METHOD FOR MANUFACTURING BOTTOMED CAN AND INTERMEDIATE MATERIAL FOR BOTTOMED CAN MANUFACTURING

To provide a method for manufacturing a bottomed can, which can provide high-quality bottomed can suppressed in distortion and bending with high accuracy while a given part of a blank can be thinned and reduce the amount of scraps to be discarded, and an intermediate material for bottomed can manufa...

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Bibliographische Detailangaben
Hauptverfasser: NAGAFUNE TATSUYA, NAKAGAWA TAKANORI, OHORI KEI, ISHIGURO HIDENORI
Format: Patent
Sprache:eng ; jpn
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Beschreibung
Zusammenfassung:To provide a method for manufacturing a bottomed can, which can provide high-quality bottomed can suppressed in distortion and bending with high accuracy while a given part of a blank can be thinned and reduce the amount of scraps to be discarded, and an intermediate material for bottomed can manufacturing.SOLUTION: This bottomed can manufacturing method is for manufacturing a plurality of bottomed cans 10 from one metal original plate 20, and comprises: a coining step of coining at least a part of a blank scheduled region 30 of the original plate which becomes a blank 33; and a forming step of executing punching to obtain the blank from the original plate and squeezing the blank into a bottomed can shape. These steps are carried out in this order. A buffer hole forming step of boring a blank flow buffer hole 25 in the blank scheduled region of the original plate is carried out before the coining step.SELECTED DRAWING: Figure 1 【課題】ブランクの所期の部分を薄肉化することができながら位置決めに高い精度が得られてゆがみや反りの抑制された高品質の有底缶を得ることができ、かつ、廃棄されるスクラップ量が低減される有底缶の製造方法および有底缶製造用の中間材の提供【解決手段】本発明の有底缶の製造方法は、1枚の金属製の原板20から複数の有底缶10を製造する方法であって、原板におけるブランク33となるブランク予定領域30の少なくとも一部をコイニング加工するコイニング工程と、原板からブランクを得る打ち抜き加工および得られたブランクを有底缶形状に成形する絞り加工を施す成形工程とをこの順に行い、コイニング工程の前に、原板のブランク予定領域間に素材流動緩衝用孔25を穿設する緩衝用孔形成工程を行う。【選択図】図1