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近些年来,航空制造业的巨大进步推动了高温合金,特别是镍基高温合金的高速发展。高温合金材料的难加工问题是目前制造业的难点,其在切削过程中存在切削力大、切削温度高等现象,直接影响到工件加工表面质量和刀具使用寿命等,因此对切削力进行测量和分析是研究高温合金切削加工的有效途径。探究PCBN刀具切削高温合金切削力变化规律,首先阐述高温合金的材料特性及加工特点;其次设计并进行单因素和正交试验,探讨负倒棱对切削力的作用和影响规律,建立切削高温合金切削力预测模型;最后实现预测模型的优化,并与试验数据对比验证,为高温合金工艺参数优化起到参考和借鉴作用。
In recent years, the great progress of aviation manufacturing has promoted the rapid development of superalloys, especially nickel-base superalloys. The difficult processing of high-temperature alloy materials is the current manufacturing difficulties, the cutting process in the presence of cutting force, cutting temperature is high, directly affect the quality of the workpiece surface and tool life, and so on the cutting force measurement and analysis It is an effective way to study superalloy cutting. In this paper, the variation of cutting force of PCBN cutting tool superalloy was probed. Firstly, the material properties and processing characteristics of superalloy were described. Then the single factor and orthogonal test were designed and the effects of negative chamfer on cutting force were discussed. Cutting force prediction model. Finally, the optimization of the prediction model is achieved and compared with the experimental data to verify that it can be used as a reference for the process parameters optimization of the superalloy.