单颗磨粒铰珩毛刺截面的仿真与验证

Simulation and verification of burr sectional area during single-grit abrasive reaming

通过建立单颗磨粒微切削模型,分析了铰珩毛刺的形成过程。以侧边毛刺截面积为毛刺评价指标,研究了切削深度、切削宽度和刃倾角对毛刺形成的影响规律,并通过试验验证模型的准确性。分析结果显示:工件材料的塑性变形是影响毛刺形成的主要因素,塑性变形量越大,毛刺截面积越大;切削深度、切削宽度增加,毛刺截面积明显增大;刃倾角由负值向正值变化时,由于材料塑性变形量和流动方向的变化,毛刺尺寸逐渐增大。

A single-grit micro-cutting model is established and the burr formation process during abrasive reaming is analyzed.Side burr sectional area is taken as the evaluation index of burr size.The influences of cutting depth,cutting width and cutting edge inclination angle on burr formation are studied.The accuracy of the model is verified by experiments.The results show that plastic deformation is the important factor affecting burr formation.With larger plastic deformation,the burr sectional area is larger.Side burr sectional area increases with the raise of cutting depth and cutting width.With the change of cutting edge inclination angle from negative to positive,the amount of plastic deformation increases and the direction of material flow changes,and then the burr size grows.