JP2003073032A - Wire rod take-up device and laying head used in the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire rod take-up device of low noise, having a wire rod guide capable of preventing a wire rod from being frictionally scratched and improving its shelf life, and a laying head in linear material rolling facilities. SOLUTION: The electric current is applied to the wire rod 17 passing through the laying head 1, the solid contact force between the wire rod guide 20 and the wire rod 17 is reduced by magnetic flux in the wire rod guide 20 to reduce the friction, and the wire rod guide 20 is rotated in a vacuum box 71.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire rod winding device for wire rod rolling equipment.

[0002]

2. Description of the Related Art A conventional wire rod winding device uses a laying head having a rotating spiral wire rod guide for winding a wire rod. The wire rod comes into direct contact with the wire rod guide of the laying head, and the wire rod is decelerated by the solid contact force between the wire rod and the wire rod guide for winding.

[0003]

In the conventional wire rod winding device, the wire rod guide of the laying head comes into contact with the wire rod passing at a high speed, and the contacting force winds the wire rod while decelerating the wire rod. At that time, friction occurs between the wire rod and the wire guide, scratching the wire surface, and the wire guide wears quickly, which makes it easier to damage the wire. However, there is a problem that the wire rod guide disturbs the atmosphere, generates noise, and consumes power.

According to the present invention, in the laying head of the wire winding device, the direct contact force between the wire and the wire guide is reduced, wear of the wire guide is reduced, and friction scratches generated on the surface of the wire are reduced. An object of the present invention is to obtain a wire rod winding device with low noise and a laying head used for the device.

[0005]

In order to achieve the above object, in the wire rod winding device of the present invention, an electric current is passed through the wire rod, and inside the wire rod guides arranged spirally of the laying head, A magnetic field of magnetic lines of force almost perpendicular to the center of the wire is formed, and the electromagnetic force according to Fleming's left-hand rule is applied to the wire to reduce the solid contact force between the wire and the wire guide, and only the electromagnetic force or the solid contact force and the electromagnetic force By the resultant force, the wire rod guide absorbs the kinetic energy of the wire rod and transmits it to the laying head to stop winding the wire rod. In addition, the rotating part of the laying head can be placed in a vacuum box to reduce noise.

The first method for applying an electric current to the wire rod is to connect the pinch roll on the wire rod entry side of the laying head to a power source and apply a voltage, and to tilt the wire rod standing in a loop at the laying head outlet side. Ground the tripper and the pallet conveyor that cools the wire. Further, the final rolling mill is grounded, and current is passed from the pinch rolls to both the laying head side and the rolling mill side. The second method of applying an electric current to the wire is
Contrary to the above, the outlet tripper of the laying head and the pallet conveyor are connected to a power source, a voltage is applied thereto, the pinch roll is grounded, and an electric current is passed in the pinch roll direction opposite to the movement of the wire. In any of the above cases, the direction of the electromagnetic force in the wire rod guide is the direction in which the wire rod is pulled away from the inner surface of the wire rod guide.

The wire rod guides are arranged on the laying head along a spiral whose diameter gradually increases from the entrance side to the exit side. The wire rod guide has a guide pipe in its center, and the guide pipe is surrounded by positive and negative magnetic poles. The magnetic flux generated from the magnetic pole is supplied directly from an electromagnetic coil or a permanent magnet in the wire rod guide, or from a separately installed electromagnetic coil or permanent magnet by a magnetic path linked by a ferromagnetic yoke. The current supplied to the electromagnetic coil is supplied from an external power source through a slip ring provided coaxially with the hollow shaft of the laying head or from a generator provided coaxially with the hollow shaft of the laying head.

A direct current power source is usually used as the power source for the current flowing through the wire rod and the external power source used for the magnetic coil for magnetic flux created in the wire rod guide. However, except when a permanent magnet is used to create the magnetic flux of the wire rod guide, these two power supplies can be AC power supplies and their phase differences can be adjusted for use.

