PCBN刀具切削高温合金切削力试验分析

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。

Experimental Study on Cutting Force in Turning Superalloy by PCBN Cutting Tool

In recent years, the enormous progress of aeronautical manufacturing has promoted the superalloy industry little by little, especially the rapid development of nickel-based superalloy industry. The hard processing problem of super-alloy material is one of the difficulties of manufacturing. And in the process of cutting, there are some phenomenons, such as large cutting force, high cutting temperature which directly affect the surface quality of workpiece and tool life, and so on. Therefore, the research on measurement and analysis of the cutting force is the effective approach of superalloy cutting processing. This article explores the change rule of cutting force in superalloy cutting by the PCBN cutting tool. Firstly, the material properties and processing characteristics of the superalloy are expounded; Secondly, the single factor and orthogo-nal tests are designed and conducted, which aim to explore the effect and influence rule of the negative chamfer on the cut-ting force, then the cutting force prediction model of turning superalloy GH4169 by PCBN cutting tool is established and investigated; Finally, the model optimization is finished and compared with experimental data. The above efforts provide certain reference for superalloy technological parameter optimization.