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    • 4. 发明授权
    • Method of manufacturing an undercut deep-drawn workpiece
    • 底切深冲工件的制造方法
    • US5775159A
    • 1998-07-07
    • US651380
    • 1996-05-22
    • Reinhard SchroterPeter Bach
    • Reinhard SchroterPeter Bach
    • B21D53/00B21D53/88B21D22/00B21C37/02B21D22/21
    • B21D53/00B21D53/88
    • A method of manufacturing of an undercut deep-drawn workpiece from a sheet material including deforming a sheet material into a pot-shaped piece having a circular cross-section with a diameter, which decreases in a course of deformation, while retaining a flat circumferential rim flange, increasing a depth of the pot-shaped piece with formation of an outwardly cambered bottom substantially simultaneously with decreasing the diameter of the pot-shaped piece, forming, one after another, two opposite flat surface side walls on the pot-shaped piece, with bringing them into divergent, relative to each other, angular positions, while synchronously flattening the bottom of the pot-shaped piece, and forming two further opposite parallel flat surface side walls to obtain a substantially rectangular cross-section of the pot-shaped piece.
    • 一种从片材制造底切深冲工件的方法,包括使片材变形成具有直径的圆形截面的壶形件,该直径在变形过程中减小,同时保持平坦的周缘 凸缘,增加了盆形件的深度,同时形成一个向外弧形的底部,同时减小了壶形件的直径,一个接一个地形成了盆形件上的两个相对的平面侧壁, 相对于彼此具有角度位置,同时使盆形件的底部平坦化,并且形成两个另外相对的平行平面侧壁,以获得盆形件的基本上矩形的横截面 。