A pre-column sealing plate cold stamping forming die

Abstract

The utility model relates to a cold punch forming die of column front sealing plate before, including upper die seat, lower die seat, set up on the male die assembly of upper die seat and set up on the female die assembly of lower die seat, male die assembly and female die assembly are set up to the alignment of each other, male die assembly includes the bending male die and the upper die oblique sliding block of sliding connection upper die seat, sets up the punch on the upper die oblique sliding block, female die assembly includes the bending cavity and lower die oblique guide block, the bending male die extends into the bending cavity, when the die is closed, along the sliding direction of upper die oblique sliding block, lower die oblique guide block sliding contact lower die oblique guide block far from the side of punch and promote lower die oblique guide block, and the punch slides along the normal of lateral hole on the product.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts stamping equipment technology, and in particular to a cold stamping forming die for a pillar front end plate. Background Technology

[0002] The front pillar cover of a car covers the A-pillar area and is used to strengthen the body structure and ensure the sealing performance of the body.

[0003] The front end cap features a bent structure and side holes. The bent structure gives the front end cap an arc / angular cross-section to fit the A-pillar; the side holes are used to connect brackets and hinges. These side holes are located on the inclined surface of the front end cap and cannot be achieved using conventional vertical punching. In actual manufacturing, a separate side hole forming process is required. This multi-process forming adds mold-changing steps, leading to accumulated positioning errors and affecting the dimensional accuracy of the finished workpiece. Furthermore, the multi-process forming requires repeated positioning adjustments and turnover, reducing production efficiency.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a cold stamping mold for column front end plates, so as to form column front end plates in one cold stamping process.

[0006] The technical solution of this utility model is as follows: The cold stamping die for the front end plate includes an upper die base, a lower die base, a punch assembly mounted on the upper die base, and a die assembly mounted on the lower die base. The punch assembly and the die assembly are aligned and facing each other. The punch assembly includes a bending punch and an upper die inclined sliding block slidably connected to the upper die base. A punch is mounted on the upper die inclined sliding block. The die assembly includes a bending cavity and a lower die inclined guide block. The bending punch extends into the bending cavity. During die closing, along the sliding direction of the upper die inclined sliding block, the lower die inclined guide block slides into contact with the side of the lower die inclined guide block away from the punch and pushes the lower die inclined guide block, while the punch slides along the normal direction of the side hole on the product.

[0007] A further technical solution is that the upper mold base is configured as a split upper mold top seat and an upper mold bottom plate. The upper mold bottom plate is embedded in the upper mold top seat. A first adjusting shim is provided between the upper mold top seat and the upper mold bottom plate. The punch assemblies are distributed on the upper mold top seat and the upper mold bottom plate.

[0008] A further technical solution is that the punch assembly also includes a forming punch and a blanking punch. A forming die and a blanking die are aligned and arranged on the die assembly. The forming punch and forming die, as well as the blanking punch and blanking die, form cavities corresponding to the product's shape. Cutting edges are also aligned and arranged on the blanking punch and blanking die, and the cutting edges are aligned with the product's contour.

[0009] A further technical solution involves creating a blanking hole on the lower die holder. The blanking hole is aligned with the cutting edge.

[0010] A further technical solution involves the die assembly further comprising a bottom support block, a vertical support block disposed on the bottom support block, and an inclined support block. The bottom support block, the vertical support block, and the inclined support block surround and form a bending cavity. The vertical support block connects the bottom support block and the forming die. The vertical support block is disposed on the side of the bottom support block away from the inclined support block.

[0011] A further technical solution is to provide a second adjusting shim between the bottom support block, the vertical support block, and the inclined support block.

[0012] A further technical solution is that countersunk holes are respectively opened on the first adjusting shim and the second adjusting shim, and bolts are installed in the countersunk holes.

[0013] A further technical solution is that the punch assembly also includes an upper die inclined sliding seat. An inclined groove is formed on the upper die inclined sliding seat. A sliding extension is provided on the upper die inclined sliding block, extending into the inclined groove.

[0014] A further technical solution involves installing a spring between the inclined slide groove and the sliding extension, with the spring positioned on the side of the sliding extension away from the inclined guide block of the lower mold. During mold closing, the spring is in a compressed state.

