Roll forming apparatus

Details Roll forming apparatus Roll forming apparatus

1984-05-03

1986-04-01

Bray, W. D.

Metal deforming

By deflecting successively-presented portions of work during...

By use of deflector arranged to bend work transversely of...

72179, B21D 508

Patent

active

045789789

ABSTRACT:
A roll forming apparatus for forming a flat strip material into a channel shape. This apparatus is composed of a first driving station, a second driving station, and at least two forming stations disposed between the both driving stations. Each driving station respectively contains a pair of driving rolls. The driving rolls of the second driving station is thus constructed to pull the strip at the higher speed than those of the first driving station. Therefore, to the portion of the strip between the first and second driving stations is applied a tensile stress while the strip is sent to the second driving station from the first driving station. At least two forming stations are disposed and respectively contain a pair of forming rolls which are rotated by the moving strip. At the same time, the strip is formed by the forming rolls. As the forming roll used in the present apparatus is a driven roll, maintenance such as adjusting the rotating speed of each station is not necessary. Also insofar as uniform tensile stress is applied to the strip while forming, the resulted strip seldom has an abnormal deformation or twisting. Thus a formed product with high dimensional accuracy can be obtained.

REFERENCES:
patent: 3344641 (1967-10-01), Pomory
patent: 3462989 (1969-08-01), Fischer, Jr.

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