次摆线走刀在高速铣削窄槽结构中的应用

Application of Trochoidal Tool Path in High Speed Milling Slot

在阐述次摆线参数方程的基础上,基于CAM/HSM技术,将次摆线走刀方式应用于窄槽结构的高速铣削试验中,研究了次摆线走刀的铣削力变化规律、窄槽结构的表面粗糙度及其局部形貌,并建立了次摆线走刀高速铣削窄槽结构的铣削力模型。研究表明:次摆线走刀高速铣削窄槽结构有效可行,加工出了高质量的窄槽型腔表面(Ra=0.142μm);次摆线走刀的铣削力呈周期变化,在走刀平面内,次摆线切削宽度方向上的铣削力是进刀宽度方向上的4倍;采用次摆线走刀加环切走刀策略加工窄槽结构,既改善了窄槽的铣削加工条件,又满足了高速铣削粗精加工的要求和原则。

Trochoidal parametric equation was formulated.Based on CAM/HSM technology,Trochoidal tool path was applied to high speed milling slot experiments.Milling force,surface roughness and local surface morphology were measured,observed and studied comprehensively.An analytical milling force model was defined depending on the study of milling force.The results indicated that trochoidal tool path in high speed milling slot is effective and feasible,and a high-quality slot surface（Ra=0.142 μm） is obtained.The milling force of trochoidal tool path is varied periodically.In the milling plane,the cutting force in trochoidal width direction is quadrupled to the width of trochoidal step ahead.Introduce circumferential cutting tool path to trochoidal peripherally,not only improved the slot of milling condition,but also meet the high speed milling of rough milling and finishing requirement.