JPH08215751A - Coil diameter controller in laying coiler - Google Patents

Abstract

PURPOSE: To provide a coil diameter controller in a laying coiler which precisely and highly responsibly control respective operations of the acceleration and step-down without enlarging the driving system and which can satisfactorily control the coil diameters. CONSTITUTION: In a laying coiler, a movable shell 17 which increases or decreases the cross-sectional area of the wire passing path is provided in a spiral cylinder like wire guide 15. Further, a shell moving means composed of a hydraulic system, etc., which adjusts the wire passing resistance by moving the movable shell 17 to change the cross-sectional area of the path is provided, and wobbling and the tail end treatment can be controlled without changing the velocity of the driving system of wire coiler.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laying type wire rod winding machine, and more particularly, when a product wire rod is passed through a spiral cylindrical wire rod guide to form a coil, the wire rod track of the wire rod guide is broken. The present invention relates to a coil diameter control device for a laying-type wire rod winding machine that controls the diameter of a coil to be wound by changing the area.

[0002]

2. Description of the Related Art As a typical prior art of a wire winding machine used in a refining process of wire rolling equipment, Japanese Patent Laid-Open No.
An example is a laying type wire rod winding machine (laying reel) disclosed in Japanese Patent Publication No. 92869. In this prior art, referring to FIG. 1 of the publication, a wire rod guide 30 that discharges a rolled wire rod 32 introduced into a hollow shaft 22 that is driven to rotate around a shaft core with a coil having a predetermined coil diameter, and the wire rod guide 30. Guide 30
A space 35 that is formed between the discharge end 30B and the landing surface 34 for forming the conical orbit 33 of the rolled wire rod 32 in a non-contact manner, and a cylindrical body 36 that surrounds the side periphery of the space 35. It is well known that the structure is such that coiling is performed by passing the rolled wire rod 32 through the wire rod guide 30.

In this case, the diameter of the coil to be discharged is controlled by the following method. , Wobbling control: The coil diameter is controlled by changing the driving speed of the laying reel up and down with respect to a reference value, and thereby, for example, the filling rate of the coil fed onto the conveyor is raised or lowered. , Tail end acceleration control:
When the wire rod is thick, its tail end passes through a mill or pinch roll, so the linear velocity is small and the kinetic energy is small.Therefore, the resistance of the guide tube that guides the wire rod and the resistance of the wire rod guide cause the wire rod feeding line to move. It is difficult to pull out. Therefore, when passing through the line without speed control, the tail end portion remaining on the laying reel from the mill exit side becomes smaller than the reference coil diameter due to the influence of the line resistance. In order to improve this, the product is accelerated after the tail end has passed through the mill, and control is performed so as to secure the reference coil diameter. ， Step-down control: When the wire is thin, the linear velocity is large and the kinetic energy is large. Therefore, when the tail end comes out of the pinch roll, the centrifugal force of the laying reel is also added and discharged to the conveyor. The diameter of about 1 ring is larger than the reference coil diameter. In order to suppress this, when the tail end corresponding to one ring remains on the laying reel, the speed of the line is reduced to control the diameter of the reference coil.

[0004]

In the above-mentioned conventional tail end processing and coil diameter control by wobbling, the speeds of the laying reel and the pinch roll are controlled, so that the drive system for them is enlarged. There is. That is,
The output of the reel motor is governed by the required acceleration torque for wobbling, and in the case of pinch rolls, the required acceleration torque for tail end processing, and as a result, the drive system becomes larger. On the other hand, in the case of the tail end step-down, the deceleration control must be performed in a minute time of about 0.1 to 0.2 seconds, and it is difficult to secure a desired tail end coil shape in terms of responsiveness. is there.

The present invention has been made in order to solve such problems, and an object of the present invention is to achieve high control of acceleration and step-down without increasing the size of the drive system. It is an object of the present invention to provide a coil diameter control device for a laying-type wire rod winding machine, which can be performed with high accuracy and high responsiveness, and can manage the coil diameter perfectly.

[0006]

The present invention has the following configuration to achieve the above object. That is, according to the present invention, a wire rod introduced into a hollow shaft is passed through a spiral cylindrical wire rod guide that is provided so as to rotate in a conical orbit that expands in the lead-out direction, is shaped into a ring, and is then discharged. In the laying type wire rod winding machine, a wire rod guide having a movable shell in the spiral cylinder portion for increasing or decreasing the track cross-sectional area orthogonal to the axis of the track space through which the wire rod moves, and the movable shell is moved to change the track cross-sectional area. A coil diameter control device for a laying type wire rod winding machine, comprising: a shell moving means for adjusting a wire rod passage resistance.

