关键词: 数控铣削, 弯管内表面, 五轴联动加工, 加工干涉

Abstract:

Based on the principles of 5-axis machining,a method was introduced,which avoided processing interference and improved the cutting condition on the internal surfaces of bent pipe.Experimental process planning,machining zoning,and CNC programming were carried out.A sample piece was worked out in the 4-axis and 5-axis machining process using a ball-end miller and the posture of the tool was adjusted.Meanwhile,the angle between the miller and workpiece was nearly constant.The results show that the ball-end miller avoids both partial and whole interferences,and the cutting status keeps stable.The final surface quality has a good uniformity and satisfies the technical request (Ra=3.2μm).The research provides a machining technology of main pipe internal surfaces for nuclear power station and similar type of bent pipes in theory and application.

Key words: CNC milling, internal surface of bent pipe, 5-axis machining, interference