基于加工因素和信噪比质量损失的并行公差设计

研究了加工因素与产品成本的关系,根据实际加工的统计数据,利用Matlab回归分析得到加工因素的成本综合影响系数,并给出了加工因素的成本—公差函数。针对加工工艺规划,提出采用信噪比衡量各道工序对产品质量损失的影响。利用成本—公差函数和信噪比质量损失,建立基于加工因素和信噪比质量损失的并行公差优化模型,实现了公差的并行设计,保证公差的经济性和可加工性。最后通过工程实例验证了所提出方法。

Concurrent Tolerancing Based on Process Factors and Signal-noise Ratio Quality Loss

The relationships between process factors and the costs of product were investigated. Using the practical statistic data, the comprehensive effect coefficient was obtained by regression analysis based on Matlab. As the result, the cost-tolerance function based on process factors was therefore established. In terms of given manufacture process planning, signal-noise ratio (SNR) was employed to scale quality loss of each process. Concurrent tolerancing optimization model was then proposed to implement concurrent tolerance design by using cost-tolerance function and quality loss with SNR. A practical example was introduced to validate the proposed method.