Method for bending forging artistic metallic pipes

Details Method for bending forging artistic metallic pipes Method for bending forging artistic metallic pipes

1997-09-10

1999-06-01

Cuda, Irene

Metal working

Method of mechanical manufacture

Utilizing transitory attached element or associated separate...

294695, 295274, 72369, 724662, 264221, 264295, 264339, B21D 3500

Patent

active

059078960

ABSTRACT:
A method for bend forging an artistic metallic straight pipe, wherein, a die core made from a steel rope is placed in the pipe bore, and a filler with plastisol uniformly mixed up is then introduced into the pipe bore until it is saturated to form a solid straight pipe. The latter is placed in an upper and a lower bendable die housing each of which forms a trough, and both ends of the die housings are provided with latch holes. Polyurethane is poured into the troughs to envelop the straight pipe, many hard bracing stubs are buried in the top/bottom of the troughs after heating, to solidify the polyurethane, a flexible die set is formed. The external top and bottom surfaces of the upper and lower die housings are provided thereon with two laminated springs, so that when the die set is forged, action force can be uniformly distributed to render the straight pipe to be bending forged to have the desired bending curvature. The bent solid pipe is then taken out, the pipe bore is heated to slightly melt and take out the plastisol in the die core, and a hollow bent artistic metallic pipe is thus formed.

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