JPS62166007A - Pointing method for hot rolled wire - Google Patents

Abstract

PURPOSE:To form a pointed part having a required shape without errors by decelerating the wire at the end period of coiling of a rolled wire and pointing one end of the wire prior to coiling. CONSTITUTION:The wire subjected to prescribed finish rolling is first guided to the 1st coiler 4' by a branching device 3. The speed of the wire is gradually decreased after the passage of the tail end of the wire through the device 3. The tail end of the decelerated wire is rolled by a pointing machine 6 installed on the upper stream of pinch rolls 5 and is subjected to a required pointing operation. The need for a high speed branching device for division is eliminated and the pointing position is surely controlled by the above-mentioned method.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an improvement in a method for forming a date portion of a desired shape on the terminal end of a hot rolled wire rod in a hot rolling process.

(Prior art) In recent years, in order to eliminate the complexity and labor of date work required in subsequent secondary processing such as wire drawing, and to improve productivity, a date part of a desired shape has been simultaneously formed in the hot rolling process. A date method for hot rolled wire rods is proposed in Japanese Patent Publication No. 60-28563.

This date method involves deflecting the rolled wire from the center of the rolling line during the rolling line after finish rolling of the wire and before winding it into a coil. The method is characterized in that rolling is carried out to form the date part using rolls, and the date part forming hole and the empty passage groove of the wire main body are deflected and partially communicated on the opposing circumferential surfaces of the rolls. This is done using the items listed in the table.

(Problem to be Solved by the Invention) However, in the above method, the passing speed of the wire rod body is not reduced to a speed suitable for date work, so the wire rod body is distributed at high speed for kissing the tail end, for example. It is necessary to perform date work on a line that is deflected from the center of the rolling line by installing a turnout, and the structure is complex, and
It was difficult to control the date position.

For example, for a wire with a diameter of φ12, the rolling speed is 18
m/sec, and if you want to start kissing from the position of 300 dragons on the tail end, if there is an operating error of 0.1 seconds to the aim, it will be an error of 1.8 m, and you will either miss and fail. Alternatively, the date part and original diameter will be repeated from the 2.1m position.

Therefore, if you want to add a date with an error of ±100mm to a date length of 300mm, ±01006 (100/1
It is necessary to carry out the operation error within 8,0OO=0.006) seconds.

In addition, the roll of the date rolling mill uses mold holes with different dimensions in the circumferential direction, and among these, the position of the mold hole for the mouth is 300 mm from the tail end of the wire main body. It is necessary to control the rotation of the rolls so that the rotation of the rolls occurs, but this control is extremely difficult.

For the above-mentioned reasons, it is nearly impossible to perform a date operation using the date method proposed in Japanese Patent Publication No. 60-28563 on high-speed rolled materials (13 to 18 m/5ee).

The present invention aims to provide a date method that can solve the above problems.

(Means for Solving the Problems) The present invention allows the wire rod after finish rolling to be sent to a predetermined winder among a plurality of winders provided downstream of each wire rod via a branch. This is a method for gluing hot rolled wire rods, the gist of which is to guide the wire rod, to gradually decelerate it at the end of winding, and to latch one end of the terminal end of the sufficiently decelerated wire rod before winding.

(Function) According to the present invention, one wire rod rolling line is provided with a plurality of winders, and each wire rod is guided to a predetermined winder among the plurality of winders via a branch. , the speed is sequentially decelerated at the end of winding, and one end of the sufficiently decelerated wire is rolled to be kissed before winding, so there is no need for a high-speed distribution switch, and the date position It can also be controlled reliably.

(Example) The present invention will be described below based on an example shown in the accompanying drawings.

FIG. 1 shows an example of continuous wire rolling equipment for carrying out the method of the present invention, in which billets heated to a required temperature in a heating furnace 1 are passed through a rough rolling mill group, an intermediate rolling mill group, and a finishing rolling mill group. The wire rod is rolled into a wire rod having a predetermined size and cross-sectional shape in a wire rod rolling line 2, and then guided to a predetermined winding a4 via a brancher 3 and wound into a coil shape.

Therefore, in the present invention, the wire rod which has been subjected to the predetermined rolling is first guided to the first winder 4' by the brancher 3. After the tail end of the wire passes through the branch 3, the speed of the wire is gradually reduced.

By doing this, for example, the output of the drive motor of the 3-ton winding machine is 500 KW, the J speed time is 6 seconds, the distance from the turnout 3 to the winding machine 4 is 50 m, and the maximum rolling speed is 13 m//.
sec, when the tail end of the wire approaches the inlet of the winder 4, the conveyance speed of the wire becomes almost zero, so that the date operation can be done easily and accurately.

Further, by decelerating the wire after passing through the branch 3, there is an additional effect that the cycle time can be shortened compared to starting deceleration after the tail end of the wire is wound up by the winder 4.

