Metal deforming – By relatively movable offset tool-faces – Embodying three or more coacting relatively movable tools
Patent
1994-12-07
1996-12-31
Jones, David
Metal deforming
By relatively movable offset tool-faces
Embodying three or more coacting relatively movable tools
72298, 72387, B21D 702
Patent
active
055883222
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a support and positioning structure for tools used by a machine for bending elongate elements such as tubes or profiled sections.
Known structures of the type indicated are designed for well defined applications and therefore have the disadvantage that they cannot be adapted for use in bending elements different from those originally intended.
The object of the present invention is that of providing a structure of the type indicated above which is adapted for use in positioning and supporting various tools used for bending elongate elements of widely varying forms, thereby obtaining apparatus which is not excessively complex and which operates simply and with wide versatility in use.
This object is achieved with a structure of the type indicated above, characterised by the fact that it includes at least one base body and a support platform for said tools movably mounted on the base body and provided with means for rotating it circumferentially and for contemporaneously displacing it radially with respect to a pivot fixed to the base body.
Preferably, said base body and support platform form part of a slide movably mounted on a support frame, means being provided for moving the slide relative to this latter in at least one direction.
More preferably the structure according to the invention comprises two slides movably mounted on a single support frame and each comprising a respective base body and a respective support platform.
Before use of the machine for bending elongate elements into a desired configuration the slides are conveniently positioned with respect to the frame by their associated movement-drive means. Then the tools required by the type of bending which it is intended to effect are positioned on the support platforms of the slides. Subsequently the bending operation itself is effected by a suitable combined translational and rotational movement of the support platforms about their respective pivots.
In practice, the rotational movement allows the desired curvature to be obtained, whilst the translational movement, which takes place contemporaneously with the rotational movement, causes the curved element to yield so that it can no longer reassume its original, undeformed configuration as a result of the elastic restoring forces, once the bending stress has been released.
The present invention also comprehends a machine for bending elongate elements including a tool support and positioning structure of the type indicated above.
Advantages and characteristics of the present invention will become apparent from the following detailed description made with reference to the appended drawings, provided by way of non-limitative example, in which:
FIG. 1 is a perspective view of the structure of the invention;
FIG. 2 is a side view of the structure of the invention;
FIG. 3 is a plan view of the structure of the invention; and
FIG. 4 is a perspective view of a bending machine which utilises a structure of the type illustrated in the preceding figures.
A universal support and positioning structure for tools used by a bending machine (FIGS. 1 to 3) includes a pair of slides 2 slidably mounted on a support frame 4.
Each slide 2 comprises a flat base body 6 connected to a first plate 8 slidable on a second plate 10 by means of a pair of projections 12 which fit into respective grooves 14 formed in the second plate 10.
This latter is in turn slidable on the frame 4 by means of a pair of terminal coupling elements 16 which engage respective guides 18 of the frame 4.
Fixed to each first plate 8 is a first feed nut 20 associated with a first lead screw 22 extending transverse the frame. Similarly, each second plate 10 has a second feed nut 24 fixed thereto and associated with a second lead screw 26 mounted to lie along the longitudinal axis of the frame 2, substantially perpendicular to the first screw 22.
The base body 6 of each slide 2 supports a pin 28 and carries a rack 30, shaped in the manner of a circumferential arc on a portion of its outer perimeter. A table 32 is rota
REFERENCES:
patent: 1462315 (1923-07-01), Akey et al.
patent: 2884987 (1959-05-01), Shaw
patent: 4351178 (1982-09-01), Uehara
Bending Tooling S.R.L.
Jones David
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