JP2832128B2 - Front and rear end control method for wire winding machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front and rear end control method for a wire winding machine. More specifically, when a wire of a predetermined length passed through a hot continuous wire rolling line is passed through a finishing mill and a winder to form a coil, thereby forming a ring-shaped bundle convenient for storage and transport. The present invention relates to a method for operating the above-mentioned winder.

[0002]

2. Description of the Related Art As shown in FIG. 5, a general winding line includes a finishing mill 1, a water-cooling box 2, a pinch roll 3, and a winder (loop layer) 4.
The billet heated to the rolling temperature in the heating furnace is rolled to a predetermined wire diameter by about 20 continuous rolling mills, and the obtained wire 5
Is guided to the finishing mill 1. The wire 5 finished to a predetermined wire diameter by the finishing mill 1 is cooled to a predetermined temperature in a water-cooling box 2, is pinched by a pinch roll 3, and is wound up by a winder 4.
Sent to. Then, it is formed into a coil shape by the winder 4 and taken out while falling down so as to partially overlap the conveyor 6 on the outlet side. Further obtained coiled wire rod
5a is conveyed while being cooled on the conveyor 6, and is finally assembled into a cylindrical shape by an accumulating device and bound to form a product.

When the wire 5 is wound into a ring shape by the winder 4 in the wire rolling line, if the material passing speed is extremely high as shown in FIG. 5c is distorted shape and often not the correct ring. Also, the rear end 5c tends to have a small diameter. Among such problems, as for the problem that the rear end 5c of the wire 5a becomes small in diameter, for example, the pinch pressure of the pinch roll 3 is adjusted, or the pinch roll 3 and the pinch roll 3 just before the rear end of the wire 5 enters the pinch roll. 7, the rotation of the winder 4 can be temporarily increased as shown in FIG. 7 and the traveling drive force after the winder 4 has been separated from the pinch roll 3 can be eliminated by applying the driving force in advance. -3576).

[0004]

However, in the conventional operating method, even if the rear end can be prevented from being reduced in diameter,
The disturbance remains. Also, the disturbance at the tip cannot be solved. For this reason, the problem that these irregularities in the shape of the front and rear ends adversely affect subsequent transportation (such as catching on a roller conveyor) and secondary processing has not been solved. In addition, the ring-shaped wires conveyed in an overlapped manner may be conveyed to one side on the conveying surface of the conveyor, and the tip of the coil-shaped wire protrudes sideways during the conveyance, and furthermore, is oriented in the conveying direction. And it easily catches on the side wall member of the conveyor. Therefore, it is necessary to position the leading end of the ring-shaped wire obliquely or rearwardly with respect to the transport direction so as not to come into contact with the conveyor or the like (discharge position), but if the operation speed is high, the position correction control must be performed in a short time. Therefore, it is difficult to control the leading-edge emission position of the formed coil-shaped wire.

It is an object of the present invention to prevent the front and rear ends of the wire rod from being disturbed in a wire rod winding process operated at a high speed, and to facilitate control of a discharge position.

[0006]

SUMMARY OF THE INVENTION A leading and trailing end control method for a wire winding machine according to the present invention is a leading and trailing end control in a wire winding machine for forming a wire bundle of a predetermined length passing through a wire rolling line into a ring-shaped bundle. A method in which the finishing mill and the winding machine are operated at a low speed until the tip of the wire enters the finishing mill and leaves the winding machine, and is operated at a high speed during the rolling of the intermediate portion of the wire, When the rear end reaches the finishing mill, it is operated again at a low speed.

[0007]

As described above, in the high-speed rolling, the ring shape is easily disturbed at the leading end and the trailing end of the wire, and is less disturbed in the intermediate portion. However, in the case of low-speed rolling, a ring having a relatively stable front and rear end and a correct shape is formed. In the present invention, focusing on this, high-speed rolling is performed when the intermediate portion of the material is formed in a ring shape by the winder, and when the leading end and the rear end pass through the winder, the winder, finishing is performed. The operation speed of mills and their ancillary equipment is reduced to create conditions at low speed rolling. This makes it possible to prevent the front and rear ends of the wire rod from being disturbed without significantly lowering the overall speed of the high-speed rolling, and to easily control the discharge position.

[0008]

Next, an embodiment of a control method according to the present invention will be described with reference to the drawings. FIG. 1 is a graph showing a speed control pattern of a winder according to an embodiment of the present invention, FIG. 2 is a schematic layout diagram showing an example of a winding line in which the method of the present invention is employed, and FIG. FIG. 4 is an explanatory view showing the configuration of the winder, and FIG. 4 is an explanatory view showing a coiled wire obtained by the method of the present invention.

First, a winding line to which the method of the present invention is applied will be described with reference to FIG. The configuration and operation of the winding line A in FIG. 2 are basically the same as those of the conventional one (see FIG. 5). That is, the finishing mill 1, the water-cooling box 2, the pinch roll 3, the winding machine 4, and the conveyor 6 are arranged in this order. Further, the driving speed of the finishing mill 1, the pinch roll 3, and the winding machine 4 is controlled by a control device (controller) 7 so as to have a constant ratio according to a rolling ratio or the like.

The feature of this winding line A is that the finishing mill 1
A first sensor 8 for detecting the front and rear ends of the wire 5 is provided on the front end or outside thereof, and a second sensor 9 for detecting the front and rear ends of the wire 5 is also provided on the exit side of the winding machine 4. A control mechanism for receiving and processing signals from these sensors 8 and 9 and switching the operating speed of the finishing mill 1 and the winder 4 is incorporated in the control device 7.