In the coil diameter control device of the present invention, the wire rod guide is attached to the outer peripheral surface of the truncated cone-shaped cone head, and the movable shell is movably provided so as to come in contact with and separate from the outer peripheral surface of the cone head. It is characterized in that the means comprises a hydraulic actuator provided across the movable shell and the cone head, and a hydraulic line including an electromagnetic control valve and connected to the hydraulic actuator.

According to the present invention, in the above coil diameter control device, the movable shell of the wire rod guide is disconnected from the steady position during the wobbling control to the large diameter side and the tail end processing in accordance with the operation of the shell moving means. It is characterized in that the wobbling control to the smaller diameter side and the step down control to the area increasing side are moved from the steady position to the track cross sectional area decreasing side, respectively.

[0009]

According to the present invention, a wire rod guide including a movable shell for increasing or decreasing a track cross-sectional area orthogonal to an axis of a track space through which the wire rod passes, and a wire rod passing resistance for moving the movable shell to change the track cross-sectional area. A coil diameter control device is formed by the shell moving means for adjusting the coil. The wire rod guide is attached to, for example, the outer peripheral surface of a truncated cone-shaped cone head, and the movable shell is movably provided so that the movable shell can come into contact with and separate from the outer peripheral surface of the cone head. It is formed by a hydraulic actuator such as a piston cylinder and a hydraulic line that reversibly operates the hydraulic piston cylinder by operating an electromagnetic control valve.

According to the present invention as described above, in order to perform wobbling control to the large diameter side and tail end processing, the hydraulic piston cylinder is operated to move the movable shell in a direction away from the outer peripheral surface of the cone head. This substantially increases the spiral diameter of the wire rod guide and reduces the wire rod passage resistance, and as a result, the coil diameter of the wire rod discharged from the wire rod guide while maintaining the rotation speed of the laying reel at a predetermined rotation speed. Can be prevented from becoming small.

Further, according to the present invention, when performing wobbling control or step-down control toward the small diameter side, the spiral diameter of the wire rod guide is substantially changed by moving the movable shell in a direction closer to the outer peripheral surface of the cone head. As a result of the decrease and the increased wire rod resistance, it is possible to prevent the coil diameter of the wire rod discharged from the wire rod guide from increasing.

Since it is only necessary to control the movement of the movable shell in this way, the drive system can keep the motor output to a minimum, achieve compactness, and consume less power. Further, the operation of the coil diameter increase / decrease control in this case can be realized with high responsiveness by utilizing the hydraulic system, and moreover, the timing control based on the prospective prediction in consideration of the operation delay time is possible. It can be operated without delay for a minute time of about 0.1 seconds, and the coil diameter can be controlled quickly and accurately.

[0013]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 is an elevational view showing a partial vertical cross-section of a main part of a laying reel according to an embodiment of the present invention, and FIG. 2 is an enlarged plan view of a wire rod guide shown in FIG.
3 is a schematic structural diagram of a coil diameter control device shown in a sectional view taken along the line AA of FIG. 2, and FIG. 4 is a schematic process diagram of a wire rod rolling facility using the laying reel shown in FIG. . As shown in the process diagram of FIG. 4, the laying reel 1 according to the embodiment of the present invention is, for example, a horizontal reel.
Finishing mill final stand 2, guide tube 3 and pinch roll 4
The wire rod 6 that has sequentially passed through is introduced through an inlet guide (not shown). The structure of the main part of the laying reel 1 will be described later, but the wire rod 6 continuously formed into a coil having a predetermined diameter in the reel is discharged onto the laying conveyor 5 and partially overlapped and tilted. It is cooled in the process of being conveyed in the state.

The structure of the laying reel 1 will be described with reference to FIG. 1. A front housing 8 and a rear housing 9 are provided.
Are fixed to the front and rear positions of the fixed pedestal 7, respectively, and a hollow shaft 10 is provided in the front housing 8 with its axis substantially horizontal. The hollow shaft 10 is rotatably supported around the shaft center by a bearing 11 on a front side bearing (not shown), and further, a ring head 12 coaxially and integrally attached to the distal end of the hollow shaft 10 has a rear side bearing 11. It is rotatably supported around the axis. On the other hand, a cone-shaped conical head 13 is housed in the rear housing 9 and is integrally fixed to the end of the ring head 12 by a bolt so that it can rotate integrally with the hollow shaft 10 coaxially. Is formed.

