US 2002/0116973 A1 · Method and device for producing curved lengths of spring band steel

Abstract

In a method and a device for producing curved lengths of spring band steel in order to produce precisely toleranced, dimensionally stable bending radii, the spring band steel (10) pass through a bending unit (20), which is comprised of three support points (23-25) spaced apart from one another, and passes through a reverse bending unit (22), which is disposed after the bending unit (20) in the advancing direction of the spring band steel (10) and is comprised of a fourth support point (32), and in a cutting unit (21), the curved and recurved lengths of spring band steel (11) are cut from the spring band steel (10). The central support point (24) of the bending unit (20) and the fourth support point (32) of the reverse bending unit (22) are embodied so that they can be moved and are controlled in their advancing in relation to the spring band steel (10) by means of a numerical control unit (20) in accordance with predetermined programs (FIG. 1).

Claims22

Dependent claims

A method of producing curved lengths of spring band steel, comprising the steps of bending a spring band steel (10) which is made up of lengths of spring band steel (11) that adjoin one another and are of one piece with one another, between three support points (23-25), which are spaced from each other in a spring band steel advancing direction and rest against alternating band sides of the spring band steel (10);

at a subsequent support point (32), bending back by a lesser bending degree in an opposite direction, cutting the length of spring band steel (11) that is treated in this manner from the spring band steel (10);
an embodying less of the three support points (25) for the bending of the spring band steel as a cutting edge (30) with a cuffing edge (30) on which a cutting blade (31) is conveyed passed in order to cut the length of the spring band steel (11).

A device for producing curved lengths of spring band steel (11), comprising a bending unit (20) comprised of three support points (23-25) spaced apart from one another through which a spring band steel (10), which is made up of the lengths of spring band steel (11) that are disposed one after another and are of one piece with one another, can be conveyed so that the support points (23-25) rest against alternating band sides in the spring band steel advancing direction, wherein the center support point (24) is embodied so that it can be moved lateral to the spring band steel (10) in order to adjust a bending radius;

a reverse bending unit (22), which is disposed after the bending unit (20) in the advancing direction of the spring band steel (10) and includes a fourth support point (32) that engages the same band side of the spring band steel (10) as the central support point (24) of the bending unit (20), which fourth support point (32) can be moved lateral to the spring band steel (10) in order to adjust a reverse bending radius;
a cutting unit (21) for cutting the length of spring band steel (11) passing through the banding and reverse bending unit (20, 22) from the spring band steel (10), the cutting unit (21) being disposed between the bending and reverse bending unit (20, 22).

Dependencies are inferred from the claim text.

Method and device for producing curved lengths of spring band steel

Life of this patent

Method and device for producing curved lengths of spring band steel

Life of this patent

Abstract

Claims22