基于红外热波无损检测技术的汽车零部件制造工艺稳健性能

Robust Performance of Automobile Parts Manufacturing Process Based on Infrared Thermal Wave Nondestructive Testing Technology

针对常规的红外热波无损检测技术缺失检测灵敏度、所得失稳指标不够精准的问题,开展基于红外热波无损检测技术的汽车零部件制造工艺稳健性能研究。以光谱传输特性为依据,根据散射光强度和传输路径建立红外热波无损检测模型;利用可靠性分析法分析随机变量空间。在此基础上通过获取约束条件得到零件拓扑结构;并分析红外热波无损检测损伤特征原因分布,以此明确检测灵敏度补偿要求,根据增益函数得到灵敏度补偿值;利用小波多尺度分析零件稳健程度,根据判断函数得出零件失稳指标。实验研究结果表明,与常规技术相比,所提出红外热波无损检测技术得到的应力值与标准值相近,得到的稳健性数据与实际相符。

In view of the lack of detection sensitivity and inaccuracy of the instability index of the conventional infrared thermal wave nondestructive testing technology,this paper makes a study of the robust performance of automobile parts manufacturing process based on the infrared thermal wave nondestructive testing technology.Based on the spectral transmission characteristics,the infrared thermal wave nondestructive testing model is established according to the scattered light intensity and transmission path,and then the random variable space is analyzed by the reliability analysis method.On this basis,the topological structure of the part is obtained by obtaining the constraint conditions;the damage characteristic distribution of infrared thermal wave nondestructive testing is analyzed,so as to define the requirements of the detection sensitivity compensation,and the sensitivity compensation value is obtained according to the gain function;then,the stability degree of the part is analyzed by wavelet multi-scale,and the instability index of the part is obtained according to the judgment function.The experimental results show that compared with the conventional technology,the stress value of the proposed infrared thermal wave nondestructive testing technology is similar to the standard value,and the robustness data is consistent with the actual situation.