Cold precision forging technique for Z type contacts

Abstract

The invention discloses a cold precision forging technique for Z type contacts, which relates to the technical field of cold precision forging and solves the problem that the conventional machining technique of post-forging bending can hardly guarantee the designed shapes and application requirements of Z type contacts. The technique includes the steps that: a copper bar directly enters a die, and is blanked and preformed; the preformed blank is annealed to be softened; after the blank receives intermediate treatment, cold precision forging is carried out; another unformed flat-bottomed hole of the cold precision forged blank is reamed; and subsequent treatment is carried out. The technique can guarantee the consistency of the shapes of finished products, and can ensure that the metal fibers of the Z type contacts can be continuously distributed according to the shape of the Z type contacts.

Description

technical field [0001] The invention relates to the technical field of precision cold forging, in particular to an integral precision cold forging forming process of a Z-shaped contact finger used on a high-voltage switch and a lightning arrester thereof. Background technique [0002] Due to various reasons, the structure of the high-voltage switches used in my country's high-voltage power transmission and transformation industry varies greatly, and the performance varies greatly. Among them, the high-voltage switches imported from Japan's Toshiba have the most stable performance, and only the imported series of high-voltage switches are used in large quantities. Z-type tentacles, also translated as contacts. At present, the Z-type contact fingers used in China are basically imported from Japan, and they adopt the processing technology of bending and forming after forging. Since the material of the Z-type finger is pure copper, the springback of the copper during bending wi...

AI Technical Summary

Problems solved by technology

Since the material of the Z-type finger is pure copper, the springback of the copper during bending will cause a large change in angle, and the additional deformation during bending will deform the nearby holes and adjacent parts, making it difficult to ensure the design shape of the Z-type finger and Requirements

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