著者

笠松 勇 古川 浩

出版者

公益社団法人 精密工学会

雑誌

精密工学会誌 (ISSN:09120289)

巻号頁・発行日

vol.59, no.12, pp.1973-1978, 1993-12-05 (Released:2009-07-23)

参考文献数

11

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In the explosive forming method using only a blasting cap as the explosion source, by changing the distance between the blasting cap and a blank, the amount of deformation of the blank is controlled.Therefore, it is important for controlling the amount of deformation to forecast how much proportion of the explosion heat of a blasting cap is converted to the deformation energy. In this report, the strain energy required for the deformation of a blank is calculated, and with its ratio to the explosion heat of a blasting cap, the energy efficiency of the blasting cap is to be determined. In the case of using a die with the cavity radius of 36mm and the shoulder radius of 3mm, and carrying out the free forming of a brass sheet of 0.8mm thickness, the following results were obtained. N amely when the distance between a blank and a blasting cap was close, and it was assumed that the strain energy of the blank is 0.79 kJ, and the explosion heat of the blasting cap is 0.3 kJ, the energy efficiency was 26%.When the distance was 1200mm, the strain energy was 0.16 kJ, the strain energy efficiency was 5.5%.