As the sensors 8 and 9, various types such as a photoelectric tube type, a magnetic type, and a capacitance type can be adopted. As shown in FIG. 3, the winding machine 4 has a guide 10 composed of a helical pipe whose pitch gradually decreases and whose radius gradually increases, and a central axis corresponding to the traveling path of the wire 5. And a machine frame 12 for rotating around 11
12 is rotated by a motor. Reference numeral 13 in FIG. 3 is a guide for smoothly entering the wire into the winding machine.

Next, a method of operating the winding line A will be described with reference to FIGS. Tip Winding Step I When the tip of the wire 5 sent from the hot rolling line is detected by the first sensor 8 in front of the finishing mill 1, the winding machine 4
Operates at the operating speed V at the speed V1 at the time of low-speed rolling. At this time, the pinch roll 3 and the finishing mill 1 are also operated at a predetermined speed corresponding thereto. In the following cases, the tuning operation is performed similarly. The speed V1 at the time of low-speed rolling is, for example, about 1000 to 1160 rpm in the case of a wire having a wire diameter (diameter) of 4 to 7 mm.
Corresponds to 70m / sec. The low-speed operation is continued until the second sensor 9 detects that the leading end of the wire 5 is wound by the winder 4 and comes out in a loop from the rear side.
In the above example, this time is on the order of 0.7 to 0.8 seconds. After the detection by the second sensor 9, it is preferable to continue the processing for some further time by a timer or the like in order to process 10 m (3 turns) at the tip.

Transition Step II After the leading end winding step, the operating speed V of the winding machine 4 gradually increases. This is for smoothly shifting to the high-speed operation in the next intermediate winding step. The transition process is usually 4-5
On the order of seconds.

Intermediate Part Winding Step III Next, the operation speed V of the winder 4 is set to V2 at the time of high-speed rolling, and the intermediate part is continuously formed into a coil at a high speed.
This speed V2 is about 1600 to 2000 rpm in the above example.
This time varies depending on the total length of the wire 5.

Transition Step IV When the rear end of the wire 5 is detected by the first sensor 8, the operating speed V of the finishing mill 1 and the winding machine 4 gradually decreases to the low speed operating speed V1 again. This transition step is usually about 4 to 5 seconds.

Rear End Winding Step IV At the low operating speed, about 10 m of the rear end of the wire 5 is formed into a loop by the winder 4. When the second sensor 9 detects that the trailing end has come out of the winding machine 4, the winding machine 4 idles until the next wire enters. This is the billet gap B. The rear end winding step V is usually about 0.15 to 0.2 seconds, and the billet gap B is about 3 to 5 seconds.

As described above, in the present embodiment, the wire 3 is wound at a low speed for 3 to 5 turns at the front end and 3 to 5 turns at the rear end, so that the loop shape becomes a substantially circular correct shape. As shown in FIG. 4, a wire 5a having a correct coil shape without deformation and a bundle thereof are obtained. Moreover, since the intermediate portion is wound at a high speed, the overall processing time hardly decreases. By the way, when forming a general 3000-3500 winding loop,
The time required for the leading end winding step and the trailing end winding step is 8 to
10%. Therefore, it takes only about 4 to 5% extra time as compared with the case where the whole is operated at high speed.

Although the preferred operation example of the winder 4 has been described above, the method of the present invention is not limited to the above embodiment. For example, the transition steps II and IV can be made smoother, or the speed ratio between the low speed and the high speed can be further increased.

[0019]

According to the front / rear end control method of the present invention, the following effects can be achieved. When the leading end of the wire rod enters the finishing mill, the speed is not high, so that the run-out of the wire rod is small, and the possibility of occurrence of misroll such as jamming is reduced. When the tip of the wire is wound by the winder, the speed is not high, so that a stable ring can be easily formed. Further, it becomes easy to control the discharge position of the tip of the formed coiled bundle. When the rear end of the wire is wound, it is not fast,
Stable ring formation is easy. The above can be achieved without greatly reducing the production capacity (production speed) of the equipment.

[Brief description of the drawings]

FIG. 1 is a graph showing a speed control pattern of a winder according to an embodiment of the present invention.

FIG. 2 is a schematic layout diagram showing an example of a winding line in which the method of the present invention is adopted.

FIG. 3 is an explanatory diagram of a configuration of a winder of FIG. 2;

FIG. 4 is an explanatory view showing a coiled wire obtained by the method of the present invention.

FIG. 5 is a schematic layout diagram showing an example of a conventional winding line.

FIG. 6 is a perspective view showing an example of a coiled wire obtained by a conventional winding line.

FIG. 7 is a graph showing an example of a speed control pattern of a conventional winding machine.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Finishing mill 2 Water cooling box 3 Pinch roll 4 Winding machine 5 Wire rod 6 Conveyor 7 Control device 8 1st sensor 9 2nd sensor 10 Guide 11 Pass line 12 Machine frame 13 Guide A Winding line I Front end winding process III Middle part Winding process V Rear end winding process

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-61-33714 (JP, A) JP-A-51-123755 (JP, A) JP-A-50-129453 (JP, A) JP-A 50-129453 112256 (JP, A) JP-A-58-209419 (JP, A) JP-A-1-178315 (JP, A) JP-A-63-154215 (JP, A) JP-A-59-107723 (JP, A) JP-A-53-99057 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) B21C 47/02 B21C 47/14

Claims (1)

(57) [Claims] 1. A method for controlling a leading end and a trailing end in a wire winding machine for forming a wire bundle of a predetermined length through a wire rolling line into a ring-shaped bundle, the winding being performed after the leading end of the wire enters a finishing mill. Operate the finishing mill and winder at a low speed until they exit the winding machine, operate at a high speed during the rolling of the middle part of the wire, and operate again at a low speed when the rear end of the wire reaches the finishing mill. A method for controlling the front and rear ends of a wire rod winding machine.