Pressurizing device and method for vacuum diffusion welding machine

Abstract

This invention disclose a pressure device for vacuum diffusion welding, with the purposes of solving problem of long time weld, too high temperature, which is characterized in adding a vibrating cylinder (1) to present device, precise pressure regulating valve, vibration controlling valve controlled by PLC and PLC matching with (1), wherein, vibrating cylinder (1) and pressure valve (2) share a pressure axis (3), other parts are all rigidly attached, vibrating cylinder (1) is attached to gas source circuit via precise regulating valve and vibration controlling valve and parallel to pressure circuit. The invention can lower welding temperature by 30-300Deg.C, reduce welding time by 20-50%, and improve efficiency of device by 1-3 times.

Description

technical field [0001] The invention relates to a pressurizing device of a vacuum diffusion welding machine, and also relates to a pressurizing method of the pressurizing device of a vacuum diffusion welding machine. Background technique [0002] The executive body of the pressurization device of the vacuum diffusion welding machine is mainly a single pneumatic cylinder or a single hydraulic cylinder. For example, Zhang Fusheng et al. used a single hydraulic cylinder executive body in the diffusion welding machine they developed [Zhang Fusheng, Xiong Jiangtao et al. Development of a new type of radiation heating vacuum welding machine. Journal of Lanzhou University of Technology, 2004, 30: 243-245]. The known form of the pressurization system that takes this type of executive body as the core is as attached figure 1 -a shown. The single-cylinder actuator makes the pressurization can only be selected and combined in three ways: constant pressure, slow rise and slow fall. ...

AI Technical Summary

Problems solved by technology

Based on the above reasons, the vacuum diffusion welding machine shows the following shortcomings: first, the welding time is long, the whole welding process is 5 to 10 hours; the welding temperature is high, generally 0.6 to 0.85T m , where T m is the melting point temperature of the material to be welded

Therefore, the welding efficiency is low; second, due to the high welding temperature, it is not suitable for welding dissimilar materials whose linear expansion coefficients differ by more than 1.5 to 2 times.

Third, it is not suitable for welding aluminum alloys, aluminum-based composite materials and other materials with stable and dense oxide films;

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