Metal deforming – By use of non-deforming work-gripping clamp and relatively... – Plural or complex apparatus
Patent
1982-01-28
1984-08-14
Crane, Daniel C.
Metal deforming
By use of non-deforming work-gripping clamp and relatively...
Plural or complex apparatus
72369, 72416, 72481, 29157A, B21D 700, B21D 714
Patent
active
044649231
ABSTRACT:
Thin-wall, corrugated pipe having alternating, annular ridges and valleys along its length is bent between a pair of die parts selectively to reform the normal configuration of a valley and change the linear distance between segments of a pair of ridges adjacent said valley thereby to form an incremental bend in the pipe. Thereafter, a predetermined number of incremental bends are formed in consecutive valleys to obtain a desired angle of bend. A radial angle fixture is engaged on one end of the pipe to determine and maintain the radial position of the pipe during the bending of the pipe, and a bend angle protractor is provided to determine precisely the angle to which the pipe is bent. The radial angle fixture further serves to maintain the pipe entering the bending tool perpendicular to the plane of the pair of dies.
REFERENCES:
patent: 56337 (1866-07-01), Fleetwood
patent: 519062 (1894-05-01), Hoell et al.
patent: 1517678 (1924-12-01), Holub
patent: 1553817 (1925-09-01), Holub
patent: 3670553 (1972-06-01), Nothum et al.
patent: 4205544 (1980-06-01), Foster
patent: 4249405 (1981-02-01), Cyr
Boggs Samuel D.
Miller Clement J.
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