沟槽型表面微织构麻花钻的钻削性能仿真

2018-07-16

作者：邓大松，郭旭红，张克栋单位：苏州大学

摘要：刀具表面置入微织构能够有效提高刀具切削性能和减小刀具磨损。针对麻花钻磨损严重问题，在麻花钻的前刀面刀—屑接触区域设计沟槽型表面微织构，利用Deform3D软件建立表面微织构麻花钻钻削45钢的三维仿真模型，并研究沟槽宽度和间距对表面微织构麻花钻的钻削性能影响和作用机理。仿真结果表明：表面微织构的置入能够有效降低钻削力和减少钻头磨损，并改善麻花钻前刀面的最大温度分布，避免了最大温度的集中；当沟槽宽度增加时，钻削力呈先减小后增加的趋势；当微织构沟槽间距减小时，刀—屑接触区域内起作用的微织构数量增多，钻削力、钻削温度和钻头磨损呈减小趋势。

关键词：表面微织构；麻花钻；沟槽参数；有限元仿真；钻削性能

中图分类号：TH117；TG713+1；TG501.1；TP391.9文献标志码：A

Finite Element Simulation on Drilling Performance of Surface Groove MicroTextured Twist Drill

Deng Dasong，Guo Xuhong，Zhang Kedong

Abstract:The microtextured surface is an effective measure to improve the tool cutting performance and reduce the tool wear.In view of the serious wear of the twist drill，the microtextured grooves in the rake faces of twist drills are fabricated.Through Deform3D software，the finite element simulation model of drilling 45 steel is established，and the influences of different groove widths and gaps between grooves on cutting performances and their mechanisms are investigated.The results show that the surface microtexture can effectively reduce the drilling force and tool wear，and improve the maximum temperature distribution.The drilling force decreases and then increases with the increase of the groove width，and the drilling force，temperature and tool wear tend to decrease with the groove gap decreasing.

Keywords:surface microtexture；twist drill；groove parameter；finite element simulation；drilling performance