[0015] A further technical solution involves providing a slide rail on the inclined sliding block of the upper mold, and providing a sliding protrusion on the inclined guide block of the lower mold to connect with the slide rail.

[0016] The beneficial technical effects of this utility model are as follows: (1) The cold stamping forming mold for the front end plate of this utility model has a bending cavity and a bending punch that cooperate to bend the workpiece. It is also provided with an upper die inclined sliding block and a lower die inclined guide block, wherein the upper die inclined sliding block is slidably connected to the upper die base and the lower die inclined guide block. When the mold is closed, the upper die inclined sliding block contacts and is pushed by the lower die inclined guide block. The upper die inclined sliding block slides relative to the upper die base. With the action of the upper die base driving the upper die inclined sliding block to move downward, the punch on the upper die inclined sliding block slides along the normal direction of the side hole on the product. So that while the main body of the product is formed by mold closing, the side hole on the product is processed by the punch, and the product is formed in one step. The product is cold stamped in one step, without the need for multiple clamping and positioning, which greatly improves the product production efficiency, eliminates the accumulation of errors, and improves the product forming accuracy.

[0017] (2) Furthermore, the upper mold base is configured as a split upper mold top plate and an upper mold bottom plate, and the punch components can be distributed on the upper mold top plate and the upper mold bottom plate. When forming the workpiece, the deformation and springback of different parts during the product forming process can be optimized to improve the forming quality of the product.

[0018] (3) Furthermore, the bending cavity is formed by the bottom support block, the vertical support block and the inclined support block, which avoids direct squeezing and friction of the lower mold base during product forming and extends the service life of the lower mold base. In addition, the bottom support block, the vertical support block and the inclined support block are respectively provided with second adjustment shims, which can easily fine adjust their relative positions, offset assembly errors and wear, and ensure the processing accuracy of the product. Attached Figure Description

[0019] Figure 1 A three-dimensional structural schematic diagram of a cold stamping die for a column front end plate according to an embodiment of the present disclosure is shown in the parting state.

[0020] Figure 2 An exploded view of the upper mold in a cold stamping die for a column front end plate according to an embodiment of the present disclosure is shown.

[0021] Figure 3 The diagram shows an assembly structure of a bottom support block, a vertical support block, and an inclined support block in a cold stamping die for a column front sealing plate according to an embodiment of the present disclosure.

[0022] Figure 4 An exploded view of the connection portion of the upper die inclined sliding block, the upper die inclined sliding seat, and the lower die inclined guide block in a cold stamping forming die for a column front sealing plate according to an embodiment of the present disclosure is shown.

[0023] Marked in the attached diagram: 1. Upper die base; 11. Upper die top seat; 12. First adjusting shim; 121. Countersunk hole; 13. Upper die base plate; 2. Punch assembly; 21. Forming punch; 22. Bending punch; 23. Blanking punch; 231. Cutting edge; 24. Upper die inclined sliding block; 241. Sliding extension; 242. Punch; 243. Slide rail; 244. Upper die inclined sliding seat; 245. Inclined slide groove; 3. Lower die base; 31. Blanking hole; 4. Die assembly; 41. Forming die; 42. Blanking die; 43. Bending cavity; 44. Bottom support block; 45. Vertical support block; 46. Inclined support block; 47. Second adjusting shim; 48. Lower die inclined guide block; 481. Sliding protrusion.

