船用12型发动机连杆锻模设计及其锻造工艺验证实例  

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

作　　者：刘江 徐皓[1,2,3] Liu Jiang;Xu Hao(School of Intelligent Manufacturing and Transportation,Chongqing Vocational Institute of Engineering,Chongqing 402246,China;School of Materials Science and Engineering,Chongqing University,Chongqing 400044,China;Chongqing Dongke Mould Manufacturing Co.,Ltd.,Chongqing 401320,China)

机构地区：[1]重庆工程职业技术学院智能制造与交通学院,重庆402246 [2]重庆大学材料科学与工程学院,重庆400044 [3]重庆东科模具制造有限公司,重庆401320

出　　处：《锻压技术》2022年第9期18-22,共5页Forging & Stamping Technology

基　　金：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)。

摘　　要：采用500 t双曲柄机械压力机和2500 t热模锻压力机生产船用12型发动机连杆。通过对该锻件的形状和结构的分析、阐述,对3个工步的制坯模具分别进行设计、分析和论证,并采用3工步分段制坯和模锻复合成形工艺进行小批量生产验证,得出预成形制坯模具的工步3的设计尤为关键,不但决定了终锻模膛的金属充填性能,而且对锻件的材料利用率有直接影响,还可以防止锻件产生折叠缺陷。通过对船用12型发动机连杆锻造工艺优化后,经过现场样件试制验证,得出船用12型发动机连杆的材料利用率为81.2%,合格率达99.4%,锻造工艺科学合理、切实可行。研究结论对小批量、多品种的锻件的研发试制具有重要的借鉴意义。For 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.

关 键 词：船用12型发动机连杆 分步制坯 模锻制造工艺 材料利用率 金属充填性能 

分 类 号：TG315.2[金属学及工艺—金属压力加工]