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    • 9. 发明申请
    • APPARATUS AND METHODS FOR FORMING INTERNALLY AND EXTERNALLY TEXTURED TUBING
    • 用于形成内部和外部纹理管的装置和方法
    • WO0224365A3
    • 2002-06-13
    • PCT/US0129710
    • 2001-09-21
    • PACKLESS METAL HOSE INC
    • ZIFFERER L ROBERT
    • B21C37/20
    • B21C37/207Y10S72/703Y10T29/49382Y10T29/49384Y10T29/49385Y10T29/49391Y10T29/5166
    • A machine (20) may produce a tube (28) having textured internal and external surfaces (22, 24) in a single operation. Inner (36) and outer knurling tools (42) may form the textured surfaces. The texturing of the internal and external surfaces (22, 24) may be helical patterns of ribs (32) and grooves (30). The height of the ribs (32) formed in the internal and external surfaces (22, 24) may be less than about 35 mils. The angles of the patterns relative to a longitudinal axis of the tube (28) may be less than about 45 DEG . The angle of the helical pattern allows textured tubes (28) to be used as heat exchanger elements wherein flow is directed substantially coaxial to the longitudinal axes of the tubes. The helical pattern formed in the external surface (24) may be oriented in a right hand or left hand helical orientation. Similarly, the helical pattern formed in the internal surface (22) may be oriented in a right hand or left hand orientation.
    • 机器(20)可以在单个操作中产生具有纹理化的内表面和外表面(22,24)的管(28)。 内部滚花工具(36)和外部滚花工具(42)可形成纹理表面。 内表面和外表面(22,24)的纹理可以是肋(32)和凹槽(30)的螺旋图案。 形成在内表面和外表面(22,24)中的肋(32)的高度可以小于约35密耳。 图案相对于管(28)的纵向轴线的角度可以小于约45°。 螺旋图案的角度允许有纹理的管(28)被用作热交换器元件,其中流动被引导为基本上与管的纵轴同轴。 形成在外表面(24)中的螺旋图案可以以右手或左手螺旋取向定向。 类似地,形成在内表面(22)中的螺旋图案可以以右手或左手方位取向。