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摘要：
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热锻模使用寿命低成为热锻件制造成本高的关键因素之一。在热锻模使用寿命低的原因分析与传统制造及修复方法存在问题的基础上，提出了热锻模3D打印制造与再制造技术的路线图，阐述了所提路线中每个步骤的技术内涵及其操作方法；研究了3D打印规划制订及规划实施、模膛表面的光洁加工及三维精密测量、失效模膛表层切除加工及模膛表层3D打印再制造等关键技术及装备；最后，通过汽车转向节热锻模修复再制造实例验证了技术的先进性及实用性。与传统方法相比，热锻模的制造/再制造效率提高了3.17倍，成本降低了75%，寿命提高了4.47倍。
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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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基金项目：
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国家重点研发计划（2018YFB1309100）
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作者简介：
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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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