METAL PLATE SHEARING METHOD, PRESS COMPONENT MANUFACTURING METHOD, METAL PLATE, AND METAL PLATE SHEARING METAL MOLD

• Main Authors: MATSUKI YUICHI, NAKAGAWA KINYA, SHINGU TOYOHISA, YAMAZAKI YUJI
• Format: Patent
• Language: English; Japanese
• Published: 17.01.2022
• Subjects: MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PUNCHING METAL; TRANSPORTING; WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL

To provide a technique for shearing a metal plate such as a high strength steel plate with a shear end face having good stretch-flange crack resistance and delayed fracture resistance.SOLUTION: According to a method for shearing a metal plate 10, shearing is performed twice for at least a partial end of the metal plate 10, a first region ARA-A, in which a cutting allowance for second shearing is 5 mm or less, is formed by first cutting in double shearing, and the second cutting in double shearing is executed in the state that movement of an end side of the first region ARA-A is restrained. For example, an expansion region ARA-B, which is continuous with the first region ARA-A, is provided, and the expansion region ARA-B is restrained, thereby restraining movement of the end side of the first region ARA-A.SELECTED DRAWING: Figure 2 【課題】せん断端面の耐伸びフランジ割れ特性並びに耐遅れ破壊特性が良好である高強度鋼板などの金属板のせん断加工技術を提供することを目的とする。【解決手段】金属板１０をせん断加工する方法であって、金属板１０の少なくとも一部の端部に対し２度せん断加工を施し、２度せん断加工における１度目の切断で、２度目のせん断加工の切り代が５ｍｍ以下である第１領域ＡＲＡ－Ａを形成し、２度せん断加工における２度目の切断は、上記第１領域ＡＲＡ－Ａの端部側の移動を拘束した状態で実行する。例えば、第１領域ＡＲＡ－Ａに連続する張出領域ＡＲＡ－Ｂを設け、該張出領域ＡＲＡ－Ｂを拘束することで、第１領域ＡＲＡ－Ａの端部側の移動を拘束する。【選択図】 図２