塑性と加工
Online ISSN : 1882-0166
Print ISSN : 0038-1586
ISSN-L : 0038-1586
論文
順送加工でのかえりなしせん断法の簡略化
広田 健治出良 崇竹内 康晃橋口 啓也
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ジャーナル フリー

2014 年 55 巻 638 号 p. 233-237

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抄録

Push-back blanking is a two-step burr-free blanking process, in which a sheet metal is half-blanked and then pushed back between platens up to the original sheet thickness. However, when conducting this process in a progressive die system, an additional step is required to eject the blanked part from the sheet scrap. In order to reduce the number of steps, the incorporation of an ejection mechanism into the push-back step is proposed in this study, with this mechanism, a burr-free product could be separated and ejected in the push-back step using the lower platen with a hole. Experiments were carried out on a mild steel sheet, and conditions for successful push-back blanking were investigated. The optimum conditions obtained were applied to the revised push-back step. It was confirmed, through the experiments and FE analysis, that the success of the process depends on the diameter of the hole in the lower platen, and that, under the optimum hole diameter, burr-free parts with the same cut edge quality as those obtained by conventional push-back blanking are obtained with a reduced number of steps.

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© 2014 一般社団法人 日本塑性加工学会
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