KR900002031B1 - Continuous casting method of an aluminium alloy complex wire-rod - Google Patents

Abstract

A core wire (a) and two Al coating wires (b and b') are unwound from respective pay-off drums (1,2 and 2'). The wires are straightened and cleaned during the unwinding step. The wires are extruded through an extrudidg chamber (7) to apply the coating wires on the surface of the core wire. The coating wires, prior to the extruding step, are passed over a rotating wheel and a narrow channel disposed within the extruding chamber where they are softened by the frictional heat generated between the coating wires and the rotating wheel. The extraded product wire (1b) is cooled and the coated wire wound on a take-up reel.

Description

Continuous manufacturing method of aluminum alloy composite wire

1 is a block diagram showing a manufacturing process according to the present invention.

2 is a manufacturing process diagram according to the present invention.

3 is a sectional view of an extruder for coating an aluminum alloy of a steel wire.

4 is a plan view of FIG.

5 is a perspective view of an aluminum alloy composite wire.

6 is a cross-sectional view taken along the line A-A of FIG.

7 is a cross-sectional view of the manufacturing process of the aluminum composite wire by a conventional manufacturing method.

* Explanation of symbols for main parts of the drawings

1, 2, 2 ': Winding drum 3, 4, 4': Straightener

5, 6, 6 ': surface pretreatment device 7: extruder

8 cooling device 9 front tensioner

10: Winding machine 11, 11 ': Inlet roller

a: steel wire b: aluminum

The present invention is an aluminum alloy composite wire (Aluminum clad steel wire: commonly referred to as "AS wire"), in particular, by continuously coating a non-corrosive aluminum alloy on the surface of a high strength steel wire can be continuously extruded and produced a uniform product The present invention relates to a continuous method of manufacturing an aluminum alloy composite wire.

More specifically, in the coating of the aluminum alloy on the surface of the steel wire, overall improvement of the pretreatment and extrusion processes for two aluminum alloy wires and one steel wire in order to continuously extrude and produce a uniform product.

So-called AS wires, which cover aluminum with steel wire, have been practiced for a long time and were produced by various types of manufacturing methods.

Each unique method has its own advantages and disadvantages. For example, it is mass-produced, but it is inferior in quality, or has a defect in cost that increases when productivity is improved.

The intention of the present invention is to avoid the above-mentioned defects only in the advantage, and the prior art is disclosed first to cover the focus.

The manufacturing method of various aluminum clad steel wire is divided as follows.

[Aluminum coating]

This method can be roughly divided into non-extruded and extruded, and the non-extruded has the advantage that the manufacturing process is continuous, but the disadvantages are larger than the extruded because it is disadvantageous in detail,

1. Aluminum molten metal deposition method: A method of coating aluminum by passing a steel wire through the aluminum molten metal or forming an intermetallic compound that is vulnerable to the interface between aluminum and steel wire. Is limited or non-uniform, there is a limit of cross-sectional shape, and heat is consumed a lot.

2. Normal temperature welding method: The aluminum strip is formed into two shells, wrapped in steel wire, and then rolled or coated to cover the steel wire, or defects in the aluminum welds are generated. Falls and difficulty in surface treatment of steel wire.

3. Powder sintering method: A method in which a certain amount of pure aluminum powder is sprayed on steel wire to form and sinter aluminum powder under the appropriate pressure and temperature to cover the steel wire, but continuous work is impossible, and There is a limiting problem, such as difficulty in controlling temperature and pressure, lowering productivity, and high manufacturing cost.

Therefore, what was developed in order to solve the above technical problem is the manufacturing process of the AS line by the extrusion method, and this method is currently put into practical use.

That is, by putting aluminum billet (billet) in the container and applying pressure to coat it on the steel wire, the advantage of this extrusion method,

1. There is no limit of cross-sectional shape, and it is easy to control the thickness of aluminum

2. No toxic intermetallic compound is prevented

3. It can be said that the bending property is excellent.

However, because it is a non-continuous extrusion method, it is inexpensive to require billet processing and preheating, and in particular, it is inadequate to produce a continuous process because it cannot be achieved.

