Double main shaft turning-milling combined machining method for aeroengine case

Abstract

The invention provides a double main shaft turning-milling combined machining method for an aeroengine case. The method comprises the following steps: dividing 16 machining regions according to a geometric structure of the case, selecting a double main shaft turning-milling combined machining machine tool, determining cutter type and size, machining process parameters and a tool path mode, planning a tool path for double main shaft simultaneous machining of an inner cavity and an outer wall of the case by utilizing UG software and a Post Builder provided by the software, and converting the tool path into a numerical control instruction used for seven-coordinate five-linkage double main shaft simultaneous machining and capable of being executed by a Huazhong numeral control system HNC-848. The method can finish turning-milling combined cutting and vertical and horizontal double main shaft simultaneous machining of the complex case by one-time clamping and positioning, improves the machining efficiency, effectively controls machining deformation, and provides a total solution for numerical control machining of the aeroengine case in China.

Description

technical field [0001] The invention relates to the field of numerical control machining, in particular to a dual-spindle turning-milling composite machining method for an aero-engine case. Background technique [0002] The engine casing is the base of the entire engine. Its interior is the main shaft and blades, and the external components are connected, including oil pipes, cooling pipes and control systems. The casing parts have complex shapes and special materials. The material removal rate is very high, which makes the turning and milling process of the casing extremely complicated. At present, the inner and outer surfaces of the casing, the front and rear mounting edges, and the annular groove are generally rough-turned and semi-finished in sequence with a vertical CNC lathe. Turning and finishing machining, and then use a three-axis CNC milling machine to rough mill the inner and outer profiles of the casing and drill, expand, and ream the mounting hole edges and radi...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a dual-spindle turning-milling composite machining method for an aero-engine casing in view of the problems of complex processing technology, low processing efficiency, and large processing deformation of the existing overall casing: the method follows the processing principle of concentrated procedures, adopts The seven-coordinate five-linkage dual-spindle turning-milling compound processing machine tool realizes turning-milling compound cutting, and the vertical and horizontal dual-spindles process the inner and outer profiles of the engine casing at the same time. Completed on a machine tool, providing an overall solution for the processing of domestic aero-engine casing parts

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