Metal deforming – By deflecting successively-presented portions of work during... – By use of deflected arranged to provide longitudinally...
Patent
1992-01-04
1994-09-13
Crane, Daniel C.
Metal deforming
By deflecting successively-presented portions of work during...
By use of deflected arranged to provide longitudinally...
140147, B21D 305
Patent
active
053458044
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF INVENTION
The present invention relates to a straightener with rollers designed in particular for the straightening of steel bars for concrete.
It is known that elongated metal products obtained by rolling and in particular steel bars for concrete, require straightening before use to bring them into true.
In practice it is difficult to achieve perfect straightening because of constraints of all kinds which exists in the product to be straightened before being introduced into the straightener.
Straighteners which operate by alternating flexion in the same plane are already known. The straighteners circulate the wire to be straightened between rollers which are on either side of the axis of the machine which causes alternating flexion resulting in the elastic limit of at least part of the section of the product to be straightened to be exceeded by subjecting it to permanent deformations which diminish progressively to reach a virtually nil value as the product to be straightened passes through the straightener.
It is also known that to achieve satisfactory straightening it is necessary to regulate precisely the position of the various rollers relative to the axis of the progress of the product to be straightened, and also the distance separating the various rollers along the axis of the straightener.
The result is a considerable waste of time and considerable difficulty in adjustment when the straightener has to deal successively with products of different diameter.
This disadvantage is particularly serious in the case where the product to be straightened consists of steel bars for concrete which have dimensional characteristics that can vary quite considerably in the same lot.
Devices known from U.S. Pat. No. 4,719,781 permit the simultaneous displacement and adjustment of several rollers in order to adapt the straightener to the dimensional characteristics of the product to be straightened, but to date these devices do not give complete satisfaction because they do not take into account all the adjusting required to obtain satisfactory straightening.
Furthermore, these known devices do not in general permit the axis of the straightened product to be kept in a fixed position when the setting of the rollers is modified to take into account the dimensional variations of the product that is to be straightened, when entails adjustment of the devices upstream and downstream of the straightener, or failing this an alteration of the straightness of the product.
It is also known that to obtain correct straightening it is necessary to apply successive alternating flexion in at least two different planes.
SUMMARY OF THE INVENTION
The present invention relates to a straightener which by more simple and economical means enables this problem to be addressed and which permits more rapid and efficient adjustment of the longitudinal position and the distance between the various rollers depending on the dimensional characteristics of the product to be straightened, to be retained.
The object of the present invention is a straightener with rollers that can be used for elongate metal products and in particular for the straightening of steel bars for concrete, characterized by the fact that it includes in combination several plates which can be moved while remaining perpendicular to the axis of the product that is to be straightened, each plate having on both of its working faces, articulated at one of its points, a pivoting roller bearing arm, the other extremity of which is held so that it can move in the vicinity of the adjacent plate when the distance separating the two plates in question is varied, this arm supporting a straightening roller situated essentially at a quarter of the distance between the point of articulation of the arm onto the plate and the extremity of the arm which situated in the vicinity of the neighboring plate, an adjustment means, such as an eccentric permitting pre-regulation of the position of the axis of the roller relative to the axis of the product to be straightened, so that
REFERENCES:
patent: 4719781 (1988-01-01), Cloup
LandOfFree
Roller straightening device for steel bars for concrete does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Roller straightening device for steel bars for concrete, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Roller straightening device for steel bars for concrete will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1112519