In addition, it is preferable that the said deceleration time is made into the time which decelerates by the highest deceleration torque which the drive motor of the winding machine 4 can produce.

In addition, this deceleration operation is performed by the winder @ 4 and the pinch roll 5 which is disposed immediately upstream thereof and assists in feeding the wire into the winder 4 after the tail end of the wire leaves the wire rolling line 2. This is done by synchronizing.

Then, the tail end of the wire rod, which has been decelerated as described above, is rolled by a coating machine 6 installed further upstream of the pinch roll 5 disposed immediately upstream of the winding machine 4, and the required coating is achieved by performing the operation. I will do it.

By the way, the roll 7 provided in the forming machine 6 is, for example, a roll 7 that forms a mold hole 8 as shown in FIG.
You can use . That is, this roll 7 is 1/2~
By making one rotation, a date portion 10 consisting of a tapered portion and a narrow diameter portion can be formed on a required length portion of the wire 9.
A substantially semicircular hole is formed in the roll 7 so that the width and depth of the mold hole 8 gradually become narrower from the beginning to the end.

The position of the roll 7 is adjusted in advance so that the head and main body of the wire rod 9 pass through such a cross-sectional part of the roll 7 (see FIG. 2 (B) and FIG. 3 (D)). The tail end has a mouth a
6, for example, a signal is received from a pulse calculator provided on the pinch roll 5 to start the roll 7, and cross sections A, B, and C of the roll 7 (FIG. 2 (B) and FIG. 3 (A)) are activated. , (b), (c)), and the fourth
We get the date shape shown in the figure.

On the other hand, when the tail end of the leading wire 9 passes through the turnout 3, the turnout 3 is activated to guide the next trailing wire 9 to the second winder 4''. The winder 4'' winds up the preceding wire rod 9 for which the above-mentioned fabrication work has been completed.
Stop, take out the coil, and restart.

Repeat the above operations.

In addition, if the time required for stopping the winding machine 4, taking out the coil, and restarting the winding machine 4 is long, the number of winding machines 4 may be set to three. Further, it is preferable that the date machine 6 is provided as close to the entrance of the winding a4 as possible. Furthermore, the gating method is not limited to rolling as in this embodiment, but may also be a forging method.

(Experimental Results) The method of the present invention was carried out in a continuous wire rolling facility as shown in FIG. 1, which is equipped with two winders for one wire rolling line. In this experiment, a wire rod with a diameter of φ13 was used at a speed of 18 m/sec.
The wire was rolled at a speed of c, and at the same time a detector installed in the branch detected the tail end of the wire, a signal was output to the motor of the winding machine to start deceleration. Then, after receiving a signal from the pulse calculator installed on the pinch roll that the tail end was approaching the date device, the date setting device was activated and the date could be set within an error of ±2011.

In addition, the conveyance speed of the tail end of the date machine is 0.2 m/s.
It was ec.

(Effects of the Invention) As explained above, the present invention provides a single wire rod rolling line with a plurality of winding machines, and a predetermined one of the plurality of winding machines for each wire rod via a branch. Since the wire is guided to the winding machine while being gradually decelerated, and one end of the wire rod that has been sufficiently decelerated is rolled to be kissed before winding, there is no need for a high-speed distribution switch, and the date position can be controlled. This invention has a great effect in that it can also be carried out reliably.

In this embodiment, the case where the tail end of the wire rod is kissed has been described, but the present invention is not limited to this. As shown in FIG. Of course, this is a good thing. In other words, by kissing at such a position, since there are usually defects such as surface flaws on the tail end, it is possible to eliminate the defective part, and it is also possible to use the tail end as a sample for inspection. This has the additional effect of

[Brief explanation of drawings]

The drawings are explanatory diagrams of the method of the present invention, FIG. 1 is a schematic diagram of continuous rolling equipment for wire rods for carrying out the method of the present invention, and FIG. 2 shows rolls equipped in a date machine. is a front view showing the main parts, (b) is a cross-sectional view of (a), and Fig. 3 (
A) is a cross-sectional view of A in Figure 2 (b), (b) is a cross-sectional view of B, (c) is a cross-sectional view of C, (d) is a cross-sectional view of D, and Figures 4 and 5 are cross-sectional views. FIG. 2 is a wire rod rolling line, 3 is a branch, 4 is a winder, 5 is a pinch roll, 7 is a roll, and 9 is a wire rod.

Claims (1)

[Claims] (1) Guide the wire rod after finish rolling to a predetermined winder among a plurality of winders installed downstream of the wire rod via a branch, and sequentially decelerate the wire rod at the end of winding, A method for gazing hot-rolled wire rods, characterized by gazing one end of a sufficiently decelerated wire rod before winding.