[0024] Figure 1 A three-dimensional structural schematic diagram of a cold stamping die for a column front end plate according to an embodiment of the present disclosure is shown in the parting state. Figure 2 An exploded view of the upper die in a cold stamping forming die for a column front end plate according to an embodiment of this disclosure is shown. Please refer to... Figure 1 and Figure 2 The cold stamping die for the front end plate includes an upper die base 1, a lower die base 3, a punch assembly 2 mounted on the upper die base 1, and a die assembly 4 mounted on the lower die base 3. The punch assembly 2 and the die assembly 4 are aligned and facing each other. The punch assembly 2 includes a bending punch 22 and an upper die inclined sliding block 24 slidably connected to the upper die base 1. A punch 242 is mounted on the upper die inclined sliding block 24. The die assembly 4 includes a bending cavity 43 and a lower die inclined guide block 48. The bending punch 22 extends into the bending cavity 43 to bend the workpiece. When the die is closed, along the sliding direction of the upper die inclined sliding block 24, the lower die inclined guide block 48 slides into contact with the side of the lower die inclined guide block 48 away from the punch 242 and pushes the lower die inclined guide block 48. The punch 242 slides along the normal direction of the side hole on the product. Specifically, the upper die inclined sliding block 24 slides relative to the upper die base 1. In conjunction with the upper die base 1 driving the upper die inclined sliding block 24 downwards, this drives the punch 242 on the upper die inclined sliding block 24 to slide along the normal direction of the side holes on the product. This allows the side holes on the product to be machined simultaneously with the mold closing and forming the main body of the product, thus forming the product in one step. This single-step cold stamping process eliminates the need for multiple clamping and positioning operations, significantly improving production efficiency while eliminating error accumulation and enhancing product forming accuracy.

[0025] In some embodiments, two sets of punch assemblies 2 can be provided on the upper die base 1, and correspondingly, two sets of die assemblies 4 can be provided on the lower die base 3. Among the two sets of punch assemblies 2 and die assemblies 4, the sliding directions of the upper die inclined sliding block 24 can be arranged opposite to each other, so that the stress perpendicular to the mold closing direction generated by the upper die inclined sliding block 24 can be mutually offset during mold closing, significantly improving the efficiency of cold stamping while extending the service life of the cold stamping die along the front sealing plate of the long column. When there are two or more side holes on the product, the upper die inclined sliding block 24, the upper die inclined sliding seat 244, and the lower die inclined guide block 48 can be provided in corresponding quantities. Holes can be formed on the forming punch 21 and the blanking punch 23 for the punch 242 to pass through, so that the upper die inclined sliding block 24 and the upper die inclined sliding seat 244 are concealed inside the upper die base 1.

[0026] Please refer to Figure 1 and Figure 2 The punch assembly 2 also includes a forming punch 21 and a blanking punch 23. The die assembly 4 has a forming die 41 and a blanking die 42 aligned on it. The forming punch 21 and the forming die 41, as well as the blanking punch 23 and the blanking die 42, form cavities corresponding to the product's shape, facilitating the stamping and forming of the product's main body. The blanking punch 23 and the blanking die 42 also have aligned cutting edges 231, which are aligned with the product's contour to punch away excess parts from the blank, forming a complete product without any excess.

[0027] Preferably, a blanking hole 31 is provided on the lower die base 3. The blanking hole 31 is aligned with the cutting edge 231. After the die is closed and the blank is punched, the cut-off waste material can directly enter the blanking hole 31, avoiding the accumulation of waste material on the lower die and affecting the subsequent cold stamping forming process, thus improving the efficiency of cold stamping forming.

[0028] More preferably, the upper mold base 1 is configured as a split upper mold top seat 11 and an upper mold bottom plate 13. The upper mold bottom plate 13 is embedded in the upper mold top seat 11. The punch assembly 2 can be distributed on the upper mold top seat 11 and the upper mold bottom plate 13. When forming a workpiece, the deformation and springback of different parts during the product forming process can be optimized to improve the forming quality of the product. In addition, a first adjusting shim 12 can be provided between the upper mold top seat 11 and the upper mold bottom plate 13. Adjusting the thickness of the first adjusting shim 12 can adjust the gap between the upper mold top seat 11 and the upper mold bottom plate 13, compensate for machining errors and wear, and align the punch assembly 2 and the die assembly 4 to ensure the forming quality of the product. Figure 3 This diagram illustrates the assembly structure of the bottom support block, vertical support block, and inclined support block in a cold stamping die for a column front end plate according to an embodiment of this disclosure. Please refer to... Figure 1 , Figure 2 and Figure 3The die assembly 4 also includes a bottom support block 44, a vertical support block 45 disposed on the bottom support block 44, and an inclined support block 46. The bottom support block 44, the vertical support block 45, and the inclined support block 46 surround to form a bending cavity 43. The bending cavity 43 is formed by the bottom support block 44, the vertical support block 45, and the inclined support block 46 surrounding it, avoiding direct pressure and friction on the lower die holder 3 during product molding, thus extending the service life of the lower die holder 3. The vertical support block 45 connects the bottom support block 44 and the forming die 41. The vertical support block 45 is disposed on the side of the bottom support block 44 away from the inclined support block 46. The vertical support block 45 is disposed along the mold closing direction. The length direction of the inclined support block 46 forms an acute angle with the mold closing direction; adjusting the angle of inclination of the inclined support block 46 can adjust the bending angle of the corresponding structure of the product. A groove (not shown in the figure) can be formed on the lower mold base 3, and a limiting block (not shown in the figure) is set at the opening of the groove. The bottom support block 44, the vertical support block 45 and the inclined support block 46 are set in the groove, and the limiting block restricts each component inside the groove. The limiting block and the lower mold base 3 can be connected by bolts.

