Transactions of Materials and Heat Treatment

Title：Design on forging die of connecting rod for type-12 marine engine and forging process verification example

Authors： Liu Jiang1 2 3 Xu Hao1 2 3

Unit： 1.School of Intelligent Manufacturing and Transportation Chongqing Vocational Institute of Engineering 2.School of Materials Science and Engineering Chongqing University 3.Chongqing Dongke Mould Manufacturing Co. Ltd.

KeyWords： connecting rod of type-12 marine engine step-by-step billet making die forging manufacturing process material utilization rate metal filling performance

ClassificationCode：TG315.2

year,vol(issue):pagenumber：2022,47(9):18-22

Abstract：

or the connecting rod of type-12 marine engine, 500 t double crank mechanical press and 2500 t hot die forging press were adopted for production, and the billet-making dies of three steps were designed, analyzed and demonstrated respectively by analyzing and expounding the shape and structure of the forgings. Then, the small batch production verification was carried out by the three-step billet making and die forging compound forming process to obtain that the design of step 3 for the preformed billet making die was particularly critical, which not only determined the metal filling performance of the final forging die, but also had a direct impact on the material utilization rate of the forgings, and prevented the forgings from producting folding defects. After optimizing the forging process of the connecting rod for type-12 marine engine, the trial production of sample on site was conducted. The results show that the material utilization rate for connecting rod of for type-12 marine engine is 81.2%, the qualified rate is 99.4%, and the forging process is scientific, reasonable and feasible. Thus, the research conclusion is of great significance to the research, development and trial manufacture of small batch and multi-variety forgings.

Funds：

重庆市教委重大教改项目（Z211014）；“双高”视野下OBE-CDIO在高职机电专业一体化课程建设与创新人才培养路径的应用研究(JG201002）；双创教育背景下高职院校“一核两翼四极”嵌入式创新人才培养模式研究(JG221014）；38MnVS6非调质钢PT132锻件锻后控制冷却工艺的研究（KJQN202103409）；SVDH20S非调质钢发动机连杆数值模拟热锻成形分析技术研究与应用（KJQN202203414）

刘江（1982-），女，硕士，讲师，工程师 E-mail：379280626@163.com 通信作者：徐皓（1979-），男，博士，教授，正高级工程师 E-mail：xuhaolj@mail.ustc.edu.cn

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