DCC在航空发动机工艺尺寸链计算中的应用

Application of DCC in Process Dimension Chain Calculation of Aeroengine

在航空发动机零件加工过程中,为了减小由于加工、设计和测量基准不统一而导致的误差累积和加工工序中形位公差的综合影响,从工艺尺寸链计算的难点闭环的判断和形位公差的处理分析入手,总结闭环判断的原则和判断技巧,应用尺寸链计算(Dimensional Chain Calculation,DCC)对航空发动机输出轴零件的基准转换和形位公差进行分析。结果表明:DCC软件相比传统的手工计算,具有计算效率高和精确度高的优势;形位公差的处理结果更准确,解决了工艺复合的尺寸链计算问题。

In the process of aeroengine parts machining,in order to reduce the error accumulation and the comprehensive influence of Geometric Tolerance in machining process caused by the inconsistency of machining,design and measurement,the principle and skill of closed loop judgment were summarized from the judgment of closed loop and analysis of Geometric Tolerance in process dimension chain calculation. The reference conversion and Geometric Tolerance of aeroengine output shaft parts were analyzed by Dimensional Chain Calculation(DCC). The results show that compared with traditional manual calculation,DCC software has the advantages of high efficiency and accuracy. The processing result of Geometric Tolerance is more accurate,which solves the problem of dimension chain calculation of process composite.