数控铣削中圆弧轮廓和直线轮廓表面不一致成因研究——以SINNUMERIK系统为例

Research on the Cause of the Surface Inconsistent of Arc Contour and Straight Line Contour in the Numerical Control Milling Process——Taking SINNUMERIK System As An Example

在数控铣削轮廓加工中,会出现圆形轮廓和直线轮廓处表面粗糙度等级不一致的现象.通过分析发现:造成这种现象的原因是程序编制员将圆加工轮廓的进给量和直线进给量设成同样值,所以在切削过程中会出现单位时间内走刀量不同,导致表面粗糙度不一致.通过SINNUMERIK802S/802C和SINNUMERIK802D系统对内、外圆轮廓加工进给量进行修调,从而使铣削加工圆形轮廓和直线轮廓处表面粗糙度协调一致,保证了零件表面的质量.

In the numerical control milling process, there is a phenomenon that the surface roughness is not uniform in the shape of arc contour and straight line contour. Through the analysis, it is found that the cause of this phenomenon is that the feed quantity of arc contour and straight line contour was set to the same value by programmer. Therefore, the knife moving distance in unit time will be different in the cutting process and lead the surface roughness to be inconsistent. By adjusting the feed quantity of the inner and outer circle contour in SINNUMERIK802S/802C and SINNUMERIK802D system, it is ensured that the surface roughness of arc contour and straight line contour is the same in the milling process, and the quality of the parts is ensured.