Inside the tip of the hollow shaft 10 and the ring head 12.
A wire rod guide tube 14 realized by a metal pipe is attached inside. This wire rod guide tube 14 is formed as a curved pipe that expands in the lead-out direction of the wire rod to be inserted therein, the pipe inlet is substantially aligned with the axis of the hollow shaft 10, and the pipe outlet is on the peripheral surface of the cone head 13. Along the side, it is fixed to the hollow shaft 10 and the cone head 13.

A wire rod guide 15 is provided on the peripheral surface of the cone head 13 so as to be connected to the wire rod guide tube 14. The wire rod guide 15 is fixed along the peripheral surface of the cone head 13 so as to form a conical orbit that expands in the lead-out direction of the wire rod inserted inside. The wire rod guide 15 is shown in FIGS.
As shown in FIG. 3, a liner is formed by joining a plurality of, for example, four guide members into a series of guide mechanisms, and each guide member is fixed along the peripheral surface of the cone head 13. Shell 16 and this liner shell 1
6 and a movable shell 17 which is attached so as to be able to approach and separate from each other. Liner shell 16
Is made of a narrow plate material and is fixed to the cone head 13 by bolts. On the other hand, the movable shell 17 has a cross-sectional shape perpendicular to the longitudinal axis of the liner shell 16.
The through-holes at the corners of the four corners are slidably loosely fitted to the guide bar 18 which is a concave rod which can be fitted in the concave and convex portions and which is fixed to the cone head 13 by screwing and is made upright. And the movable shell 1 provided in this way
7 is movably attached to the cone head 13 while being parallel to the liner shell 16 and capable of approaching and separating.

Further, hydraulic actuators 19 are provided on both sides of the center of the movable shell 17 in the longitudinal direction. The hydraulic actuators 19 include a first hydraulic piston 20 on the rod side and a second hydraulic piston 21 on the head side. It is composed of two hydraulic pistons including two hydraulic pistons, and is provided between the movable shell 17 and the cone head 13. The double hydraulic piston 19 is housed in the movable shell 17 with the cylinder body having its axis parallel to the guide bar 18, and fixes the rod side cylinder cover 22 and the head side cylinder cover 23 to the movable shell 17, while The rod of the first hydraulic piston 20 is fixed to the cone head 13 by screwing. As shown in FIG. 3, between the stroke Y of the first hydraulic piston 20 and the stroke X of the second hydraulic piston 21, X <Y.
The strokes of the both 20 and 21 are determined so that the relationship of

The hydraulic line connected to the double hydraulic piston 19 includes a hydraulic power source P, a tank T, a three-position type first electromagnetic control valve 24, a two-position type second electromagnetic control valve 25, and a pilot operation check valve. A valve 26, a check valve 27, and hydraulic lines connecting them and the double hydraulic piston 19 are provided, and are connected to each other as shown in FIG. A shell moving means for moving the movable shell 17 is formed by the hydraulic line and the double hydraulic piston 19. The shell moving means selectively actuates the first hydraulic piston 20 and the second hydraulic piston 21 by energizing and de-energizing the solenoids SolA, B, C, D of the electromagnetic control valves 24, 25. It is possible to move the movable shell 17 to three positions of the steady position N, the lower limit position L, and the upper limit position U. In this case, the solenoids SolA, B,
The relationship between the excited and non-excited states of C and D and the position of the movable shell 17 is as shown in Table 1 below.

[0019]

[Table 1] Note: ○ indicates excited state, blank indicates non-excited state,

The pilot operated check valve 26 is provided to prevent pressure oil from flowing backward from the head side chamber of the second hydraulic piston 21 to the second electromagnetic control valve 25. The control valve 24 is forcibly opened when the SolA is excited.

The configuration of the coil diameter control device of the present embodiment is as described above. Next, the operation mode of this coil diameter control will be described. , During wobbling control to the large diameter side and tail end processing:
The first electromagnetic control valve 24 is operated to the b position by SolB excitation, and the second electromagnetic control valve 25 is operated to the c position by SolC excitation. As a result, the movable shell 17 moves to the upper limit position U farthest from the cone head 13, the track cross-sectional area through which the wire rod 6 passes increases, and the wire rod passing resistance decreases, so that the rotation of the laying reel 1 is not changed. It is possible to prevent the coil diameter of the wire rod 6 discharged from the wire rod guide 15 from decreasing while maintaining the predetermined rotation speed.

During wobbling control toward the small diameter side and step-down control: the first electromagnetic control valve 24 is SolA.
The second electromagnetic control valve 25 operates to the a position by the excitation and the S
Activating to d position by olD excitation. As a result, the movable shell 17 approaches the cone head 13 to the lowest position L.
Since the track cross-sectional area through which the wire rod 6 passes is reduced and the wire rod passage resistance increases, the wire rod 6 discharged from the wire rod guide 15 is kept at a predetermined rotation speed without changing the rotation of the laying reel 1. It is possible to prevent the coil diameter from increasing.