Usually, the rolling speed of the wire rod is high, and the wire rod at the exit of the final rolling mill has a large kinetic energy. The wire rod guide utilizing the above magnetic flux efficiently transfers this kinetic energy to the laying head with little friction loss and recovers it. However, the wire rod guide rotating at a high speed and the outer cylinder to which the wire guide is attached disturb the surrounding air and consume the recovery energy. To prevent this consumption, part of the rotating part of the laying head can be placed in a vacuum box with low air resistance. The wire rod guide is continuous,
Alternatively, it is divided into a large number, and in either case, it is mounted in a spiral shape on the inner surface of the outer tube having a substantially conical shape. The outer cylinder is placed in a vacuum box, and the vacuum box is evacuated by a vacuum pump. The outer cylinder penetrates outside at two points of the vacuum box. A labyrinth seal is provided on the penetrating portion so that outside air cannot easily enter the vacuum box. The labyrinth seal has a large number of rotating inner fins and a large number of fixed outer fins intersecting with the inner fins, and the inner fins and the outer fins form a maze to seal the atmosphere without contact. Most of the air inside the outer cylinder rotates together with the outer cylinder, and since the air resistance outside the outer cylinder is low due to vacuum, the power and noise required for air disturbance are reduced. In order to exchange the air inside the outer cylinder, there is a blower fixed to the outer cylinder and rotating on the large end surface of the outer cylinder, and the heat generated inside the outer cylinder is dissipated to the atmosphere. The method of putting the wire rod guide inside the outer cylinder and surrounding it with a vacuum box is also effective for the laying head that uses the conventional wire rod guide that does not use electromagnetic force, and reduces the power and noise required for air disturbance. Become.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described based on examples with reference to the drawings. In FIG. 1, the laying head 1 is installed after the pinch roll 2 on the output side of the wire rod rolling equipment, and the wire rod 17 is placed on the winding pallet conveyor 3. Furthermore, the wire is cooled on the pallet conveyor 3,
At the end thereof, they are piled up in the coiler 4 and collected into a coil bundle. The power source 5 is connected to the pinch roll 2, and the main current of the power source 5 is the wire rod 17 passing through the laying head 1.
To the grounded tripper 6 and the pallet conveyor 3 on the exit side of the laying head. The laying head 1, the pinch rolls 2 and all the guides 7 on the entry side thereof are insulated from the ground, and the rolling stand 91 is grounded.

FIG. 2 shows the laying head 1 of FIG.
FIG. 4 is a partial detailed view of FIG. 2 and 4,
A bearing 11 fixed to the frame 101 and a hollow shaft 13 pivotally attached to the bearing 12 are rotationally driven by a pair of bevel gears 14 and 15. The wire rod 17 enters from the inlet wire rod guide 18 into the wire rod guide 20 spirally arranged on the inner surface of the conical outer cylinder 19. The outer cylinder 19 and the central shaft 21 are coupled to the hollow shaft 13 and rotate. An electromagnetic coil 22 and an iron core 26 are attached to the central shaft 21 via a magnetic plate 34, and spacers 23, 2
4 is inset. Spacers 24 are stays 25, 3
The outer cylinder 19 is connected at 5. The power source for the current flowing through the electromagnetic coil 22 is the generator 30 that rotates coaxially with the hollow shaft 13. At the small end of the outer cylinder 19 and near the entrance of the wire rod 17,
The diameter of the outer cylinder 19 is small, the pitch of the helix in which the wire rod guide 20 is arranged is large, and as the diameter of the outer cylinder 19 increases toward the outlet, the inclination of the helix becomes gentle, and the absolute velocity of the wire rod 17 is accordingly increased. Wire rod 17
Loses kinetic energy and finally stops.

The iron cores 26 of the plurality of electromagnetic coils 22 and the wire rod guide 20 are coupled to each other via a magnetic disk 34 by a yoke 27 of a ferromagnetic material to form a magnetic path.
A magnetic field is created within 0 to apply electromagnetic force to the wire. On the large end surface of the outer cylinder 19, a blower 7 that is fixed to the outer cylinder 19 and rotates
5 to dissipate the heat generated inside the outer cylinder 19 to the atmosphere. The vacuum box 71 wraps the outer cylinder 19, and the inside is evacuated by a vacuum pump 72. The outer cylinder 19 is a vacuum box 71.
There are labyrinth seals 73 and 74 at two positions penetrating the space to prevent the atmosphere from entering the vacuum box 71.
Each of the labyrinth seals 73 and 74 has a large number of rotating inner fins and a large number of fixed outer fins intersecting with each other. The inner fins and the outer fins form a maze, and the outer cylinder 19 is a vacuum box. At a portion penetrating the opening of 71, the atmosphere is sealed without contact.

FIG. 3 is a view taken along the line AA of FIG. Bearing 1
1 and a hollow shaft 13 pivotally attached to a bearing 12 are rotationally driven by an electric motor 16 connected to a pair of bevel gears 14 and 15 and a drive shaft 36. The drive shaft 36 is pivotally mounted on bearings 29 and 39 fixed to the frame 101, and the electric motor 16 and the shaft 36 are connected by a shaft joint 37.

FIG. 5 is a sectional view taken along line BB of FIG. The magnetic plate 34 is coupled to the iron core 26, and the magnetic flux passes through the yoke 27 and reaches the wire rod guide 20. In FIG. 6, the power source of the electromagnetic coil 22 is from an external power source 84. From the external power source 84, a current is passed through a slip ring 81 rotating with a wapper 82 placed on the hollow shaft 13 to a brush 83.
2 can be supplied.

