Precise stamping structure for cold heading back pressure profile tolerance
Through the precision stamping structure of cold heading back pressure profile, the design of upper deplate inserts and lower mold inserts is solved, and the high cost and low efficiency problems caused by the multi-mold process is achieved, high precision and stability of the bending edge end surface of the part is improved, and production efficiency is improved.
Patent Information
- Application Number
- CN202421743986.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-07-22
AI Technical Summary
In the prior art, cold heading profile products require multiple mold processes, resulting in high production costs, low efficiency and inability to ensure the stability of parts quality.
The cold heading back pressure profile is adopted. Through the design of the upper deplate insert and the lower mold insert, the cold heading back pressure on the bending edge of the part after the punching is completed, reducing the process and ensuring the surface profile of the bending edge end face.
It reduces the number of parts stamping processes, reduces mold costs, improves production efficiency, and ensures the quality stability of parts.
Smart Images
Figure CN223056514U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of cold stamping processing, especially the field of cold heading and back pressure technology, and specifically provides a precision stamping structure for cold heading and back pressure contour Background Art
[0002] A stamping die is a special process equipment for processing materials into parts in cold stamping processing; stamping is a pressure processing method that applies pressure to the material using a die on a press at room temperature to cause separation or plastic deformation, thereby obtaining the required parts.
[0003] In blanking and cold heading and other forming processes, it is used to become a workpiece with a specific shape and size under the action of external force. For products with cold heading contour, multiple dies are required to meet the requirements of the product contour. The increase in processes will lead to an increase in production costs and time, and at the same time, it will reduce production efficiency and cannot guarantee the quality stability of parts. Summary of the Invention
[0004] In view of the above-mentioned disadvantages of the prior art, the purpose of the utility model is to provide a precision stamping structure for cold heading and back pressure contour to solve the difficulties of the prior art.
[0005] To achieve the above purpose and other related purposes, the utility model provides a precision stamping structure for cold heading and back pressure contour, including an upper die assembly and a lower die assembly arranged directly below the upper die assembly;
[0006] One end of the upper die assembly close to the lower die assembly is provided with an upper stripper insert 12, through which a punching punch 9 passes, and one end of the upper stripper insert 12 close to the lower die assembly is provided with a stepped structure corresponding to the part bending edge;
[0007] The lower die assembly is provided with a lower die insert 16 for placing the part below the upper stripper insert 12, and an outer pipe position 18 matched with the stepped structure is also arranged on the side of the lower die insert 16.
[0008] According to the preferred scheme, the upper die assembly is sequentially provided with an upper die base 1, an upper clamping plate 6, an upper stripper 10 and an upper stripper insert 12 along the direction close to the lower die assembly;
[0009] Equal-height sleeves 2, springs 3 and an upper backing plate 4 are installed in the upper die base 1;
[0010] An upper clamping plate insert 8 is installed in the upper clamping plate 6, a punching punch 9 is installed in the upper clamping plate insert 8, and the bottom of the punching punch 9 sequentially passes through the upper stripper 10 and the upper stripper insert 12 to punch the part.
[0011] According to the preferred solution, the upper backing plate 4 is arranged directly above the insert 8 of the upper clamping plate, and the size of the upper backing plate 4 is not less than that of the insert 8 of the upper clamping plate.
[0012] According to the preferred solution, the upper stripper insert 12 is arranged in a T-shaped structure, including a horizontal end and a vertical end, and a stepped structure is formed at the connection of the horizontal end and the vertical end;
[0013] When bending, the top end face of the part abuts against the lower side of the horizontal end, and the vertical inner side face of the part closely adheres to the vertical end.
[0014] According to the preferred solution, the lower die assembly is successively provided with a lower template 13, a lower backing plate 19, and a lower die base 20 along the direction close to the upper die assembly. A lower pad foot 21 is connected below the lower die base 20, and a lower support plate 22 is connected below the lower pad foot 21;
[0015] A lower die insert 16 is arranged in the lower template 13 corresponding to the upper stripper insert 12. An outer guide position 18 is installed on the lower die insert 16, and a gap for inserting the part is formed between the outer guide position 18 and the vertical end of the upper stripper insert 12;
[0016] A lower die punching 24 is arranged in the lower die insert 16 corresponding to the punching punch 9.
[0017] According to the preferred solution, an inner guide post 7 is installed in the upper clamping plate 6. When the inner guide post 8 moves towards the lower die assembly, it successively passes through the upper stripper plate 10, the lower template 13, and the lower backing plate 19. Upper inner guide sleeves 11 and lower inner guide sleeves 14 are respectively arranged in the upper stripper plate 10 and the lower template 13 corresponding to the movement of the inner guide post 8.