[0029] Preferably, a second adjusting shim 47 is provided between the bottom support block 44, the vertical support block 45, and the inclined support block 46. The second adjusting shims 47 can easily fine-tune their relative positions, offset assembly errors and wear, and ensure the processing accuracy of the product.

[0030] More preferably, the first adjusting shim 12 and the second adjusting shim 47 are respectively provided with countersunk holes 121, and bolts (not shown in the drawings) are provided in the countersunk holes 121 to fix the positions of the first adjusting shim 12 and the second adjusting shim 47.

[0031] Figure 4 An exploded view of the connection portion between the upper die inclined sliding block, the upper die inclined sliding seat, and the lower die inclined guide block in a cold stamping die for a column front end plate according to an embodiment of this disclosure is shown. Please refer to... Figure 1 , Figure 2 and Figure 4 The punch assembly 2 also includes an upper die inclined sliding seat 244. An inclined groove 245 is formed on the upper die inclined sliding seat 244. A sliding extension 241 is provided on the upper die inclined sliding block 24, extending into the inclined groove 245 to slidably connect the upper die inclined sliding seat 244 and the upper die inclined sliding block 24. The opening of the inclined groove 245 can be narrowed to provide an extension (not shown in the figure). Correspondingly, a limiting groove (not shown in the figure) can be formed on the sliding extension 241 for the extension to engage, thereby restricting the sliding extension 241 from sliding within the inclined groove 245.

[0032] Preferably, a spring (not shown in the figure) is provided between the inclined slide groove 245 and the sliding extension 241. The spring is located on the side of the sliding extension 241 away from the inclined guide block 48 of the lower mold. When the mold is closed, the spring is in a compressed state to store energy. When the mold is opened, the spring pushes the sliding extension 241 to slide along the incline, and the punch 242 moves laterally to be pulled out from the side hole. At the same time, the inclined sliding block 244 of the upper mold and the punch 242 are reset, reducing manual operation.

[0033] More preferably, a slide rail 243 is provided on the upper die inclined sliding block 24. A sliding protrusion 481 is provided on the lower die inclined guide block 48 to slidably connect to the slide rail 243, thereby slidably connecting the upper die inclined sliding block 24 and the lower die inclined guide block 48. In some embodiments, the opening of the slide rail 243 can be provided with an extension (not shown in the figure), and correspondingly, the sliding protrusion 481 can be provided with a limiting groove (not shown in the figure) for the extension to be inserted, thereby restricting the sliding protrusion 481 from sliding within the slide rail 243.

[0034] In some implementations, the upper die inclined sliding seat 244 and the lower die inclined guide block 48 can be made of CR12MoV, and the upper die inclined sliding block 24 can be made of quenched T10A, which is wear-resistant and reduces friction during sliding. Lubricating oil can be provided in the slide rail 243 and the inclined slide groove 245.

[0035] The specific workflow of this utility model is as follows: The operator places the blank in the preset forming position on the die assembly 4. Then, the lifting device (not shown in the figure) is activated to drive the upper die downwards for mold closing. During the downward movement of the upper die, the upper die inclined sliding block 24 first contacts the lower die inclined guide block 48. The lower die inclined guide block 48 pushes the upper die inclined sliding block 24 to slide along the inclined slide groove 245, giving the punch 242 a speed perpendicular to the mold closing direction. In conjunction with the downward movement of the upper die, the punch 242 is driven to slide along the normal direction of the side hole. The upper and lower molds are closed. At this time, the forming punch 21 and forming die 41 form the main body of the product, the bending punch 22 and bending groove bend the bent part of the product, the blanking punch 23 and blanking die 42 work together to punch away the excess blank, the punch 242 slides along the normal of the side hole to punch out the side hole, and then the lifting device drives the upper mold to move upward to perform mold separation. During the mold separation process, the spring pushes the upper mold inclined sliding block 24 to slide in the opposite direction along the inclined slide groove 245 until it is reset. After the upper mold is reset, the cold stamping forming of the product is completed.

