Optimum Development of the Circular Lancing Type Progressive Die for STS 304 Sheet Metal Working

摘要

The progressive die is multiple operations performed by means of a die having above two stages. The each of stages performs a different operation as the sheet metal passes through the die hole. In the field of design and making tool for press working, the progressive die for sheet metal (STS 304, thickness : 0.5mm) is a specific division. In order to prevent the defects, the optimum design of the production part, strip layout, die design; die making and tryout etc. is necessary. They require analysis of many kinds of important factors, i.e. theory and practice of metal press working and its phenomena, die structure, machining condition for die making, die materials, heat treatment of die components, know-how and so on. In this study, we designed and constructed a progressive die of multi-stage and performed tryout. Out of these processes the die development could be taken for advance. Especially the result of tryout and its analysis become the characteristics of this paper that nothing might be ever seen before such as this type of research method on all the processes.