摘要
农机发动机曲轴属于复杂零部件,在加工时需要采用数控加工方法。数控机床加工时首先要进行编程,而曲轴形状比较复杂,在编程之前要对零件的曲面形状进行分析,然后通过插补技术得到驱动电机的控制点。为此,引入了Pro/E建模软件对曲面进行建模,采用NURBS曲线插补技术对零部件的曲面形状进行拟合,然后利用UG软件对加工轨迹进行仿真,进而对加工过程的切削参数进行优化。为了验证方案的可行性,对发动机曲轴零部件进行了建模和刀具轨迹仿真,结果表明:该方案可以成功实现曲轴零部件加工的刀具轨迹仿真。最后,对两种不同的插补算法产生的加工误差进行了比较,进一步验证了NURBS曲线插补算法的可靠性。
Crankshaft of agricultural engine belongs to complex parts,which need to be processed by numerical control method.When CNC machine tool is processed,it must be programmed first,and the shape of crankshaft is more complex.Before programming,the surface shape of parts should be analyzed,and then the control points of driving motor can be obtained by interpolation technology.The surface is modeled by Pro/E software,and the surface shape of parts is fitted by NURBS curve interpolation technology.Then the machining trajectory is simulated by UG software,and the cutting parameters are optimized.In order to verify the feasibility of the scheme,the engine crankshaft parts are modeled and the tool path simulation is carried out.The simulation results show that the scheme can successfully realize the tool path simulation of crankshaft parts processing.Finally,compared the machining errors caused by two different interpolation algorithms,NURBS is further verified for reliability of curve interpolation algorithm.
作者
于翔
Yu Xiang(Department of Equipment Manufacturing,Chengdu Vocational&Technical College of Industry,Chengdu 610218,China)
出处
《农机化研究》
北大核心
2020年第5期46-50,共5页
Journal of Agricultural Mechanization Research
基金
四川省教育厅自然科学项目一般课题(18ZB0357)
