대형트럭 브레이크 오일커버를 냉간단조 공법으로 제조하기 위한 금형설계에 관한 연구 = Die design of cold forging for making large truck brake oil covers

다국어 초록 (Multilingual Abstract)

Due to increasing demands for environmental protection and cost reduction, the application of cold forging technology in the production of large-sized flange bolts, which was mainly manufactured through hot forging, has become necessary. An investigation was conducted on the die design of preform dies for cold forging a large-sized flange bolt. The die design, which utilized the upsetting process, was determined insufficient due to the excessive principal stress exerted on the die. Nevertheless, the die design utilized in the trimming process showed its compatibility with the cold forging of the flange bolt. The die design was evaluated using the Finite Element Method (FEM) to identify the most optimal state in terms of the preform die's outer diameter. As a result, the results of the study have been applied to the actual manufacturing process, leading to the creation of a forging die with an extended lifespan.