自動車用 Seat Recliner의 複合 Fine Blanking 適用에 관한 硏究

Abstract

Fine-Blanking technique was increasingly used worldwide in 1980’s to produce high quality products with lower consumption of energy. Korean industry followed same trend and increasing number of small and medium size industries as well as large one used Fine-Blanking technique. As a result of this past industrial practice, the Know-How of die design and process control for Fine-Blanking has been accumulated to some extent in Korean industry. In developed countries, researches have been done on surface coating of dies, development of appropriate die materials and associated surface treatment method. Also, significant efforts are being made to enhance the application of Fine-Blanking technique in conventional forming processes such as cold forging. For this purpose, relatively expensive Fine-Blanking equipments have to be incorporated into the conventional forming equipments. In this regard, large efforts are being made for the cost effective implementation and operation of multiphase forming processes integrated with Fine-Blanking phase. Since most of multiphase Fine-Blanking dies are progressive ones. The control of accuracy is most important. Therefore, Jig Grinding M/C is essential, and the feed should be less than 10μm. Because of above reasons, Fine-Blanking die becomes so expensive. It is suggested that the whole process is divided and Fine-Blanking technology is adopted when it is required. The Fine-Blanking technology experiment of thin plate has shown that the minimum burr exists in cut surface and if this surface has some function, this burr should be eliminated. The multiphase Fine-Blanking die design technology and expertise used in this project will be available to many small size industries which plan to produce high precision parts by Fine-Blanking process based in conventional press.