Back lining plate punch forming die

Abstract

The utility model provides a backing plate punch forming die, which relates to the field of backing plate punch dies and comprises an upper die plate, a punch fixing plate, an upper die, a vertical edge punch, a central punch, a first buffer stripping component, a first inner guide column, a lower die plate, a lower cushion block, a lower die, a lower stripping plate, a second buffer stripping component, a second inner guide column and a guide component. The stamping die is manufactured by upgrading the die technology and adopting a local material thinning mode, so that the backing plate cannot incline in the edge bending machining process, the product material is subjected to plastic deformation, the perpendicularity and planeness of the edge bending position of the backing plate cannot be out of tolerance, the requirement of mass production can be met, and the production efficiency is improved. The attaching area of the back lining plate and the guide block is improved by more than 90%, and shaking abnormity before and during starting of the whole vehicle is eliminated.

Description

Technical Field

[0001] The utility model relates to the field of backing plate stamping dies, in particular to a backing plate stamping forming die. Background Art

[0002] The backing plate is an important component of the clutch assembly (its shape is as shown in the attached manual). Figure 4 As shown in the figure, the verticality and flatness of the backing plate's curved edge are key workpiece dimensions. These critical dimensions directly impact the smooth operation of the backing plate and guide block assembly, which in turn directly affects the comfort and stability of the vehicle's performance.

[0003] At present, the backing plate is extruded by a stamping die. When designing the existing stamping die, the gap at the backing plate bending edge is determined by the actual thickness of the material (the thickness of the backing plate is 3MM). This has a design defect: when the backing plate is bent, the gap between the die and the bending processing part is large (also 3MM), and the backing plate is prone to tilting during bending, which leads to local deformation of this part. As a result, the flatness and verticality of the backing plate bending edge will be out of tolerance and fail to meet the drawing requirements. Therefore, additional costs such as manual grinding will be incurred later, and the backing plate cannot be put into use due to substandard quality. Utility Model Content

[0004] The purpose of the present invention is to solve the problems raised in the above background technology, and then proposes a backing plate stamping die.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A backing plate stamping die comprises an upper template, a punch fixing plate, an upper die, a vertical edge punch, a center punch, a first buffer stripping assembly, a first inner guide post, a lower template, a lower pad, a lower die, a lower stripping plate, a second buffer stripping assembly, a second inner guide post and a guide assembly.

[0007] The punch fixing plate is connected to the upper template and the upper template is connected to the punching equipment;

[0008] The upper die and the punch fixing plate are slidably matched through a first inner guide pin, and the first inner guide pin is arranged in the punch fixing plate. The upper die includes an upper die core, and the upper die core is provided with a first central punch hole and a plurality of first crimped edge holes distributed around the circumference of the first central punch hole.

[0009] A plurality of vertical edge punches and a center punch are all arranged on the punch fixing plate and can pass through the upper die, the center punch is directly opposite to the first center punch hole and is slidably engaged therewith, and the vertical edge punches are one-to-one corresponding to the first crimping holes and are slidably engaged therewith;

[0010] A plurality of first buffer stripping assemblies are slidably matched with the upper die plate and connected to the upper die through the punch fixing plate;

[0011] The first inner guide pin is disposed in the punch fixing plate and is in sliding engagement with the upper plate;

[0012] The lower pad is arranged on the lower template and the lower template is arranged on the processing table;

[0013] The lower die is arranged on the lower pad and includes a lower die core, the lower die core is provided with a second central punch hole facing the first central punch hole and a plurality of second crimping holes corresponding to the first crimping holes one by one, the second central punch hole is slidably engaged with the central punch, and the second crimping holes are slidably engaged with the vertical edge punch;

[0014] The second center punching hole sequentially passes through the lower die core, the lower die, the lower pad and the lower template;

[0015] The lower stripper plate is slidably arranged on the lower die and is connected to a plurality of groups of second buffer stripper assemblies. The second buffer stripper assemblies are connected to the lower stripper plate through the lower pad and are slidably matched with the lower die plate.

[0016] The second inner guide post is arranged in the lower pad and is in sliding cooperation with the lower stripper plate;

[0017] The guide assembly is arranged between the upper template and the lower template.

[0018] Furthermore, the first buffer stripping assembly includes a first contour screw and a first spring. A first through hole is provided on the upper template for slidingly cooperating with the first contour screw. The first contour screw passes through the punch fixing plate and is connected to the upper mold. The first spring is sleeved on the outside of the first contour screw and one end of the first spring is connected to the upper mold, and the other end of the first spring is connected to the mounting hole provided in the punch fixing plate.

