JP2015189520A - Method of managing storage space of thick steel plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of managing a storage space with few rearranging operations.SOLUTION: In a method of managing a storage space of thick steel plates, in a caring process of surface flaws generated in the production of the thick steel plates and when the thick steel plates received by the caring process are stacked in the storage space before the caring, a caring load code, an emergency code, a processing date difference code, and an important product code applied to each thick steel plate are converted into points, a preferential order of each thick steel plate is guided to an operator based on a total sum of the points, and a stacking location of the storage space is determined.

Description

  The present invention relates to a storage management method for manual entry of thick steel plates.

  In a predetermined process for receiving an intermediate product generated in the middle of the manufacture of a steel product, storage management is performed to temporarily store the intermediate product in a storage space provided in a predetermined space in the factory. When plate-like articles such as thick steel plates are temporarily stored in a factory, they are often piled up in a storage area. In that case, the plate-like article can be placed as a single mountain for each lot if there is room in the placement, but in many cases, a plurality of lots are stacked from the viewpoint of placement efficiency. As a result, the work of transshipment of lots from mountain to mountain, so-called transfer work, occurs frequently and the work efficiency is impaired. Therefore, several storage management methods have been proposed.

  Patent Document 1 discloses a method for determining an optimal crane unloading destination in consideration of specifications such as a contract number, product type, dimensions, packing style, and transportation form of a cut plate product.

  Further, Patent Document 2 discloses that a lot of articles whose plate-like articles are larger than a predetermined quantity are directly stacked without being stacked on top of other lots, and other lot articles have a predetermined lot number. A method of stacking on less than a mountain is disclosed.

JP-A-6-179525 JP 2000-226123 A

  The above-mentioned patent document discloses a method for determining a suitable place in consideration of the product type, dimensions, packing style, transportation form, etc., and for mounting the same mountain as much as possible for each lot taken out at the time of shipment. However, in the maintenance of thick steel plates, it is important to determine the crest location of the storage according to the priority order in consideration of the load (working time) required for maintenance and the delivery date, etc. Fast rush materials and late delivery materials with a lower priority order are mixed, resulting in frequent replacement work.

  An object of the present invention is to provide a storage location management method that requires less relocation work.

  In order to solve the above-mentioned problems, the present invention points the priority to be processed for thick steel plates, and stacks high-thick steel plates with high priority to high-priority thick steel plates and priority. It is possible to prevent mixing of low-order steel plates, reduce the number of replacement work, and improve the workability of the crane.

  In order to solve the above-mentioned problem, the present invention points to the priority order to be processed of thick steel plates, and stacks high-thick steel plates with high priority peaks to give priority to thick steel plates and priority. Prevents the mixing of steel plates with low order, reduces replacement work, and improves crane workability.

  The gist of the present application is as follows.

  [1] In a care process for surface defects generated in the manufacture of thick steel plates, when the thick steel plates received in the care process are piled in a storage place before maintenance, a care load code given to each thick steel plate, An emergency code, a processing day range code, and a priority product code are pointed, and the priority order of each steel plate is guided to the operator from the point total point, and the pile position of the storage site is determined. Place management method.

  [2] The care load code has 5 points for “heavy care”, 3 points for “medium care”, 1 point for “light care”, and 10 points for “S” and 5 for “Z”. The point “A” is 1 point, “blank” is 0 point, and the processing day difference code is “−5 days or less” 10 points, “−4 to +1 day” 5 points, “+2 to +5 days” [1] The steel plate storage management method according to [1], wherein 1 point “+5 days exceeded” is 0 points, and the priority product code is “Yes” is 5 points and “None” is 0 points.

  Since the present invention can prevent the mixing of high-priority thick steel plates and low-priority thick steel plates, the replacement work in the yard is reduced and the workability of the crane is improved.

  In addition, since the transfer work is reduced, in-process processing can be promoted, and there is a rationalization effect by shortening the lead time and reducing inventory.

It is a figure explaining the conveyance flow of the thick steel plate until manual entry. It is the figure which compared the frequency | count of replacement in a prior art example and an invention example. It is the figure which compared the oyster crease / reed generation rate of the manual thickness steel plate in a conventional example and an invention example.

  An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing the entire care process. The thick steel plate 1 sent to the shear line 7 detects surface wrinkles with the surface wrinkle detection device 2, and a manual load code is input into the inspection room 3. It is sent to a finishing line (No. 1) 9 through 1 transfer 4. The thick steel plate 1 is transported on the finishing line (No. 1) 9 and the thick steel plate 1 requiring care is No. 1. 2 is sent to the transfer 5 and the maintenance-free thick steel plate is sent down the finishing line (No. 1) 9 to the product yard or the next process (ultrasonic inspection or the like).

  No. 2 The thick steel plate 1 sent to the transfer 5 is piled up at the pile place of the storage place according to the points displayed in the care management room. The steel plate 1 that has been maintained at the entrance 11 is fried on a finishing line (No. 2) 8 and is no. It is sent to the next process through 3 transfer 6.

  The priority order is converted into points using the maintenance load code, emergency code, processing date range code, and priority product type code, and the total number of points is used to select the yard to be piled up and to guide the operator. Replacement work is reduced and the workability of the crane is improved.

