AVIC Shenyang Liming Aero Engine (Group) Co., Ltd. Yang Jinfa
Efficient machining of aero-engine requires the establishment of a comprehensive evaluation system for the machining process of aero-engine hard-to-machine materials. The cutting performance is evaluated from the tool angle, and the machinability of the workpiece is evaluated from the point of view of the part to achieve a reasonable match between the workpiece and the tool. The machining process of aero-engine hard-to-machine materials should be optimized in stages: roughing is the goal of machining efficiency, and finishing is aimed at the surface integrity and machining efficiency of the parts, and simulation analysis is carried out. The processing techniques of car, milling, drilling and boring of representative high-strength structural steel, stainless steel, powder superalloy, titanium alloy and other materials under different heat treatment conditions should be studied. According to different workpiece materials, machining characteristics, tool materials, tool structure and geometric parameters, the design selects reasonable factors, conducts cutting tests, optimizes different high-efficiency cutting parameters, and establishes a practical cutting database.
1. Use high-performance machine tools
At present, the equipment used in aero-engine machining is mainly based on high-performance CNC machine tools. The demand for multi-axis linkage and composite CNC machining is increasing: machining simulation is moving from motion simulation to physical simulation. The combination of high-performance CNC equipment and processing technology and cutting database is an effective way to achieve efficient processing. The structure of the aero-engine parts is complex, and the machine tool needs to be highly flexible and versatile. It can adapt to the processing of various types of parts, as well as multi-process composite processing and automatic processing to meet the requirements of efficient machining of aero-engine parts (see Figure 1).
Figure 1 Cutting, grooving, profiling turning applications
In the selection of tools, it is necessary to consider the typical tool materials and tools, as well as the new tool materials and the latest design tools, focusing on the cutting performance of new tool materials and new tools, and improve the efficiency of cutting processing. In the cutting process, the test data is processed, and the tool selection, tool parameters and cutting data are collected and written into the database. High-performance tools (see Figure 2), such as the new grooving tool, can replace a significant portion of ISO standard turning tools. It has a remarkable effect on the surface processing of complex parts. The superior products recommended by each tool manufacturer are also concentrated on such tools.
Figure 2 High performance tool
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