A cold heading die for forming a flat moving contact

Abstract

This utility model relates to a cold heading die for forming a flat contact, comprising an upper die and a lower die. The lower die includes a main module, which is sequentially provided with a roughing station, a fine cutting station, a rough upsetting station, a fine upsetting station, a forming station, and a shearing station. The upper die is provided with a roughing punch corresponding to the roughing station, and a fine cutting punch corresponding to the fine cutting station. A rough upsetting slider and a first sliding groove are provided on one side of the main module corresponding to the rough upsetting station. The lower die is provided with a first forming groove corresponding to the rough upsetting station. The first forming top block is provided with a forming groove. The main module is provided with a fine upsetting slider and a second sliding groove on one side corresponding to the fine upsetting station. The upper mold and the lower mold are respectively provided with a second forming top block corresponding to the fine upsetting station. The second forming top block is provided with a forming recess. The upper mold and the lower mold are respectively provided with a limit block corresponding to the forming station. The limit block is provided with a movable top block at the position of the protrusion. The upper mold is provided with a blanking knife corresponding to the shearing station. The lower mold is provided with a blanking groove corresponding to the shearing station.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker component processing technology, specifically to a cold heading die for forming flat moving contacts. Background Technology

[0002] The moving contact is a component used in circuit breakers that mates with the stationary contact to make or break contact. Existing moving contacts, if too thick, increase cost; if too thin, they are prone to poor contact, affecting energizing performance. Therefore, these problems are addressed by thickening the contact surfaces on both sides of the sheet material. However, current processing methods involve individually loading and processing the sheet, which is time-consuming, and the thickness of the protrusions on both sides is prone to inconsistency, affecting the contact forming quality. This process is costly and difficult, directly impacting the company's product delivery cycle. Utility Model Content

[0003] In summary, to overcome the shortcomings of the prior art, this utility model provides a cold heading mold for forming flat moving contacts.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a cold heading die for forming a flat contact, comprising an upper die and a lower die. The lower die includes a main module, which is sequentially provided with a roughing station, a fine cutting station, a rough upsetting station, a fine upsetting station, a forming station, and a shearing station. The upper die is provided with a roughing punch corresponding to the roughing station, the lower die is provided with a first cutting groove corresponding to the roughing station, the upper die is provided with a fine cutting punch corresponding to the fine cutting station, and the lower die is provided with a second cutting groove corresponding to the fine cutting station. The main module is provided with a rough upsetting slider for rough upsetting the sheet material to form a protrusion and a first sliding groove for the rough upsetting slider to slide on one side corresponding to the rough upsetting station. The upper die and lower die are respectively provided with a first forming station corresponding to the rough upsetting station. The first forming top block is provided with a forming groove for cooperating with the rough upsetting slider to extrude and form the convex part of the sheet material. The main module is provided with a fine upsetting slider and a second sliding groove for fine upsetting the outer arc surface of the convex part on one side corresponding to the fine upsetting station. The upper and lower dies are respectively provided with second forming top blocks corresponding to the fine upsetting stations. The second forming top blocks are provided with forming recesses for fine upsetting the inner contour of the convex part. The upper and lower dies are respectively provided with limit blocks corresponding to the forming stations. The limit blocks are provided with movable top blocks for adjusting the thickness of the convex part of the sheet material at the position of the convex part. The movable top blocks and the limit blocks are detachably connected. The upper die is provided with a blanking knife corresponding to the shearing station. The lower die is provided with a blanking groove corresponding to the shearing station.

