METHOD OF MANUFACTURING ALUMINUM ALLOY PIPE PRODUCT

• Main Authors: KAWAZOE TOSHIYUKI, KANEKO RYUICHI
• Format: Patent
• Language: English
• Published: 30.04.2010
• Subjects: MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PUNCHING METAL; TRANSPORTING; WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL

PROBLEM TO BE SOLVED: To provide a method of manufacturing aluminum alloy pipe products by a spinning method of a soft material, wherein the spinning is possible to even a shape having large thickness difference, and the manufacturing cost is reduced by improving yield without causing no peeling-off in spite of a high working degree. SOLUTION: This method has: a first stage where a first pass a is performed by performing spinning so that the moving direction of rollers 1a and a direction in which a pipe material 2 is extended are the same direction with a core bar 3 which is rotated in one direction and extrapolated so as to corotate the pipe material 2 to be worked and a plurality of rollers 1a which are rotated in the opposite direction to the core bar 3; and a second stage where a second pass b is performed by performing the spinning while moving the rollers 1a in the same feeding direction as the first pass with the core bar 3 and the plurality of the rollers 1a which are respectively rotated in the opposite direction to the rotation in the first pass. COPYRIGHT: (C)2010,JPO&INPIT