[0019] Furthermore, the second buffer stripping assembly includes a second contour screw and a second spring. A second through hole that slides with the second contour screw is opened on the lower template. The second contour screw passes through the lower pad and is connected to the lower stripping plate. The second spring is sleeved on the outside of the second contour screw and one end of the second spring is connected to the lower stripping plate, and the other end of the second spring is connected to the fixing hole opened in the lower pad.

[0020] The above solution can effectively buffer the mold during mold closing through multiple sets of first buffer stripping components and multiple sets of second buffer stripping components to avoid hard contact between the upper and lower molds, and can quickly separate the backing plate from the mold when the mold is opened after stamping.

[0021] Furthermore, the guide assembly includes a guide column pad and a guide column group. The guide column pad is provided on the lower template, and the guide column group is provided on the guide column pad. The guide column group is slidably matched with the upper template.

[0022] The above solution uses a guide assembly to guide the motion trajectory of the upper and lower mold cores, wherein the guide post pad can shorten the height of the guide post group, thereby ensuring the stability of the guide assembly.

[0023] Furthermore, the guide column pad is provided with a travel stop block, and the travel stop block is provided with a safety stop block that matches with it.

[0024] The above solution can use the travel stop block and the safety stop block to keep the spring inside the mold in a free state when the mold is not in use, thereby avoiding the spring from being squeezed and stressed and causing fatigue. When the mold needs to be used, the two can be unlocked.

[0025] Furthermore, a plurality of mold pads are provided on the bottom surface of the lower mold plate.

[0026] The above solution can create a gap between the processing table and the lower template by arranging the die pad, thereby allowing the punching debris from the center hole of the backing plate to flow out smoothly.

[0027] Furthermore, a punch back plate is provided between the upper template and the punch fixing plate, and the first contour screw passes through the punch back plate and the punch fixing plate in sequence to be connected to the upper template.

[0028] The above solution uses a punch back plate with higher hardness to avoid the punch acting in reverse on the upper template during the mold closing process to cause it to dent, thereby protecting the upper template and extending the service life of the mold.

[0029] Furthermore, the upper die, lower die, vertical edge punch and center punch are all made of SKD11 steel.

[0030] Furthermore, the surface of the vertical edge punch is subjected to a carbide coating treatment using a thermal diffusion method.

[0031] Compared with the prior art, the beneficial effects of the present invention are:

[0032] Compared with the existing technology, this application upgrades the mold technology and adopts the local material thinning method to produce the stamping mold, so that the backing plate will not tilt during the bending process, and the product material undergoes plastic deformation, so the verticality and flatness of the backing plate at the bending edge will not exceed the tolerance, which can meet the needs of large-scale mass production. The improved fitting area between the rear backing plate and the guide block reaches more than 90%, and the abnormal shaking of the vehicle before and during starting is eliminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0034] Figure 2 Schematic diagram of the upper mold core;

[0035] Figure 3Schematic diagram of the lower mold core;

[0036] Figure 4 Schematic diagram of the cooperation between the vertical edge punch and the backing plate;

[0037] Reference numerals:

[0038] 1. Upper template; 2. Punch fixing plate; 3. Upper die; 31. Upper die core; 32. First through hole; 4. Vertical edge punch; 5. Center punch; 6. First through hole; 7. First contour screw; 8. First spring; 9. First inner guide column; 10. Lower template; 11. Lower pad; 12. Lower die; 121. Lower die core; 122. Second through hole; 13. Lower stripper plate; 14. Punch; 15. Second through hole; 16. Second contour screw; 17. Second spring; 18. Guide column pad; 19. Guide column assembly; 20. Travel stop; 21. Safety stop; 22. Die pad; 23. Punch back plate. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. The present invention is further described in conjunction with the drawings and embodiments:

[0040] like Figures 1 to 4 As shown, a backing plate stamping die includes an upper template 1, a punch fixing plate 2, an upper die 3, a vertical edge punch 4, a center punch 5, a first buffer stripping assembly, a first inner guide post, a lower template 10, a lower pad 11, a lower die 12, a lower stripping plate 13, a second buffer stripping assembly, a second inner guide post and a guide assembly.

