JP3336893B2 - Method and apparatus for winding metal strip - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for winding a metal strip having an irregular cross-section, and more particularly to a method for winding a metal strip in a thin plate portion which is free from deformation in the thickness direction during winding. And its device.

[0002]

2. Description of the Related Art As a conventional metal strip winding apparatus, for example, there is a winding apparatus disclosed in Japanese Patent Application Laid-Open No. 2-46917. The winding device includes a speed detector for detecting the speed of the long object, and an electric motor for matching the speed of the long object to a predetermined speed reference value based on the speed detection value obtained by the speed detector. Armature current control means for controlling the armature current, a tension detector for detecting the tension of a long object, and matching the tension with a predetermined tension based on the detected tension value obtained by the tension detector. To this end, a tension controller for compensating the speed reference value and a compensating output limiter for limiting the output of the tension controller are provided.

In the conventional metal strip winding device having the above configuration, a tension deviation between a detected value of the tension of the plate detected by the tension detector and a preset reference tension value is obtained. Is converted into a speed deviation in the tension controller, and the result is output to the compensation output limiter. The output value of the compensation output limiter is added to the plate speed reference value set by the plate speed setter, and the deviation between the added value and the detected speed value of the plate speed detector is obtained.The result is sent to the speed controller. Is output. The speed controller converts this deviation signal into an armature current reference value and outputs the signal to an armature current controller that controls the torque of the motor. The armature current controller controls the armature current of the motor based on the armature current reference value. The field of the motor is controlled by a field current controller that outputs a field current proportional to the coil diameter calculated by the coil diameter calculator. The field current controller generates a field that is proportional to the coil diameter, thereby making the armature current proportional to the plate tension, and controlling the armature current to keep the tension constant.

As described above, according to the conventional metal strip winding device, a change in tension due to a change in the coil diameter of the winding coil can be suppressed. Abrupt fluctuations can be suppressed, and instability of tension limitation due to a change in coil diameter can be eliminated, and stable winding and rewinding of the metal strip can be realized.

[0005]

However, according to the conventional metal strip winding device, the winding tension is constant even if the diameter of the winding coil of the winding device changes.
As shown in (a), a thick plate portion 31 having an irregular cross section and having a thick central portion with respect to the width direction and a strip-shaped thin plate portion 3 having thinner sides.
When the metal strip 3 having the metal strip 2 is wound by a winding device using a mandrel, the thin plate portion 32 of the metal strip 3 bends in the thickness direction as shown in FIG. is there. If a bend occurs in this portion, it must be corrected by a straightening device after the rewinding in order to restore the deformation, and there is a problem that the straightening work is complicated and the work efficiency is reduced.

[0006]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a metal strip capable of improving the working efficiency by eliminating deformation of the thin metal plate when the metal strip is wound by a winding device using a mandrel. An object of the present invention is to provide a winding method and apparatus.

[0007]

In order to achieve the above object, the present invention provides a method for winding a metal strip having a deformed cross section continuously around a mandrel. The winding height of the metal strip is detected while winding, and the pass line of the metal strip is detected based on the winding height.
Lower the mandrel axis so that the height of the
There is provided a winding method for metal strip, characterized in that to move the.

[0008] In this case, the downward movement of the mandrel shaft center causes the tension to increase as the winding height of the metal strip increases.
Tension to adjust the winding tension of the metal strip to be larger
The adjustment may be performed in parallel with the adjustment .

In order to achieve the above object, the present invention also provides a metal strip winding device for continuously winding a metal strip having an irregular cross section around a mandrel, wherein the metal strip is wound around the mandrel. Winding height detecting means for detecting a height, and the metal strip based on a detection signal of the winding height detecting means.
And a control means for adjusting the height of the axis of the mandrel so that the height of the pass line is kept constant .

In this case, the control means may adjust the winding tension of the metal strip based on the detection signal of the winding height detection means, and the winding height detection means may adjust the winding tension of the metal strip. When detecting that the winding height has reached a predetermined value, an operation of adjusting the height of the shaft center may be stopped irrespective of a subsequent change in the winding height.

