Machining method of high-accuracy thin-wall titanium alloy part with open-type structure

Abstract

The invention relates to a machining method of a high-accuracy thin-wall titanium alloy part with an open-type structure. By the reasonable technology route of casting molding, shape rough machining,cryogenic treatment, shape semifinishing, hole through and threaded hole machining, the cryogenic treatment and finish machining, the machining of the high-accuracy thin-wall titanium alloy part withthe open-type structure is achieved. According to the machining method of the high-accuracy thin-wall titanium alloy part with the open-type structure, the cryogenic treatment is taken as a heat treatment way of the part, parameters are determined through technological tests, the part is put into cryogenic treatment equipment, the cryogenic treatment equipment is filled with liquid nitrogen, -80 DEG C and -180 DEG C are reached by stages, the part is correspondingly soaked at -80 DEG C and -180 DEG C for two hours, and then the temperature is raised slowly, and the processes are carried out two times; and the toughness and the cutting performance of the part can be improved on the basis of not reducing the original hardness of a titanium alloy, the part internal stress is removed relatively thoroughly under the condition that the deformation amount is small, and the accuracy of the part is guaranteed.

Description

technical field [0001] The invention relates to a processing method of an open thin-walled titanium alloy part with a high-precision structure, and belongs to the technical field of product forming and processing. Background technique [0002] With the improvement of the precision and stability requirements of parts under harsh working conditions, the corresponding process technology is becoming more and more complex. When processing parts with irregular shapes and open structures, such problems are often encountered: after each process is completed, the parts will be deformed, not only the size will change, but also the position and shape tolerances are difficult to control. To solve such problems, in the past, multiple processing procedures were adopted to reduce the processing amount of each procedure, and a heat treatment procedure was added after each procedure to eliminate processing stress. This method must have the disadvantages of many processes and long cycle time...

AI Technical Summary

Problems solved by technology

When processing parts with irregular shapes and open structures, we often encounter such problems: after each process is completed, the parts will be deformed, not only the size will change, but the position and shape tolerances are also difficult to control

This method must have the disadvantages of many processes and long cycle times for parts with large machining allowances.

Moreover, for titanium alloy parts with thin walls and open structures, after each heat treatment process, due to the release of processing stress and the open structure, the amount of deformation is relatively large

Even if the final margin is small, it cannot guarantee that the deformation is within the expected range

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