MP槽型与传统槽型的正交切削试验对比研究

Comparison of Orthogonal Cutting Test Study of a New Type of MP with Traditional Groove

选用经典的YT15刀片的F型断屑槽与新型刀片MC6025的新型槽型MP,利用正交试验法断续干式车削45钢,通过三向测力仪测定了相同切削用量下两种槽型刀片的切削力。采用回归分析法推导出切削力与切削速度、背吃刀量、进给量的关系表达式,并获得两种槽型刀片对切削力的影响规律。对比分析了新槽型与传统槽型对切削性能影响的差异以及新槽型的优缺点,并通过极差分析得出切削用量对新槽型的影响程度及最优切削方案。同时,试验结果得到了新槽型MP的最适切削参数。分析结果表明:切削三要素对切削力影响的一般性结论对不同槽型刀片,尤其是新型刀片同样成立;本试验范围内,新槽型MP的最适切削参数为:ap=1.0mm,f=0.1mm/r,v=50.3m/min;新槽型比传统槽型的断屑范围更大。

Two types of chip breaking groove （F／MP） of two kinds of the indexable inserts （YT15／MC6025） are used in the test of interrupted dry-cutting for 45 steel by means of orthogonal experiment. The turning forces of different grooves under the same cutting parameters can be measured by dynamometer. A formula of cutting force and cutting speed, cutting depth, feed rate can be obtained through the regression analysis method, and the experiment can also get the effects of different groove type inserts for turning forces which are further verified by range analysis method. At the same time, the results have got the optimal cutting parameters of MP type groove. Analysis results show that general conclusion of the effect that three factors of cutting on turning force is also formed on different groove inserts, even the new groove; In this study：the most appropriate cutting parameters for new insert MC6025-MP are： ap =1. 0mm, f=0. 1mm/r, v=50. 3m/min. Chip breaking range of new type of groove is greater than the traditional.