JP2003344005A - Method of measuring thickness of coiled plate and device therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of measuring the thickness of a plate capable of measuring the thickness of a coiled plate precisely in a short time on a line, and to provide a device therefor. <P>SOLUTION: On the output side of a rolling line, a coil car 3 is raised to the outer periphery of a rolled up coil 1 on a tension reel 2, and a detector provided in the car 3 detects a contact with the outside of the coil 1, thereby calculating the amount of rise of the coil car 3 from a reference position. The thickness of the coil is calculated based on the amount of the rise. From the thickness of the coil and the number of turns of the coil, the thickness of the plate is calculated on the line. The device for measuring the thickness of the plate is provided with a means for calculating the rise of the coil car 3 based on a signal from the detector provided in the coil car 3 to calculate the thickness of the plate of the coil 1. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil plate thickness measuring method and apparatus capable of accurately measuring the coil plate thickness on a line in a short time.

[0002]

2. Description of the Related Art Conventionally, in a steel manufacturing plant, a length measuring instrument such as an X-ray plate thickness gauge is used in a line to process a steel plate to a predetermined thickness. This is because if the plate thickness of the coil is not a predetermined value, it may cause a defective product on the user side (for example, a defective punching of the can). Therefore, it is necessary to periodically check whether the length measuring device is measuring normally. We try to ensure the quality by measuring. As a conventional coil plate thickness calculation method, after the coil is molded, the coil thickness is measured after the coil is carried out of the line by a coil car,
A method of manually calculating the plate thickness per steel plate by dividing it by the number of turns of the plate is performed. Therefore, accurate coil wall thickness measurement is a prerequisite for coil plate thickness management.

However, in the conventional method as described above, the measurement is carried out after the coil is carried out from the line for each measurement, so that the work efficiency is inferior and the work load of the operator increases because the measurement is performed manually. There was a point. In addition, it is a method to measure after the coil is carried out of the line, and since the line is running during the measurement, if it is found that the plate thickness is off, the predetermined plate thickness is measured during the measurement. There is also a problem in that waste will occur because the coils that have come off will be produced continuously. More recently, the number of products requiring a plate thickness deviation called a plate thickness strict member within the range of micron order is increasing, and in the conventional steel plate plate thickness calculating method, as shown in FIG. If there is a deformation of the inner diameter of the coil called a buckling, an error (T1 ≠ T2) will occur depending on the measurement location, and the accurate coil wall thickness cannot be measured. Consequently, the accurate coil plate thickness must be calculated. There was a problem that I could not do it.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art so that the wall thickness of the coil can be measured on the line and the occurrence of a coil out of a predetermined plate thickness is prevented. In addition, the thickness of all coils can be measured accurately and in a short time, the work load of the operator can be reduced, and the measurement accuracy is not affected by buckling. The present invention has been completed for the purpose of providing a method and an apparatus for measuring the thickness of a coil that can be performed with high accuracy on the order of microns.

[0005]

SUMMARY OF THE INVENTION The present invention, which has been made to solve the above-mentioned problems, provides a detector provided on a coil car by raising a coil car toward the outer periphery of a coil on which a steel plate has been wound on a tension reel. Detects that the coil car has come into contact with the outer diameter of the coil, and calculates the amount of rise from the reference position of the coil car.The wall thickness of the coil is calculated based on the amount of rise of this coil car. A coil thickness measuring method characterized in that the coil thickness is calculated on the line from the number of turns of the steel plate, and a coil for which the winding of the steel plate is finished on the tension reel at the exit side of the rolling line. A coil car that moves up and down toward the outer periphery of the coil car is provided with a detector that detects that the coil car has come into contact with the outer diameter of the coil, and receives a signal from the detector. A means for calculating the amount of rise from the reference position is provided, the thickness of the coil is calculated based on the calculated amount of rise of the coil car, and the thickness of the coil is calculated from the thickness of the coil and the number of turns of the steel plate. A plate thickness measuring device for a coil, characterized in that a calculating means is provided.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described below with reference to the drawings. 1 to 2, 1
Is a coil that has exited a rolling line (not shown) and has finished winding a steel plate having a predetermined thickness on the output side, 2 is a tension reel for winding the steel plate, and 3 is a coil 1 for carrying the coil 1. It is a coil car that can move up and down.
Conventionally, after the coil car 3 receives the coil 1 and horizontally moves the coil 1 to the outside of the line, the thickness of the coil 1 is directly measured manually by a measure or the like. However, in the present invention, the coil car 3 is used. Is provided with a detector for detecting the contact with the outer diameter of the coil 1 which has finished winding the steel plate, and means for receiving the signal from the detector to calculate the amount of rise of the coil car 3 from the reference position. By providing an arithmetic means for calculating the wall thickness of the coil 1 based on the calculated amount of rise of the coil car 3, it is possible to measure the wall thickness of the coil 1 on the line accurately and in a short time. It is configured.