[0005] By adopting the above technical solution, the outer contour of the sheet is cut through rough cutting and fine cutting stations, and specific positions of the sheet are cold-forged through rough upsetting, fine upsetting, and forming stations, so that the two sides of the sheet are convex and formed. Then, the fully formed sheet strip is sheared through the shearing station to form multiple individual moving contacts. The sheet first forms convexities in the mold and then performs individual shearing, which is highly efficient. Through two-step cutting and three-step forming, the process is refined, resulting in high-quality finished products with equal thickness of the convex parts on both sides, low cost, and simple operation. The upper and lower molds are respectively equipped with second forming top blocks corresponding to the fine upsetting station. The second forming top blocks are equipped with forming recesses for fine upsetting the inner contour of the convex parts. The convex parts on the upper and lower sides of the sheet are formed separately, resulting in a wider range of quality and more stable forming. The movable top block and the limiting block are detachably connected, and the movable top block is replaceable and adjustable, making it more applicable.

[0006] The present invention further includes: an adjustment groove for adjusting the height of the movable top block at the position corresponding to the position of the limiting block; the height difference between the top surfaces of the limiting block and the movable top block is adjustable.

[0007] By adopting the above technical solution, the height difference between the top surfaces of the limiting block and the movable top block can be adjusted according to the thickness requirements of the protrusion. However, during the use of the mold, the movable top block and the limiting block are detachably connected, and the height difference between the top surfaces of the limiting block and the movable top block remains fixed.

[0008] The present invention further includes: a preliminary forming station is provided between the precision upsetting station and the forming station, and the upper mold and lower mold are provided with the same limiting block and movable top block corresponding to the preliminary forming station.

[0009] By adopting the above technical solution, which is the same as the principle and structure of the molding station, two-step molding is achieved, which further reduces errors, improves molding quality, and increases the pass rate.

[0010] The present invention further comprises: an upper forming part and a lower forming part are provided on one side of the rough upsetting slider corresponding to the forming groove, and the upper forming part and the lower forming part form a forming cavity for forming the protrusion.

[0011] By adopting the above technical solution, the rough upsetting slider moves along the first sliding groove toward the forming groove until it abuts against the forming groove. The upper forming part and the lower forming part limit the range of the protrusion shaping, and the upper and lower protrusions are initially formed through the forming cavity.

[0012] The present invention further includes a shaping groove on one side of the precision upsetting slider corresponding to the second forming top block, which is used to precision upset the outer arc surface of the protrusion.

[0013] By adopting the above technical solution, the precision upsetting slider moves along the second sliding groove to the second forming top block to apply force, and the outer arc surface of the convex part is precision upsetting and shaping through the shaping groove. The structure is simple, the molding is done in steps, and the molding quality is high.

[0014] The present invention further includes: a protective slider for protecting the outer arc surface of the convex part and a third sliding groove for the protective slider to slide on one side of the main module corresponding to the forming station; and a limiting groove for protecting the outer arc surface of the convex part on one side of the protective slider corresponding to the movable top block.

[0015] By adopting the above technical solution, when the thickness of the sheet protrusion is adjusted by the movable top block, the protective slider moves along the third sliding groove to the movable top block and abuts against the limiting block. The built-in spring applies force to protect the slider, and the limiting groove protects the outer arc surface of the protrusion, so that the deformation of the sheet is controlled only by the change in thickness rather than the change in contour.

[0016] The specific embodiments of this utility model are described below with reference to the accompanying drawings and examples. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main module structure of an embodiment of this utility model.

[0018] Figure 2 This is a schematic diagram showing the changes in the sheet material according to an embodiment of the present invention.

[0019] Figure 3 This is a three-dimensional sectional view of a partial structure of the rough upsetting station in an embodiment of this utility model.

[0020] Figure 4 This is a partial planar sectional view of the rough upsetting station in an embodiment of the present invention.

[0021] Figure 5 This is a three-dimensional sectional view of a partial structure of the precision upsetting station in an embodiment of this utility model.

[0022] Figure 6 This is a schematic diagram of the molded product structure according to an embodiment of the present utility model.

