硬质合金涂层刀片铣削AISI410不锈钢刀具寿命研究

AISI410不锈钢广泛应用于各种工业设备的制造,如汽轮机叶片,各种泵的机械零件和蒸汽设备等。加工过程中存在着导热率低、加工硬化严重、切削力大等问题,属于典型的难加工材料。本文通过硬质合金涂层刀片铣削AISI410不锈钢正交试验,研究了硬质合金涂层刀片铣削AISI410不锈钢时刀具寿命的变化规律,归纳了相应的刀具寿命模型,并对其中的各影响因素的独立作用效果进行了分析。试验结果表明:硬质合金涂层刀片加工AISI410不锈钢时,铣削方式、每齿进给量、切削速度、轴向切削深度对刀具寿命的影响依次减小;切削速度越低,每齿进给量对于刀具寿命的影响越大;切削效率一定时,降低切削速度增大每齿进给量有利于延长刀具寿命。

Research on Tool Life of Coated Cemented Carbide Inserts for Milling AISI410 Stainless Steel

AISI410 stainless steel is widely applied in the manufacture of many kinds of commercial units,such as steam turbine blades,mechanical parts of pump and steam generating installations,etc.In the processing there are many problems including low thermal conductivity,serious work hardening and big cutting force.AISI410 stainless steel belongs to the typical difficult-to-machine material.A series of orthogonal steel tests about milling AISI410 stainless with coated cemented carbide inserts were carried out.The regularity of the tool life based on the orthogonal milling experiment was investigated,the tool life model was proposed,and the independent effect of each factor of the model was analyzed.The results show that the influences on the tool life of milling method,feed per tooth,cutting speed and cutting depth for milling AISI410 stainless steel reduce in turn.The influence of feed per tooth on tool life increases with the lowering of cutting speed.In the constant cutting efficiency condition,lowering cutting speed and increasing the amount of feed per tooth are the better selection for a longer tool life.