Rivet forming device and rivet forming method

Abstract

The invention belongs to the technical field of rivet type contact manufacturing, and particularly relates to a rivet forming device and a rivet forming method. The rivet forming device comprises a rack, a forming die device, a silver shearing device, a silver wire inlet device, a copper shearing device and a copper wire inlet device. A copper cutter in the copper shearing device is of a bidirectional shearable structure, a copper wire is secondarily fed to be secondarily sheared by the copper cutter corresponding to forward movement and reverse movement of the copper cutter, the binding forcebetween a silver material and a copper material is improved, and the use stability of a rivet product at a client side is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of rivet-type contact manufacturing, and in particular relates to a rivet forming device and a forming method. Background technique [0002] Silver contacts, also known as rivet contacts, have been widely used in electrical switch circuit contact parts, such as circuit disconnecting and closing devices of switches, thermostats, relays and other products. In the prior art, the processing of the working layer of the rivet contact generally adopts composite rivet electric shock, and two kinds of processes are mainly used in the processing process of composite rivet electric shock, one is high temperature brazing, the other is cold heading pressure welding, However, high-temperature brazing will cause an oxide layer on the surface of the product during processing, which will increase the difficulty of product processing, so the cold heading pressure welding process is generally used. Common composite rivets are...

AI Technical Summary

Problems solved by technology

The inventor found in actual work that the joint surface of copper wire 6' and silver wire 5' of the rivet formed by the above-mentioned bimetallic composite cold heading machine is as Figure 2 shows that the cross-section of the combination of silver and copper is rough side to rough side, smooth side to smooth This leads to half of the bonding force between the silver material and the copper material of the rivet product is relatively good, while the other half of the silver material and the copper material are relatively weak.

This leads to the fact that the silver alloy layer is easily separated from the copper layer during the electrical life test of the rivet product, which leads to the rapid burning of the silver layer and easily leads to safety accidents.

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