关键词: 工业工程技术；精益生产；价值流程图；影像分析；热处理氮化作业过程；改善案 例；优化方案

Abstract: In recent years, with the continuous development of the national manufacturing industry, in order to make the lean thinking and industrial engineering technology gradually spread to various enterprises, this paper describes HD company's application of the improvement tool of industrial engineering—value stream map, to make the operation process concrete, distinguish value-added time and non-value-added time from the value stream map, and optimize and improve its heat treatment nitriding operation process combined with lean thinking. At the same time, a special improvement team is set up to follow up the whole process of heat treatment nitriding operation, fully understand the complete process of nitriding operation, draw the current value stream map, and then organize the members of the improvement team to review the current value stream map and look for improvement points, and finally achieve the cost reduction and efficiency of the enterprise, reflecting the great value of industrial engineering technology in the automobile manufacturing industry.

Key words: Industrial engineering technology; Lean production; Value flow diagram; Image analysis; Heat reatment nitride operation process; Improvement case; Optimization scheme