JP5109451B2 - Non-fixed location management method of finishing yard and tracking method of steel plate - Google Patents

Description

  The present invention relates to off-line production management of a steel sheet, and particularly to placement management in a refining process.

  Steel sheets have various production processes such as shearing / cutting, heat treatment, surface treatment (primary rust prevention treatment), ultrasonic inspection, etc. These combinations are determined by standards and specifications, so there are many combinations. Go up.

  Therefore, after rolling the steel sheet, it passes through many processes until it is finally carried into the product shipping yard. Not all of these processes are connected online, so in the process of accepting intermediate products that occur halfway until the final steel plate is manufactured, in a place provided in a predetermined space in the factory, Storage management for temporary storage of intermediate products is performed.

  For example, thick steel plates have various plate thicknesses ranging from 6 mm to 300 mm. Steel plates with a thickness that cannot be sheared by a shearing machine are sent to an off-line gas cutting process after rolling, and intermediate in the gas cutting field. Product storage management is performed. In the following, gas cutting will be described as an example, but the same applies to an off-line cutting method other than normal gas cutting such as laser cutting and electron beam cutting.

  In this case, the intermediate product is stacked as a separate pile for each processing attribute such as a dimension and a destination, and stored until the gas cutting process is performed. And due to the limitations of the factory building space, the storage area for intermediate products is limited, and complicated handling may be required, such as stacking intermediate products in a mixed state or frequently repeating transshipment work. .

  In this case, the identification management for each steel sheet is to mark the steel sheet by hand when the steel sheet moves from online to offline or when the steel sheet is actually divided into multiple sheets at the gas cutting place. It is often done by.

  Conventionally, various proposals have been made to reduce the work burden associated with the management of storage of intermediate products. However, Patent Document 1 discloses a temporary storage condition file that defines the type, dimensions, packing style, etc. A method for managing the location of a cut plate product that can reduce piles and improve workability by deciding an existing unloading destination using a file that specifies the priority of mixed loading at the time is disclosed Yes.

  In Patent Document 2, in the storage location of a hot rolled coil divided into a plurality of sections, the actual product is received in the section with the lowest load rating of each section, thereby equalizing the number of times of handling of the cranes installed in each section The storage management method which aimed at is disclosed.

JP-A-6-179525 Japanese Patent Laid-Open No. 6-255791

  However, in the storage management described above, the address of each storage is fixed, and even if a plurality of products are piled up in the storage, products with the same attributes such as the same destination are collected, and the storage in the fixed space There is a storage management method in the case where each product and storage address correspond one-to-one. There is no disclosure of a product storage management method that can flexibly change the storage space. In addition, there is no mention of problems related to mixing of different materials due to a description mistake or the like when marking the steel plate number on the steel plate while an operator in the factory confirms the mountain order list.

  Since the present invention has a limited storage space, such as a steel plate maintenance place or a gas cutting place, a large number of places where steel plates are placed regardless of the product size. This is a non-fixed storage management method that determines the location of the product to be placed next by judging the state of the product that already occupies the storage, and the steel plate storage where the stored steel plates are replaced in a short time And the place management method which can set a place address flexibly according to the dimension of the steel plate to store is provided.

  The inventor diligently studied the above-mentioned problems and completed the invention, and the gist thereof is as follows.

The first invention is an off-line gas cutting place attached to a thick steel plate rolling line .
(A) After rolling, on the coordinates where the gas cutting field is partitioned in a grid by the XY coordinates, which coincide with the XY axis traveling direction of the overhead crane registered in the finishing yard management process computer , Using the steel plate number and rolling dimensions (width, length) of the steel plate to be carried into the gas cutting field, determining the arrangement planned position coordinate ( coordinate of the steel plate center) of the steel plate to be carried in and the coordinates of the four corners of the steel plate ; ,
( B) After the next material, determining the arrangement position coordinates of the already arranged steel plates, repeating the step (A), and determining the arrangement position position coordinates of the steel plates to be loaded ;
(C) The steel plate number, the rolling dimension (width and length ) of the steel plate to be lifted by the ceiling clay, the coordinate of the arrangement planned position ( coordinate of the steel plate center), and the coordinates of the four corners of the steel plate are transmitted to the overhead crane to instruct the lifting Process,
(D) lowering the steel plate to the indicated position and registering the arrangement position coordinates of the arranged steel plates;
(E) from each steel plate arranged in the gas cutting field, gas cutting the cut plate (rectangle) according to the cutting method of specification information, cutting dimensions, the number of cuts;
(F) When collecting a plurality of steel plates (cut plates (rectangular)) from a rolled steel plate by gas cutting, a new steel plate number is assigned to each cut plate instead of the rolled steel plate number, and the width of each cut plate Calculating the coordinates of the steel plate center position of each cut plate and the coordinates of the four corners of the steel plate from the length dimension, and registering the steel plate center coordinates of each cut plate together with the steel plate number as an array position coordinate ;
(G) After completion of gas cutting , a step of collating the steel plate number of the steel plate to be carried out to the next step, the arrangement position coordinates and the overhead crane lifting position coordinates;
(H) Lifting a steel plate with an overhead crane, paying it out to the next process, and registering that the place (array position coordinates) is acceptable for the next material. It is a ceremony storage management method.

