JPH09267127A - Method and device for aligning strip metal coil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correctly enable aligning even when there is a disorder on the outer peripheral shape of the coil by measuring the weight and the width of the strip metal coil, operating the outside diameter of the coil by using measured values, giving an alignment distance to a coil lifter by using an operated result, and controlling elevating and lowering. SOLUTION: The coil 1 is placed on a weighting part 4 and coil weight W is measured. Next, the coil 1 is placed on a coil transfer means 6, and when it passes through a width measuring part 5, after a coil width B is measured, it is placed on a coil lifter 9. The measured coil weight W and coil width B are sent to an arithmetic and control part 7, and an alignment distance X is found by the arithmetic and control part 7. The alignment distance X is given to an actuator 12, and control to the coil lifter 9 is started. Simultaneously with the control start, the pisition of a hydraulic cylinder 11 is elevated and lowered by the alignment distance X and is stopped. Consequently, the coil lifter 9 is elevated and lowered by the alignment distance X and alignment is completed.

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 aligning a metal strip coil.

[0002]

2. Description of the Related Art A metal strip processing line always includes a step of inserting an inner diameter portion of a metal strip coil (hereinafter also simply referred to as a coil) into a reel of a rewinding machine for rewinding. It is necessary to accurately align the axes of the coil and reel (referred to as centering).

Since the coil is usually placed on a coil lifter that can be centered with respect to the reel shaft, there is no particular problem with axial alignment in the plane, but in the height direction, the position of the coil core changes depending on the coil outer diameter. It is necessary to adjust the height of the coil lifter for each coil, and it is inefficient if this is done by the operator's visual judgment, and troubles such as collision damage of the coil due to erroneous judgment are inevitable. Therefore, various automatic aligning devices have been proposed.

For example, Japanese Unexamined Patent Publication No. 51-114355 discloses a centering device in which a contact type coil outer diameter detecting plate, a pulse oscillator, a pulse counter and the like are combined. However, since the centering device uses the contact-type coil outer diameter detection plate, the movable range of the detection plate must be larger than the coil outer diameter, and therefore the device scale becomes large and there are problems in terms of space and maintenance. .

In order to improve this point, for example, Japanese Patent Publication Sho 51
-25815 gazette uses a light emitting and receiving type photocell to detect the outer diameter of the coil, and downsizing the lifting mechanism of the coil lifter.
An aligning device that is made compact as a whole has been proposed, and these types of aligning devices have become the mainstream these days.

[0006]

However, for example, a coil in a state of being bound by a band, or a steel strip coil having a disordered shape after batch annealing as shown in FIG. For the coil 1 with a wave or unevenness with a height larger than the difference between the inner diameter of the coil and the outer diameter of the reel (in the case of a steel strip coil, it is usually about 40 mm), the outer diameter is directly detected by the light emitting and receiving type photoelectric tube and lifted. However, if the peaks 2 and valleys 3 on the outer circumference of the coil are detected, it is not possible to perform accurate centering.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method and an apparatus for aligning a metal strip coil which can be accurately aligned without being affected by irregularities in the outer peripheral shape of the coil.

[0008]

The present invention measures the coil weight and coil width of a metal strip coil before reel insertion,
A centering method for a metal band coil, wherein an outer diameter of a coil is calculated by using the measured value, and an ascending distance is given to a coil lifter by using the result of the calculation to control the elevation.

According to the method of the present invention, the weighing unit for measuring the coil weight of the metal strip coil before loading the reel, the width measuring unit for measuring the coil width of the coil, and the measured values of the coil weight and the coil width are used. A metal band coil centering device comprising: an arithmetic controller for calculating the coil outer diameter by using the measured value and applying a centering distance to the coil lifter based on the calculation result to control the elevation. It can be carried out efficiently.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, the coil outer diameter is not directly detected, but the coil outer diameter is calculated from the measured values of the coil width and the coil weight, and based on the calculation result, the coil lifter is provided with the centering distance to move up and down. I tried to control it. Therefore, according to the present invention, accurate alignment can be performed without being influenced by the disorder of the outer peripheral shape of the coil.

The outer radius of the coil without weight is R ₀ ,
The outer coil radius of the lower part in the vertical direction under its own weight is R, the inner coil radius is r, the coil width is B, the coil weight is W, the density of the metal strip is γ, the shape correction coefficient related to the coil own weight is η, If the pi is π, then there is a relationship of the following equations (1) and (2). R ₀ = {r ² + W / (γπB)} ^1/2 (1) R = ηR ₀ (2) In equations (1) and (2), γ and π are constants. , R is given by the inner diameter of the sleeve existing in the inner diameter of the coil, and η
Is given as a function of R ₀ , W and the coil space factor, therefore, if the coil width B and the coil weight W are measured, the coil in the lower vertical direction in the state where its own weight is applied from the equations (1) and (2). The outer radius R can be determined.

