关键词: 多模胎, 复合加工工艺, Petri网, 数控弯管, 加工仿真

Abstract: To address the problems such as singleness of die,feeding type or bending process in current NC tube bending process simulation systems,the simulation method for multiple die and composite geometry machining process was presented.In this method,Petri net model of NC tube bending process was established,NC file was divided into three information module,the initial identification of Petri net was determined,and nine kinds of die's model were established,On this basis,the tube's dynamic forming process in the process of single die or multiple die,bending type of rotating or push and left or right direction was analyzed.The NC bending process was simulated based on Petri net,which realized composite process simulation such as single die or multiple die,feeding type of straight forward or back and forth,bending type of rotating or push,left or right direction.The software system developed by this method was used as the supporting software for the production of a certain company,and the engineering application had been obtained in the enterprise to prove the validity and reliability of the method.

Key words: multiple die machining simulation, composite machining process, Petri nets, NC tube bending, sheet metal forming