公开(公告)号：US4841617A

公开(公告)日：1989-06-27

申请号：US231073

申请日：1988-08-11

申请人： Martin Schmidt ,  Karl-Heinz Mayr ,  Fritz Fobbe

发明人： Martin Schmidt ,  Karl-Heinz Mayr ,  Fritz Fobbe

IPC分类号： B21C37/26 ,  B23K26/302

CPC分类号： B21C37/26 ,  B23K26/302 ,  Y10T29/49382 ,  Y10T29/49393 ,  Y10T29/49826 ,  Y10T29/53113

摘要： A method and apparatus for producing metallic heat exchanger tubes having a heat exchange surface that is increased by fins. A rotating tube has helically wound on its outer surface a strip that forms the fins, with this strip being fed to the tube surface under tension, and with the bottom edge of the strip being welded to the tube. The contact surface that exists between the tube and the bottom edge of the strip, and that extends helically on the surface of the tube, is fused exclusively at the surface of the tube with a laser beam that is directed in the region where the strip runs onto the surface of the tube, and that fuses a portion of the tube surface that in the axial direction of the tube corresponds at least to the width of the bottom edge of the strip and in the circumferential direction corresponds approximately to the same amount. At the same time, the laser beam fuses the bottom edge of the incoming strip in the region where the strip runs onto the surface of the tube. The fused surface areas are joined in a gap-free manner as the strip runs onto the tube, and are connected to one another to form a continuous, residual-gap-free welding.

摘要翻译： 一种用于制造具有由翅片增加的热交换表面的金属换热器管的方法和装置。 旋转管在其外表面上螺旋地缠绕形成翅片的条带，该条带在张力下被馈送到管表面，并且条的底部边缘焊接到管。 存在于管与条的底部边缘之间并且在管的表面上螺旋延伸的接触表面在管的表面处被熔化，其中激光束被引导到带延伸的区域中 在管的表面上，并且将管表面的沿管的轴向方向的部分熔化至少相当于条的底部边缘的宽度，并且在圆周方向上对应的量大致相同。 同时，激光束将输入条带的底部边缘熔合在带延伸到管表面的区域中。 当条带延伸到管上时，熔合的表面区域以无间隙的方式接合，并且彼此连接以形成连续的无间隙焊接。

公开(公告)号：US4969255A

公开(公告)日：1990-11-13

申请号：US345019

申请日：1989-04-28

申请人： Martin Schmidt ,  Karl-Heinz Mayr ,  Fritz Fobbe

发明人： Martin Schmidt ,  Karl-Heinz Mayr ,  Fritz Fobbe

IPC分类号： B21C37/26 ,  B23K26/302

CPC分类号： B21C37/26 ,  B23K26/302 ,  Y10T29/49382 ,  Y10T29/49393 ,  Y10T29/49826 ,  Y10T29/53113

摘要： An apparatus is provided for producing metallic heat exchanger tubes having a heat exchange surface that is increased by fins. A rotating tube has helically wound on its outer surface a strip that forms the fins, with this strip being fed to the tube surface under tension, and with the bottom edge of the strip being welded to the tube. The contact surface that exists between the tube and the bottom edge of the strip, and that extends helically on the surface of the tube, is fused exclusively at the surface of the tube with a laser beam that is directed in the region where the strip runs onto the surface of the tube, and that fuses a portion of the tube surface that in the axial direction of the tube corresponds at least to the width of the bottom edge of the strip and in the circumferential direction corresponds approximately to the same amount. At the same time, the laser beam fuses the bottom edge of the incoming strip in the region where the strip runs onto the surface of the tube. The fused surface areas are joined in a gap-free manner as the strip runs onto the tube, and are connected to one another to form a continuous, residual-gap-free welding.