FIG. 7 shows the wire rod guide 20. FIG. 8 is FIG.
6 is a cross-sectional view taken along the line C-C of FIG. 1, and the guide pipe 41 that surrounds the wire 17 and the opposing magnetic poles N and S surround the wire 17. The guide pipe 41 is made of an electrically non-conductive material, or has an inner surface coated with an electrically non-conductive material. The hardware 42 to 44 holding the guide pipe 41 is not a ferromagnetic material and does not allow magnetic flux to pass. The magnetic path from the iron core 26 of the electromagnetic coil 22 to the ferromagnetic metal parts 46, 47 and 48 via the magnetic plate 34 and the yoke 27 is the guide pipe 41.
The magnetic poles N and S on the outer surface of the wire are discontinued, and the wire 17 in which the current is flowing passes through the discontinuity. If the direction of the current of the electromagnetic coil 22 is appropriate, an electromagnetic force in the direction of separating the wire 17 from the inner surface of the guide pipe 41 can be given by the Fleming's left-hand rule. As shown in FIG. 9, the wire rod guide 20 is attached to the outer cylinder 19 by a U bolt 45.

[0016]

Since the present invention is configured as described above, it has the following effects.

In the laying head of the wire rod winding device, an electromagnetic force is generated between the wire rod and the wire rod guide to reduce the solid contact force and reduce the scratches on the surface of the wire rod.

Further, it is possible to reduce the wear of the wire rod guide and to replace the worn wire rod guide with less downtime of the wire rod rolling equipment.

Furthermore, most of the rotating portion of the laying head rotates in the vacuum box and does not disturb the atmosphere, so that the power consumption can be reduced, and quiet operation can be performed with less noise.

[Brief description of drawings]

FIG. 1 is a drawing of a wire winding device including a laying head.

FIG. 2 is a vertical sectional view of a laying head.

FIG. 3 is a plan view taken along the line AA of FIG.

FIG. 4 is a partial detailed view of FIG.

5 is a cross-sectional view taken along the line BB of FIG.

FIG. 6 is a slip ring mounting view for supplying a current to an electromagnetic coil.

FIG. 7 is a front view of a wire rod guide.

FIG. 8 is a sectional view taken along the line CC of FIG.

9 is a view taken along the line D-D in FIG. 7 of the wire guide.

[Explanation of symbols]

1 laying head 2 pinch rolls 3 Pallet conveyor 4 coilers 5 power supplies 6 trippers 7 Guide 11, 12, 29, 39 bearings 13 hollow shaft 14, 15 bevel gears 16 electric motor 17 wire rod 18 entrance wire guy 19 outer cylinder 20 Wire rod guide 21 central axis 22 Electromagnetic coil 23, 24 spacer 25, 35 stay 26 iron core 27 Yoke 30 generator 34 Magnetic board 36 drive shaft 37 shaft joint 41 Guide pipe 42-44 hardware 45 U bolt 46-48 Ferromagnetic hardware 71 vacuum box 72 Vacuum pump 73,74 Labyrinth seal 75 blower 81 slip ring 82 Wapper 83 Brush 84 External power supply 91 rolling mill 101 frames N, S magnetic pole

Claims (7)

[Claims] 1. A pinch roll (2) and a tripper (6)
Or between the pallet conveyor (3), a current is applied to the wire (17) passing through the laying head (1), and
A wire winding device in which a magnetic field is formed in a wire guide (20) of a laying head (1). 2. A laying head for a wire winding device, wherein a magnetic field is formed in the wire guide (20) and an electric current is applied to the wire (17). 3. A magnetic field is formed in the wire rod guide (20) and an electric current is passed through the wire rod (17) to reduce the solid contact force between the wire rod (17) and the wire rod guide (20) by the generated electromagnetic force. The laying head according to claim 2, wherein 4. A generator (30) coaxial with the hollow shaft (13).
The laying head according to claim 2, wherein a magnetic field is formed in the wire rod guide (20) by using the electric current generated by the generator (30). 5. Ray according to claim 2, characterized in that a slip ring (81) coaxial with the hollow shaft (13) is placed and a magnetic field is created in the wire guide (20) using the current of an external power supply (84). Inghead. 6. A part of the rotating part through which the wire (7) passes,
A laying head which is placed in the outer cylinder (19) and further placed in the vacuum box (71). 7. A wire rod guide for a laying head, wherein a magnetic field having magnetic lines of force is formed substantially at right angles to a central axis of a wire rod (7) passing therethrough.