CAJ | 학술논문

目的：研究连杆无飞边锻造工艺，以及闭模锻造过程中中间工序件的设计和所需的模具系统。方法通过建立有限元模型，分析连杆的预锻和终锻过程中金属流动长度、成形载荷和模具寿命，为模具设计提供数据支持。结果数值模拟结果表明金属充模效果良好；连杆大端主要在预锻中成形，而连杆小端和杆部主要在终锻中成形；预锻和终锻的最大成形载荷分别为437 t 和850 t；连杆大端的模腔圆角为模具失效危险区。结论通过辊锻制坯、预锻分配物料和终锻精密成形，实现了连杆的无飞边锻造。
목적：연구련간무비변단조공예，이급폐모단조과정중중간공서건적설계화소수적모구계통。방법통과건립유한원모형，분석련간적예단화종단과정중금속류동장도、성형재하화모구수명，위모구설계제공수거지지。결과수치모의결과표명금속충모효과량호；련간대단주요재예단중성형，이련간소단화간부주요재종단중성형；예단화종단적최대성형재하분별위437 t 화850 t；련간대단적모강원각위모구실효위험구。결론통과곤단제배、예단분배물료화종단정밀성형，실현료련간적무비변단조。
Objective To investigate the flashless forging process connecting rod, as well as the design of intermediate goods and the die system needed for closed-die forging. Methods Finite element model was estimated to analyze the metal flowing path during pre and final forging, forming load and tool life, which provided data support for the tool design. Re-sults Results of numerical simulation showed that: the metal die-filling was desired; the big end of connecting rod was mainly formed in the pre-forging, whereas small end and stem were mainly formed in the final forging; the maximum form-ing loads of pre and final forging were 437 t and 850 t, respectively; the dangerous zone of tool failure occurred at the big end of connecting rod in the cavity. Conclusion Through rolling for blank preparation, pre-forging for materials distribu-tion and final forging for precision forming, flashless precision forging for connecting rod was achieved.