钎焊金刚石薄壁钻钻磨氮化硅陶瓷的磨损研究

Research on Wear of Brazed Diamond Thin-wall Drill in Drill-grinding Silicon Nitride Ceramics

采用钎焊金刚石薄壁钻进行钻磨氮化硅陶瓷的试验,研究了金刚石粒度、壁厚、主轴转速和钻压对钻头寿命的影响。同时,研究了钎焊金刚石薄壁钻的磨损形态,包括金刚石磨粒磨损和粘结剂磨损。结果表明,钻头寿命随金刚石粒度和壁厚的增大而减小,随主轴转速和钻压的增大而先增大后减小;金刚石磨粒的磨损形态包括磨粒磨平、破碎及脱落,且以磨平为主,脱落较少;粘结剂磨损主要包括粘结剂断裂与流沙形态磨损。

With the brazed diamond thin-wall drill, the silicon nitride ceramics is drill-grinded. The influences of diamond size, wall thickness of drill, spindle speed and drilling pressure on drill life are studied. Meanwhile, the wear forms of the brazed diamond thin-wall drill are studied, which mainly include diamond grit wear and bond wear. The results show that drill life decreases with the rise of diamond size and wall thickness, increases first and then decreases with the growth of spindle speed and drilling pressure. Diamond grit wear forms mainly include wearing flat, fragmentation and dislodgment, taking wearing flat as the main ,few grit dislodging. Bond wear forms mainly include bend fracture and shifting sand form.