The second invention is an off-line gas cutting place attached to a thick steel plate rolling line .
(A) After rolling, on the coordinates where the gas cutting field is partitioned in a grid by the XY coordinates, which coincide with the XY axis traveling direction of the overhead crane registered in the finishing yard management process computer, Using the steel plate number and rolling dimensions (width, length) of the steel plate to be brought into the gas cutting field, the planned arrangement position coordinates ( coordinates of the steel plate center) of the steel plates to be carried in and the coordinates of the four corners of the steel plates are determined and tracking is performed. Starting the process;
( B) After the next material, determining the arrangement position coordinates of the already arranged steel plates, repeating the step (A), and determining the arrangement position position coordinates of the steel plates to be loaded ;
(C) The steel plate number of the steel plate to be lifted by the overhead crane, the rolling dimensions (width and length), the arrangement position coordinates ( coordinates of the steel plate center), and the coordinates of the four corners of the steel plate are transmitted to the overhead crane to instruct lifting. Process,
(D) lowering the steel plate to the indicated position and registering the arrangement position coordinates of the arranged steel plates;
(E) from each steel plate arranged in the gas cutting field, gas cutting the cut plate (rectangle) according to the cutting method of specification information, cutting dimensions, the number of cuts ;
(F) When a plurality of steel plates ( cut plates (rectangular)) are obtained from the rolled steel plate by gas cutting, a new steel plate number is assigned to each cut plate instead of the rolled steel plate number, the width of each cut plate , Calculating the coordinates of the steel plate center position of each cut plate and the coordinates of the four corners of the steel plate from the length dimension, and registering the coordinates of the steel plate center of each cut plate together with the steel plate number as array position coordinates ;
(G) After completion of gas cutting , a step of collating the steel plate number of the steel plate to be carried out to the next step, the arrangement position coordinates and the overhead crane lifting position coordinates;
(H) A steel sheet tracking method in a gas cutting field, comprising the steps of: lifting a steel plate with an overhead crane, paying it out to the next step, and ending tracking.

  According to the present invention, in the offline work of a steel plate, it becomes possible to manage the place where foreign materials are not mixed.

  The present invention will be described below with reference to the drawings.

FIG. 4 shows an example of a steel sheet gas cutting field as an example of the finishing yard 5. Since a coordinate axis is not drawn in the yard, a method for setting a coordinate axis as a point of the present invention will be described.

  An overhead crane 1 that covers the entire width of the yard is always installed in the gas cutting place for transporting steel sheets. The overhead crane 1 can move on the garter 2, and the garter 2 can move on the track 3. Thereby, the overhead crane 1 can reach the entire finishing yard 5. When the X axis scale a is set on the track 3 and the Y axis scale b is set on the garter 2 so that it can be detected, the crane center 4 of the overhead crane 1 is set at the intersection (a, b). That is, since the overhead crane 1 can move freely in the XY directions, the crane center 4 can cover the entire range of the finishing yard 5.

  Therefore, if the X-axis scale a of the track 3 and the Y-axis scale b of the garter 2 can be transmitted / received as distance data from the base point, the overhead crane can perform gas cutting by receiving the data. You can always keep track of where you are in the field.

  Therefore, if the data is registered in the precision yard management process computer (hereinafter referred to as PC) so that it can be displayed together with the XY coordinates 6 and can be displayed on the screen, the ceiling crane 1 can communicate with the overhead crane 1 at all times. The location of the crane center 4 of the crane 1 can be grasped on the XY coordinates 6.

