold 1 and the punch 21 continue to descend. The upper cylinder mold 1 forms a shear force with the lower core mold 17 and the lower side mold 6, and the material is stamped out, completing the forming of the outline of the brake pad back plate 29 and its circular hole, as shown. Figure 20 As shown. With the continued descent of template 2, as... Figure 9 , 10 As shown, the insert rod 18 contacts and engages with the support block 10, causing the support block 10 to move laterally outward, releasing the support for the lower mold 6. At this time, the upper mold plate 2 continues to descend, and the lower end of the pressure column 22 acts on the pedal 23. The pedal 23 is connected to the lower mold 6 through a connecting rod, thereby driving the lower mold 6 to descend and preventing the lower mold 6 from interfering with subsequent steps. At the same time, the stepped inner diameter of the upper cylindrical mold 1 bends the edge of the brake pad back plate 29, achieving the flanging of the vertical flange edge 29.1, as shown. Figure 10 As shown. The upper template 2 continues to descend. At this time, the side punch window 4 of the upper cylindrical mold 1 reaches a position where it does not interfere with the side punch block 7, and the driving inclined plate 5 contacts and engages with the side punch block 7, causing the side punch block 7 to move inward laterally and insert into the lateral groove 31 of the lower core mold 17, completing the bending of the transverse flange edge 29.2, as shown. Figure 11 As shown (the bent portion is not shown in this cross-section), the finished product is as follows: Figure 21 As shown. After all processes are completed, the upper template 2 moves upward and resets, all modules reset, the brake pad backplate 29 is formed on the lower core mold 17, and the edge waste 30 is lifted by the upper cylindrical mold 1 and pushed down from the upper cylindrical mold 1 by the fixed unloading column 3 (the unloading column 3 does not rise or fall with the upper template 2), as shown. Figure 12 As shown, it can be slid out from one side, as... Figure 13 As shown, this invention can achieve the three processes of blanking, flanging, and bending through a single stamping stroke.

[0057] Of course, the above description is only a preferred embodiment of the present invention and should not be considered as limiting the scope of the embodiments of the present invention. The present invention is also not limited to the above examples, and all equivalent changes and improvements made by those skilled in the art within the scope of the present invention should fall within the patent coverage of the present invention.

Claims

1. A universal stamping die suitable for multiple models of brake pad back plate, comprising an upper die plate (2), a lower die plate (14) and a plurality of guide pillars (9), the guide pillars (9) being fixed on the lower die plate (14), the upper die plate (2) being slidable up and down along the guide pillars (9), the bottom surface of the upper die plate (2) being provided with an upper die assembly, and the top surface of the lower die plate (14) being provided with a lower die assembly matched with the upper die assembly, characterized in that the upper die assembly comprises an upper cylinder die (1) having a special-shaped cylinder structure matched with the unfolded shape of the brake pad back plate (29), the inner diameter of the upper cylinder die (1) being a stepped inner diameter, the lower end inner diameter being larger, and the upper end inner diameter being smaller, a transition inclined surface (28) being arranged between the large inner diameter and the small inner diameter, and a through side punching window (4) being formed in the side surface of the upper cylinder die (1). The lower die assembly comprises a lower die frame (12), a lower core die (17) and a lower side die (6), the lower core die (17) and the lower side die (6) being located in the lower die frame (12), the lower side die (6) being provided with two parts arranged on the two sides of the lower core die (17), the lower die frame (12) and the lower core die (17) being fixed, and the lower side die (6) being liftable, the top surface of the lower side die (6) being flush with the top surface of the lower core die (17) in the reset state. The lower side die (6) is provided with a support structure linked with the upper die plate (2), when the upper die plate (2) is lowered and the punching port at the lowest end of the upper cylinder die (1) is lower than the lower core die (17), the support structure is disabled, and the lower side die (6) is lowered. The side punching assembly linked with the upper die plate (2) is further included, the side punching assembly comprising a side punching block (7) located above the lower die frame (12), when the upper die plate (2) is lowered and the punching port at the lowest end of the upper cylinder die (1) is lower than the lower core die (17), the side punching block (7) is pressed towards the side surface of the lower core die (17), and the end portion of the side punching block (7) penetrates through the side punching window (4) and enters the lateral recess (31) of the lower core die (17). The upper die assembly, the lower die assembly and the side punching assembly are all modularly installed and detachably replaced. The upper cylinder die (1) is internally provided with a pressing block (20) matched with the inner diameter thereof, the pressing block (20) being suspended on the upper die plate (2) through a pressing block guide column (24), and a compression spring (25) being arranged between the upper die plate (2) and the pressing block (20).

2. The universal stamping die suitable for multi-model brake pad back plates according to claim 1, characterized in that, In the reset state, the bottom surface of the pressing block (20) is flush with the punching port of the upper cylinder die (1).

3. The universal stamping die suitable for use with multiple brake pad backplates of claim 2, wherein, The lower side die (6) is slidably connected with the lower core die (17) through a dovetail groove structure.

4. The universal stamping die suitable for use with multiple brake pad back plates of claim 1, wherein, ​ 5. The universal stamping die suitable for use with multiple brake pad back plates of claim 1, wherein, The support structure comprises a support block (10), the support block (10) is horizontally movable, and in a reset state, one end of the support block (10) is located below a lower die (6) to support the lower die (6); a vertical insertion rod (18) is fixed to the bottom surface of an upper die plate (2), the lower end of the insertion rod (18) is a wedge surface, the other end of the support block (10) is provided with a slope (32) matched with the wedge surface, when the insertion rod (18) descends, the wedge surface of the lower end of the insertion rod (18) is in contact with the slope (32) on the support block (10), so that the support block (10) moves outward horizontally to release the support on the lower die (6); when the insertion rod (18) rises, the support block (10) gradually moves inward horizontally to reset.

6. The universal stamping die suitable for use with multiple brake pad back plates of claim 1, wherein, A vertical driving slope (5) is fixed to the bottom surface of the upper die plate (2), and the outer end of the side punch (7) is provided with a slope groove (33), when the driving slope (5) descends, the slope edge of the driving slope (5) is clamped into the slope groove (33), the driving slope (5) is in contact with the side punch (7), so that the side punch (7) moves inward horizontally and is inserted into the lateral groove (31) of the lower core die (17); when the driving slope (5) rises, the side punch (7) gradually moves outward horizontally to reset.

7. The universal stamping die suitable for use with multiple brake pad back plates of claim 2, wherein, In the upper cylinder die (1), the bottom surface of the upper die plate (2) is further provided with a punch column (21), and the punch column (21) can pass through the pressing block (20).

8. The universal stamping die suitable for use with multiple brake pad backplates of claim 7, wherein, In the reset state, the bottom surface of the punch column (21) is flush with the bottom surface of the pressing block (20).

9. The universal stamping die suitable for use with multiple brake pad backplates of claim 7, wherein, On the lower die assembly, a die hole (16) is arranged at a position corresponding to the punch column (21), a blanking hole (19) is arranged on the lower die plate (14), and the blanking hole (19) is concentric with the die hole (16); a horizontal blanking channel (13) is further arranged on the lower die plate (14), and the blanking channel (13) is located below the blanking hole (19).

10. The universal stamping die suitable for use with multiple brake pad back plates of claim 1, wherein, Further comprising a vertical unloading column (3) passing through the upper die plate (2), the unloading column (3) is fixed and does not rise and fall with the upper die plate (2).

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