JPH0824941A - In-line sizing method for wire rod - Google Patents

Abstract

(57) [Summary] [Purpose] Good for skinning and intermediate drawing of wire rods. [Structure] In the middle of a transfer line for feeding the wire rod 1 in the direction of its central axis 1A, a plurality of rollers that freely rotate around the roller shaft 3A and that revolve around the central axis 1A of the wire rod 1 revolve around the roller shaft 3A. A sizing roller 3 is provided, and a wire rod 1
The in-line sizing method for the wire rod 1 in which the wire rod 1 is sized by being pressed by the sizing roller 3 at an appropriate reduction rate while being transported in the direction of the central axis 1A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used to perform in-line sizing on a wire rod in the pre-process of wire shaving (wire broaching; WB), or alternatively, in the pre-process of finish wire drawing of the wire rod. The present invention relates to an in-line sizing method for a wire used for in-line sizing in intermediate wire drawing.

[0002]

2. Description of the Related Art Wire rods are rarely used as they are rolled except in special cases, and most of them have a predetermined size and strength through a drawing process and are suitable for their respective applications, for example, Manufactured into mild steel wire rods, hard steel wire rods, piano wire rods, stainless steel wire rods, and wire rods for welding rod core wires.

As a manufacturing process of such a wire rod, for example, melting → degassing → agglomeration → soaking → slabbing → surface maintenance → rolling → annealing → skinning → wire drawing → intermediate annealing → The process of (drawing → intermediate annealing) → skin pass → steel wire rod is adopted.

In this manufacturing process, in the pre-drawing step, the entire length of the coil is scratched (heavy scratches, wire scratches, creases) and, depending on the type of steel, decarburization is not performed, and the entire length of the coil is scraped (wire scraping). Broaching) is a common practice.

As shown in FIG. 3, such a skinning of a wire rod is performed by providing a skinning die 12 in the middle of the transfer direction (arrow A direction) of the wire rod 11 from the feeding stand on the right side of the drawing, and the left side in the figure. The wire rod 11 is fed in the direction of the arrow A by winding it on the coil with the
The surface was scraped so that b would occur.

[0006]

As described above, when the surface of the wire rod 11 is scraped by the scraping die 12 while winding the wire rod 11 from the feeding stand to the coil, the diameter of the rolled wire rod 11 varies. When it is occurring, the cutting edge of the skin-cutting die 12 is damaged, uneven cutting occurs and an uncut portion occurs, and uneven cutting also occurs and the cutting edge of the skin-cutting die 12 is damaged. In addition, when the wire rod 11 moves during the transfer of the wire rod 11, the peeling die 12 is damaged, a barber pole (wiggle) is generated, or uncut due to uneven cutting. Since there is a problem that a part may be generated or the skin cutting die 12 may be damaged due to uneven cutting, it is necessary to eliminate such a problem. It was.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and shortens the life of the skinning die or causes uncut portions in the process of skinning a wire rod. The purpose is to be able to prevent.

[0008]

The in-line sizing method for a wire rod according to the present invention is such that the wire shaft is free to rotate around the roller shaft and the roller shaft is at the center of the wire rod in the middle of a transfer line for feeding the wire rod in the direction of its central axis. A plurality of sizing rollers that revolve around an axis and revolve are provided, and the wire rod is sized by being reduced at an appropriate reduction rate by the sizing roller while the wire rod is transported in the direction of its central axis. I am trying.

In the embodiment of the in-line sizing method for a wire according to the present invention, the sizing roller is arranged such that its roller axis direction is parallel to the center axis direction of the wire, and the sizing roller has its roller axis direction. The wire rod may be tilted with a skew angle θ with respect to the central axis direction of the wire rod, and in this case, the skew angle θ may be increased or decreased in accordance with the increase or decrease in the transfer speed of the wire rod.

Similarly, in the embodiment of the in-line sizing method for a wire according to the present invention, the area reduction rate can be adjusted by reducing the sizing roller.

