Metal deforming – By deflecting successively-presented portions of work during... – By use of deflector arranged to bend work transversely of...
Patent
1999-03-04
2000-04-04
Crane, Daniel C.
Metal deforming
By deflecting successively-presented portions of work during...
By use of deflector arranged to bend work transversely of...
72182, 413 17, 83885, B21D 1704
Patent
active
06044679&
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a method and a device for forming weakenings in a metal plate. Particularly the invention relates to a method, comprising of: thinned portion along at least one line to bend the metal plate along the line subsequent to the method; and roller deforming the metal plate along the line and over at least one surface of the metal plate with a force directed substantially transversely of the metal plate and sufficient to deform the metal plate.
Such a method is known from the International patent application WO 95/19233, where the roller is ruled, punched, etc. into the material of the plate and the roller is placed centrally relative to a holder, to which the roller is connected. From this document also a device is known for machining metal plate, comprising: a frame; support means which are mounted on the frame and which define a supporting plane for a metal plate; at least one holder mounted on the frame and which is rotatable aroud an axis of rotation lying substantially transversely of the supporting plane, wherein the holder 25 carries a machining roller provided with a machining outer surface; moving means for displacing a metal plate on the support means relative to the holder. In the device the same considerations apply as hereinabove in relation to the method.
A disadvantage of the known device and the known method is, that in order to go through a tight turn in a line to be followed by the roller, e.g. a bend line, the process of following this line has to be interrupted, the roller has to be lifted from the plate and the holder, to which the roller is connected, has to be turned in order to redirect the roller in the desired direction, after which the roller can be brought back down on the surface of the metal plate. In this interruption alignment between the roller and the plate can change, whereby a resumption of the process may take place at another position than the end position of the machining prior to the interruption.
Moreover any interruption in automated machine processes is undesirable as a result of the loss of time that occurs and the complexity of the process, if it is interrupted frequently, increases to such an extent, that control of the processes is also complicated.
The invention has for its object to obviate at least an above mentioned drawback and provides for this purpose a method, which is distinguished by applying a swivel castor, having an axis of rotation, around which a pressure roller is rotatable, and a swivel axis, where the axis of rotation is essentially perpendicular to a swivel axis and where the swivel axis and the axis of rotation cross at a distance. Also according to the present invention a device is provided, which is distinguished in that the roller is mounted on the holder in a swivel castor configuration on a roller shaft crossing the axis of rotation at a distance.
According to the present invention it is possible to selectively pivot the pressure roller during displacement thereof. In this manner it is possible to weaken a metal plate by thinning along a straight and/or curved line with a very tight bend therein or at the end thereof. In preference however the method herein additionally comprises arresting the pivotability of the pressure roller when it is not in use, so that the pressure roller can be set into operation again in the same position as that wherein the pressure roller was previously rendered inoperative such that arranging of a line can be continued after a short interruption without there being any difference in the position of the pressure roller and without any discontinuity in the form of the weakening along the line. Other advantages of arresting the pivotability are described hereinbelow in relation to the figures. This step alternatively comprises pivoting the pressure roller to a starting position when it is not in use. In this way a new line can be initiated from the same starting position each time. This is then preferably a starting position relative to a rotating station of for instance a punch pres
REFERENCES:
patent: 3333451 (1967-08-01), Inlow
patent: 3359773 (1967-12-01), Stuchbery
patent: 4552002 (1985-11-01), Haenni
patent: 4918956 (1990-04-01), Schoch
patent: 5138857 (1992-08-01), Siegert
patent: 5555759 (1996-09-01), Rosene
patent: 5575168 (1996-11-01), Rosene
Crane Daniel C.
Zovko Mark
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