啄钻钛合金试验研究

Experimental Study on Peck Drilling Titanium Alloy

【目的】解决钻头通常在半封闭状态下切削,使得刀具与工件之间存在摩擦严重、切削温度高、排屑困难的问题,扩展钛合金的应用范围。【方法】课题组对钛合金(TC4)进行了小孔钻削试验,研究不同钻削参数下钻削轴向力的变化规律。通过设计正交试验研究不同钻头半径、主轴转速、进给量对钻削轴向力的影响,根据极差分析与方差分析,确定各因素对钻削轴向力影响的主次顺序及显著性。【结果】1)钻削轴向力随着钻头半径和进给量的增加而增加,随着主轴转速的增加而减小。2)钻头半径、主轴转速、进给量的极差分别为365.00、73.00、209.34,钻头半径﹥进给量﹥主轴转速。3)钻削轴向力的多元线性回归模型的F=10.2000,大于F_(0.005)(3,5)。【结论】1)钻头半径和进给量对钻削轴向力的影响为高度显著,主轴转速的影响为显著。2)钻头半径对钻削轴向力的影响最大,进给量次之,主轴转速最小。3)钛合金钻削轴向力多元回归预测方程具有显著性。

[Objective]To solve the problems of severe friction,high cutting temperature,and difficulty in chip removal between the cutting tool and the workpiece when the drill bit is usually cut in a semi closed state,and to expand the application range of titanium alloys.[Method]The research group conducted small hole drilling experiments on titanium alloy(TC4)to study the changes in axial force during drilling under different drilling parameters.By designing orthogonal experiments,the effects of different drill bit radii,spindle speeds,and feed rates on drilling axial force were studied.Based on range analysis and variance analysis,the primary and secondary order and significance of the effects of each factor on drilling axial force were determined.[Result]1)The axial force of drilling increases with the increase of drill radius and feed rate,but decreases with the increase of spindle speed.2)The range of drill radius,spindle speed,and feed rate is 365.00,73.00,and 209.34 respectively,with drill radius>feed rate>spindle speed.3)The multiple linear regression model for drilling axial force has F=10.2000,which is greater than F_(0.005)(3,5).[Conclusion]1)The influence of drill bit radius and feed rate on drilling axial force is highly significant,while the influence of spindle speed is significant.2)The radius of the drill bit has the greatest impact on the axial force of drilling,followed by the feed rate,and the spindle speed has the smallest impact.3)The multiple regression prediction equation for axial force in titanium alloy drilling is significant.