公开(公告)号：US4204415A

公开(公告)日：1980-05-27

申请号：US905070

申请日：1978-05-11

申请人： Poul E. Braad ,  Knud B. Jensen ,  Hans Rosendal ,  Flemming Sevaldsen

发明人： Poul E. Braad ,  Knud B. Jensen ,  Hans Rosendal ,  Flemming Sevaldsen

IPC分类号： B21F19/00 ,  B21C37/08 ,  B21C37/10 ,  B21D5/06 ,  H01B13/26 ,  B21D5/10 ,  B21D51/00

CPC分类号： H01B13/262 ,  B21C37/0818 ,  B21C37/10 ,  B21D5/06

摘要： A process and apparatus for continuously transforming a flat metal strip into an elongated pipe, in which the strip is fed through a forming tool along a curved forming path wherein the longitudinal edge portions are progressively turned up into cross-sectionally arcuate portions leaving between a substantially cross-sectionally rectilinear section, the width of which progressively decreases during travel of the strip through the forming tool. The curved forming path in the tool is such that it has a radius of curvature R(z) in its longitudinal direction, the arcuate portions each having a radius r.sub.o and the decreasing width of said rectilinear section being 2x(z) (wherein z is the distance of travel through the tool). The radius of curvature R(z) is controlled in sole dependence on r.sub.o and the differential quotient x'(z). In the resulting elongated tube, relative differences in travel distance between arbitrary areas in a transverse cross-section of the strip forming the pipe are substantially completely eliminated without plastic deformation in the longitudinal direction.

摘要翻译： 一种用于将扁平金属带连续地转变成细长管的方法和装置，其中，条带沿着弯曲成形路径被输送通过成形工具，其中纵向边缘部分逐渐变成截面弧形部分， 横截面直线部分，其宽度在带材穿过成型工具的行进期间逐渐减小。 工具中的弯曲成形路径使得其在其纵向具有曲率半径R（z），弧形部分各自具有半径ro，并且所述直线段的减小宽度为2x（z）（其中z为 通过工具的距离）。 曲率半径R（z）仅依赖于ro和微分商x'（z）来控制。 在所得的细长管中，形成管的条的横截面中的任意区域之间的行进距离的相对差异基本上完全消除，而在纵向方向上没有塑性变形。