Similarly, in the embodiment of the in-line sizing method for a wire rod according to the present invention, the sizing roller performs sizing in the pre-step of peeling the wire rod, or performs sizing as an intermediate wire drawing of the wire rod. It can be something.

Further, in the embodiment of the in-line sizing method for a wire according to the present invention, the sizing is 500
It can be performed at room temperature or warmer than ℃, and in this case, by setting it to 500 ℃ or less,
The sizing roller does not require so much heat resistance.

FIG. 1 shows an embodiment of an in-line sizing method for a wire according to the present invention.
Is transferred from the material supply stand on the right side in the figure in the direction of arrow A,
A peeling die 2 for removing surface flaws and decarburization by scraping the surface of the wire 1 to generate shavings 1b is provided on the left side of the drawing while being wound around a coil.

A plurality of sizing rollers 3 are provided on the transfer line of the wire 1 and in front of the skinning die 2.

Each of the plurality of sizing rollers 3 can freely rotate around the roller shaft 3A, and also revolves when the roller shaft 3A turns around the central shaft 1A of the wire rod 1. For this purpose, the respective roller shafts 3A are connected to each other by a connecting shaft 3B, and the roller shafts 3A are connected by a driving means (not shown).
Is rotated around the central axis 1A of the wire rod 1.

In this manner, the sizing roller 3 which rotates and revolves freely while the wire rod 1 from the material supply stand is wound around the coil on the left side of the skinning die 2 in the drawing.
By sizing, it is possible to make the wire diameter of the wire rod 1 that enters the skin-cutting die 2 uniform, and to make it possible to eliminate line runout. It is possible to prevent damage to the product, shortening of life, and occurrence of uncut parts.

By adjusting the amount of reduction of the sizing roller 3 to adjust the area reduction rate, it is preferable that proper sizing can be performed without difficulty.

By the sizing by the sizing roller 3 as described above, a spiral mark is formed on the surface of the wire 1. However, since the surface of the wire 1 is scraped by the scraping die 2, the scraping is performed. After passing through the die 2, the spiral mark is not formed.

Such an effect can also be obtained by providing the sizing roller 3 which rotates and revolves at the intermediate wire drawing stage before the finish wire drawing.

Even if the spiral mark is formed by sizing with the sizing roller 3, the spiral mark can be eliminated by finish drawing.

FIG. 2 shows another embodiment of the in-line sizing method for a wire according to the present invention, in which the wire 1 is transferred from the feeding stand on the right side in the figure in the direction of arrow A, and the coil on the left side in the figure. A peeling die 2 for removing surface flaws and decarburization by scraping the surface of the wire 1 to generate shavings 1b during the winding process is provided.

A plurality of sizing rollers 3 are provided on the transfer line of the wire 1 and in front of the skinning die 2.

Each of the plurality of sizing rollers 3 is free to rotate around the roller shaft 3A, and is revolved when the roller shaft 3A turns around the central shaft 1A of the wire rod 1. For this purpose, the respective roller shafts 3A are connected to each other by a connecting shaft 3B, and the roller shafts 3A are connected by a driving means (not shown).
Is rotated around the central axis 1A of the wire rod 1.

Further, each roller shaft 3A is inclined by a skew angle θ with respect to the direction of the central axis of the wire rod 1.

In this manner, while the wire rod 1 from the feeding stand is wound around the coil on the left side of the skinning die 2 in the drawing, it is sized by the sizing roller 3 which rotates and revolves to form the skinning die 2. It is possible to make the wire diameter of the entering wire rod 1 uniform and not to cause wire runout, and damage to the skin-cutting die 2 or shortening of the life or occurrence of uncut parts. It is possible to prevent such.

Then, the skew angle θ is increased / decreased in accordance with the increase / decrease in the transfer speed of the wire 1 so that the wire 1
The friction between the sizing roller 3 and the sizing roller 3 can be eliminated, and the sizing of the wire 1 can be performed well.

Further, it is desirable to adjust the reduction amount of the sizing roller 3 to adjust the area reduction rate so that proper sizing can be performed without difficulty.