  On the other hand, when the steel plate is suspended by the overhead crane 1 as shown in FIG. 5, the balance of the center of gravity is taken into consideration, and the steel plate 12 is usually suspended at two locations equally distributed by the lifting magnet 11. If it does so, the center 13 of the width | variety and length direction of the steel plate 12 can be made to correspond with the center 4 of the overhead crane 1. FIG. As a result, the center 4 of the overhead crane 1 displays the center 13 in the width and length directions of the steel plate 12 transported by the crane 1 on the XY coordinates 6.

Regarding the adjustment yard position coordinates of the steel plate As shown in FIG. 3, when the coordinates of the four corners of the steel plate are indicated by (X1, Y1), (X1, Y2), (X2, Y1), (X2, Y2), the steel plate The center 13 can be represented by ((X1 + X2) / 2, (Y1 + Y2) / 2). Therefore, as described above, the steel plate center 13 can be matched with the center 4 of the overhead crane 1, so the place where the steel plate 12 is suspended by the finishing yard 5 by the overhead crane 1 (the place where the steel plates 12 are arranged). Is the position (coordinates) of the center 4 of the overhead crane 1 and indicates the position (coordinates) of the center 13 of the steel plate 12.

FIG. 6 shows an example in which the finishing yard is represented in a grid pattern on the PC by XY coordinates.
Reference numeral 12 denotes a steel plate 12 arranged in the finishing yard 5, and 13 denotes the center position (+) in the width and length directions of each steel plate.
As shown in FIG. 3, each coordinate of the center 13 of the steel plate is represented by ((X1 + X2) / 2, (Y1 + Y2) / 2), and this coordinate is obtained by connecting each steel plate 12 to the finishing yard 5 with an overhead crane. It is the position (coordinates) of the center 4 of the overhead crane 1 when it is suspended.

  Therefore, the coordinate points (X1, Y1), (X1, Y2), (X2, Y1), and (X2, Y2) of the four corners of each steel plate are known for the width and length dimensions of each steel plate 12 before gas cutting. Therefore, it can be derived by calculation. As described above, the placement position of the finishing yard 5 of each steel plate 12 can be displayed on the XY coordinate axis, and the location of the steel plate can be tracked.

  Next, the non-fixed type storage management method for the finishing yard according to the present invention will be described with reference to the flowchart shown in FIG.

  S11: As shown in FIGS. 4 and 6, the finishing yard management PC is adjusted by the coordinates partitioned in a lattice shape so as to coincide with the traveling direction of the XY axis of the overhead crane 1 of the finishing yard 5 as shown in FIGS. And the movement of the overhead crane 1 can be displayed.

  S12: The surface area occupied in the place where each steel plate is placed is calculated based on the rolling dimension of the steel plate scheduled to be carried into the finishing yard.

  S13: The arrangement location and arrangement order of the steel plates are determined from the calculated occupation area of each steel plate and transmitted to the overhead crane 1 together with the steel plate number of each steel plate.

  S14: The coordinates of the center position 13 of the steel plates arranged in the finishing yard are registered in the finishing yard management PC together with the steel plate number as the finishing yard position coordinates of the steel plate.

  S15: The work result is input. Particularly in gas cutting, when the number of cut sheets increases due to steel sheet cutting, the number and dimensions thereof are input.

  S16: When the number of cutting plates increases by gas cutting, the coordinates of the four corners of the steel plate 12 and the coordinates of the steel plate center 13 are calculated from the setting of the new steel plate number of the increased cutting plate and the dimensions of each steel plate, The coordinates of the steel plate center 13 of each steel plate are determined as new coordinates and registered together with the steel plate number. This step is the most effective step of the present invention. Of course, in the case where there is no increase in the number of cut plates even in the fine yard work such as the care of the steel plate, step 16 is skipped.

  S17: When the refining work is finished, the steel sheet is unloaded. When the steel plate is lifted by the overhead crane 1, the current position coordinates of the crane 1, the coordinates registered in each steel plate, and the steel plate number are checked for confirmation. This step is a step of confirming the steel plate to be carried out and the steel plate (actual product) placed in the finishing yard based on the finishing yard position coordinates and the steel plate number, thereby preventing foreign materials from being mixed.

