Metal deforming – Tool and/or tool holder – Including flexible or yieldable tool or support
Patent
1999-01-21
2000-04-04
Crane, Daniel C.
Metal deforming
Tool and/or tool holder
Including flexible or yieldable tool or support
724662, 724669, 72149, 72398, B21D 901
Patent
active
060446870
ABSTRACT:
A three-dimensional simple flexible mould for bending pipes comprised of a plurality of arciform or half-circled spring elements, pins and chucking rings for being a protecting mould in a three-dimensional pipe bending process. The two ends of every spring element have two lapping portions with a hole both or respectively with a hole and a snap mouth or with a snap mouth both for receiving two pins therein. The spring elements are strung with pins to form a spiral spring typed flexible mould. Thereby, a straight pipe to be bent can be placed for being processed by a three-dimensional pipe bending process with a pipe bending machine. The spring elements can scatter the stress in bending. Thus can increase the bending strength of the pipe under bending moment. The bending process and detachment of the mould are simple and can improve the technique of processing in making artistic pipes.
REFERENCES:
patent: 174609 (1876-03-01), Wright
patent: 279573 (1883-06-01), Leaycraft
patent: 2963068 (1960-12-01), Chiappe
patent: 5272905 (1993-12-01), Parlow
patent: 5323631 (1994-06-01), Weykamp
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