Die for producing aluminum welding pin

Abstract

The utility model belongs to aluminum welding nail production equipment field, propose a kind of mould for aluminum welding nail production, including upper die, lower die, convex surface and concave surface, bolt connection hole is arranged in the position of upper die near its top radially, the bottom surface center of convex surface is provided with the boss of taper surface, the side of boss is provided with 3 radial protrusions distributed radially, the top of lower die is the inner circle outer edge structure, the outside edge of the top of lower die is all provided with angular wedge.The boss and radial protrusion of the upper die provided by the utility model can form central groove and exhaust groove on the top of product under the cold heading operation of cold heading equipment, which is beneficial to the discharge of welding steam during the rapid welding process of aluminum welding nail and improves the welding quality of aluminum welding nail;the design of outer circle inner edge on the top of lower die can improve its stability on cold heading equipment, and the use of angular wedge can provide bevel, which is beneficial to the disassembly and replacement of lower die with the aid of tool.

Description

Technical Field

[0001] This utility model belongs to the field of aluminum welding stud production equipment, and in particular relates to a mold for aluminum welding stud production. Background Technology

[0002] Aluminum welding studs are metal connectors made primarily of aluminum or aluminum alloys, commonly used in construction, automotive manufacturing, aerospace, and other fields. They are typically welded using a stud welding machine, which employs a lifting welding torch to melt the stud head with an electric current within a short time, completing the welding process before an oxide film forms. The forming stage of aluminum welding studs primarily utilizes cold heading, where aluminum rods are cut into fixed-length segments and then extruded and forged using a cold heading machine's die, forming the stud head and shank in a single pass without additional cutting, thus ensuring metal density and strength.

[0003] Most existing aluminum welding studs have a flat top surface, and the bottom of the corresponding upper mold groove is also flat. Therefore, the welding vapor generated during rapid welding is not easily discharged, affecting the welding quality. Furthermore, aluminum welding studs have a variety of shank shapes and specifications. The lower mold used for forming aluminum welding studs is generally nested on the cold heading table, and the top surface of the lower mold is flush with the cold heading plane of the cold heading table, which makes it difficult to replace. Utility Model Content

[0004] This utility model addresses the technical problems existing in the above-mentioned molds for cold heading of aluminum welding nails, and proposes a reasonably designed, easily replaceable mold for producing new types of aluminum welding nails.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: The mold for producing aluminum welding nails provided by this utility model includes an upper mold and a lower mold. The bottom of the upper mold and the interior of the lower mold are respectively provided with a convex surface and a concave surface for forming aluminum welding nails. The upper mold has bolt connection holes radially provided near its top. The bottom center of the convex surface is provided with a conical boss. The side of the boss is provided with three radially distributed protrusions. The top of the lower mold has an inner circle and outer edge structure. An angular wedge is provided on the outer edge of the top of the lower mold. The angular wedge is a triangular pyramid structure and its apex is offset from the center direction of the lower mold. The top surface of the angular wedge is on the same plane as the top surface of the lower mold. One side of the angular wedge is on the same plane as one edge side of the lower mold. A bevel is provided at the intersection of the other two sides of the angular wedge.

[0006] Preferably, the top outer side of the lower mold is a regular hexagonal face, and each face is provided with an oil groove, the axis of which intersects the central axis of the lower mold.

[0007] Preferably, the thickness of the boss is less than the thickness of the radial protrusion.

[0008] Preferably, the minimum distance from the radial protrusion to the center of the convex surface is less than the minimum radius of the boss.

[0009] Compared with the prior art, the advantages and positive effects of this utility model are as follows: The mold for producing aluminum welding studs provided by this utility model has an upper mold boss and radial protrusions that can form a central groove and venting groove on the top of the product during cold heading operation, which is beneficial for the discharge of welding vapors during rapid welding and improves the welding quality of the aluminum welding studs. The design of the top of the lower mold with an outer circle and inner edge improves its stability on the cold heading equipment, and the use of angular wedges provides a bevel, which is convenient for replacing the lower mold with tools. This utility model is reasonably designed, easy to replace, and suitable for producing new types of aluminum welding studs, making it suitable for large-scale promotion. Attached Figure Description

[0010] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 An exploded view of the mold for producing aluminum welding studs provided in the embodiment; Figure 2 A cross-sectional view of the mold used for producing aluminum welding studs and the aluminum welding studs under mold closing conditions; Figure 3 A perspective view of the upper mold provided for the embodiment; In the above figures: 1. Upper mold; 11. Convex surface; 12. Bolt connection hole; 13. Boss; 14. Radial protrusion; 2. Lower mold; 21. Concave surface; 22. Angular wedge; 23. Oil groove; 24. Bevel; 3. Aluminum welding stud; 31. Center groove; 32. Venting groove. Detailed Implementation

