Electron bombardment welding turbine shaft, and producing technique

Abstract

This invention relates to a technology for welding turbine shafts with vacuum electronic beams, in which a hole of 1-2mm deep is set at the center of a turbine welding end face and a hole of 1-2mm deep is set correspondingly at the center of a turbine shaft end face and concentricity of the two is kept by a special tool to keep the welding end faces parallel and connected fixedly by vacuum electronic beam welding. The method includes: processing a turbine welding end face and setting a hole of 1-2mm deep at the center, processing a shaft welding end face and setting a hole of 1-2mm deep correspondingly at the center to fixedly connect them by vacuum electronic beam welding. Advantages: tensile strength of the welding is greater than original material, high usability of materials, mechanical process stress is small and shaft stability is good.

Description

technical field [0001] The invention relates to a vacuum electron beam welding technology, in particular to the technical field of a vacuum electron beam welding turbine shaft and its production technology. Background technique [0002] At present, the demand for turbochargers in the world is increasing at a rate of 10%, while that in my country is increasing at a rate of 30%. It can be seen that the market demand for turbochargers is huge and the prospect is broad. The assembly and fixation of turbine and turbine shaft is one of the key technologies in the production of turbocharger, which plays an important role in improving the product quality and reducing product cost of turbocharger. Friction welding is now commonly used to fix the turbine to the end of the turbine shaft. In this friction welding method, the utilization rate of the turbine shaft material is only about 35%. During the friction rotation welding process, the center line speed of the welding end face of th...

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Problems solved by technology

In this friction welding method, the utilization rate of the turbine shaft material is only about 35%. During the friction rotation welding process, the center line speed of the welding end face of the turbine shaft is inconsistent, the melting temperature is uneven, the mechanical strength is uneven, and welding stress treatment is required. , the deviation between the turbine and the turbine shaft is large, the machining allowance of the shaft is large, and the machining allowance is large, resulting in large machining stress and affecting the stability of the shaft

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