JPH03281012A - Manufacture of wire of material difficult to be worked - Google Patents

Abstract

PURPOSE:To easily obtain the round wire material of good quality by shearing the plate material to cut out the slit-coil, working with the roller dies to the round coil, feeding it to the scaling dies through the centering round dies, cutting and removing the surface skin. CONSTITUTION:The slit-coil W2 of rectangular section is cut from the material to be rolled W1 with the shearing machine, transferred to the roller dies 6 and the section is round worked to be deformed from an octagon to an ellipse and finally to a round. The burr B is included in the round coil W3 made to almost round section. This round coil W3 is drawn while being subjected to centering with next centering round dies 2, the surface skin W4 is cut and removed with the scaling dies 3 of next. The remaining round wire material W5 is made to a complete round in section without flow, and the fine round wire material of high quality is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a method for producing wire rods that are difficult to process and which can be produced in small quantities and in a wide variety of products.

(Prior art) Generally, high-alloy steel wire such as stainless steel is made from a billet melted in an electric furnace, which is then heated, rolled, and refined to create a wire rod with a diameter of about 5.5 cm. This material is manufactured by repeating annealing and continuous wire drawing until it has a diameter of, for example, 0.1 to 5.01 mm. The high-alloy steel wire produced in this way is processed into nails, wires, wire lobes, screws, piano wire, welding rod core wires, and the like.

A steel wire having a diameter of 0.1 to 5.0 IoI is manufactured by the above method. This method has stable quality and is suitable for mass production.

(Problem to be solved by the invention) However, as already clear from the above explanation,
One wire rod is manufactured from one billet, and it is suitable for large-scale production, but when producing small quantities of different types, or when trying to use plate materials as wire rods, such conventional methods are suitable. It is not possible to use stems.

Further, when starting from a billet, multi-stage caliber rolling is unavoidable and large-scale production equipment is required, so mass production must necessarily be carried out.

However, in recent years, there has been a demand for wire rods made from difficult-to-process materials such as titanium and titanium alloys, and this type of wire rod is generally required in small quantities. For such small-scale production, the method of caliber rolling the billet becomes extremely costly, and an alternative technique is required.

(Means for Solving the iJ Problem) In order to meet the above requirements, the present invention constitutes a production line for difficult-to-process wire rods from a shearing machine, a roller die, a centering round die, and a peeling die.

(Function) Cut out a slit coil by shearing a difficult-to-process plate material made of titanium, titanium alloy, or high alloy.The slit coil is made into a round coil with a roller die while still having a crisp, and this round coil is passed through a centering round die. Then, the wire is fed to a peeling die, and the epidermis is cut off with this peeling die to obtain a round wire rod.

It is preferable that the area reduction rate of the centering die is in the range of 4% to 6%, and the area reduction rate of the peeling die is in the range of 3% to 6%.

(Example) Embodiments of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a side sectional view of a manufacturing apparatus for a difficult-to-process wire rod according to the present invention.

The manufacturing apparatus 1 includes a centering round die 2, a peeling die 3, a centering roller 4, and a winding drum 5 arranged in the direction in which the material flows.

The centering round die 2, the peeling die 3, and the centering roller 4 are accurately centered, and the workpiece is held in a straight line between the centering round die 2 and the centering roller 4.

The reduction rate of the cross-sectional area of the work before and after the die is called the area reduction rate, and in the present invention, the area reduction rate of the centering round die 2 is 4 to 6%, and the area reduction rate of the peeling die 3 is 3 to 6%. The feature is that you can choose from a range of.

A method for manufacturing a wire rod using the apparatus for manufacturing a difficult-to-process wire rod having the above configuration will be described next.

Fig. 2 is a process explanatory diagram, in which a slit coil W2 with a rectangular cross section is cut out by a shearing machine (not shown) from a rolled plate material W1 having a plate thickness of 4II11 (Fig. 2 (a)). There is a burr B protruding from the part.

In this state, the slit coil W2 is sent to the roller die 6, where the cross section is rounded from hexagonal to oval to circular (FIG. 2(b)).

The burr B is included in the round coil W3 having a substantially circular cross section.

This round coil W3 is centered with the next centering round die 2 and drawn, for example, from 3.6g+s (diameter) to 3.5+u+ (Fig. 2 (C)), and then the skin W4 is drawn with the next centering die 3. is excised (Fig. 2(d)
)) Since this skin W4 contains burrs B and board surface flaws, the remaining round wire W5 of 3 to 4 mm (diameter) is perfectly round and free of flaws. That is, a high quality thin round wire rod can be obtained.

After that, it can be annealed and drawn at will in the post-process, and the cost of thin wire can be reduced by using a round wire rod with a small wire diameter.

That is, the purpose of the present invention is to cut off the surface with a round peeling die, and the centering die has a reduced area so as to provide the necessary resistance to apply back tension to the winding drum 5.

Therefore, the centering round die 2 has an area reduction rate in the range of 4 to 6%, and if it is less than 4%, galling will occur, and if it is 6%
If it exceeds the resistance, the resistance becomes excessive, and there is a risk that the wire may be pulled and broken in cooperation with the next peeling die 3.

The area reduction rate of the peeling die 3 is in the range of 3% to 6%.
If it is less than 6%, the removal of Paris will be incomplete, and if it exceeds 6%, the resistance will be excessive.

The centering roller 4 rotates freely and does not create the above-mentioned resistance.

As described above, the present invention is characterized by skillfully centering the workpiece and manufacturing a difficult-to-process wire rod without cutting the workpiece by the cooperative action of the centering die and the peeling die.

(Effects of the Invention) As described above, according to the present invention, a high-quality round wire rod can be easily obtained using a plate material such as titanium, and therefore manufacturing costs can be reduced even though the wire is produced in small quantities.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of a manufacturing apparatus for a difficult-to-process wire rod according to the present invention, and FIG. 2 is a process explanatory diagram. 1...Difficult-to-process wire rod manufacturing equipment 2...Centering round die 3...Peeling die

Claims (2)

[Claims] (1) Cut out a slit coil by shearing a difficult-to-process plate material made of titanium, titanium alloy, or high alloy.The slit coil is made into a round coil with a roller die while still having a sharp edge, and this round coil is passed through a centering round die. A method for producing a difficult-to-process wire rod, characterized in that the wire rod is fed to a peeling die, and the outer skin is removed by the peeling die to obtain a round wire rod. (2) The centering die has an area reduction rate of 4% to 6%, and the peeling die has an area reduction rate of 3% to 6%.
%. The method for manufacturing a difficult-to-process wire rod according to claim 1.