[0023] Reference numerals: 1. Main module, 2. Rough cutting station, 21. First cutting groove, 3. Fine cutting station, 31. Second cutting groove, 4. Rough upsetting station, 41. Rough upsetting slider, 411. Upper forming part, 412. Lower forming part, 413. Forming cavity, 42. First sliding groove, 43. First forming top block, 431. Forming groove, 5. Fine upsetting station, 51. Fine upsetting slider, 511. Shaping groove, 52. Second sliding groove, 53. Second forming top block, 531. Forming recess, 6. Forming station, 61. Limiting block, 611. Adjusting groove, 62. Movable top block, 63. Protective slider, 631. Shaping groove, 64. Third sliding groove, 7. Shearing station, 71. Unloading groove, 8. Preliminary forming station, 9. Drive blade. Detailed Implementation

[0024] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0025] See appendix Figures 1-6 This embodiment discloses a cold heading die for forming a flat contact, including an upper die and a lower die. The lower die includes a main module 1, which is sequentially provided with a roughing station 2, a fine cutting station 3, a rough upsetting station 4, a fine upsetting station 5, a forming station 6, and a shearing station 7. The upper die is provided with a roughing punch corresponding to the roughing station 2, the lower die is provided with a first cutting groove 21 corresponding to the roughing station 2, the upper die is provided with a fine cutting punch corresponding to the fine cutting station 3, and the lower die is provided with a second cutting groove 31 corresponding to the fine cutting station 3. On one side of the main module 1 corresponding to the rough upsetting station 4, there is a rough upsetting slider 41 for rough upsetting the sheet to form a protrusion and a first sliding groove 42 for the rough upsetting slider 41 to slide. The upper die and the lower die are respectively provided with a first forming top block 43 corresponding to the rough upsetting station 4. 3. A forming groove 431 is provided for cooperating with the rough upsetting slider 41 to extrude and form the convex part of the sheet. The main module 1 is provided with a fine upsetting slider 51 for fine upsetting the outer arc surface of the convex part and a second sliding groove 52 for the fine upsetting slider 51 to slide on one side corresponding to the fine upsetting station 5. The upper mold and the lower mold are respectively provided with a second forming top block 53 corresponding to the fine upsetting station 5. The second forming top block 53 is provided with a forming recess 531 for fine upsetting the inner contour of the convex part. The upper mold and the lower mold are respectively provided with a limiting block 61 corresponding to the forming station 6. The limiting block 61 is provided with a movable top block 62 for adjusting the thickness of the convex part of the sheet at the position of the convex part. The movable top block 62 is detachably connected to the limiting block 61. The upper mold is provided with a blanking knife corresponding to the shearing station 7. The lower mold is provided with a blanking groove 71 corresponding to the shearing station 7.

[0026] This embodiment further includes the following: the limiting block 61 is provided with an adjustment groove 611 at the position corresponding to the movable top block 62, which allows the movable top block 62 to be adjusted up and down. The height difference between the top surfaces of the limiting block 61 and the movable top block 62 can be adjusted.

[0027] In this embodiment, a preliminary forming station 86 is provided between the fine upsetting station 5 and the forming station 6, and the upper mold and lower mold are provided with the same limiting block 61 and movable top block 62 corresponding to the preliminary forming station 86.

[0028] In this embodiment, the rough upsetting slider 41 is provided with an upper forming part 411 and a lower forming part 412 on one side of the forming groove 431, and the upper forming part 411 and the lower forming part 412 form a forming cavity 413 for forming the protrusion.

[0029] In this embodiment, the precision upsetting slider 51 is provided with a shaping groove 511 on one side corresponding to the second forming top block 53 for precision upsetting the outer arc surface of the protrusion.

[0030] This embodiment further includes the following: the main module 1 is provided with a protective slider 63 for protecting the outer arc surface of the protrusion and a third sliding groove 64 for the protective slider 63 to slide on one side corresponding to the molding station 6; the protective slider 63 is provided with a limiting groove 631 for protecting the outer arc surface of the protrusion on one side corresponding to the movable top block 62.

[0031] The "between" mentioned above does not only refer to the location or position, but also to the interaction between different parts.

