李丹丹, 王军见, 赵钦志, 边亚超, 崔英杰, 胡裕. 数控机床加工一致性评价方法研究[J]. 制造技术与机床, 2023, (11): 116-122. DOI: 10.19287/j.mtmt.1005-2402.2023.11.017
引用本文: 李丹丹, 王军见, 赵钦志, 边亚超, 崔英杰, 胡裕. 数控机床加工一致性评价方法研究[J]. 制造技术与机床, 2023, (11): 116-122. DOI: 10.19287/j.mtmt.1005-2402.2023.11.017
LI Dandan, WANG Junjian, ZHAO Qinzhi, BIAN Yachao, CUI Yingjie, HU Yu. Research on evaluation methods of cnc machine tool machining consistency[J]. Manufacturing Technology & Machine Tool, 2023, (11): 116-122. DOI: 10.19287/j.mtmt.1005-2402.2023.11.017
Citation: LI Dandan, WANG Junjian, ZHAO Qinzhi, BIAN Yachao, CUI Yingjie, HU Yu. Research on evaluation methods of cnc machine tool machining consistency[J]. Manufacturing Technology & Machine Tool, 2023, (11): 116-122. DOI: 10.19287/j.mtmt.1005-2402.2023.11.017

数控机床加工一致性评价方法研究

Research on evaluation methods of cnc machine tool machining consistency

  • 摘要: 根据加工一致性的内涵,文章提出了运用技术指标波动度评价数控机床加工一致性的方法,对绝对波动法和相对波动法进行了详细推导和计算。首先,针对实际加工精度包含多项指标的情况,建立了多指标评价模型,运用CRITIC赋值法进行无量纲化处理,计算相关系数矩阵和信息量,确定各指标的客观权重,然后将各指标波动度加权求和,获取综合一致性评价结果。然后为验证所研究评价方法的可行性,对某数控机床进行一致性研究,选取了典型加工件多项关键精度指标,评估了单项指标的波动度及多项指标的综合一致性,提出了面向不同精度指标的不同适用方法。最后总结了数控机床加工一致性评价规则,为评价同类型机床产品加工一致性的水平提供了统一的定量评价方法。

     

    Abstract: According to the connotation of machining consistency, a method is proposed for evaluating the machining consistency of CNC machine tools by utilizing the fluctuation degree of technical indicators in this paper. Firstly,the methods of absolute fluctuation method and relative fluctuation method are derived and calculated in detail. To address the inclusion of multiple indicators in actual machining accuracy, a multi-index evaluation model is established, and the dimensionless processing is conducted using the CRITIC valuation method. The objective weight of each indicator is determined by calculating the correlation coefficient matrix and information content; subsequently, the comprehensive consistency evaluation result is obtained by weighting and summing the volatility of each indicator. To verify the feasibility of the evaluation method, a consistency study is performed on CNC machine tools. Several key accuracy indicators for typical machining parts were selected, the fluctuation of individual indicators and the comprehensive consistency of multiple indicators were evaluated, and different applicable methods for different accuracy indicators were proposed. Finally, the evaluation rules for machining consistency of CNC machine tools are summarized, providing a unified quantitative technical means for evaluating the consistency level of the same type of machine tool products.

     

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