Current-carrying inertial axial friction composite welding method and equipment thereof

Abstract

The invention relates to a current-carrying inertial axial friction composite welding method and equipment thereof. In the inertial axial friction welding process, a unique current loading method without an electric brush is adopted, current is introduced into a friction welding head to enable a friction interface to generate resistance heat, and the resistance heat and friction heat form a friction composite heat source for together heating joints and carrying out friction and plastic deformation to realize the purpose of welding through the method and the equipment. The method and the equipment can shorten the heating time of friction welding, improve the production efficiency of welding, the friction pressure, the power of a main shaft and the special requirements for the capacity of afriction welding machine, can adopt resistance heat to carry out heat treatment after welding and preheating before welding on welding seams and improve the structure property of joints, and are especially suitable for friction welding of rotator joints of high-melting point and high-hardness dissimilar materials, small-size pipes or bars and the like.

Description

technical field [0001] The invention belongs to the field of welding technology, and relates to a current-carrying inertial axial friction composite welding method and equipment thereof, relates to a current loading mode of current-carrying inertial axial friction welding, and also relates to a current loading device of current-carrying inertial friction welding. Background technique [0002] Friction welding is usually that two workpieces to be welded rotate and rub against each other under a certain friction pressure, generating frictional heat, and the frictional heat forms a plasticized area on the contact friction surface of the two workpieces to be welded. The materials are plasticized, mixed and then cooled to form the friction welded joint. In the friction welding process, the friction heat source comes from the plastic deformation layer of high-speed friction on the metal surface, which is converted into heat energy through mechanical energy, so that the welding zon...

AI Technical Summary

Problems solved by technology

This is a mode of endogenous resistance heat, which can simply and effectively use resistance heat in the welding process to achieve a composite heat source welding process, so if this principle is applied to inertial axial friction welding, which is essentially different from it Among them, it also has the same advantages, which is beneficial to solve the problem of insufficient frictional heat in the conventional friction welding process; but the invention patent does not explain the key current loading method and equipment composition

[0006] The existing utility model patent "A Device for Resistance Heat-Friction Stir Composite Welding Stainless Steel" (application number: 200820228426.2), its main feature is that the two output ends of the power supply are connected to the input end of the transformer through a cable, and one output end of the transformer The end of the transformer is connected to the backing plate through the cable, and the backing plate is used to place the workpiece to be welded. The other output end of the transformer is connected to the brush through the cable. The large current is introduced into the workpiece to be welded through the stirring needle, and the joint action of resistance heat and frictional heat is generated to realize the welding process; this utility model patent is in the invention patent "conductive-frictional stirring composite heat source welding method and equipment" (application number: 20071009974.7) It was applied for later, and this patent uses a brush, which is easy to generate discharge phenomenon on the brush, which is not conducive to the adjustment and control of the welding process and welding current. The use process is very unsafe, and at the same time it causes poor electrical contact and poor welding effect.

Images