CH625011A5 - Reinforcing bar or reinforcing wire - Google Patents

Description

The invention relates to a reinforcement bar or reinforcement wire, which is provided with ribs and grooves in the course of the lateral surface.

Reinforcement bars or reinforcement wires are available in many different designs. The basic principle of production is to guide a starting material of a certain diameter through at least one set of rollers, the rollers exerting a force on the passing wire and deforming it to a smaller diameter, ribs and grooves being produced. This happens because grooves and ribs are also attached to the embossing rollers. When the wire or rod is passed through, the ribs, which are attached to the surface of the embossing rollers, press against the continuous material and cause a groove to be formed in a suitable shape. As a result, the rod or wire material is displaced and flows into the space that the grooves on the roller shell leave free; this creates the ribs. In order to allow the rod or wire material to flow out properly in order to form ribs, the grooves are so deep that the bottom of the groove and the head of the ribs do not meet during the rolling process.

A disadvantage of this known method is that the material is passed through too much, sometimes too uncontrollably, which has a disadvantageous effect on the strength values of the ribbed rod or wire, but in particular also makes the embossing rollers very difficult and expensive due to the necessary type of deformation are and are heavily attacked in production, ie due to large wear, a relatively frequent change is necessary.

The object of the invention is to produce a reinforcing bar or wire which a) has good adhesion in the concrete,

b) whose material properties can be varied according to the intended use and c) which, due to its design or manufacture, allows the shape of the roller rolls to be designed very simply and requires the roller rolls to be subject to the least possible wear.

The task is solved in that the starting material is deformed in the area of the groove (s).

The essence of the invention is therefore to be seen in the fact that deformation takes place only where grooves are introduced into the rod or wire starting material, while the original material remains in between after the deformation. For example, a wire starting material with a diameter of 10 mm is passed through the rolling rolls and an excellent reinforcement bar or reinforcement wire with grooves is obtained, the outside of the groove (s) having or maintaining the outside diameter of approximately 10 mm corresponding to the starting material and only the groove (s) ) is (are).

The method expediently takes place such that the rod or wire material, e.g. B. torsion-free, guided by at least one set of rollers and by the rollers only the part of the outer surface is deformed by embossing, which forms the groove (s), while the rollers or roller parts on the parts of the outer surface that have no grooves, neither directly nor become indirectly effective, so that the lateral surface remains unchanged there. Indirectly in the sense of this invention is meant here that no structure or material shift has taken place between the grooves, at most in the border area of the grooves, but this minimal shift is negligibly small. It has now become possible for the first time to obtain different rollers with differently designed (profiled) lateral surfaces for a set of rollers, so that there are also purely optically different patterns of the grooves.

This gives rise to the possibilities for various required technological properties. It is up to you to determine or influence the elongation and fatigue strength within wide limits, i.e. to vary or combine the material properties with regard to other values such as yield strength and tensile strength.

For example, you can use a roller that creates a helical groove, the grooves being inclined to the axial direction, e.g. B. between 15 ° to 75 ° or similar, are conceivable. Two other roles could not produce continuous helical grooves, but z. B. those with interruptions. Of course, you can also make two helical grooves and one with interruptions or with embossed profiles. It is even possible to provide the groove in a wavy shape and also in a helical shape.

If, for example, a roller diameter of 120 mm is used, then at least one groove need only be present at at least one point on the surface of the roller, so that after one revolution, the continuous helical groove on the rod or wire now has at least one transverse rib. This transverse rib (s) would therefore occur again and again after a maximum of around 377 mm in length.

This product can be achieved with a device in which the rollers of a roller set and the tool head carrying the roller rollers are driven independently of one another, for. B. of an electric motor with inner and outer rotor, one rotor being assigned to the tool head and the other rotor to the rollers; This system described above is assigned or supplied with an auxiliary power by a servo motor at any point

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625 Oli and the entire system should be divided into at least two axes, i. H. at least one axis contains the drive units and the other axis is only that of the tool head. At any point, another force, the above-described assistant, is then fed to the system. s The force generated by the servo motor should be at least as large as the sum of all friction and inertia losses (thus compensating for all of them) of the system.

Further details of the invention result from the drawing of an embodiment; here is a piece of a 10 bar surface.

With “x” the groove created can be seen in the sense of the above-described invention, the groove being able to have any cross-sectional shape, i. H. the groove shape becomes the desired one

Material properties adjusted. It could also show V-shape, double-V-shape, several semi-circular shapes lined up, etc.

The distance "y" practically corresponds to the original material, i. H. the bar surface has not been changed in this area by the embossing roll.

In general, the distance "y" will be greater than the distance "x", but this is not a mandatory requirement. The distance "y" can also be smaller than the distance "x".

For the sake of completeness, the area “z” is also indicated. To an extremely small extent, which is hardly recognizable in practice, the starting material can also be deformed somewhat. In practice this is meaningless; this value should only be named for reasons of correctness.

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1 sheet of drawings

Claims (7)

625 Oli PATENT CLAIMS 1. Reinforcement bar or reinforcement wire, which is provided with ribs and grooves in the course of the lateral surface, characterized in that the starting material is deformed in the region of the groove (s). 2. rebar or reinforcement wire according to claim 1, characterized in that the groove occupies between 10% and 80% of the outer surface. 3. Reinforcing bar or wire according to claim 1, characterized in that the groove depth between 2% and 30% - based on the diameter of the reinforcing bar or wire - makes up. 4. Reinforcing bar or wire according to claim 1, characterized in that the cross-sectional shape of the groove is a geometric shape. 5. A method for producing a reinforcing bar or wire according to claims 1-3, characterized in that only the grooves are embossed into the starting material while maintaining the other surface area. 6. A method for producing a reinforcing bar or wire according to claim 5, characterized in that the starting material is guided through at least one set of rollers and the part of the outer surface is deformed by stamping, which then forms the groove (s). 7. A method for producing a reinforcing bar or wire according to claim 5, characterized in that the core material is solidified in the axial direction with respect to the starting material and a zone of solidified material is stamped helically around the core material in the starting material.