Repair method of metal parts based on additive and subtractive manufacturing

Abstract

The invention discloses an additive and subtractive manufacturing based metal part repair method. The additive and subtractive manufacturing based metal part repair method is used for solving the technical problem of the low material utilization rate of an existing metal part repair method. According to the technical scheme, firstly, after to-be-repaired model three-dimensional data are obtained through three-dimensional scanning, subtractive machining is carried out on the worn part of a part, that is, the part is worn through dry high-speed cutting, and a regular surface is obtained; and then additive manufacturing is carried out through an electron beam fuse wire additive process, the deposition additive repair process of the part is completed, meanwhile, the part surface is machined through dry high-speed cutting machining, and a repair part with high surface quality is obtained. According to the additive and subtractive manufacturing based metal part repair method, error accumulation brought by workpiece clamping, taking and placing during original multi-platform machining is avoided, meanwhile, the interference problem happening in the subtractive process of parts of complex structures is solved, and the mechanical performance of the damaged part achieves the level of normal parts. According to the method, the repair process is carried out in a vacuum environment, workpiece clamping only needs to be carried out once, and the material utilization rate is high.

Description

technical field [0001] The invention relates to a method for repairing metal parts, in particular to a method for repairing metal parts based on additive and subtractive material manufacturing. Background technique [0002] With the development of aerospace technology and the improvement of space station construction speed, it is necessary to improve the rocket carrying capacity. The new generation of high-thrust liquid oxygen kerosene rocket engine is the core component of the entire rocket manufacturing, and the turbo pump blisk is the key component. The working environment of the turbine pump blisk is extremely harsh. In addition, the traditional processing method usually adopts precision casting combined with manual polishing, which has low processing efficiency and poor surface quality consistency. Cracks, wear and corrosion pits occur during service, resulting in Very serious accident. Part restoration work is especially important in the aviation sector. [0003] In ...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the deficiency of low material utilization rate of existing metal parts repairing methods, the present invention provides a metal parts repairing method based on additive and subtractive material manufacturing

The invention avoids the error accumulation caused by the clamping and picking and placing of workpieces during multi-platform processing, and at the same time solves the interference problem in the material reduction process of complex structural parts, so that the mechanical properties of damaged parts can reach the level of normal parts