Further, by increasing the number of the sizing rollers 3, the feeding speed of the wire rod 1 can be made faster, but the number of the sizing rollers 3 arranged around the wire rod 1 is sizing. Roller 3
It will be naturally limited by the size of the.

[0029]

Since the wire rod in-line sizing method according to the present invention has the above-described structure, the wire rod before entering the skinning die is sized inline during the skinning process, resulting in variations in wire diameter. In addition, since the wire shaving does not occur and the line runout does not occur, uneven wear of the skin-cutting die and early damage of the dies do not occur.

In an embodiment of the in-line sizing method for a wire according to the present invention, the sizing roller has a roller axis direction parallel to the central axis direction of the wire, so that the roller axis is sufficiently supported by both ends. Further, the sizing roller is supported, and the sizing roller is configured such that the roller axis direction is inclined at a skew angle θ with respect to the central axis direction of the wire, so that the sizing roller rotates with the transfer of the wire and As the sizing is performed while revolving, the friction between the wire and the sizing roller becomes extremely small, and friction marks are formed on the surface of the wire after sizing or spiral roller marks (spiral marks) are large. It is hard to be formed.

By setting the skew angle θ to increase / decrease in accordance with the increase / decrease in the wire rod transfer speed, the friction between the wire rod and the sizing roller becomes even smaller, and the sizing roller rotates. Not only is it extremely smooth, but sliding scratches due to friction are not easily formed on the surface of the wire.

By adjusting the amount of reduction of the sizing roller, reasonable in-line sizing can be performed.

Further, since the sizing roller is sized in the pre-shaving step of the wire rod, the wire rod before entering the skin-cutting die does not have a variation in wire diameter and the wire runout occurs. Since it does not occur, the useful life of the skinning die is increased and good skinning is performed.

Furthermore, by performing sizing at room temperature or at a temperature of 500 ° C. or lower, sizing of the wire can be performed more appropriately, and in the case of a difficult-to-process material, sizing is performed at a warm temperature.
Sizing can be performed more easily.

[0035]

EXAMPLE In this example, as shown in FIG. 2, two sizing rollers 3 are provided in the middle of the transfer line of the stainless steel wire 1 having a diameter of 10 mm after rolling and also in front of the skinning die 2. Was provided and the wire rod 1 was sized.

Each of the two sizing rollers 3 is free to rotate around the roller shaft 3A, and revolves when the roller shaft 3A turns around the central shaft 1A of the wire rod 1. For this purpose, the roller shafts 3A are connected to each other by a connecting shaft 3B, and the roller shafts 3A are connected by a driving means (not shown).
Was used so that the wire swivels around the central axis 1A of the wire rod 1.

Further, each roller shaft 3A is inclined at a skew angle θ of 18.6 ° with respect to the direction of the central axis 1A of the wire rod 1.

Then, the wire rod 1 is set to 50 m /
While pulling at a speed of min, the sizing roller 3 is revolved at a speed of 5000 rpm to perform sizing, and the wire rod 1 is reduced to a surface reduction ratio of about 2% to have a diameter of 9.9 mm. Subsequently, the surface was cut with a skin-cutting die 2 to obtain a drawing wire having a diameter of 9.7 mm.

As a result, it is possible to reduce the wire runout and the wire diameter variation of the wire rod 1 that enters the skin-cutting die 2 as compared with the prior art. Therefore, it is necessary to re-cut about 20% in the prior art. On the other hand, according to this example, it was possible to halve the amount that needed to be recut to about 10%.

[0040]

In the wire rod in-line sizing method according to the present invention, the wire rod is rotated about the roller shaft and the roller shaft is rotated about the center shaft of the wire rod in the middle of the transfer line for feeding the wire rod in the central axis direction. Since a plurality of sizing rollers that revolve around the wire rod are provided, and the wire rod is sizing by being pressed by the sizing roller at an appropriate reduction rate while the wire rod is transferred in the central axis direction, It is possible to sizing the wire material before entering, so that there is little variation in wire diameter and there is no wire runout, so uneven wear is generated in the skinning die. It also has the outstanding effect of being able to prevent premature damage and premature breakage, even when the wire diameter changes. Since it is not necessary to change the groll roll, it is not necessary to replace the caliber roll every time the diameter of the wire changes, which is the case when using the caliber roll, and work efficiency is significantly improved. The remarkable effect that it can be obtained is brought about.