[0018] According to the preferred solution, an upper limit post 5 is connected below the upper die base 1, and a lower limit post 23 is connected to the lower die base 20 correspondingly.
[0019] According to the preferred solution, an inner limit 15 is also installed on the lower template 13, and the top of the inner limit 15 extends out of the lower template 13;
[0020] When the upper stripper plate 10 reaches the bottom dead center, the top of the inner limit 15 abuts against the lower side of the upper stripper plate 10.
[0021] According to the preferred solution, the bottom of the upper stripper plate 10 is provided with a stepped first groove 25 and a second groove 26 corresponding to the upper stripper insert 12 and the outer guide position 18;
[0022] The horizontal end of the upper stripper insert 12 is installed in the first groove 25;
[0023] The part and the outer guide position 18 are accommodated in the second groove 26.
[0024] According to the preferred solution, the outer guide position 18 is arranged on the circumference of the upper stripper insert 12 according to the bending requirements of the part.
[0025] According to a preferred embodiment, a lower die insert 17 is further installed in the upper stripper insert 12 corresponding to the punching punch 9.
[0026] According to a preferred embodiment, the lower die inserts 17 are arranged at intervals and have the same size.
[0027] The utility model realizes cold upsetting and back pressure on the end face of the bent edge of the part after punching by using the upper stripper insert and the lower die insert, ensures the surface profile of the end face of the bent edge of the part, reduces the number of stamping processes of the part, reduces the die cost, and improves the production efficiency.
[0028] In the following, the optimal embodiments for implementing the utility model will be described in more detail with reference to the accompanying drawings, so as to easily understand the features and advantages of the utility model. Brief Description of the Drawings
[0029] Figure 1 It shows a schematic structural view of the utility model;
[0030] Figure 2 It shows a top view of the utility model;
[0031] Description of Reference Numerals
[0032] 1. Upper die holder; 2. Equal-height sleeve; 3. Spring; 4. Upper backing plate; 5. Upper limit post; 6. Upper clamping plate; 7. Inner guide post;
[0033] 8. Upper clamping plate insert; 9. Punching punch; 10. Upper stripper; 11. Upper inner guide sleeve; 12. Upper stripper insert; 13. Lower template; 14. Lower inner guide sleeve; 15. Inner limit; 16. Lower die insert; 17. Lower die insert; 18. Outer tube position; 19. Lower backing plate; 20. Lower die holder; 21. Lower pad foot; 22. Lower support plate; 23. Lower limit post; 24. Lower die punching; 25. First groove; 26. Second groove. Detailed Description of the Preferred Embodiment
[0034] In order to make the objectives, technical solutions and advantages of the technical solutions of the utility model clearer, in the following, the technical solutions of the embodiments of the utility model will be clearly and completely described with reference to the accompanying drawings of the specific embodiments of the utility model. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only a part of the embodiments of the utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the utility model without creative efforts shall fall within the scope of protection of the utility model.
[0035] Compared with the embodiments shown in the drawings, the feasible embodiments within the protection scope of the present utility model may have fewer components, have other components not shown in the drawings, different components, components arranged differently, or components connected differently, etc. In addition, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.
[0036] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings understood by those of ordinary skill in the field to which the present utility model belongs. The terms "first", "second" and similar terms used in the specification and claims of the patent application of the present utility model do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, terms such as "a" or "one" do not necessarily denote a quantity limitation. Terms such as "comprising" or "including" mean that the elements or items appearing before this word cover the elements or items listed after this word and their equivalents, without excluding other elements or items. Terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Terms such as "upper", "lower", "left", "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.
[0037] The present utility model provides a precision cold heading and back pressure profiling stamping structure for cold stamping processing. The present utility model does not limit the type of parts, but this precision cold heading and back pressure profiling stamping structure is particularly suitable for products with punched holes, bent edges, and requirements for cold heading profiling.
[0038] Generally, the precision cold heading and back pressure profiling stamping structure proposed by the present utility model mainly includes an upper die assembly and a lower die assembly disposed directly below the upper die assembly. Among them, reference can be made to Figure 1 , which shows the layout relationship between the upper die assembly and the lower die assembly.
[0039] In order to achieve cold heading, punching, and bending edges in the same mold, and to achieve the purpose of cold heading profile, to solve the problem in the background technology that in forming processes such as blanking and cold heading, to become a workpiece with a specific shape and size under the action of external force, for products with cold heading profile requirements, multiple molds are required to meet the product profile requirements. The increase in processes will lead to an increase in production costs and time, while reducing production efficiency and unable to ensure the quality stability of parts. Therefore, in the technical solution provided in this embodiment, the upper stripper insert 12 and the lower die insert 16 are used to perform cold heading and repressing on the end face of the bent edge of the part after punching, ensuring the surface profile of the end face of the bent edge of the part, reducing the number of part stamping processes, reducing die costs, and improving production efficiency.