[0041] The punch fixing plate 2 is connected to the upper template 1 and the upper template 1 is connected to the stamping equipment (the stamping equipment belongs to the existing technology and is not shown in the figure without improvement);

[0042] The upper die 3 and the punch fixing plate 2 are slidably fitted together via a first inner guide post 9, and the first inner guide post 9 is disposed within the punch fixing plate 2. The upper die 3 includes an upper die core 31, which is provided with a first central punch hole 33 and a plurality of first crimping holes 32 distributed circumferentially around the first central punch hole 33.

[0043] Multiple vertical edge punches 4 and a center punch 5 are all arranged on the punch fixing plate 2 and can pass through the upper die 3. The center punch 5 is opposite to the first center punch hole 33 and slides with it. The vertical edge punches 4 correspond to the first crimping holes 32 one by one and slide with them.

[0044] Several groups of first buffer stripping components are slidably matched with the upper die plate 1 and connected to the upper die 3 through the punch fixing plate 2;

[0045] The first inner guide pin is arranged in the punch fixing plate 2 and is in sliding engagement with the upper plate;

[0046] The lower pad 11 is arranged on the lower template 10 and the lower template 10 is arranged on a processing table (the processing table is not shown in the figure);

[0047] The lower die 12 is disposed on the lower pad 11 and includes a lower die core 121. The lower die core 121 is provided with a second central punch 14 directly opposite to the first central punch 33 and a plurality of second crimping holes 122 corresponding one-to-one to the first crimping holes 32. The second central punch 14 is in sliding engagement with the central punch 5, and the second crimping holes 122 are in sliding engagement with the vertical edge punch 4.

[0048] The second center punch hole 14 sequentially passes through the lower die core 121, the lower die 12, the lower pad 11 and the lower template 10;

[0049] The lower stripper plate 13 is slidably arranged on the lower die 12 and is connected to a plurality of second buffer stripper assemblies. The second buffer stripper assemblies pass through the lower pad 11 and are connected to the lower stripper plate 13 and are slidably matched with the lower die plate 10.

[0050] The second inner guide post is disposed in the lower pad 11 and is in sliding engagement with the lower stripper plate 13 (the second inner guide post is not shown in the figure);

[0051] The guide assembly is arranged between the upper template 1 and the lower template 10 .

[0052] Further refinement of the embodiment of the present invention is as follows: Figure 1 As shown, the first buffer stripping component includes a first contour screw 7 and a first spring 8. A first through hole 6 that slides with the first contour screw 7 is opened on the upper template 1. The first contour screw 7 passes through the punch fixing plate 2 and is connected to the upper mold 3. The first spring 8 is mounted on the outside of the first contour screw 7 and one end of the first spring 8 is connected to the upper mold 3. The other end of the first spring 8 is connected to the mounting hole opened in the punch fixing plate 2. The mounting hole is not shown in the figure.

[0053] Further refinement of the embodiment of the present invention is as follows: Figure 1 As shown, the second buffer stripping assembly includes a second contour screw 16 and a second spring 17. A second through hole 15 is provided on the lower template 10, which slides with the second contour screw 16. The second contour screw 16 passes through the lower pad 11 and is connected to the lower stripping plate 13. The second spring 17 is sleeved on the outside of the second contour screw 16 and one end of the second spring 17 is connected to the lower stripping plate 13. The other end of the second spring 17 is connected to the fixing hole provided in the lower pad 11.

[0054] Further refinement of the embodiment of the present invention is as follows: Figure 1 As shown, the guide assembly includes a guide post pad 18 and a guide post group 19. The guide post pad 18 is provided on the lower template 10, and the guide post group 19 is provided on the guide post pad 18. The guide post group 19 is slidably matched with the upper template 1;

[0055] Further optimization of the above embodiment scheme, such as Figure 1 As shown, the guide column pad 18 is further provided with a travel stop block 20 , and the travel stop block 20 is provided with a safety stop block 21 matched therewith.

[0056] Further refinement of the embodiment of the present invention is as follows: Figure 1 As shown, a plurality of mold pads 22 are provided on the bottom surface of the lower mold plate 10 .

[0057] Further refinement of the embodiment of the present invention is as follows: Figure 1 As shown, a punch back plate 23 is provided between the upper template 1 and the punch fixing plate 2, and the first equal height screw 7 passes through the punch back plate 23 and the punch fixing plate 2 in sequence to connect with the upper mold 3. The punch back plate 23 with higher hardness can avoid the punch from acting in reverse on the upper template 1 during the mold closing process to cause it to be concave, thereby protecting the upper template 1 and extending the service life of the mold.