  S18: When collation is completed, it is lifted by an overhead crane and paid to the next process.

  S19: The placement information occupied by the discharged steel sheet is emptied, and preparation for receiving the next steel sheet is started.

  Next, the steel sheet tracking method in the finishing yard of the present invention will be described using the flowchart shown in FIG.

  S31: From the previous process by importing the specification information (steel plate number, rolling dimension, cutting method, cutting size, number of cuts, designation of maintenance method, judgment criteria, etc.) of the steel sheet to be brought into the finishing process into the finishing yard management PC. In-situ confirmation and tracking of the steel sheet that is brought into the refining process is started.

S32: The position coordinates and the order of arrangement of the finishing yards are determined from the calculated occupation area of each steel plate.

  S33: Instructing the steel plate number, dimensions, weight, and arrangement planned position coordinates of the steel plate to be suspended from the overhead crane, and carrying it.

  S34: The steel plate is lowered to the designated position, and the coordinate of the steel plate center 13 arranged in the refinement yard is registered in the refinement yard management PC together with the steel plate number as the refinement yard position coordinate of the steel plate.

  S35: The work result is input. Particularly in gas cutting, when the number of cut sheets increases due to steel sheet cutting, the number and dimensions thereof are input.

  S36: When the number of cut plates increases due to gas cutting, the coordinates of the four corners of the steel plate 12 and the coordinates of the steel plate center 13 are calculated from the setting of the new steel plate number of the increased cut plate and the dimensions of each steel plate. The coordinates of the steel plate center 13 are determined as new coordinates and registered together with the steel plate number. This step is the most effective step of the present invention. Of course, step 36 will be skipped in the case where there is no increase in the number of cut plates even in the precision yard work such as steel plate care.

  S37: When the refining work is completed, the steel sheet is unloaded. When the steel plate is lifted by the overhead crane 1, the current position coordinates of the crane 1, the registered coordinates of each steel plate and the steel plate number are collated for confirmation. This step is a step of confirming the steel plate to be carried out and the steel plate (actual product) placed in the finishing yard based on the finishing yard position coordinates and the steel plate number, thereby preventing foreign materials from being mixed.

  S38: When collation is completed, it is lifted by an overhead crane and paid to the next process.

  Examples of the present invention will be described below.

The non-fixed type storage management method for a finishing yard according to the present invention was applied to a gas cutting station for a thick steel plate.
One scale on the X axis was approximately 2 m, and one scale on the Y axis was approximately 1 m. One of the test steel plates is a plate number AA100, standard SM490, size 45 × 2000 × 8000 mm, and two steel plates are each a plate number BB200, standard SM490, size 50 × 3000 × 16000 mm.

FIG. 7 shows an example in which the respective steel plates are arranged in the gas cutting field. The center coordinate of the single steel plate AA100 is (003, 02), that is, the X-axis is 003 and the Y-axis is 02, and the placement address of the steel plate is displayed as 00302. One steel plate is used, and the gas cutting is performed only at the tip and tail ends. After the gas cutting operation is completed, the placement address is not changed to 00302, and the steel plate number remains AA100 and is not changed.

  On the other hand, the steel plate number BB200 is a two-piece steel plate, and two steel plates having a size of 50 × 3000 × 8000 mm are collected from the original size 50 × 3000 × 16000 mm after gas cutting. In this case, the steel plate number before gas cutting is BB200, the steel plate center coordinates are (006, 06), and the place address is displayed as 00060. After gas cutting the steel plate, the steel plate number is changed to BB20001, BB20002, and the center coordinates of the respective steel plates are (004, 06) and (008, 06), so the placement addresses of each steel plate are 00406 and 00806. Is displayed.

  When the placement management of the finishing yard 5 is performed by the method of the present invention, the steel plate placement is always grasped together with the steel plate number on the XY axis, so that the steel plate tracking is performed reliably and relies on the memory of the operator. Work is eliminated and mistakes such as mixing of different materials can be prevented.

  When the coordinate setting method of the present invention is employed, non-fixed placement management can be applied to articles other than steel plates.

