SK10162001A3 - A procedure for bending a profiled metal element while limiting deformation of its cross-sectional shape - Google Patents

Abstract

The bending procedure calls for a restraining force to be exerted on the profiled metal element (10) in a direction substantially orthogonal to that of the forces causing the bend, at the same time as the said forces are being exerted, in order to limit any deformation of the cross-sectional shape of the element (10). The associated apparatus includes means for exerting on the elemnt (10) a restraining force in a direction substantially orthogonal to that of the forces causing the bending.

Description

The invention relates to a method of bending a profiled metal element in one or more dimensions and to a device.

BACKGROUND OF THE INVENTION

It is an object of the invention to provide a method of the aforementioned type, wherein bending the profiled metal element, in particular by drawing, does not entail the side effect of deforming its cross-sectional shape.

SUMMARY OF THE INVENTION

This object is achieved by a method of bending the profiled metal element, the principle being that a limiting force is exerted on the profiled metal element in a direction substantially perpendicular to the direction of the forces causing the bending at the time they act.

This limiting force counteracts the tendency of the cross-section of the element to deform, thereby ensuring that it retains its original shape.

Profiled elements of the open or partially closed type are suitable for the process according to the invention.

Further, the invention provides an apparatus for carrying out the above method, comprising means for exerting a limiting force on the element to be bent in a direction substantially perpendicular to the direction of the bending forces.

Other advantages and features of the invention will be apparent from the detailed description which follows, with reference to the accompanying drawings, which are given by way of non-limiting example only.

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-2Overview of drawings

Fig. 1 is a perspective view of a profiled metal member to be bent by the method of the present invention; and

Fig. 2 is a cross-sectional view along line II-II of FIG. 1 for a profiled element arranged on a device by which the method according to the invention can be carried out.

DETAILED DESCRIPTION OF THE INVENTION

The elongated shaped W-shaped metal element 10 in cross section (see FIG. 1) is to be bent in several dimensions as shown by arrows 14.

In order to carry out this method of bending, a device which is known per se in the prior art and is only schematically illustrated in FIG. 2 and includes a template 16 with a shape to be provided to the metal element and a series of clamping jaws 18 operated by respective actuators 20 capable of urging the element 10 against the template 16.

The surfaces of the template 16 and the jaws 18 to be in contact with the member W correspond to its shape to provide adequate support during the bending method.

The apparatus also includes means for exerting a limiting force on the member 10 in a direction substantially perpendicular to the direction of the forces that cause bending by pulling.

These limiting means include pliers 22 which are disposed in recesses 24 formed along both sides of the template 16 and have jaws 26 capable of gripping the transverse edge regions of the element 10.

The jaws 26 of the pliers 22 are actuated by respective actuators 28, which can be actuated mechanically, pneumatically, hydraulically or electrically.

In embodiments of the present invention (not shown), the pliers may be replaced by vices which are actuated by mechanical lever systems instead of actuators.

In order to carry out the bending method, the jaws 26 of the pliers 22 hold the edge regions of the element 10 with respect to the template 16 so that the forces exerted by

By means of the jaws 18, they caused the desired bending by pulling the element 10 without deforming its cross-sectional shape.

Depending on the shape of the element 10 and the bending forces exerted on it, it is possible to use a specific number of pliers 22 and / or their specific arrangement so that the cross-section of the profiled element remains unchanged throughout the process.

Naturally, the principle of the invention will remain the same, although the manufacturing details and embodiments may differ greatly from those described herein as a non-limiting example, without departing from the scope of the invention.

For example, the bending of the profiled element can be carried out in only one dimension, while the longitudinal axis of the element remains in the plane in which it was originally.

Claims (4)

A method of bending a profiled metal member (10) in one or more dimensions, characterized in that it provides a limiting force that is exerted on the member (10) in a direction substantially perpendicular to the direction of the bending forces, when the bending forces are applied to reduce any deformation of the cross-sectional shape of the element (10). An apparatus for bending a profiled metal member (10) in one or more dimensions, comprising means for exerting a limiting force on the member (10) along a direction substantially perpendicular to the direction of the bending forces. Device according to the preceding claim, characterized in that the limiting means are actuated mechanically, pneumatically, hydraulically or electrically. Apparatus according to claim 2 or 3, characterized in that the limiting means comprise pliers (22) and / or vices which are located along both sides of the element (10) and have jaws (26) capable of gripping the transverse edge regions of the element (10). 10). and