Rotary forging connection process for homogeneous or heterogeneous metal tubes and bars

Abstract

The invention discloses a rotary forging connection process for homogeneous or heterogeneous metal tubes and bars. The process includes preparing a metal bar and tube to be connected; if the inner diameter of the tube is larger than the outer diameter of the bar, machining directly; if the outer diameter of the bar is larger than the inner diameter of the tube, turning the end connection parts of the bar for premachining until the outer diameter is smaller than the inner diameter of the tube; after preparation, inserting the end connection parts of the bar into the inner hole of the tube; utilizing a rotary forging die to perform rotary forging retraction machining on the outside of the tube; the interior of the bar clamps the exterior of the bar through the machining deformation amount; performing rotary forging necking continuously, and allowing the tube material to follow axially; after the rotary forging, connecting the two materials firmly.

Description

technical field [0001] The invention belongs to the field of machining technology. Background technique [0002] Welding (connection) between different metals is difficult, and some specific metals cannot be fixed by welding (such as titanium and stainless steel) using conventional welding techniques. The traditional riveting, threaded connection and other methods have a single force point, which is easy to damage, and cannot be applied to the occasions where sealing (air-tight, liquid-tight) is required. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a swaging connection process between pipes and bars of the same or dissimilar metal materials, which solves the problem of connection between pipes and bars of the same or dissimilar metal materials, the connection is firm, the connection is uniform, The process is efficient and reliable. [0004] The technical scheme of the present invention is: a swaging connection process between pip...

AI Technical Summary

Problems solved by technology

[0002] There are certain difficulties in welding (connecting) between different metals. Conventional welding techniques cannot be used for welding for some specific metals (such as titanium and stainless steel).

However, the traditional riveting and threading methods have a single stress point, are easily damaged, and cannot be applied to occasions that require sealing (airtight, liquid-tight)

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