B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
153/16
B21D 19/00 (2006.01) B21D 19/10 (2006.01) B21D 39/08 (2006.01) B21D 51/16 (2006.01) D06F 37/02 (2006.01)
Patent
CA 1166561
ABSTRACT OF THE DISCLOSURE A method and apparatus for flanging tube ends are disclosed particularly adapted for use in flanging cylindrical sheet metal tubes to form rotatable drums for laundry machines. The disclosed method of flanging one end of a thin metal tube includes the steps of mounting a sheet metal tube on a carriage, fixing the tube to the carriage, placing complementary pivotal inner and outer forming tools with parts thereof in contact with one end portion of said tube, the inner forming tools being pi- votal on an inner frame and the outer forming tools being pivotal on an outer carriage and moving the inner and outer forming tools with the metal between them in a manner such that the metal is castellated to form a radially inwardly directed flange on one end of said tube, which flange has a cross section or shape which includes two sets of oppositely directed ribs the sides of which increase in depth from the tube wall towards the tube centre. The apparatus for use in flanging one end of a thin metal tube comprises a frame, an outer carriage slidable on mem- bers forming part of the frame a plurality of radially arranged pivotal outer forming tools pivotally mounted on the outer car- riage so as to be pivotal through substantially 90°, an inter- mediate carriage slidable on the frame members, means on the intermediate carriage enabling a tube to be formed to be clamped thereon, a plurality of radially arranged pivotal inner forming means pivotally mounted on the intermediate carriage and arranged to be pivoted through substantially 90°, means to cause the outer forming means to pivot through said substantially 90° and force supplying means arranged to move the inner and outer forming means in a manner such that a radially inwardly directed flange on one end of the tube is formed, which flange has a width less Abstract Cont, than the radius of the tube and a cross sectional shape of a series of two sets of oppositely directed ribs the sides of which increase in depth from the tube wall towards the tube centre.
372149
Brodsky Alexander
Clark Richard J.
Fisher & Paykel Limited
George H. Riches And Associates
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