[0058] In a further refinement of the embodiment of the present invention, the upper die 3, the lower die 12, the vertical edge punch 4 and the center punch 5 are all made of SKD11 steel and the surface of the vertical edge punch 4 is subjected to a carbide coating treatment using a thermal diffusion method.

[0059] The workflow of this utility model:

[0060] When the mold is initially designed, the upper mold core 31 and the lower mold core 121 are adapted to and fit with the upper and lower surface shapes of the backing plate respectively. When the backing plate needs to be bent and the center hole is processed, it is first placed on the lower mold core 121 and the lower mold core 121 is aligned and fit with the surface of the backing plate. Then the stamping equipment is controlled to work and drive the upper mold 3 close to the lower mold 12. When the upper mold 3 and the lower mold 12 are closed, the first spring 8 and the second spring 17 are compressed at the same time to perform mold closing buffering. At the same time, the guide assembly is used to guide the movement trajectory of the upper and lower mold cores. The guide column pad 18 can shorten the height of the guide column group 19 to ensure the stability of the guide assembly. In addition, the travel stop block 20 and the safety stop block 21 can keep the internal spring in a free state when the mold is not in use, thereby avoiding the spring being squeezed and stressed and fatigued. When the mold needs to be used, the two can be unlocked.

[0061] When the first spring 8 is compressed, the punch fixing plate 2 and the upper die 3 can be tightly fitted together (there is a gap between them initially) due to the action of the first inner guide column 9 and the first through hole 6. Then the center punch 5 will pass through the first center punch hole 33 and the second center punch hole 14 in sequence to complete the punching of the center hole of the backing plate. Then the punched chips will fall vertically along the second center punch hole 14. By providing the die pad 22, a gap can be created between the processing table and the lower die plate 10, thereby allowing the punching chips to flow out smoothly.

[0062] At the same time, when the second spring 17 is compressed, the second inner guide column and the second through hole 15 can make the lower pad 11 and the lower stripper plate 13 fit tightly together (similarly, there is a gap between the two initially). At this time, a number of circumferentially distributed vertical edge punches 4 can squeeze the multiple bent edges of the backing plate and then thin the thickness after bending to 2.5MM. At this time, the processing of a backing plate can be completed, and then the stamping equipment drives the upper die 3 away from the lower die 12. During this process, the first spring 8 and the second spring 17 will gradually restore their deformation and drive the lower stripper plate 13 to move upward, and the upper die 3 to move downward, and then the backing plate demoulding process can be quickly realized. After that, the backing plate is transferred and replaced with a new one to start a new round of processing.

[0063] Compared with the existing technology, this application upgrades the mold technology and adopts the local material thinning method to make the stamping mold, so that the backing plate will not tilt during the bending process, and the product material will undergo plastic deformation, so that the verticality and flatness of the backing plate at the bending edge will not exceed the tolerance, which can meet the needs of large-scale mass production, and the improved backing plate and guide block fitting area reaches more than 90%, and the abnormal shaking of the whole vehicle before and when starting is eliminated; specifically, when the lower mold 12 and the vertical edge punch 4 are actuated, the middle is the local bending edge of the backing plate. Taking the backing plate thickness of 3.0MM as an example, at this time, the gap between the lower mold 12 and the vertical edge punch 4 is 2.5MM, and the single-side thinning is 0.5MM, which can significantly improve the verticality and flatness tolerance phenomenon at the bending edge, and improve the verticality and flatness of the backing plate to meet the design requirements of the drawing.

[0064] In addition, when the original mold was designed, the upper mold 3, the lower mold 12, the vertical edge punch 4 and the center punch 5 were made of ordinary Cr12 mold steel. The defect was that the hardness after heat treatment was low at HRC48-52, and the wear resistance was poor. After the application was replaced with high-quality carbon steel SKD11, the hardness after heat treatment reached HRC58-60, and the wear resistance was greatly improved. The vertical edge punch 4 was surface coated (thermal diffusion carbide coating treatment), and the surface hardness of the coating can reach about HV3200. The hardness is increased and the surface roughness is optimized, thereby improving the phenomenon of strain at the bending edge.