[0011]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIGS. 1A and 1B show a first embodiment of a metal strip winding device according to the present invention. This winding device
A mandrel 1 rotatably supported by a support portion 6 provided on a base 5 and a deflector roll 4 for supplying a metal strip 3 having an irregular cross section wound around the mandrel 1.
A winding height detection sensor 2 such as a line sensor which is provided perpendicular to the axis 1A of the mandrel 1 and detects the winding height of the metal strip 3 wound on the mandrel 1, and a shaft of the mandrel 1 which is disposed below the base 5 A hydraulic cylinder 7 for moving the core 1A up and down, a hydraulic pump 8 for supplying hydraulic pressure to the hydraulic cylinder 7, and a motor 9 for rotating the mandrel 1 are provided. Guided by a rod 10.

As shown in FIG. 4 (a), the metal strip 3 is composed of a thick plate portion 31 having an irregular cross section and a thick central portion with respect to the width direction and a strip-shaped thin plate portion 32 having thin sides on both sides. Configuration.

In the above configuration, the winding height detection sensor 2
Has a length having a measurement range from the minimum radius to the maximum radius of the coil of the metal strip 3 wound on the mandrel 1, and is disposed at a position where the measurement range can be measured. Are output to a shaft center height control circuit 21 for controlling the height of the shaft core 1A and a tension control circuit 22 for controlling the tension of the metal strip 3.

The shaft center height control circuit 21 controls the hydraulic pressure supplied from the hydraulic pump 8 to the hydraulic cylinder 7 based on the detection signal of the winding height detection sensor 2 to adjust the height of the base 5.
The height of the shaft core 1A of the mandrel 1 is adjusted so that the winding height of the metal strip 3 and the pass line of the deflector roll 4 always keep a straight line at a constant height . Further, the tension control circuit 22 controls the rotation speed of the motor 9 based on the detection signal of the winding height detection sensor 2 and adjusts the winding tension to be most appropriate for the winding height.

FIG. 2 shows a state in which the pass line of the metal strip 3 does not change in the winding operation of the winding device of FIG. 1, and the base 5 descends from a solid line to a dotted line as the winding height increases. Therefore, the metal strip 3 is supplied to the mandrel 1 via the deflector roll 4 without changing the pass line. The metal strip 3 supplied to the mandrel 1 is wound on the mandrel 1 which is rotationally driven by the rotation of the motor 9. As described above, the winding height of the metal strip 3 wound on the mandrel 1 is always detected by the winding height detection sensor 2, and the winding height detection sensor 2 outputs the detection signal to the shaft center height control circuit 21. Output to

As described above, the shaft center height control circuit 21
Receives a detection signal from the winding height detection sensor 2 and adjusts the height of the shaft core 1A of the mandrel 1 based on the detection signal. That is, the hydraulic pump 8 is operated based on the detection signal from the winding height detection sensor 2, and the winding height of the metal strip 3 and the deflector roll 4 are reduced while reducing the hydraulic pressure of the hydraulic pump 8.
The base 5 is lowered so that the pass line always keeps a straight line.

On the other hand, the detection signal of the winding height detection sensor 2 is output to the shaft center height control circuit 21 and also to the tension control circuit 22 at the same time. When a detection signal from the winding height detection sensor 2 is input, the tension control circuit 22 controls the rotation speed of the motor 9 based on the detection signal. When the winding diameter is small, the tension is reduced, and the winding diameter is increased. In order to increase the tension, the winding tension is automatically adjusted to the most appropriate winding tension.

As described above, the winding height of the coil of the metal strip 3 is detected by the winding height detecting sensor 2, and the mandrel shaft 1A is automatically lowered in accordance with the winding height.
Is almost the same height as the position of the deflector roll 4
It can be kept in line with of. Further, according to the winding height of the coil of the metal strip 3 detected by the winding height detection sensor 2, the tension can be automatically changed so that the tension is small when the winding diameter is small and the tension is increased when the winding diameter is large. . For this reason, it is possible to prevent deformation of the wound metal strip 3 in the thin plate portion 32.

The same effect can be exerted by intermittently changing the winding tension according to the change in the winding coil diameter.

