数控加工的数学处理——基点计算

Mathematical Treatment of NC—Basic Points' Coordinates Calculation

根据零件图样的要求,按照已确定的加工路线和允许的编程误差,计算出数控系统所需输入的数据,是编制数控加工程序的重要环节。在完成了工艺分析和确定了加工路线后,最关键的就是零件轮廓的基点计算。文中阐述了由直线和圆弧组成的零件轮廓基点计算的有效方法,并以典型实例介绍了代数法和几何法在基点计算中的应用。

According to the requirements of part design,the established processing routes and the programming allowance error,this paper firstly calculates out the required input data for numerical control system and programs NC processing.After completion of the process analysis,it defines the process line,calculates the basic points＇ coordinates of parts profile.It also expounds effective methods of basic points＇ coordinates calculation and uses the typical example to illustrate the algebra and geometry in basic points＇ coordinates calculation.