In the embodiment of the in-line sizing method for a wire according to the present invention, the sizing roller has its roller axis direction parallel to the central axis direction of the wire, so that the roller axis is supported by both ends. It is possible to sufficiently support the sizing roller, and the sizing roller is such that its roller axis direction is inclined at a skew angle θ with respect to the central axis direction of the wire rod, so that the sizing roller moves along with the wire rod transfer. Since sizing is performed while rotating and revolving, it is possible to make the friction between the wire and the sizing roller extremely small, and a friction flaw is formed on the surface of the wire after sizing. It is possible to make it difficult for a large spiral roller mark to be formed.

By setting the skew angle θ to increase / decrease in accordance with the increase / decrease in the wire rod transfer speed, it becomes possible to further reduce the friction between the wire rod and the sizing roller. It is possible for the sizing roller to rotate remarkably smoothly and to be difficult to form a large spiral roller mark on the surface of the wire.

By adjusting the amount of reduction of the sizing roller, it is possible to perform inline sizing without difficulty.

By sizing the sizing roller in the pre-shaving step of the wire rod, it is possible to prevent the wire rod from having a variation in wire diameter before entering the skinning die. In addition, it is possible to prevent the occurrence of line runout, and it is possible to increase the useful life of the skinning die and to perform good skinning.

Furthermore, by performing the sizing at room temperature or at a temperature of 500 ° C. or less, it becomes possible to perform the sizing on the wire more appropriately, and even in the case of a difficult-to-process material, the sizing can be performed at the warm. By doing so, an excellent effect that workability is improved is brought about.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing one embodiment of a method for in-line sizing a wire according to the present invention.

FIG. 2 is a schematic side view (FIG. 2A) and a plan schematic view (FIG. 2B) showing another embodiment of the wire in-line sizing method according to the present invention.

FIG. 3 is a schematic explanatory view showing a conventional wire-shaving process.

[Explanation of symbols]

 1 Wire rod 1A Central shaft of wire rod 1b Shavings 2 Peeling die 3 Sizing roller 3A Roller shaft of sizing roller 3B Connecting shaft of roller shaft

Claims (8)

[Claims] 1. A wire rod is provided with a plurality of sizing rollers that rotate around a roller shaft and revolve around the roller shaft around the center axis of the wire, in the middle of a transfer line that feeds the wire in the direction of its center axis. The in-line sizing method for a wire rod, wherein the wire rod is sized by being pressed by the sizing roller at an appropriate surface reduction rate while being transported in the direction of its central axis. 2. The in-line sizing method for a wire rod according to claim 1, wherein the roller axis direction of the sizing roller is parallel to the central axis direction of the wire rod. 3. The in-line sizing method for a wire rod according to claim 1, wherein the sizing roller has a roller axis direction inclined with a skew angle θ with respect to a central axis direction of the wire rod. 4. The in-line sizing method for a wire according to claim 1, wherein the skew angle θ is increased / decreased in response to an increase / decrease in a transfer speed of the wire. 5. The in-line sizing method for a wire according to claim 1, wherein the area reduction rate is adjusted by pressing down the sizing roller. 6. The in-line sizing method for a wire according to claim 1, wherein the sizing roller performs sizing in a pre-step of scraping the wire. 7. The in-line sizing method for a wire rod according to claim 1, wherein the sizing roller performs sizing in the intermediate wire drawing in the previous step of finish wire drawing of the wire rod. 8. The in-line sizing method for a wire according to claim 1, wherein the sizing is performed at a normal temperature or a warm temperature of 500 ° C. or lower.