再制造高硬堆焊层切削加工研究

Research on cutting remanufacture hardness deposited materials in the impactive condition

采用高性能硬质合金YG610对洛氏硬度为HRC30和HRC45的两种堆焊层进行切削三要素的正交试验。试验结果表明:两组试验中三要素对加工过程的影响规律基本一致,即进给量、切削速度、切削深度对刀具切削里程的影响幅度依次减小。其中,进给量对刀具切削里程的影响是单调的,随进给量的增大,刀具破损速度急剧增加,最大切削里程降低。切削深度的增加对刀具切削里程的影响相对较小,尤其是高硬材料切削过程中,切削深度的增加对刀具切削性能的影响几乎可以忽略。因此,降低进给量和增加切削深度是冲击材料加工过程中保持刀具切削能力和提高材料去除率的良好方法。

High performance cemented carbide YG610 was adopted for remanufacture hardness deposited materials cutting experiment.And the hardness of deposited materials was HRC30 and HRC45 respectively.The experiment results showed that the same conclusions can be drawn from two group orthogonal experiments for materials above.The influence order on cutting capability of cutting tools was：feed ratecutting speedcutting depth.The cutting length of cutting tools increases monotonously with the feed rate decrease.And the effects by the cutting depth were comparatively small,which is almost negligible in hardness materials cutting.Therefore,low feed rate and large depth of cut are beneficial to keep cutting capability of cutting tools and improve manufacturing productivity.On the basis of the results of two orthogonal experiments and extremum deviation analysis,the best scheme for cutting parameters were achieved after obtaining the best level of the factor by computation.