[0036] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0037] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims. Detailed Implementation

[0038] To make the objectives, features, and advantages of this utility model more apparent and understandable, please refer to the accompanying drawings. It should be noted that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the content disclosed herein. They are not intended to limit the implementation conditions of this utility model and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by this utility model, should still fall within the scope of the technical content disclosed in this utility model.

[0039] In the description of this utility model, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

Claims

1. A cold stamping die for a column front sealing plate, characterized in that, The cold stamping die for the front end plate includes an upper die base, a lower die base, a punch assembly disposed on the upper die base, and a die assembly disposed on the lower die base; the punch assembly and the die assembly are aligned facing each other; the punch assembly includes a bending punch and an upper die inclined sliding block slidably connected to the upper die base; a punch is disposed on the upper die inclined sliding block; the die assembly includes a bending cavity and a lower die inclined guide block; the bending punch extends into the bending cavity; when the die is closed, along the sliding direction of the upper die inclined sliding block, the lower die inclined guide block slides to contact the side of the lower die inclined guide block away from the punch and pushes the lower die inclined guide block, and the punch slides along the normal direction of the side hole on the product.

2. The cold stamping forming die for the column front sealing plate as described in claim 1, characterized in that: The upper mold base is configured as a split upper mold top seat and an upper mold bottom plate; the upper mold bottom plate is embedded in the upper mold top seat; a first adjusting shim is provided between the upper mold top seat and the upper mold bottom plate; the punch assembly is distributed on the upper mold top seat and the upper mold bottom plate.

3. The cold stamping forming die for the column front sealing plate as described in claim 2, characterized in that: The punch assembly further includes a forming punch and a blanking punch; the die assembly has a forming die and a blanking die aligned on it; the forming punch and the forming die, as well as the blanking punch and the blanking die, form cavities corresponding to the product shape; the blanking punch and the blanking die also have cutting edges aligned on them, and the cutting edges are aligned with the contour of the product.

4. The cold stamping forming die for the column front sealing plate as described in claim 3, characterized in that: The lower die base has a blanking hole; the blanking hole is aligned with the cutting edge.

5. The cold stamping forming die for the column front sealing plate as described in claim 3, characterized in that: The die assembly further includes a bottom support block, a vertical support block and an inclined support block disposed on the bottom support block; the bottom support block, the vertical support block and the inclined support block surround to form a bending cavity; the vertical support block connects the bottom support block and the forming die; the vertical support block is disposed on the side of the bottom support block away from the inclined support block.

6. The cold stamping forming die for the column front sealing plate as described in claim 5, characterized in that: A second adjusting shim is provided between the bottom support block, the vertical support block, and the inclined support block, respectively.

7. The cold stamping forming die for the column front sealing plate as described in claim 5, characterized in that: The first adjusting shim and the second adjusting shim are respectively provided with countersunk holes, and bolts are installed in the countersunk holes.

8. The cold stamping forming die for the column front sealing plate as described in claim 1, characterized in that: The punch assembly further includes an upper die inclined sliding seat; the upper die inclined sliding seat has an inclined sliding groove; the upper die inclined sliding block has a sliding extension that extends into the inclined sliding groove.

9. The cold stamping forming die for the column front sealing plate as described in claim 8, characterized in that: A spring is provided between the inclined groove and the sliding extension, and the spring is located on the side of the sliding extension away from the inclined guide block of the lower mold; when the mold is closed, the spring is in a compressed state.

10. The cold stamping forming die for the column front sealing plate as described in claim 1, characterized in that: The upper die inclined sliding block is provided with a slide rail; the lower die inclined guide block is provided with a sliding protrusion that is slidably connected to the slide rail.

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