To provide a press molding method by which in a pressed product comprising an intersection part in which two flange parts standing in different directions intersect at an end of a flat plate part, the intersection parts are connected in a substantially bag shape by a short flange part with a short flange width, as well as, local elongation at the short flange part is reduced, whereby cracking can be avoided.SOLUTION: A method comprises at least a bending process S3, and a gathering punching process S4. A connection flange part RH, which connects a first flange part 2a and a second flange part 3a which are respectively in an expanded state, is formed on a blank MS2 before bending, as well as, a contour line RK, which includes an outline 41a of a short flange part 4a in a part thereof, is formed on the connection flange part. In the bending process, after the first flange part is bent upward, the connection flange part is cut from a contour hole along an outline 31a of the second flange part, and thereafter, the second flange part and the short flange part are bent downward. In the gathering punching process, the connection flange part is cut along an outline 21 of the first flange part.SELECTED DRAWING: Figure 5
【課題】平板部の端部で異なる方向に起立する2つのフランジ部が交差する交差部を備えたプレス品において、交差部をフランジ幅の短い短フランジ部で略袋状に繋ぐと共に、短フランジ部での局部伸びを低減して割れを回避させ得るプレス成形方法を提供する。【解決手段】少なくとも、曲げ工程S3と、寄せ抜き工程S4とを備え、曲げ加工前素材MS2には、それぞれ展開状態の第1フランジ部2aと第2フランジ部3aを連結する連結フランジ部RHが形成されていると共に、当該連結フランジ部に短フランジ部4aの外形線41aを一部に含む輪郭孔RKが形成され、曲げ工程にて、第1フランジ部を上向きに曲げ加工した後で、連結フランジ部を輪郭孔から第2フランジ部の外形線31aに沿って切断してから、第2フランジ部と短フランジ部とを下向きに曲げ加工する。寄せ抜き工程にて、連結フランジ部を第1フランジ部の外形線21に沿って切断する。【選択図】図5
PRESS MOLDING METHOD
プレス成形方法
2021-04-30
Patent
Electronic Resource
Japanese
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