Therefore, it is an object of the present invention to make the extrusion pressure uniform and to have a continuous manufacturing process while having all the advantages of the discontinuous extrusion method.

The purpose of the present invention is to have a method that is produced by continuous extrusion in the production of aluminum alloy composite wire as the coating metal is continuously loaded along the two incoming defects on the wheel rotating in the extruder by the frictional heat and pressure surface of the core material It is achieved by a continuous method for producing an aluminum alloy composite wire material in which the coating is uniformly coated.

Hereinafter, the manufacturing process of the present invention will be described in detail with reference to the accompanying drawings.

That is, as shown in FIG. 1 and FIG. 2, the steel wire a is wound on the winding drum 1 in the middle, and the aluminum alloy wire b is wound on the winding drums 2 and 2 'on both sides, respectively. It is wound and starts to feed at the same time and meets in the extruder.

That is, when the steel wire (a) passes through the surface pretreatment device (5) at this time, the oxide and other contaminants on the surface is removed and a rough surface advantageous for bonding (Bonding) is introduced into the extruder 7 through the linear straightener (3) Done.

On the other hand, the two-stranded aluminum alloy wires (b) on both sides are unwound from each winding drum (2) (2 ') and pass through the pretreatment apparatus (6) (6') via straight straighteners (4) (4 '). While the oxide layer on the surface and this material are removed, the heat of friction is generated as it enters the rotating wheel 12 of the extruder 7 and charged into the extrusion chamber 13 maintained at an appropriate extrusion temperature of about 300-500 ° C. The surface of the steel wire (a) is to be covered.

Here, while the steel wire (a) is passed through the extruder (7), the two aluminum alloy wire (b) is forcibly drawn by the inlet roller (11) (11 ') while being supplied in a reaction state by the frictional heat to the steel wire The high-temperature composite wire (AS), which is press-coated on the surface of (a), is thus hardened while passing through the cooling device (8), and passes through the front tensioner (9) to the finished product. 10) will be wound.

In the above process, the steel wire (a) and the aluminum alloy wire (b) are continuously fed at the same time in the winding drums (1), (2) and (2 '), and are continuously extruded and coated after being washed while being transported along each line. The reason for adopting two strands of aluminum alloy wires is that when the complete melting in the extruder 7 occurs, the coating thickness is limited because the viscosity is low, and in order to avoid the friction temperature, the other side of the steel wire is well coated. It is not possible to simultaneously enter two strands of aluminum alloy wire so that it can be immediately coated at a suitable extrusion temperature.

In addition, the extrusion die 10 in the extruder 6 through which the steel wire penetrates can be moved before and after, so that the coating state according to the extrusion pressure can be adjusted appropriately, and since the surface of the steel wire is washed by pretreatment, To be excellent.

Therefore, when the above system is operated, the composite wire is automatically manufactured continuously, thus providing the advantages of fast production speed and easy process management, and almost no material loss in the process, and eliminating the need for the billet manufacturing or the hot rolling process by the conventional method. It is possible to achieve a marked improvement in productivity.

Such the present invention is to provide a great effect that can continuously produce a composite wire having a uniform characteristic without limit to length.

Claims (1)

In the case of extrusion coating aluminum on the surface of the steel wire (a) by feeding one strand of steel wire (a) and two aluminum alloy wires (b) from each winding drum (1) (2) (2 '), the winding The steel wire (a) supplied from the drum (1) passes through the pretreatment device (5) and the linear straightener (3) for pretreatment and straightening, and then is charged into the extruder (7) at an appropriate temperature by frictional heat and an aluminum alloy wire. (b) passes through the straightening machine (4) (4 ') and the pretreatment device (6) (6'), straightening and pretreatment, and then the extrusion into the extruder (7) to extrude and deposit the surface After forming the composite wire (AS), it is cooled by the cooling device (8), and stretched by the front tensioning machine (9), the aluminum composite, characterized in that winding the finished product to the winder (10) Continuous production method of wire rod.

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