[0040] As Figure 1 shown, the upper die assembly is sequentially provided with an upper die base 1, an upper clamping plate 6, an upper stripper 10, and an upper stripper insert 12 along the direction close to the lower die assembly. An equal-height sleeve 2, a spring 3, and an upper backing plate 4 are installed in the upper die base 1. An upper clamping plate insert 8 is installed in the upper clamping plate 6. A punching punch 9 is installed in the upper clamping plate insert 8. The bottom of the punching punch 9 sequentially passes through the upper stripper 10 and the upper stripper insert 12 to punch the part; wherein the upper backing plate 4 is arranged directly above the upper clamping plate insert 8, and the size of the upper backing plate 4 is not less than that of the upper clamping plate insert 8, which is used to support the punching punch 9 located below, prevent the punching punch 9 from punching pits or causing other damages to the upper die base 1 during the working process, and at the same time helps to improve the machining accuracy and stability of the die, thereby ensuring the machining quality of the product.
[0041] Similarly, the lower die assembly is sequentially provided with a lower template 13, a lower backing plate 19, and a lower die base 20 along the direction close to the upper die assembly. A lower pad foot 21 is connected below the lower die base 20, and a lower support plate 22 is connected below the lower pad foot 21. A lower die insert 16 is arranged in the lower template 13 corresponding to the upper stripper insert 12. A lower die punching 24 is arranged in the lower die insert 16 corresponding to the punching punch 9. The part to be processed is placed on the lower die insert 16;
[0042] In order to facilitate the replacement of vulnerable parts and the mating with high-precision punching requirements, a lower die insert 17 is also installed in the upper stripper insert 12 corresponding to the punching punch 9. When the lower die insert 17 is damaged, the insert can be replaced individually without replacing the entire die, thereby greatly extending the overall service life of the die. Further, the sizes of multiple loaded lower die inserts 17 are the same, which can also facilitate die modification without significantly modifying the entire die, not only saving time and cost, but also improving the flexibility of the die.
[0043] Under the combined action of the upper die assembly and the lower die assembly, the operation of punching the part is carried out. In order to ensure the accuracy of punching and cold heading and pressing back the bent edge, in this embodiment, an internal guiding structure and an external guiding structure are respectively provided. Among them, the internal guiding structure adopts an inner guide post 8 that the upper die assembly passes through the upper stripper plate 10, the lower template 13, and the lower backing plate 19 in sequence when moving towards the lower die assembly. At the same time, an upper inner guide sleeve 11 and a lower inner guide sleeve 14 are respectively arranged in the upper stripper plate 10 and the lower template 13 corresponding to the movement of the inner guide post 8 to ensure the stability of the movement of the inner guide post 8; while the external guiding structure adopts an upper limit post 5 connected to the lower part of the upper die base 1 and a corresponding lower limit post 23 arranged on the lower die base 20.
[0044] It should be specifically noted that the upper die assembly and the lower die assembly provided in this embodiment can cold heading and press back the end face of the bent edge of the part after punching, ensuring the surface profile of the end face of the bent edge of the part. Structurally, a stepped structure is provided at one end of the upper stripper plate insert 1 assembly 2 close to the lower die assembly corresponding to the bent edge of the part, and an outer tube position 18 that mates with the stepped structure is also provided on the side of the lower die insert 16.
[0045] As described above, the upper stripper plate insert 12 in the upper die assembly is arranged in a T-shaped structure, including a horizontal end and a vertical end, and a stepped structure is formed at the connection of the horizontal end and the vertical end; the corresponding outer tube position 18 in the lower die assembly is installed on the lower die insert 16. In order to correspond to the bent structure on both sides of the part, at least one pair of outer tube positions 18 are provided, which are respectively arranged on both sides of the vertical end of the upper stripper plate insert 12, and a gap for inserting the part is formed between the outer tube position 18 and the vertical end of the upper stripper plate insert 12;
[0046] In addition, the outer tube position 18 is arranged around the upper stripper plate insert 12 according to the requirements of the part bending;
[0047] When bending, the top end face of the part abuts against the lower part of the horizontal end, and the vertical inner side face of the part closely adheres to the vertical end.
