Method for producing steel fibers
AssigneeCent & Cent GmbH & Co. KG
InventorKarl-Hermann Stahl
Life of this patent
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Abstract
A method of making steel fibers, preferably for use as a concrete additive, and for the supply thereof in making steel fiber concrete, characterized in that to form the steel fibers (2) first a sheet-metal strip (1) is notched either on one face or both faces so as to form steel-fiber wires (4) that are initially connected together by webs (5), and that further, for subsequently converting the webs (5) into thin easily mutually separable separation webs forming separation surfaces that are fracture-rough and low in burring upon separation, the steel-fiber strip is subjected to a flexing process in which each web (5) is subjected to multiple bending deformations about its longitudinal axis in such a way that incipient cracks are produced at the webs (5) due to fatigue fracture and thus the separation webs are produced.
Claims20
A method of making steel fibers for use as a concrete additive, and for the supply thereof in making steel fiber concrete, the method comprising the steps of:
- to form the steel fibers, first notching a sheet-metal strip on one face or both faces so as to form steel-fiber wires that are initially connected together by webs, and
- thereafter, for converting the webs into thin easily mutually separable separation webs forming separation surfaces that are fracture-rough and low in burring upon separation, flexing the steel-fiber strip by subjecting each web to multiple bending deformations about its longitudinal axis, wherein the strip is alternated between an inclined position and a declined position with respect to the lateral width of the strip as the strip is subjected to the multiple bending deformations and in such a way that incipient cracks are produced at the webs due to fatigue fracture and thus the separation webs are produced.
Dependencies are inferred from the claim text.