CVD金刚石厚膜刀具切削参数对切削力及粗糙度影响的研究

为了探究CVD金刚石厚膜刀具切削参数(包括刀具后角、刀尖圆弧半径、切削速度、进给量和切削深度)对切削力和被加工表面粗糙度影响的初步规律,采用单因素方法进行了一系列CVD金刚石厚膜刀具车削仿真和试验研究。结果表明:AdvantEdge有限元仿真软件模拟切削力过程有一定的准确性;在试验参数范围内,随着刀具后角的增大,切削力和表面粗糙度都是先减小后增大,当后角为11°时,切削力和表面粗糙度值最小;随着刀尖圆弧半径的增大,切削力逐渐增大,而表面粗糙度则逐渐减小;随着切削速度的增大,切削力和表面粗糙度都是先增大后减小,当切削速度为90m/min时,切削力和表面粗糙度值最大;随着进给量的增大,切削力和表面粗糙度都显著增大;随着切削深度的增大,切削力和表面粗糙度都逐渐增大,但切削深度对表面粗糙度的影响较小。

Research on the Influence of Cutting Parameters of CVD Diamond Thick Film Tools on Cutting Force and Surface Roughness

In order to investigate the influence of cutting parameters of CVD diamond thick film tools on cutting force and surface roughness,a series of turning simulation and experiments were conducted by the single factor method.The cutting parameters include tool relief angle,tool nose radius,cutting speed,feed and cutting depth.The results show that the simulation of turning force process has certain accuracy by using AdvantEdge FEM software;the cutting force and surface roughness first decrease and then increase with the increase of relief angle.When the relief angle is 11°,the minimum cutting force and surface roughness are obtained.With the increase of tool nose radius,the cutting force increases and surface roughness decrease.With the increase of cutting speed,the cutting force and surface roughness first increase and then decrease.When the cutting speed is 90 m/min,the maximum cutting force and surface roughness are obtained.With the increase of feed,the cutting force and surface roughness both increases significantly.With the increase of cutting depth,the cutting force and surface roughness both increase gradually,but the influence of cutting depth on surface roughness is small.