[0048] On this basis, considering the precise mating of the outer tube position 18 with the upper stripper plate 10 and the upper stripper plate insert 12, on the one hand, an inner limit 15 is also installed on the lower template 13, and the top of the inner limit 15 extends out of the lower template 13. When the upper stripper plate 10 reaches the bottom dead center, the top of the inner limit 15 abuts against the lower part of the upper stripper plate 10 to achieve the limitation of the height;
[0049] On the other hand, a stepped first groove 25 and a second groove 26 are formed at the bottom of the upper stripper plate 10 corresponding to the upper stripper plate insert 12 and the outer tube position 18. When the next cold heading and pressing back the bent edge operation is carried out after the punching of the upper die assembly is completed, the part and the outer tube position 18 are accommodated in the second groove 26, and the horizontal end of the upper stripper plate insert 12 is installed in the first groove 25.
[0050] During use, it includes the following technological steps:
[0051] S1: During stamping, the power device drives the punch slider to lift the entire upper die assembly, separating the upper die assembly from the lower die assembly;
[0052] S2: At this time, place the part on the lower die insert 16 and complete the positioning using the outer pipe position 18;
[0053] S3: The upper die assembly moves vertically downward under the action of the power device and the punch slider, and the inner guide pillar 7 enters the inner guide sleeve 14 to complete the die guiding;
[0054] S4: The entire upper die assembly continues to move downward, and the upper stripper insert 12 first contacts the bottom plane of the part and presses the part downward to complete the punching operation of the part;
[0055] S5: Subsequently, the stepped surface of the upper stripper insert 12 contacts and presses against the upper end surface of the bent edge of the part, while the upper surface of the upper stripper 10 contacts and presses against the lower surface of the upper clamping plate 6, and the lower surface of the upper limit post 5 contacts and presses against the upper surface of the lower limit post 23. The cold heading and repressing of the bent edge end surface of the part are completed. At this time, the lower dead center of the upper die operation is reached and the stamping ends;
[0056] S6: After stamping, under the action of the power device, the upper die moves upward to separate the upper die from the lower die. The upper stripper insert 12 is pushed downward from the punching punch 9 under the action of the spring 3 force to separate from the part. At this time, all components of the upper die and the lower die of the die return to their initial positions, and the part is taken out to perform the next stamping process.
[0057] The above embodiments only illustrate the principle and its effects of the present invention by way of example, rather than limiting the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.
Claims
1. A precision stamping structure for cold heading and back pressure profile, characterized in that, It includes an upper die assembly and a lower die assembly arranged directly below the upper die assembly; One end of the upper die assembly close to the lower die assembly is provided with an upper stripper insert (12). A punching punch (9) passes through the upper stripper insert (12). One end of the upper stripper insert (12) close to the lower die assembly is provided with a stepped structure corresponding to the bent edge of the part; Below the upper stripper insert (12) of the lower die assembly, there is a lower die insert (16) for placing the part. On the side of the lower die insert (16), there is also an outer pipe positioner (18) that mates with the stepped structure; The upper die assembly is sequentially provided with an upper die base (1), an upper clamping plate (6), an upper stripper plate (10), and an upper stripper insert (12) along the direction close to the lower die assembly; In the upper die base (1), equal-height sleeves (2), springs (3), and an upper backing plate (4) are installed; In the upper clamping plate (6), upper clamping plate inserts (8) are installed. In the upper clamping plate inserts (8), punching punches (9) are installed. The bottom of the punching punches (9) sequentially passes through the upper stripper plate (10) and the upper stripper insert (12) to punch the part; The upper stripper insert (12) is arranged in a T-shaped structure, including a horizontal end and a vertical end. A stepped structure is formed at the connection of the horizontal end and the vertical end; During bending, the top end face of the part abuts against the lower part of the horizontal end, and the vertical inner side of the part closely adheres to the vertical end; The lower die assembly is sequentially provided with a lower template (13), a lower backing plate (19), and a lower die base (20) along the direction close to the upper die assembly. The lower die base (20) is connected to a lower pad foot (21) below, and the lower pad foot (21) is connected to a lower support plate (22) below; In the lower template (13), a lower die insert (16) is provided corresponding to the upper stripper insert (12). An outer pipe positioner (18) is installed on the lower die insert (16). A gap for inserting the part is formed between the outer pipe positioner (18) and the vertical end of the upper stripper insert (12); In the lower die insert (16), a lower die punching (24) is provided corresponding to the punching punch (9); An inner positioner (15) is also installed on the lower template (13). The top of the inner positioner (15) extends out of the lower template (13); When the upper stripper plate (10) reaches the bottom dead center, the top of the inner positioner (15) abuts against the lower part of the upper stripper plate (10); At the bottom of the upper stripper plate (10), a stepped first groove (25) and a second groove (26) are provided corresponding to the upper stripper insert (12) and the outer pipe positioner (18); The horizontal end of the upper stripper insert (12) is installed in the first groove (25); The part and the outer pipe positioner (18) are accommodated in the second groove (26); A lower die insert (17) is also installed in the upper stripper insert (12) corresponding to the punching punch (9).