[0012] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0013] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0014] Examples, such as Figures 1-3 As shown, the mold for producing aluminum welding studs provided by this utility model includes an upper mold 1 and a lower mold 2. The bottom of the upper mold 1 and the interior of the lower mold 2 are respectively provided with a convex surface 11 and a concave surface 21 for forming aluminum welding studs 3. The upper mold 1 has a bolt connection hole 12 radially provided near its top position. The bolt connection hole 12 is used to connect and fix the upper mold 1 to the cold heading moving end of the cold heading machine. A conical boss 13 is provided at the center of the bottom surface of the convex surface 11. The conical design facilitates demolding. The side of the boss 13... The surface is provided with three radially distributed protrusions 14. The top of the lower mold 2 has an inner circle and outer edge structure. An angular wedge 22 is provided on the outer edge of the top of the lower mold 2. The angular wedge 22 has a triangular pyramid structure and its apex is offset from the center direction of the lower mold 2. The top surface of the angular wedge 22 is on the same plane as the top surface of the lower mold 2. One side of the angular wedge 22 is on the same plane as one edge side of the lower mold 2. A bevel 24 is provided at the intersection of the other two sides of the angular wedge 22.

[0015] Specifically, the boss 13 of the upper mold 1 is used to form a central groove 31 on the top of the blank, and the radial protrusion 14 is used to form a venting groove 32 on the top of the blank. The convex surface 11 and the concave surface 21 can form a product that meets the requirements under the cold heading operation of the cold heading equipment. For aluminum welding studs 3 with a central groove 31 and a venting groove 32, it is beneficial to discharge welding steam during the rapid welding process, which is beneficial to improving the welding quality of aluminum welding studs 3. As for the lower die 2, it has a hollow T-shaped structure. The central through part of the lower die 2 is used for blank forming on the one hand and for ejector pins to push out the formed product on the other hand. The top adopts an outer circle and inner edge design. Its multi-faceted surface can improve its stability on the cold heading equipment. The bevel 24 can be provided by the angular wedge 22. The cross-section of the bevel 24 is rectangular. The vertical height of the rectangle is less than 1 / 10 of the vertical ratio of the angular wedge, so it will not affect the nesting reliability of the lower die 2 and the cold heading equipment. Applying pressure to the bevel 24 with a tool can make the angular wedge 22 move upward, which makes it easy to replace the lower die 2.

[0016] To facilitate the replacement of the lower mold 2, the outer top of the lower mold 2 provided by this utility model is a regular hexagonal face, and each face is provided with an oil groove 23. The axis of the oil groove 23 intersects with the central axis of the lower mold 2. The oil groove 23 can store oil. After the lower mold 2 is installed on the cold heading equipment, the oil groove 23 stores a certain amount of oil to form a sealing film, avoiding large-area thermal adhesion between the lower mold 2 and the cold heading equipment. On the other hand, by using a tool to apply pressure to the bevel 24, the pyramidal surface of the angular wedge 22 can be transferred to different faces of the hexagonal face, which can further promote the upward movement of the lower mold 2, which helps to reduce the difficulty of replacing the lower mold 2.

[0017] To improve the rapid welding quality of the aluminum welding stud 3, the thickness of the boss 13 provided in this invention is less than the thickness of the radial protrusion 14. Consequently, the depth of the central groove 31 formed on the aluminum welding stud 3 is shallower than the depth of the venting groove 32. During rapid welding, welding vapors can be quickly discharged from the central groove 31 to the venting groove 32, and then discharged from the venting groove 32, thereby improving welding quality. Furthermore, the minimum distance from the radial protrusion 14 to the center of the convex surface 11 provided in this invention is less than the minimum radius of the boss 13. Therefore, the venting groove 32 formed on the aluminum welding stud 3 has a certain overlap with the central groove 31, further promoting the rapid discharge of welding vapors.

[0018] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A mold for producing aluminum welding studs, comprising an upper mold and a lower mold, wherein the bottom of the upper mold and the interior of the lower mold are respectively provided with a convex surface and a concave surface for forming aluminum welding studs, and the upper mold has bolt connection holes radially provided near its top, characterized in that, The bottom center of the convex surface is provided with a conical boss, and the side of the boss is provided with three radially distributed protrusions. The top of the lower mold is an inner circle with an outer edge structure. An angular wedge is provided on the outer edge of the top of the lower mold. The angular wedge is a triangular pyramid structure and its apex is offset from the center direction of the lower mold. The top surface of the angular wedge is on the same plane as the top surface of the lower mold. One side of the angular wedge is on the same plane as one edge side of the lower mold. A bevel is provided at the intersection of the other two sides of the angular wedge.

2. The mold for producing aluminum welding studs according to claim 1, characterized in that, The top outer side of the lower mold is a regular hexagonal face, and each face is provided with an oil groove. The axis of the oil groove intersects with the central axis of the lower mold.

3. The mold for producing aluminum welding studs according to claim 2, characterized in that, The thickness of the boss is less than the thickness of the radial protrusion.

4. The mold for producing aluminum welding studs according to claim 3, characterized in that, The minimum distance from the radial protrusion to the center of the convex surface is less than the minimum radius of the boss.

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