FIG. 1 is an explanatory diagram of an embodiment of the present invention.
In FIG. 1, 1 is a coil (metal strip coil), 4 is a placing type weighing unit, 5 is a width measuring unit using a light emitting and receiving type photocell,
6 is a coil conveying means such as a coil car or a coil conveyor, 7 is an arithmetic control unit, 9 is a coil lifter, 10 is a reel of a rewinder, 11 is a hydraulic cylinder for lifting the coil lifter, 12 is a hydraulic cylinder for designating the lifting amount. An actuator for urging up and down, 13 is a height reference plane, B is a coil width, W is a coil weight, R is a coil outer radius of a vertically lower part under its own weight, and H is a reel height (height). The vertical component of the distance between the reference plane and the reel core is positive and the bottom is negative), and X is the centering distance (the vertical component of the distance between the coil core and the reel core).

The coil lifter 9 is centered with respect to the reel 10 and is set at a centering start position where the coil mounting surface coincides with the height reference surface 13, and the axial center of the coil 1 on the coil mounting surface. Is on the same vertical plane as the axis of the reel 10, the centering distance X is X = HR, as shown.
When the centering distance X is inputted and the control start signal is received, the actuator 12 moves the hydraulic cylinder 11 up and down by the centering distance X (if X is positive, it goes up, if negative, it goes down). The coil lifter 9 is preferably set at the alignment start position after the coil 1 is placed.

The coil 1 is in the process of being conveyed to the reel 10,
The coil weight W is placed on the weighing section 4, the coil weight W is measured, and then the coil width B is measured by a conventional method when the coil weight W is placed on the coil conveying means 6 and passes through the width measuring section 5.
It is put on. The measured coil weight W and the measured coil width B are sent to the arithmetic control unit 7, and the arithmetic control unit 7 receives W and B and calculates R by the equations (1) and (2), and further calculates H-
R is calculated to find the centering distance X, and this is used as an actuator
Then, the control for the coil lifter 9 is started. Simultaneously with the start of control, the piston of the hydraulic cylinder 11 moves up and down by the centering distance X and stops. As a result, the coil lifter 9 moves up and down just by the centering distance X, and the centering is completed.

Of course, the control start timing is after the coil lifter 9 on which the coil 1 is mounted is set at the centering start position. After this, coil 1 and reel 10
The coil lifter 9 may be returned to the centering start position after the insertion is completed. Since the centering is accurately performed by the present invention, the coil insertion work is extremely easy.

In the present embodiment, the case where the lifting mechanism of the coil lifter 9 is of the hydraulic type has been described, but it goes without saying that the present invention can also be applied to the case of the electric type. Further, in the present invention, the weighing unit 4 may be a suspended type instead of the mounting type of the present embodiment, and further, in the present embodiment, instead of the coil transfer means 6 and the coil lifter 9 which are individually provided, An integrated device having both functions may be used.

[0017]

[Example] When the present invention was carried out on a coil rewinding machine of a cold-rolled steel strip conditioning line, the coil insertion success rate on the reel was 100%, which was 90% before the execution. We were able to reduce the time required for the realignment work of about 60 seconds.

[0018]

According to the present invention, even if the outer peripheral shape of the metal strip coil is disturbed, it is possible to perform accurate centering without being influenced by it.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an embodiment of the present invention.

FIG. 2 is an external view of a coil having a disordered outer peripheral shape that cannot be accurately centered in the conventional technique.

[Explanation of symbols]

1 coil (metal coil) 2 crest 3 trough 4 weighing section 5 width measuring section 6 coil transfer means 7 arithmetic control section 9 coil lifter 10 reel 11 hydraulic cylinder 12 actuator 13 height reference plane B coil width H reel height R own weight Outer radius of the coil in the lower part in the vertical direction with a load applied W coil weight X centering distance (vertical component of the distance between the coil core and the reel core)

Claims (2)

[Claims] 1. A coil weight and a coil width of a metal strip coil before being inserted into a reel are measured, an outer diameter of the coil is calculated by using the measured values, and an elevation distance is given to a coil lifter by using the calculation result. A method for aligning a metal strip coil, which is characterized in that: 2. A weighing unit for measuring the coil weight of the metal strip coil before loading the reel, a width measuring unit for measuring the coil width of the coil, and the measured value for taking in the measured values of the coil weight and the coil width. A centering device for a metal band coil, comprising: an arithmetic control unit for calculating an outer diameter of a coil by using the calculation unit and controlling an ascending / descending distance by giving a centering distance to the coil lifter.