可转位圆形铣刀片定位稳定性研究

Study on Positioning Stability of Indexable Circular Milling Insert

在加工过程中,保证圆形铣刀片定位的稳定性非常重要。由于圆形铣刀片定位结构及切削过程中的切削力是影响刀片定位稳定性的主要因素,因此本文主要针对可转位圆形铣刀片铣削加工不锈钢时的夹固稳定性进行研究,分析无限位结构圆形铣刀片在不同切削工况下刀片夹固稳定性,并对提出的两种优化方案进行试验验证。研究结果表明:在大切削深度或大进给参数条件下,无限位结构设计的圆形铣刀片会发生旋转,且转动幅度随切削时间的延长而增大;优化后的限位结构可有效阻止刀片转动,且底部八边形斜面限位结构较底部凹槽限位结构防转性能显著。

It is very important to ensure the positioning stability of circular milling insert in the machining process.The positioning structure of circular milling insert and the cutting force in the cutting process are the main factors affecting the positioning stability of the insert.The clamping stability of indexable circular milling insert when milling stainless steel is studied, and the clamping stability of circular milling insert with infinite structure under different cutting conditions is analyzed, and two optimization schemes for experimental verification are put forward.The results show that the circular milling insert with infinite structure will rotate under large cutting depth or large feed parameters, and the rotation amplitude increases with the extension of cutting time.The optimized limit structure can effectively prevent the blade from rotating, and the anti-rotation performance of the bottom octagonal inclined limit structure is better than that of the bottom groove limit structure.