JP2824141B2 - Hot coil processing method - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of processing a hot coil (strip) hot-rolled and wound, and more particularly to a method of processing a coil based on the degree of unevenness of an edge portion. About the method.

Prior art The hot coil wound by hot rolling is hung by a lifting hook such as a C type or an L type, lifted by a crane and transported to another yard, but the edges of the side surface of the hot coil are not uniform. Despite the degree of difference, it is usual that the surface is uneven in a telescope shape. In processing the hot coil, the following judgment and the processing based on the degree of the unevenness are performed.

(1) Whether or not the lifting hook is changed When it is determined that the loading / unloading operation cannot be performed with the normal lifting hook because the amount of unevenness is large and the work efficiency and the safety condition are not sufficient, a change to the lifting hook having a longer arm is instructed.

(2) Whether or not there is a rating change If the edge has a certain amount of protrusion,
Change the rating (hereinafter simply referred to as rating change) as an off-grade product to prevent shipment of abnormal products.

(3) Change in coil destination If the protrusion of the edge is more than the allowable range of the manufacturing specifications, a.

b. Cutting and removing edges protruding laterally by gas (hereinafter referred to as SB) c. Correcting process such as cutting and removing the entire plate-shaped portions protruding laterally (hereinafter referred to as SA) in the controlled rolling (skin pass) process Instructions for sending to the correction process (hereinafter simply referred to as destination instructions), instructions for the number of bands for coil bundling, marking instructions for displaying coil destinations, conveyor operation instructions, crane loading Instruct wholesalers.

(4) Change of storage area If a normal lifting hook can be used but the protrusion of the edge is large, the unloading work of the coil is performed with special care, transported to a special storage area, and separately managed (hereinafter referred to as “separate management”). It is called storage-by-place management).

Problems to be Solved by the Invention The above-described determination is based on the fact that an on-site worker measures the amount of edge protrusion by a measure and performs the processing based on experience and manual.

The present invention measures the amount of protrusion and the position of the edge of the wound side surface of the hot coil, and automatically performs coil processing based on the measured amount.

Means for Solving the Problems That is, the present invention provides a process of measuring the amount and position of protrusion of an edge portion of a wound hot coil side surface, a process of inputting a measured value to a computer, and a computer in which a lifting hook and a coil rating are obtained from the input value. , Determining whether or not the coil destination has changed, determining the coil processing based on the determination, and displaying the determined processing on the CRT.

Here, the measurement of the protrusion amount and the protrusion position of the edge portion and the input of the measurement value to the computer may be performed manually, but preferably, the measurement and the input of the measurement value are performed automatically.

To detect the shape of the edge of the hot coil side,
A method widely known as a surface shape detection method based on the light section method and the triangulation method may be used.

FIG. 1 shows an example of this, in which a slit plate 2 is placed in a heat-shielding box 1 provided with a transparent heat-resistant glass on the front surface.
3 for generating slit pattern light
And a V-shaped reflecting mirror 4 that can adjust the position forward and backward and refracts the two slit lights emitted from the projector 3 by 90 ° in opposite directions to each other and reflects symmetrically, and a front side of the reflecting mirror 4. A reflecting mirror 6 disposed and directed to the side surface of the hot coil 5 and a TV camera 7 for taking reflected light from the side surface of the hot coil through the reflecting mirror 6 are provided. The slit light reflected from the mirror passes therethrough.

On both sides of the box 1, reflectors 9 are arranged,
The slit light that has passed through the reflector is reflected by the reflecting mirror 9 and is reflected on the side surface of the hot coil from two directions.

An image processing device 11 is connected to the TV camera 7, and the device performs extraction of a slit light contour image and detection of a hot coil winding shape from a slit light pattern image captured by the TV camera 7.

FIG. 2 shows an example of the processed image, in which slit light images emitted from both left and right directions are shown on both sides of a reference line c at the center of the image. The length in the horizontal direction from the reference line c to the slit image is proportional to the actual edge protrusion amount, and the protrusion amount is calculated from the top to the bottom of the screen for each scan line by the left and right slit images from the reference line c. This is performed by obtaining the number of pixels up to.

The protrusion amount and the protrusion position obtained as described above are input to the computer 12. As described above, the computer 12 determines whether or not the lifting hook, the coil rating, and the coil destination have been changed from the input values, determines the coil processing method, and displays the method on the CRT 13.