It is a flowchart explaining the non-fixed-type storage management method. It is a flowchart explaining the tracking method of the steel plate in a finishing yard. It is a figure explaining the refined yard position coordinate of a steel plate. It is a figure explaining the example of a finishing yard. It is a figure explaining the example of steel plate lifting in an overhead crane. It is a figure explaining the example which displayed the refined yard by XY coordinate on PC. It is a figure explaining one Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Overhead crane 2 Garter 3 Track 4 Crane center 5 Adjusting yard 6 Virtual XY coordinate 11 Lifting magnet 12 Steel plate 13 Steel plate center a X axis scale b Y axis scale

Claims (2)

In an off-line gas cutting station attached to a thick steel plate rolling line ,
(A) After rolling, on the coordinates where the gas cutting field is partitioned in a grid by the XY coordinates, which coincide with the XY axis traveling direction of the overhead crane registered in the finishing yard management process computer , Using the steel plate number and rolling dimensions (width, length) of the steel plate to be carried into the gas cutting field, determining the arrangement planned position coordinate ( coordinate of the steel plate center) of the steel plate to be carried in and the coordinates of the four corners of the steel plate ; ,
( B) After the next material, determining the arrangement position coordinates of the already arranged steel plates, repeating the step (A), and determining the arrangement position position coordinates of the steel plates to be loaded ;
(C) The steel plate number of the steel plate to be lifted by the overhead crane, the rolling dimensions (width and length), the arrangement position coordinates ( coordinates of the steel plate center), and the coordinates of the four corners of the steel plate are transmitted to the overhead crane to instruct lifting. Process,
(D) lowering the steel plate to the indicated position and registering the arrangement position coordinates of the arranged steel plates;
(E) from each steel plate arranged in the gas cutting field, gas cutting the cut plate (rectangle) according to the cutting method of specification information, cutting dimensions, the number of cuts;
(F) When collecting a plurality of steel plates (cut plates (rectangular)) from a rolled steel plate by gas cutting, a new steel plate number is assigned to each cut plate instead of the rolled steel plate number, and the width of each cut plate Calculating the coordinates of the steel plate center position of each cut plate and the coordinates of the four corners of the steel plate from the length dimension, and registering the steel plate center coordinates of each cut plate together with the steel plate number as an array position coordinate ;
(G) After completion of gas cutting , a step of collating the steel plate number of the steel plate to be carried out to the next step, the arrangement position coordinates and the overhead crane lifting position coordinates;
(H) Lifting a steel plate with an overhead crane, paying it out to the next process, and registering that the place (array position coordinates) is acceptable for the next material. Formula storage management method. In an off-line gas cutting station attached to a thick steel plate rolling line ,
(A) After rolling, on the coordinates where the gas cutting field is partitioned in a grid by the XY coordinates, which coincide with the XY axis traveling direction of the overhead crane registered in the finishing yard management process computer, Using the steel plate number and rolling dimensions (width, length) of the steel plate to be brought into the gas cutting field, the planned arrangement position coordinates ( coordinates of the steel plate center) of the steel plates to be carried in and the coordinates of the four corners of the steel plates are determined and tracking is performed. Starting the process;
( B) After the next material, determining the arrangement position coordinates of the already arranged steel plates, repeating the step (A), and determining the arrangement position position coordinates of the steel plates to be loaded ;
(C) The steel plate number, rolling dimensions (thickness, width, length ) of the steel plate to be lifted by the overhead crane, the planned arrangement position coordinates ( coordinates of the steel plate center), and the coordinates of the four corners of the steel plate are transmitted to the overhead crane for lifting. An instruction process;
(D) lowering the steel plate to the indicated position and registering the arrangement position coordinates of the arranged steel plates;
(E) from each steel plate arranged in the gas cutting field, gas cutting the cut plate (rectangle) according to the cutting method of specification information, cutting dimensions, the number of cuts ;
(F) When a plurality of steel plates ( cut plates (rectangular)) are obtained from the rolled steel plate by gas cutting, a new steel plate number is assigned to each cut plate instead of the rolled steel plate number, the width of each cut plate , Calculating the coordinates of the steel plate center position of each cut plate and the coordinates of the four corners of the steel plate from the length dimension, and registering the coordinates of the steel plate center of each cut plate together with the steel plate number as array position coordinates ;
(G) After completion of gas cutting , a step of collating the steel plate number of the steel plate to be carried out to the next step, the arrangement position coordinates and the overhead crane lifting position coordinates;
(H) A method for tracking a steel plate in a gas cutting station, comprising: lifting a steel plate with an overhead crane, paying it out to the next step, and ending tracking.

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