钼钒铸铁汽车覆盖件模具数控高效切削加工稳定性研究

针对汽车覆盖件模具型面特点,进行了球头铣刀高效加工自由曲面铣削方式与切削层参数的研究,获得了被加工曲面曲率和铣削参数对切削层参数的影响规律,提出了控制模具型面切削过程稳定性的方法。结果表明:在汽车覆盖件模具型面粗加工阶段通过选择合理的刀路使被加工表面的曲率连续变化,有助于控制切削过程的稳定性,而在半精加工和精加工阶段通过减小行距能够降低切削层参数的变化幅度,获得较高的模具加工质量。

Study on Stability of High-efficiency Machining for Machining Mo-V Cast-iron Cover of Automobile Moulds

Based on the characteristics of cover of automobile moulds,this paper studied the influence rule of parameters of cutting layer when mould surface is machined by ball-end milling cutter.The results indicated that the varieties of curvature and cutting parameters can influence parameters of cutting layer,this principle was obtained and the method of controlling cutting process stably was presented.Reasonable cutting path can make the curvature of machined surface change contiously when roughing,which can keep cutting process stably.Shorten path interval can improve the quality of moulds when half-fishing or fishing.Maching practice proved that this method is feasible.