Metal deforming – By deflecting successively-presented portions of work during... – By use of deflector arranged to bend work transversely of...
Patent
1996-09-16
1999-01-05
Crane, Daniel C.
Metal deforming
By deflecting successively-presented portions of work during...
By use of deflector arranged to bend work transversely of...
72181, 72240, 72246, B21D 508
Patent
active
058551336
DESCRIPTION:
BRIEF SUMMARY
This application is 371 of PCT/NZ95/00112, filed Nov. 1, 1995.
This invention relates to rollforming apparatus and in particular rollforming stations with automatic gauge setting at said rollforming stations.
BACKGROUND
Rollforming apparatus has been developed in various configurations to produce profile shapes from sheet or coiled formable material such as sheet metal. The rollforming apparatus must be able to accommodate a range of material gauges. In the past this has been achieved by mechanical adjustment of the rollforming heads. This adjustment may be effected manually or there may be complex servo assisted adjusting devices for positioning the tooling clearances to match the thickness of the material being formed. Another approach is to cause one rollforming roller to rise linearly against the action of an appropriate biasing force.
All of the existing means of adjusting rollforming apparatus to accommodate varying material thicknesses are either complex and expensive, time consuming, or have a tendency to damage the lead in section of the material being formed.
It is therefore an object of the present invention to provide rollforming apparatus and in particular rollforming stations with automatic gauge setting means at said rollforming stations which will accommodate a range of different gauges of material while minimising damage to the material being formed particularly during adjustment to a new gauge of material.
PRESENT INVENTION
Accordingly the present invention consists in a rollforming station comprising, a tooling pedestal including a mounting means to enable mounting on the bed of rollforming apparatus, a rollforming head operatively mounted on said tooling pedestal said rollforming head having a first tooling roller rotatably mounted on a shaft supported by said pedestal, and a second tooling roller, also rotatably mounted on a shaft supported by said pedestal with the shaft of the second roller situated to one side with reference to the centre of the second tooling roller so that a force applied in the direction of material feed through the tooling roller will increase the tooling gap between the first and second tooling rollers and an automatic gauge adjustor including reaction means to resist the movement of the second tooling roller to increase the tooling gap, said reaction means applying a source of substantially constant pressure sufficient to achieve the rollforming action while allowing movement of the second rollforming roller about the eccentric mounting so that the second tooling roller will move against the reaction means in the direction of the material feed within a working range to accommodate the gauge of material being fed.
The invention further consists in rollforming apparatus using rollforming stations with the automatic gauge setting as set forth in the preceding paragraph.
DRAWING DESCRIPTION
One preferred form of the invention and modifications thereof will now be described with reference to the accompanying drawings in which;
FIG. 1 is a plan view of rollforming apparatus according to the present invention,
FIG. 2 is a side elevation of the apparatus illustrated in FIG. 1,
FIG. 3 is a pictorial view of one type of rollforming station according to the present invention,
FIG. 4 is a pictorial view of a second rollforming station according to the present invention,
FIG. 5 is a pictorial view of a modified rollforming head according to the present invention allowing repositioning of the rollforming rollers on the pedestal.
FIG. 6 is a side elevation of FIG. 5,
FIG. 7 is an end elevation of FIG. 5,
FIG. 8 is a detail of the automatic gauge adjuster, and
FIGS. 9a-e set out diagrammatically a series of alternative reaction means which may be employed in the automatic gauge adjuster.
PREFERRED EMBODIMENT
The present invention is concerned with rollforming apparatus for use in forming various profile shapes from sheet or coiled material. The apparatus 1 has a machined support bed 2 suitably mounted on a frame 3 to provide the support for rollforming stations 4.
REFERENCES:
patent: 3077131 (1963-02-01), McShane
patent: 3138979 (1964-06-01), Sendzimir
patent: 3577760 (1971-05-01), Franke
patent: 3691810 (1972-09-01), Tadeusz
patent: 4019358 (1977-04-01), Frohling
patent: 4156453 (1979-05-01), Scheinecker
Crane Daniel C.
Hayes Corporation
Johnston Michael G.
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