基于VERICUT的数控成形磨齿加工仿真

Machining Simulation of NC Gear Profile Grinding Based on VERICUT

在数控机床研发阶段引入加工仿真可以检验机床的结构设计,验证数控加工程序,缩短开发周期。通过分析一种数控成形磨齿机床的结构和运动,基于齿轮啮合原理推导了砂轮与螺旋面之间的接触线方程,建立了计算砂轮廓形和机床运动参数的数学模型。基于VER ICUT软件平台,建立了精确的砂轮修整和磨齿加工仿真模型,并设计了完整的加工仿真流程。在此基础上,针对一个渐开线斜齿轮,实现了砂轮修整和磨齿的加工仿真。结果表明这种数控成形磨齿机床能够满足功能要求,结构设计是合理的。比较了仿真结果与理论模型之间的误差,证明数控加工程序和加工仿真模型是正确的,并且精度都很高。

In developing CNC machine tools machining simulation could examine the structure design of machine tools,verify the NC programs and reduce development cycle.By analyzing the structure and motions of one type of NC gear profile grinding machine tool,equations of the contact line between grinding wheel and the helicoid were proposed based on the theory of gear engagement.The mathematical model for calculating wheel profile and motion parameters of machine tool were also created.We built machining simulation models for wheel dressing and gear grinding with VERICUT,and designed a complete machining simulation procedure.Furthermore,the machining simulations of wheel dressing and gear grinding for an involute helical gear were carried out.The results indicate that this kind of CNC gear profile grinding machine meets functional requirements,and the structure design is reasonable.The profile error between simulation results and the theoretical models were calculated.It proves that NC programs and the machining simulation models are all correct and of high precision.