A processing method for adaptive milling of the outer surface of the casing

Abstract

A processing method for adaptive milling of the outer surface of the opening case, determining the trajectory planning of the adaptive milling process for the outer surface of the opening case, determining the online measurement trajectory planning of the outer surface of the opening case, and generating a strip with a software post-processing method. Machining programs with adaptive milling compensation variables. Determine the machining path planning of adaptive milling tool. The tool path is changed from the longitudinal reciprocating mode to the longitudinal single mode, and from the original forward and reverse milling alternate milling to all the forward milling mode, which improves the cutting force of the tool during processing, and improves the processing efficiency and surface quality. The invention has the advantages of significant economic benefits, increased milling efficiency by more than 20%, qualified wall thickness, and improved surface quality by one grade. Under the premise of ensuring the processing quality of the parts, the milling processing time can be shortened, the processing efficiency can be improved, and the wall thickness and size requirements can be guaranteed. The processing quality of the parts is stable, and the processing efficiency is obviously improved, and it can be extended to the external milling of other opening casings.

Description

technical field [0001] The invention relates to the field of mechanical manufacturing, and the technical proposal is directly applied to the precision milling and efficiency-enhancing machining of the outer profile of the engine casing of the aero-engine. The surface finish milling of similar parts of military products or civilian products can be applied, and in particular relates to a processing method for self-adaptive milling of the external surface of the case. Background technique [0002] The open case is a typical part of the aero-engine case. It has a complex shape and a thin wall. The rough material is generally made of ring forgings. The materials are difficult-to-machine materials such as titanium alloys and high-temperature alloys. The circumferential state of the parts has been unstable after wire cutting. As a result, all programs cannot be processed according to the same tool length when processing the surface finish milling process. The operator needs to meas...

AI Technical Summary

Problems solved by technology

[0002] The open case is a typical part of the aero-engine case. It has a complex shape and a thin wall. The rough material is generally made of ring forgings. The materials are difficult-to-machine materials such as titanium alloys and high-temperature alloys. The circumferential state of the parts has been unstable after wire cutting. As a result, all programs cannot be processed according to the same tool length when processing the surface finish milling process. The operator needs to measure multiple times in different areas, and adjust the tool length according to the processing status of each area to ensure the wall thickness of the part and the size of the tool. The tool is connected to the surface, the processing efficiency is low, and the surface quality of the part cannot be guaranteed

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