  As an index to guide the place to be piled up in the steel plate maintenance, the maintenance load code is 5 points for "heavy care", 3 points for "medium care" and 1 for "light care" As points, turn into points. Here, when the surface defect is inspected 3 before the entrance 11 and it is determined that there is a surface defect and needs to be treated, it is transported to the entry area 11. The surface wrinkles detected by the surface wrinkle detection device 2 are divided into three stages according to the care load.

  The emergency code is pointed with “S” as 10 points, “Z” as 5 points, “A” as 1 point, and “blank” as 0 point. Here, it is determined that the priority is high in the order of “blank” <“A” <“Z” <“S”, and the degree of urgency is coded.

  The processing date range code is 10 days for “-5 days or less”, 5 points for “−4 to +1 day”, 1 point for “+2 to +5 days”, and 0 point for “+5 days or more”. This is a point of margin. Here, the processing date difference indicates the date (processing date) that should be completed in consideration of the date to be shipped and the difference between today and "-5 days or less" is the date that should be processed. In contrast, it represents a delay of 5 days or more.

  The priority product type code is a point indicating whether or not there is a priority product, with “Yes” being 5 points and “None” being 0 points. Here, the priority product type code is set in advance as specifications, and the “present” code is added to the priority product type.

  The points of the above codes are not fixed and can be changed according to the situation, and are constants in the process computer.

  The priority order of the steel plates is determined from the total value of the assigned points, and the operator is instructed where to place the piles. The yard (mountain) to be crested is a general processing mountain for steel plates with 1 to 10 points in total points, an emergency processing mountain for steel plates with 11 to 20 points, and a super emergency processing mountain for steel plates with 21 to 30 points, Guiding the mountain to the worker. It should be noted that the mountain point to be crested can be changed and is a constant in the process computer. The priority order of each processing mountain is arbitrarily set in the process computer in advance, reflecting the state of mountain mounting on that day.

  FIG. 1 shows a transport flow of a thick steel plate until manual entry. When the thickness of the thick steel plate 1 is determined by the surface wrinkle detection device 2 in the shear line (B line) 7 and needs to be cared for, the No. 1 line from the finishing line (F line) 9 3 is received by the transfer 5 and is piled up at the yard 10 by a crane.

  In the present invention, the finishing line (F line) 9 to No. 3 When the transfer is accepted, the points are calculated from the various codes of the steel plate and the total points and breakdown are sent from the process computer to the care management room. From the points, determine the location of the storage 10 with a mountain.

The breakdown of the points of each steel plate is as follows: (1) The care load code is “heavy care”: 5 points, “medium care”: 3 points, “light care”: 1 point.

  (2) The emergency code is “S”: 10 points, “Z”: 5 points, “A”: 1 point, “blank”: 0 points.

  (3) The processing date range code is “−5 days or less”: 10 points, “−4 to +1 day”: 5 points, “+2 to +5 days”: 1 point, “+5 days or more”: 0 points. .

  (4) The priority product type code is “Yes”: 5 points, “None”: 0 points.

  From the total value of the allocated points, 0 to 10 points are added to the general processing mountain, 11 to 20 points are emergency processing mountains, and 21 to 30 points are super-emergency processing mountains.

  Carry thick steel plates from the highest priority mountain into the entrance 11 to clean the surface flaws. After the maintenance is completed, the thick steel plate is lifted to the finishing line (E line) 8 and discharged from the No. 6 transfer 6 to the next process.

  The total points of the above-mentioned peaks can be increased depending on the situation and are constants in the process computer. The priority order of each processing mountain is arbitrarily set in the process computer in advance, reflecting the state of mountain mounting on that day.

  For example, if the maintenance load code is “heavy care”, the emergency code is “S”, the processing date range code is “−5 days or less”, and the priority product code is “Yes”, the total points will be 30 and the super emergency processing A mountain is attached to the mountain. Also, in the super emergency processing mountain, when the priority order is set by A> B and the process control, the mountain A is added.

  FIG. 2 shows a comparison between the conventional example of the number of times of replacement at the storage site and the invention example. In the past, the replacement was performed 2.3 times per thick steel plate, but in the example of the present invention, it was reduced to 0.9 times. Further, as shown in FIG. 3, since the number of times of replacement per one thick steel plate is reduced, the occurrence rate of oysters and prickles is also reduced by 1.7%.

1 Thick steel plate 2 Surface wrinkle detection device 3 Inspection room 4 No. 1 transfer 5 No. 2 transfer 6 No. 3 transfer 7 Shearing line 8 Refinement line (No. 2)
9 Refinement line (No.1)
10 Place 11 Hand entrance

Claims (2)

  In the care process of surface flaws that occur in the production of thick steel sheets, when loading the thick steel sheets received in the care process on the storage site before maintenance, care load codes assigned to each thick steel sheet, emergency codes, The steel plate storage management method characterized in that the processing date range code and the priority product type code are pointed, and the priority order of each thick steel plate is guided to the operator from the point total point, and the crest location of the storage site is determined. .   The care load code is 5 points for “heavy care”, 3 points for “medium care”, 1 point for “light care”, and 10 points for “S” and 5 points for “Z” “A” ”Is 1 point,“ blank ”is 0 point, and the processing day difference code is 10 points for“ −5 days or less ”, 5 points for“ −4 to +1 day ”, and 1 point for“ +2 to +5 days ”. The heavy steel plate storage management method according to claim 1, wherein “+5 days exceeded” is 0 points, and the priority product type code is “Yes” is 5 points and “None” is 0 points.