More specifically, as the detector, for example, a pressure detecting sensor such as a pressure switch, which can be easily mounted on the coil car 3, is used. In addition, it goes without saying that a non-contact type sensor such as a photoelectric tube may be used. Then, as shown in FIG. 1, the coil car 3 is lifted toward the outer periphery of the coil 1 on which the steel plate has been wound onto the tension reel 2 on the exit side of the rolling line, and the coil car 3 is removed from the coil by the detector. The contact with the diameter is detected and the amount of rise (L2) from the reference position of the coil car is calculated. Then, based on the amount of rise (L2) of this coil car,
The thickness of the coil is calculated on the line based on the following [Equation 3] in consideration of the known distance (L1) between the center position of the tension reel and the reference position and the radius (r) of the tension reel.

[0008]

[Equation 3]

As described above, according to the present invention, the thickness of the coil is
Calculation method based on the distance (L1) between the mechanically determined center position of the tension reel 2 and the reference position, the radius (r) of the tension reel 2, and the lift amount (L2) of the coil car 3 with a small measurement error. Therefore, it is possible to calculate on the line extremely easily and accurately.
After calculating the coil wall thickness, as shown in FIG.
Calculate the plate thickness per steel plate by dividing it by the number of turns of the steel plate that has been separately detected, and from the tension reel inclination due to the coil weight that has been calculated in advance for each tension reel and the zero point adjustment. The final plate thickness is calculated by adding the correction coefficient (tension reel rigidity factor α). After that, it is checked whether the plate thickness is within the error range of the predetermined value, if it is a defective product, a warning is issued, the operator is alerted, and the defective product deviating from the specified plate thickness is detected. Occurrence can be suppressed.

[0010]

EXAMPLE A coil of the size shown in Table 1 was produced, and the thickness of the coil was measured by the method of the present invention on the outlet side of the rolling line. Table 1 shows the result of comparison between the wall thickness of the coil thus obtained and the wall thickness of the same coil which was actually measured manually. Δt is ± 0.
It was confirmed that when it was 2% or less, the plate thickness deviation was in the range of micron order when converted to the coil plate thickness, and it was possible to sufficiently cope with strict plate thickness strictly controlled materials.

[0011]

[Table 1]

[0012]

As is apparent from the above description, according to the present invention, the wall thickness of the coil can be measured on the line, and the occurrence of the coil having a deviation from the predetermined plate thickness can be minimized. The thickness of the coil can be measured accurately and in a short time, the work load on the operator can be reduced, and the measurement accuracy is high with micron order without being affected by buckling. Is something that can be done. Therefore, the present invention is extremely large in that it contributes to the development of industry as a method and apparatus for measuring the thickness of a coil that eliminates the conventional problems.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a process explanatory view showing the embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a conventional example.

[Explanation of symbols]

1 coil 2 tension reel 3 coil car

Claims (3)

[Claims] 1. A coil car reference position for detecting the contact of the coil car with the outer diameter of the coil by a detector provided on the coil car when the coil car is raised toward the outer periphery of the coil on which the steel plate has been wound on a tension reel. Then, the wall thickness of the coil is calculated based on the amount of lift of the coil car, and the plate thickness of the coil is calculated on the line from the wall thickness of the coil and the number of turns of the steel plate. A method for measuring the thickness of a coil, which is characterized by the above. 2. The coil plate thickness measuring method according to claim 1, wherein the coil wall thickness is calculated based on [Equation 1]. [Equation 1] 3. A coil car, which moves up and down toward the outer circumference of a coil on which a steel plate has been wound on a tension reel, is provided with a detector for detecting that the coil car is in contact with the outer diameter of the coil on the exit side of the rolling line. In addition to providing the means for receiving the signal from the detector and calculating the amount of rise of the coil car from the reference position, the thickness of the coil is calculated based on the calculated amount of rise of the coil car, and the thickness of this coil is calculated. A coil plate thickness measuring device comprising a calculating means for calculating the coil plate thickness based on [Equation 2] from the thickness and the number of turns of the steel plate. [Equation 2]