FIG. 3 shows a second embodiment of the present invention. The same parts as those in FIG. 1 are denoted by the same reference numerals and symbols, and a duplicate description will be omitted. However, a winding height detecting sensor 2 for detecting the winding height of the metal strip 3 is provided with a pass line of the metal strip 3. Is different from that of the first embodiment.
Although not shown, the detection signal of the winding height detection sensor 2 is output to the shaft center height control circuit 21 and the tension control circuit 22, and the detection signal causes the shaft center height control circuit 21 to output the hydraulic pressure of the hydraulic pump 8. Is adjusted to operate the hydraulic cylinder 7, and the tension control circuit 22 controls the rotation speed of the motor 9 in the same manner as in FIG.

In the second embodiment, the vertical movement of the pass line is regarded as a change in the winding height of the metal strip 3, and the winding height detection sensor 2 is provided on the pass line without being provided around the mandrel 1. There is a feature. With such a configuration, the same operation as that of the first embodiment can be performed, and there is an advantage that the device configuration around the mandrel 1 can be simplified, and the length of the sensor 2 can be reduced. it can.

As another example of the winding method, for example,
Up to a certain winding height, the shaft center 1A of the mandrel 1 is moved downward so as to keep the pass line of the metal strip 3 straight,
After that, the shaft core 1A of the mandrel 1 may be kept constant regardless of the thickness of the coil of the metal strip 3. By winding in this manner, it is possible to solve the problem particularly from the beginning of winding to the middle of the coil where deformation of the thin plate portion 32 of the metal strip 3 often occurs.

[0024]

As described above, according to the method and apparatus for winding a metal strip of the present invention, the winding height of the metal strip having an irregular cross section to be wound on a mandrel is detected and the pass line of the metal strip is detected. The mandrel shaft is moved downward so as to keep the mandrel at a certain height , so the thickness of the metal strip
The deformation of the thin plate portion in the direction can be eliminated. For this reason, the necessity of the straightening work is eliminated, and the work after rewinding becomes extremely effective.

[Brief description of the drawings]

FIG. 1 is an overall view showing a winding device configuration of the present invention;
(A) is the whole block diagram, (b) is the figure which looked at the winding of the metal strip from the plane.

FIG. 2 is a diagram showing an operation concept of the present invention.

FIG. 3 is a configuration diagram showing a second embodiment of the present invention.

FIG. 4 is a cross-sectional view of a metal strip having an irregular cross section;
(A) is a cross-sectional view of a metal strip in a normal state, and (b) shows deformation in a thickness direction which has occurred in a thin plate portion when the metal strip of (a) is wound by a conventional winding device. It is sectional drawing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Mandrel 1A Mandrel shaft core 2 Winding height detection sensor 3 Metal strip 4 Deflector roll 5 Base 6 Support post 7 Hydraulic cylinder 8 Hydraulic pump 9 Motor 10 Guide rod 21 Shaft core height control circuit 22 Tension control circuit 31 Thick plate portion 32 Thin plate Department

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B21C 47/02 B21C 47/00

Claims (5)

(57) [Claims] 1. A method for winding a metal strip having a deformed cross section continuously on a mandrel, wherein the winding height of the metal strip is detected while winding the metal strip on the mandrel. A method of winding a metal strip, comprising: moving a mandrel shaft core downward so as to maintain a constant height of a pass line of the metal strip based on the above. 2. The mandrel according to claim 1, wherein said mandrel is moved downwardly .
The tension increases as the winding height of the metal strip increases
The method of winding a metal strip according to claim 1, wherein the method is performed in parallel with the tension adjustment for adjusting the winding tension of the metal strip. 3. A winding device for a metal strip which continuously winds a metal strip having an irregular cross section around a mandrel, wherein a winding height detecting means for detecting a winding height of the metal strip wound on the mandrel; Pa of the metal strip based on a detection signal of the high detection means
The mandrel axle so that the height of the line is kept constant
And a control means for lowering the core . 4. A winding tension of said metal strip based on a detection signal of said winding height detecting means in addition to said control means.
To increase as the winding height increases
Metal strip winding apparatus according to claim 3, wherein the chromatic force control means. 5. The control means, when the winding height detecting means detects that the winding height of the metal strip has reached a predetermined value,
Adjustment of the height of the shaft center regardless of the subsequent change of the winding height
The winding device for a metal strip according to claim 3 , further comprising a configuration capable of stopping a setting operation .