Machining method for self-adaptive milling of outer profile of split casing

Abstract

The invention relates to a machining method for self-adaptive milling of an outer profile of a split casing. The machining method comprises the steps of: determining a self-adaptive milling track planof the outer profile of the split casing, determining an online measurement track plan of the outer profile of the split casing, and generating a machining program with a self-adaptive milling compensation variable through adopting a software post-processing method; and determining a self-adaptive milling cutter machining path plan. According to the machining method, a longitudinal reciprocatingmode of a tool path is changed into a longitudinal single mode, an original forward and reverse milling alternate milling mode is changed into a complete forward milling mode, the cutting stress condition of a tool in the machining process is improved, and the machining efficiency and the surface quality are improved. The machining method has the advantages that the economic benefit is remarkable,the milling efficiency is improved by 20% or above, the wall thickness size is qualified, and the surface quality is improved by one grade. On the premise that the part machining quality is guaranteed, the milling time can be shortened, the machining efficiency is improved, and the wall thickness size requirement is met; and the part machining quality is stable, the machining efficiency is obviously improved, and the machining method can be expanded to be used for milling outer profiles of other split 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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