超高强度钢30Cr3SiNiMoVA高速铣削加工性能分析

2018-07-16

作者：沈毅1，宋健1，昝林2，郭国强1，黄文斌1，胡蒙3，明伟伟3，陈明3 单位：1上海航天精密机械研究所；2上海航天技术研究院；3上海交通大学

摘要：作为航空航天工业中广泛使用的低合金超高强度钢，30Cr3SiNiMoVA具有优异的综合性能，但材料的切削加工性能差，是一种典型的难加工材料。为了解决传统磨削加工表面硬化和效率低下等问题，采用高速硬铣削来实现超高强度钢的精切代磨。为此，本文对热处理后的超高强度钢开展了高速铣削加工试验，对不同试验参数下的切削力、切削振动和加工表面质量结果以及变化规律进行了分析，同时还分析了切屑的形态转变趋势。试验结果表明，随着切削速度和径向切宽的增加，径向切削力有所增大，同时切削速度和径向切宽对切削振动的影响也最明显。通过合理选择切削参数，高速铣削加工超高强度钢能够获得较好的加工表面质量。

关键词：超高强度钢；高速铣削；切削力；切削振动

中图分类号：TG543；TH161；TH142.2文献标志码：A

Analysis on High Speed Milling Performance of UltraHigh Strength Steel 30Cr3SiNiMoVA

Shen Yi，Song Jian，Zan Lin，Guo Guoqiang，Huang Wenbin，Hu Meng，Ming Weiwei，Chen Ming

Abstract:As a kind of low alloy high strength steel，which is widely used in aerospace industry，30Cr3SiNiMoVA has excellent comprehensive performance，but it is a kind of typical difficulttomachine material.In order to solve the problems of surface hardening and low efficiency of the traditional grinding，high speed milling is used to machine the ultrahigh strength steel.In this paper，the high speed milling experiments for heattreated high strength steel are carried out to analyze the variation of cutting force，cutting vibration and surface roughness under different experimental parameters.The results show that the radial cutting force increases with the increase of radial cutting width and cutting speed，which have the biggest influence on cutting vibration.By choosing cutting parameters reasonably，better machining surface quality can be obtained by high speed milling.

Keywords:ultrahigh strength steel；high speed milling；cutting force；cutting vibration