During normal steady operation: First electromagnetic control valve 2
4 is operated to the n neutral position by the non-excitation of SolA and SolB, and the second solenoid control valve 25 is c by the SolC excitation.
Operates in position. Therefore, the movable shell 17 stabilizes at the steady position N between the upper limit position U and the lower limit position L, and the wire 6
The cross-sectional area of the orbit passing through is maintained at a desired constant value, and coils of the same diameter are continuously discharged.

Although the electromagnetic control valves 24 and 25 used in the above-described embodiments are electromagnetic directional control valves, the electromagnetic control valve according to the present invention may of course be a proportional electromagnetic valve. However, if a proportional solenoid valve is used, it is possible to finely control the coil diameter in consideration of the change in sliding resistance with respect to the wire rod, that is, the tail end of the product is guided after passing through the finishing mill. Since the contact length with the pipe changes from moment to moment, it becomes possible to adjust the sliding resistance correspondingly. Therefore, such a modification is also a preferable mode and can be optionally adopted as needed. Good.

[0025]

According to the present invention, since the movable shell provided in the wire rod guide is moved to change the track cross-sectional area and the wire rod passing resistance is adjusted, the prime mover acceleration and wobbling for tail end treatment can be performed. The operation of accelerating and decelerating the prime mover for control is unnecessary, and as a result, the motor output of both the laying type wire rod winding machine and the pinch roll is reduced, and the drive system can be made compact. Further, accordingly, the power consumption can be reduced and the running cost can be reduced.

Further, according to the present invention, by moving the movable shell by a hydraulic system, it is possible to move the shell with high responsiveness, and the conventional acceleration / deceleration system takes time to rise at the time of control. However, the dead time can be reduced to a negligible amount, which contributes to the improvement of product quality. Further, since the expected control considering the operation delay time is possible, it is possible to easily perform fine coil control in which the control target of several turns at the tail end is accurately captured.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional elevational view of a main part of a laying reel 1 according to an embodiment of the present invention.

FIG. 2 is an enlarged plan view showing a wire rod guide 15 in the embodiment shown in FIG.

3 is a cross-sectional view taken along the line AA of FIG. 2 and is a schematic structural view of a coil diameter control device in the embodiment shown in FIG.

FIG. 4 is a schematic process diagram of a wire rod rolling facility in which the laying reel 1 shown in FIG. 1 is used.

[Explanation of symbols]

 1 ... Raying reel 6 ... Wire rod 7 ... Fixed mount 8 ... Front housing 9 ... Rear housing 10 ... Hollow shaft 11 ... Bearing 12 ... Ring head 13 ... Cone head 14 ... Wire rod guide tube 15 ... Wire rod guide 16 ... Liner shell 17 ... Movable shell 18 ... Guide bar 19 ... Double hydraulic piston 20 ... First hydraulic piston 21 ... Second hydraulic piston 22 ... Cylinder cover 23 ... Cylinder cover 24 ... First electromagnetic control valve 25 ... Second electromagnetic control valve 26 ... Pilot Operation check valve

Claims (3)

[Claims] 1. A wire rod introduced into a hollow shaft is passed through a spiral-cylindrical wire rod guide provided so as to rotate in a conical orbit that expands in the lead-out direction, shaped into a ring, and then discharged. In a laying-type wire rod winder, a wire rod guide having a movable shell in a spiral cylinder part for increasing or decreasing an orbital cross-sectional area orthogonal to an axis of an orbital space through which the wire rod passes, and the movable shell is moved to change the orbital cross-sectional area. A coil diameter control device for a laying type wire winding machine, comprising: a shell moving means for adjusting a wire passing resistance. 2. A wire rod guide is attached to an outer peripheral surface of a truncated cone-shaped cone head, and a movable shell is movably provided so as to come into contact with and separate from the outer peripheral surface of the cone head, and shell moving means is provided between the movable shell and the cone head. The coil diameter control device for a laying-type wire winding machine according to claim 1, comprising a hydraulic actuator provided over the hydraulic actuator and a hydraulic line including an electromagnetic control valve and connected to the hydraulic actuator. 3. A movable shell of a wire rod guide, in accordance with the operation of a shell moving means, performs wobbling control to a large diameter side and wobbling to a small diameter side from a steady position to a track cross-sectional area increasing side during tail end processing. The coil diameter control device for a laying-type wire rod winder according to claim 2, wherein the coil diameter control device is moved from the steady position to the track cross-sectional area reduction side during the control and the step-down control.