[0065] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A backing plate stamping die, characterized in that: The invention comprises an upper template (1), a punch fixing plate (2), an upper die (3), a vertical edge punch (4), a center punch (5), a first buffer stripping assembly, a first inner guide column (9), a lower template (10), a lower pad (11), a lower die (12), a lower stripping plate (13), a second buffer stripping assembly, a second inner guide column and a guide assembly. The punch fixing plate (2) is connected to the upper template (1), and the upper template (1) is connected to the punching equipment; The upper die (3) and the punch fixing plate (2) are slidably matched via a first inner guide column (9), and the first inner guide column (9) is arranged in the punch fixing plate (2). The upper die (3) comprises an upper die core (31), and the upper die core (31) is provided with a first central punching hole (33) and a plurality of first curved edge holes (32) distributed around the circumference of the first central punching hole (33). A plurality of vertical edge punches (4) and a center punch (5) are all arranged on the punch fixing plate (2) and can pass through the upper die (3); the center punch (5) faces the first center punch hole (33) and is slidably engaged therewith; the vertical edge punches (4) correspond one-to-one to the first curved edge holes (32) and are slidably engaged therewith; A plurality of first buffer stripping assemblies are slidably matched with the upper die plate (1) and are connected to the upper die (3) through the punch fixing plate (2); The lower pad (11) is arranged on the lower template (10) and the lower template (10) is arranged on the processing table; The lower die (12) is arranged on the lower pad (11) and includes a lower die core (121). The lower die core (121) is provided with a second central punching hole (14) directly opposite to the first central punching hole (33) and a plurality of second bending holes (122) corresponding one-to-one to the first bending holes (32). The second central punching hole (14) is in sliding engagement with the central punch (5), and the second bending holes (122) are in sliding engagement with the vertical edge punch (4). The second center punch hole (14) sequentially passes through the lower die core (121), the lower die (12), the lower pad (11) and the lower template (10); The lower stripping plate (13) is slidably arranged on the lower mold (12) and is connected to a plurality of groups of second buffer stripping assemblies. The second buffer stripping assemblies pass through the lower pad (11) and are connected to the lower stripping plate (13) and are slidably matched with the lower mold plate (10); The second inner guide column is arranged in the lower pad (11) and is slidably matched with the lower stripper plate (13); The guide assembly is arranged between the upper template (1) and the lower template (10).

2. A backing plate stamping die according to claim 1, characterized in that: The first buffer stripping component includes a first contour screw (7) and a first spring (8); a first through hole (6) is provided on the upper template (1) for slidingly engaging with the first contour screw (7); the first contour screw (7) passes through the punch fixing plate (2) and is connected to the upper die (3); the first spring (8) is sleeved on the outside of the first contour screw (7) and one end of the first spring (8) is connected to the upper die (3); the other end of the first spring (8) is connected to the mounting hole provided in the punch fixing plate (2).

3. A backing plate stamping die according to claim 1, characterized in that: The second buffer stripping assembly includes a second contour screw (16) and a second spring (17). A second through hole (15) is provided on the lower template (10) for sliding engagement with the second contour screw (16). The second contour screw (16) passes through the lower pad (11) and is connected to the lower stripping plate (13). The second spring (17) is sleeved on the outside of the second contour screw (16) and one end of the second spring (17) is connected to the lower stripping plate (13). The other end of the second spring (17) is connected to a fixing hole provided in the lower pad (11).

4. The backing plate stamping die according to claim 1, characterized in that: The guide assembly comprises a guide column pad (18) and a guide column group (19); the guide column pad (18) is provided on the lower template (10); the guide column group (19) is provided on the guide column pad (18); and the guide column group (19) is slidably matched with the upper template (1).

5. The backing plate stamping die according to claim 4, characterized in that: The guide column pad (18) is also provided with a travel stop block (20), and the travel stop block (20) is provided with a safety stop block (21) matched therewith.

6. The backing plate stamping die according to claim 1, characterized in that: The bottom surface of the lower template (10) is provided with a plurality of mold pads (22).

7. The backing plate stamping die according to claim 2, characterized in that: A punch back plate (23) is provided between the upper die plate (1) and the punch fixing plate (2), and a first height screw (7) passes through the punch back plate (23) and the punch fixing plate (2) in sequence to be connected to the upper die (3).

8. The backing plate stamping die according to claim 1, characterized in that: The upper die (3), lower die (12), vertical edge punch (4) and center punch (5) are all made of SKD11 steel.

9. The backing plate stamping die according to claim 1, characterized in that: The surface of the vertical edge punch (4) is subjected to a carbide coating treatment using a thermal diffusion method.

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