Lathe machining method for end face deep narrow groove in aerial engine crankcase

Abstract

The invention provides a lathe machining method for an end face deep narrow groove in an aerial engine crankcase. The method comprises the following machining steps: 1, using a groove cutter to carry out the first machining step to form a transition end face deep narrow groove, wherein the width of a blade of the groove cutter is less than that of the end face deep narrow groove to be machined, and at least two opposite groove walls of the transition end face deep narrow groove have machining allowances; 2, removing the machining allowances of the transition end face deep narrow groove to form the actually machined end face deep narrow groove. According to the lathe machining method, the machined end face deep narrow groove is higher in machining precision.

Description

technical field [0001] The invention relates to the technical field of aero-engine casing processing, in particular to a method for turning deep and narrow grooves on an end face of an aero-engine casing. Background technique [0002] At present, titanium alloy casings and superalloy casings in aero-engines are used in compressor parts and turbine parts respectively, such as figure 1 As shown, there is an annular precision narrow groove structure formed by turning on the casing, which is used to install the stator guide vane to guide the deep narrow groove 1 on the end surface of the airflow. The processing process of the above-mentioned deep and narrow groove 1 on the end face is mainly to use a groove cutter with the same blade width as the expected width of the deep and narrow groove on the end face, and perform one feed to form the deep and narrow groove 1 on the end face. Big, difficult chip removal, easy to hit the knife problem, such as figure 2 As shown, the actua...

AI Technical Summary

Problems solved by technology

The processing process of the above-mentioned deep and narrow groove 1 on the end face is mainly to use a groove cutter with the same blade width as the expected width of the deep and narrow groove on the end face, and perform one feed to form the deep and narrow groove 1 on the end face. Big, difficult chip removal, easy to hit the knife problem, such as figure 2 As shown, the actual deep and narrow groove 3 on the end face processed by the groove cutter 2 (the solid line area in the figure) is different from the expected deep narrow groove 4 on the end face (the dotted line area in the figure), and the straight line of the groove cutter cannot be guaranteed when grooving Parallel feeding leads to offset, and it is difficult for cutting fluid to enter the cutting area, which is prone to thermal deformation and bending deformation. It is difficult to guarantee the groove width and the size from the groove wall to the center of the casing

The above situations will reduce the machining accuracy of the finished end face deep narrow groove 1

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