Embodiment The protruding amount and protruding position of the edge of the side surface of the hot coil are input to the computer after being detected artificially or automatically by the detection method based on the light section method and the triangulation method described above.

The computer makes the following determination based on the amount of protrusion of the edge of the side surface of the hot coil, and instructs coil processing.

1) If the edge does not protrude, instruct the work as planned, and use a normal hook to transfer the coil to the specified place.

2) If the maximum protrusion of the edge is 70 mm or less, (1) If the maximum protrusion is 30 mm or less, direct the work as planned, and if the maximum protrusion is 30 mm or more, When the width exceeds 1321mm, the direction is changed. When the board width does not exceed 1321mm, the direction of the change of the destination and the rating are instructed.
Specify SB or SA depending on whether it is within 10 volumes.

(2) If it is not for export and it is not for external sales that will be shipped as a product as it is, direct the work as planned, and if it is for external sales, use a cutout with a thickness of 2 mm or less as described above Treat it as if it were for export. If the thickness is not 2 mm or less, specify the work as planned depending on whether the maximum protrusion is 50 mm or more, or treat it for export and the same as that with a maximum protrusion of 30 mm or more. .

3) When the maximum protruding amount of the edge is 120mm or less, (1) When the maximum protruding amount is less than 100mm for chrome stainless steel (SUS) and when the nickel is stainless steel, the instruction of the place-specific management is given. When the maximum protruding amount is 100 mm or more for stainless steel that is neither chrome-based or nickel-based and chrome-based stainless steel, the destination is changed, the rating is changed, and S
Perform the instructions in A.

(2) When the plate width is 1321 mm or more instead of stainless steel, a direction change is instructed. When the plate width is 1321 mm or less, a direction change and a rating change instruction are performed. Instruct SB or SA depending on whether it is within 10 volumes.

4) When the maximum protrusion amount of the edge is within 120 mm.

(1) Nickel stainless steel with a maximum protrusion of 200mm
When the following conditions are met, instructions are given for each storage area and hook change.If the maximum protrusion exceeds 200 mm, change the destination or change the rating and SA according to whether the board width exceeds 1321 mm in addition to the storage area management and hook change. Instructions.

(2) Other than nickel-based stainless steel, if the projecting position is within 10 turns from the inside and outside and the plate width is 1321 mm or more, the direction of destination change, rating change, SB, place change, hook change, If the projecting position exceeds 10 turns from the inside and outside and the board width is 1321 mm or less, change the destination, change the rating, S
A, change the place, change the hook.

Effect of the Invention According to the method of the present invention, the maximum protrusion amount of the edge portion of the hot coil side surface is measured and inputted to a computer, whereby the processing of the coil such as the lifting hook, the coil rating, and the coil destination change is automatically performed. If the measurement of the protrusion amount and the protrusion position of the edge is performed by the surface shape detection method based on the light cutting method and the triangulation method, the measurement of the maximum protrusion amount of the edge portion and the position thereof are accurately performed. . If the measurement results are input directly to the computer, the processing of the hot-rolled hot coil can be automated,
Labor saving and efficiency.

[Brief description of the drawings]

FIG. 1 is a schematic view of an apparatus used in the method of the present invention, FIG. 2 is a view showing an example of a detected image, and FIG. 3 is a view showing a processing method by a computer. 2 ... Slit plate, 3 ... Projector 4, 6, 9 ... Reflection mirror, 5 ... Hot coil 7 ... TV camera, 11 ... Image processing device 12 ... Computer, 13 ... CRT

Continuation of front page (56) References JP-A-48-72062 (JP, A) JP-A-4-55017 (JP, A) JP-A-1-205817 (JP, A) JP-A-62-40932 (JP, A) , A) JP-A-61-189818 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) B21C 47/26 B65H 26/00

Claims (3)

(57) [Claims] A step of measuring the amount and position of the protrusion of the edge of the side surface of the hot coil wound by hot rolling; a step of inputting the measured value to a computer; A hot coil processing method comprising the steps of determining whether or not the rating and coil destination have been changed, determining the processing of the coil based on the change, and displaying it on a CRT. 2. The hot coil processing method according to claim 1, wherein the protrusion of the edge portion of the side surface of the hot coil and the measurement of the protrusion position are performed by a surface shape detection method based on a light cutting method and a triangulation method. 3. The hot coil processing method according to claim 2, wherein the data on the protrusion amount and the protrusion position of the edge portion is directly input to the computer.