磨削余量对麻花钻后角和横刃斜角的影响  

Impacts of Grinding Allowance on Relief Angle and Chisel Edge Angle of Twist Drills

作　　者：戴俊平[1] 关文魁[2] 郭辉[2] 

机构地区：[1]陕西理工学院机械工程学院 [2]陕西理工学院

出　　处：《工具技术》2011年第6期64-66,共3页Tool Engineering

摘　　要：基于锥面刃磨法的刃磨理论大多假设,麻花钻刃磨前后主切削刃在砂轮上的位置保持不变,忽略了磨削余量对刃磨参数的影响。而在实际加工中,即使刃磨参数选择合理,重刃磨的麻花钻后角和横刃斜角均可能不在优化加工参数范围之内。本文给出了考虑磨削余量的锥面方程,推导出后角和横刃斜角的计算公式,分析了磨削余量对后角和横刃斜角的影响,发现磨削余量是导致后角和横刃斜角偏大的主要原因。Most of based-cone-grinding-method grinding theories supposed that before and after grinding, the position of main cutting edge on twist drill is unchanged, and the impacts of grinding allowarice on grinding parameters are neglected. But in the actual machining process, even if grinding parameters are selected reasonably, the both relief angle and chisel edge angle can be beyond the scope of optimal cutting parameter. In this paper, the cone surface equation taking into account the grinding admittance was presented, the calculation formulas of relief angle and chisel edge angle were deduced, and the impacts of grinding allowance on relief angle and chisel edge angle were analyzed. It is found that the grinding allowance is the main reason lead to oversized relief angle and chisel edge angle.

关 键 词：麻花钻 锥面刃磨法 磨削余量 后角 横刃斜角 

分 类 号：TG580.12[金属学及工艺—金属切削加工及机床] TG713.1