Industry Internship: Process Optimization and Control in Resistance Brazing of Electrical Contact Materials

行业实习：电接触材料电阻钎焊工艺优化与控制

• 批准号: 9015647
• 负责人: Ahmed Sherif El-Gizawy
• 金额: $ 1.55万
• 依托单位: University of Missouri-Columbia
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-07-15 至 1991-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9015647&HistoricalAwards=false
• 关键词: Industry; Internship; Process; Optimization; Control

The objectives of this research are: (1) optimum design and control of the resistance brazing process using Taguchi-class optimization techniques; (2) investigation of the influence of process parameters on mechanical and electrical properties of the brazed joints; and (3) development of a physical model based on microstructural analysis in order to rationalize the results and to enhance the understanding of brazeability of electrical contacts made out of dispersion-strengthened composites. This study includes the development of an experimentally- based process model using Taguchi's experimental design approach. The signal-to-noise ratio method will be used to analyze the results in order to explore the optimum process conditions that yield the best joint quality with minimum variation about the target value. The results of the metallurgical investigation will be correlated with fracture loads, fracture surface, and resistivity of the brazed joint. This will provide a better understanding of the dependence of brazing joint microstructure on processing variables such as brazing current, heating time, electrode force, and joint clearance.

本研究的目的是：(1)利用田口优化技术对电阻钎焊工艺进行优化设计和控制：(2)研究工艺参数对钎焊接头机械性能和电性能的影响；(3)开发基于微观组织分析的物理模型，以使结果合理化，并加强对弥散强化复合材料电触头的可焊性的理解。这项研究包括利用田口的实验设计方法开发基于实验的过程模型。采用信噪比方法对结果进行分析，以探索在目标值变化最小的情况下获得最佳接头质量的最佳工艺条件。金相研究的结果将与断裂载荷、断口表面和钎焊接头的电阻率相关联。这将有助于更好地了解焊接接头微观结构与工艺变量(如焊接电流、加热时间、电极力和接头间隙)之间的关系。