面向加工特征的刀具和切削参数计算机辅助选择系统

切削刀具制造商面临围绕大量工件材料和加工特征为客户提供合理刀具和切削参数的现状,切削工艺规划的核心步骤也是刀具和切削参数的确定。确定刀具和切削参数一般多从零件材料角度出发,可能导致工件与刀具不匹配。文中提出面向加工特征的刀具和切削参数计算机辅助选择系统的开发。系统包括车削特征、铣削特征、钻削和镗削加工特征,系统利用特征图形作为用户交互式接口,采用关系数据库结合数据驱动和规则推理逻辑来选择刀具和切削参数,利用数学模型计算过程参数包括单工步加工工时、切削功率、最大粗糙度等,并辅助制定工序。以车刀和车削参数选择为例,介绍该系统的实现方法。该系统可以辅助设计师及工艺人员选择合理的刀具和切削参数。

Computer-aided Selection System for Cutting Tools and Parameters Based on Machining Features

Cutting tool manufacturers are facing increasing demands to supply a comprehensive advice service with relation to selection of appropriate tools and cutting parameters for a widely variety of part materials and machining features.The central element for process planning is to select the appropriate cutting tools and machining parameters,too.However,the main attention has been only paid on the part materials.It causes the mismatches between workpieces and tools.This study is to describe the development of a computer-aided selection system for cutting tools and cutting parameters based on machining features（FTCPS）,which is designed to cover different component shapes including turning,milling,drilling as well as boring operation features.The kinematic link between machined surface feature with a simple icon based interface being used to input data records,and a relational database combined with data-driven method and rule-based decision logic is used to select cutting tool geometry and machining parameters for a range of machining operations.The system also utilizes mathematical model to calculate processing conditions（machining time in single path,cutting power,maximum harshness,etc.）.Process planning is completed in the end.By turning tools and turning parameters selection for example,the result shows the realization method of system.FTCPS will help the designers and manufacturing planners to select optimal set of cutting tools and cutting conditions.