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在统计分析的理论基础上,首先将数控加工过程视作以参考模型为自变量,以加工结果为因变量的过程函数;然后将整个误差补偿过程分为3个典型的加工状态,分别构造各个状态的过程函数,并以材料去除量系数为桥梁,建立复杂薄壁件加工综合误差补偿数学模型;对数学模型进行泰勒展开,计算复杂薄壁件加工过程中的误差补偿量,重新构造误差补偿几何模型并生成新的加工程序,以减小复杂薄壁件的加工误差,提高加工质量。通过一组叶片加工对比试验,按照名义去除量进行加工的最大加工误差是0.094mm,而按照误差补偿量进行加工的最大加工误差是0.031mm,仅是前者的32.9%,说明了本文方法在提高加工精度方面的有效性。
Based on the theory of statistical analysis, the NC machining process is regarded as the process variable with the reference model as the independent variable and the machining result as the dependent variable. Then, the whole error compensation process is divided into three typical machining states, State of the process function, and material removal amount of the bridge as a bridge, the establishment of complex thin-walled complex machining error compensation mathematical model; Taylor mathematical model expansion to calculate the error in the process of complex thin-walled pieces of compensation, reconstruct error compensation Geometric model and generate a new processing program to reduce the processing complexity of complex thin-walled parts, improve processing quality. Through a group of leaf processing comparison test, the maximum processing error of the processing according to the nominal removal amount is 0.094mm, and the maximum processing error of processing according to the error compensation amount is 0.031mm, only 32.9% of the former, indicating that the method of the present document is improving Validity of machining accuracy.