[0032] In the description herein, it should be understood that the terms "upper" and "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model 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. For example, taking the rough upsetting slider 41 as an example, the driving insert 9 is disposed on the outside of the rough upsetting slider 41 to drive the rough upsetting slider 41 to move back and forth. Similarly, it can be seen that the rough upsetting slider 41 and the protective slider 63 are both provided with driving inserts 9 on their outside to drive the rough upsetting slider 41 and the protective slider 63 to move back and forth. The punch and the blanking knife are prior art and therefore will not be described in detail.

[0033] Although this document frequently uses terms such as main module 1, rough cutting station 2, first cutting groove 21, fine cutting station 3, second cutting groove 31, rough upsetting station 4, rough upsetting slider 41, upper forming part 411, lower forming part 412, forming cavity 413, first sliding groove 42, first forming top block 43, forming groove 431, fine upsetting station 5, fine upsetting slider 51, shaping groove 511, second sliding groove 52, second forming top block 53, forming recess 531, forming station 6, limiting block 61, adjusting groove 611, movable top block 62, protective slider 63, shaping groove 631, third sliding groove 64, shearing station 7, unloading groove 71, preliminary forming station 86, etc., the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A cold heading die for forming a flat moving contact, characterized in that: The assembly includes an upper die and a lower die. The lower die includes a main module, which is sequentially equipped with a roughing station, a fine cutting station, a rough upsetting station, a fine upsetting station, a forming station, and a shearing station. The upper die is equipped with a roughing punch corresponding to the roughing station, and the lower die is equipped with a first cutting groove corresponding to the roughing station. The upper die is equipped with a fine cutting punch corresponding to the fine cutting station, and the lower die is equipped with a second cutting groove corresponding to the fine cutting station. The main module has a rough upsetting slider and a first sliding groove on one side corresponding to the rough upsetting station for rough upsetting the sheet material to form a protrusion. The upper die and lower die are respectively equipped with a first forming top block corresponding to the rough upsetting station. The first forming top block is equipped with a mechanism for engaging with the rough upsetting plate. The main module has a forming groove for extruding the protrusion of the sheet material into shape by a slider. On one side of the main module corresponding to the fine upsetting station, there is a fine upsetting slider for fine upsetting the outer arc surface of the protrusion and a second sliding groove for the fine upsetting slider to slide. The upper and lower dies are respectively provided with a second forming top block corresponding to the fine upsetting station. The second forming top block is provided with a forming recess for fine upsetting the inner contour of the protrusion. The upper and lower dies are respectively provided with a limit block corresponding to the forming station. The limit block is provided with a movable top block for adjusting the thickness of the sheet material protrusion at the position of the protrusion. The movable top block and the limit block are detachably connected. The upper die is provided with a blanking knife corresponding to the shearing station, and the lower die is provided with a blanking groove corresponding to the shearing station.

2. The cold heading die for forming a flat moving contact according to claim 1, characterized in that: The limiting block is provided with an adjustment groove at the position corresponding to the movable top block, which allows the movable top block to be adjusted up and down. The height difference between the top surfaces of the limiting block and the movable top block can be adjusted.

3. A cold heading die for forming a flattened contact as described in claim 2, characterized in that: A preliminary forming station is provided between the precision upsetting station and the forming station. The upper mold and lower mold are equipped with the same limiting block and movable top block corresponding to the preliminary forming station.

4. A cold heading die for forming a flattened contact as described in claim 1, characterized in that: The rough upsetting slider has an upper forming part and a lower forming part on one side of the forming groove, and the upper forming part and the lower forming part form a forming cavity for forming the protrusion.

5. A cold heading die for forming a flattened contact as described in claim 1, characterized in that: The precision upsetting slider is provided with a shaping groove on one side corresponding to the second forming top block for precision upsetting the outer arc surface of the protrusion.

6. A cold heading die for forming a flattened contact as described in claim 1, characterized in that: The main module is provided with a protective slider and a third sliding groove for the sliding of the protective slider on one side of the forming station to protect the outer arc surface of the protrusion. The protective slider is provided with a limiting groove for protecting the outer arc surface of the protrusion on one side of the movable top block.

Images