STEP-NC译码器及其关键技术

为实现与产品模型数据交换标准兼容的数控数据接口在数控系统中的应用,开发了STEP-NC译码器.阐述了译码器的工作原理,将译码器按照逻辑关系分为六个功能模块,介绍了各个模块的功能和实现方法.详细论述了STEP-NC译码器实现中的三项关键技术:类库设计、刀轨规划参数读取方法和STEP-NC坐标系转换.最后,结合一个STEP-NC程序实例,利用所开发的STEP-NC译码器,规划出该程序实例的完整刀具轨迹,通过STEP-NC铣削仿真系统对刀具轨迹及零件模型进行切削仿真.仿真结果表明,所开发的STEP-NC译码器是正确可行的.

STEP-NC code translator and its key technologies

To realize application of the STandard for the Exchange of Product model data -compliant Numerical Control data interface(STEP-NC) in NC system,an STEPNC code translator was developed.Firstly,working principles of the STEP-NC code translator was introduced.According to inner logical relationship,the code translator was composed of six functional modules.Function and realizing method for each module was expatiated.Three key technologies of the STEP-NC code translator including design of class library,reading method of parameters in toolpath planning and transition of STEP-NC coordinate system were discussed in detail.Finally,combined with a STEP-NC program example,the whole toolpath of the program was planned by the proposed STEP-NC code translator.A cutting simulation was conducted to the toolpath and the workpiece model by STEP-NC milling machining simulation system.Result demonstrated feasibility of the developed STEP-NC code translator.