Forming method of novel rivet

Abstract

The invention belongs to the field of cold forming, and particularly relates to a forming method of a novel rivet. The forming method of the novel rivet comprises the following steps that a, a clamp is used for fixing one end of a raw material rivet, the raw material rivet comprises a rivet head, a polish rod and a tail end, and the tail end faces a tail extrusion die; b, a heating mechanism is used for heating the tail ends of the raw material rivets; c, the tail end of the raw material rivet is conveyed into a tail extrusion die, the tail extrusion die is a female die cavity arranged in a split mode, and a punching rod is arranged at the bottom of the die cavity; d, axial jacking force is applied to the rivet head of the raw material rivet through a jacking mechanism, so that the tail of the heated raw material rivet begins to extrude in the die cavity of the female die, and the die cavity is gradually filled with metal at the tail under the principle that the volumes are equal; and e, the die cavities arranged in a split mode are separated, the rivet is pushed by the punching rod to be separated from the female die, and forming is completed. The problems of tail structure machining cost and time cost can be effectively solved, so that rapid production of rivets is guaranteed, and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of cold forming, in particular to a novel rivet forming method. Background technique [0002] Rivets are mainly used in the field of fastening and connection of high-strength components with holes (between steel, aluminum alloy, and stainless steel). The tail structure of the new rivet is narrow in the middle and wide on both sides. Therefore, the existing processing methods are mostly lathe machining. A small number of teeth are rubbed with dental plates. [0003] The structure of the tail of the existing short-tail single-slot rivet is relatively simple. At the same time, it is easy to cause dislocation of the fitting position when it is matched with the tool, resulting in damage to the tail after riveting, which cannot be used again, and also reduces the service life of the tool. How to effectively solve the tail structure? Processing costs and time costs, so as to ensure rapid production of rivets and r...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a new rivet forming method that can effectively solve the problem of tail structure processing cost and time cost, thereby ensuring rapid production of rivets and reducing production costs

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