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Abstract：
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The low service life of hot forging mold has become one of the key factors for high manufacturing cost of hot forgings. Based on the analysis of the reasons for the low service life of hot forging mold and the problems existing in traditional manufacturing and repair methods, the route diagram of 3D printing manufacturing and remanufacturing technology for hot forging mold was proposed, and the technical connotation and its operation method of each step in the proposed route were illustrated. Then, the key technologies and equipment of the formulation and implementation of 3D printing planning, the smooth processing of mold cavity and the three-dimensional precision measurement, the surface removal and processing of failed mold cavity and the 3D printing remanufacturing of mold cavity surface were studied. Finally, the advancement and practicability of the technology were verified by the example of repair and remanufacturing of hot forging mold for automobile steering knuckle. Compared with the traditional method, the manufacturing and remanufacturing efficiency of hot forging mold are increased by 3.17 times, the cost is reduced by 75%, and the life is increased by 4.47 times.
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Funds：
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国家重点研发计划（2018YFB1309100）
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AuthorIntro：
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夏巨谌（1941-），男，本科，教授，E-mail：xjc_hust@163.com；通讯作者：邓磊（1982-），男，博士，副教授，E-mail：denglei@hust.edu.cn
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Reference：
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