Defect Analysis and Margin Control Method of Precision Casting Processing of Complex Diffuser
Aiming at insufficient casting allowance and uneven thickness of welding stops at the processing location of a complex precision casting diffuser,the paper analyzes its deformation mechanism in the machining process.Three coordinates testing,scribing inspection,allowance trial cutting and other methods are used to determine the location and size of defects in the internal and external air-intake tubes and to control the processing requirements for casting allowance of raw materials.The results show that by the method proposed in this paper the consistency of machining dimensions of casting diffusers is guaranteed and the machining difficulty is reduced.This study can effectively solve the problem that about 96%of the casting parts are scrapped due to their serious defects and deformation.It can provide a reference for pre-testing and machining of general casting parts.
special castinginvestment castingdiffusercasting defectsallowance control
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