JP2002534270A - Method of bending a shaped metal element while limiting the deformation of the cross-sectional shape - Google Patents

Abstract

(57) Abstract: The bending method of the present invention applies a bending force and simultaneously applies a restraining force to the element (10) in a direction substantially perpendicular to the direction of the force causing the bending. Limits any deformation of the cross-section. The associated device has restraining means for applying a restraining force to the element (10) in a direction substantially perpendicular to the direction of the force causing the bending.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD OF THE INVENTION

The present invention relates to a method and associated apparatus for bending a formed metal element in one or more dimensions.

[0002]

[Problems to be solved by the invention]

It is an object of the present invention to provide a method of the above type in which the bending of the formed metal element, in particular by drawing, does not have the side effect of deformation of the cross-sectional shape.

[0003]

[Means for Solving the Problems]

This object is achieved by a bending method characterized in that when a bending is applied, a restraining force is applied to the formed metal element in a direction substantially perpendicular to the direction of the force causing the bending.

[0004] This restraining force opposes the tendency of the cross-sectional shape of the element to deform, thus ensuring that it retains its original shape.

[0005] Open or partially closed mold elements are suitable for the method of the invention.

[0006] A further object of the invention consists of an apparatus for performing the method described above. This device is
A restraining means for applying a restraining force to the element to be bent in a direction substantially perpendicular to the direction of the force causing the bending.

[0007] Additional advantages and features of the present invention will become apparent from the following detailed description of embodiments, which proceeds with reference to the accompanying drawings, which are provided by way of non-limiting example only.

[0008]

DETAILED DESCRIPTION OF THE INVENTION An elongated shaped metal element 10 having a W-shaped cross section (see FIG. 1) is bent in several dimensions as indicated by arrows 14.

To carry out this bending process, an apparatus known only to a person skilled in the art, shown only schematically in FIG. 2, is used. The apparatus comprises a template 16 having a shape imparted to a metal element 10 and a series of dies 18 each driven by an actuator 20 and capable of pressing the element 10 against the template 16.

The surfaces of template 16 and die 18 are intended to contact and conform to the shape of element 10 to provide adequate support during the bending process.

[0011] The device may also include, in a direction substantially orthogonal to the direction of the force that causes bending by pulling,
It has means for imparting a binding force to the element 10.

These restraining means have pliers 22 located in recesses 24 formed along both sides of the template 16, the pliers 22 having jaws 26 which can clamp the lateral edges of the element 10. Have.

The jaws 26 of each pliers 22 are driven by mechanically, pneumatically, hydraulically or electrically actuated actuators 28.

In an embodiment of the present invention, although not shown, the pliers 22 can be replaced by a vice driven by a mechanical lever device instead of the actuator 28.

To perform the bending process, jaws 26 of pliers 22 hold the edge of element 10 against template 16. This causes the required bending by pulling out the element 10 without deforming the cross-sectional shape by the force applied by the die 18.

Depending on the shape of the element 10 and the bending force applied to the element 10, a certain number and / or a specific arrangement of pliers 22 are provided so that the cross section of the forming element 10 does not change during the process. It is possible to

Of course, while keeping the principles of the present invention the same, manufacturing details and embodiments
Without departing from the scope of the invention, the invention may be widely modified from that described and illustrated herein by way of non-limiting example.

For example, the bending of the forming element 10 can be performed with the longitudinal axis of the element 10 in the original plane.
It can be implemented only in one dimension.

[Brief description of the drawings]

FIG. 1 is a perspective view of a formed metal element bent by the method of the present invention.

FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1 of a forming element disposed in an apparatus operable to perform the method of the present invention.

[Explanation of symbols]

 Reference Signs List 10 molded metal element 22 pliers (restraint means) 26 jaw

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Claims (4)

[Claims] 1. A method for bending a formed metal element (10) in one or more dimensions, wherein a bending force is exerted while simultaneously constraining said element (10) in a direction substantially perpendicular to the direction of the force causing the bending. A method of bending, comprising applying a force to limit any deformation of the cross section of the element (10). 2. An apparatus for bending a formed metal element (10) in one or more dimensions, wherein said element (1) is oriented substantially perpendicular to the direction of the force determining the bending.
A bending device comprising a restraining means for imparting a restraining force to 0). 3. Apparatus according to claim 12, wherein the restraining means is actuated mechanically, pneumatically, hydraulically or electrically. 4. The restraining means comprises pliers (22) and / or a vise arranged along both sides of the element (10), the jaws being able to clamp the lateral edges of said element (10). Apparatus according to claim 2 or 3, comprising a part (26).