面向细长面特征的自动数控编程方法研究

Research on automatic NC programming method for slender plane features

为提高细长面特征数控编程效率和质量,研究了面向细长面自动数控编程方法。在MBD模型中获取待加工特征的工艺信息并生成特征图像;从特征图像中提取和优化了加工参考轨迹;将优化后的参考轨迹线投影至原特征面并以此自动生成了刀轨和NC代码。最后,在NX平台开发出基于该方法的原型系统并以某船用柴油机关键件作为测试对象进行测试。测试结果表明,该方法可实现细长面特征数控程序的自动生成,可有效减少人机频繁交互;相较于传统编程,该方法生成的NC代码平均减少了近65%的加工时间。

In order to improve the efficiency and quality of NC programming efficiency and quality for slender planes,an automatic NC programming method was studied.The process information of slender plane feature was obtained in the MBD model and the feature image was generated.The machining reference trajectory extracted from the feature image was optimized.The optimized reference trajectory was projected onto the original feature plane in order to generate tool path and NC codes automatically.Finally,the prototype system based on this method was developed on the NX platform and the key parts of a marine diesel engine were used as the tested objects in this system.The results showed that this method realized the automatic generation of NC programming and reduced the frequent human-cam interaction effectively.Moreover,the NC codes generated by this method,compared with traditional programming method,reduced the processing time by nearly 65%on average.