JP5444801B2 - Method and apparatus for preparing a plan for charging steel sheet products into a heat treatment furnace - Google Patents

Description

  The present invention relates to a steel product input plan preparation method and an input plan preparation device.

  There are techniques disclosed in Patent Document 1 or Patent Document 2, for example, as techniques related to the creation of an input plan for plate-like steel products.

  The technology disclosed in Patent Literature 1 is a technology related to a method for managing the location of intermediate products generated in a production process of a steel product composed of a plurality of steps, and the technology disclosed in Patent Literature 2 is a method for producing a steel plate. In particular, the present invention relates to a technique related to processing when steel plates stacked in a yard are put into a heat treatment furnace. Both technologies target intermediate products that are brought in from manufacturing equipment upstream from the target equipment, and are so-called push-type production plans in which the upstream side pushes it downstream for its own convenience.

  Further, Patent Document 3 discloses a technique that can efficiently process a work requiring heat treatment, in particular, regarding a production method in an FMS including heat treatment equipment. In order to adjust the balance between the bottleneck process (heat treatment) and the other processes that have a long production time, for orders with earlier delivery dates, start production from the upstream process, and for orders with the latest delivery dates, use heat-treated stock. The idea is to start from the post-process.

JP 2005-228165 A JP 2005-307347 A JP 2000-280146 A

  The steel industry is a process branching industry. In other words, a manufacturing method is adopted in which materials that are gathered in the upstream process in pursuit of economies of scale are distributed to multiple downstream processes and further created, and finally finished as products according to the specifications of the customer. Yes.

  However, the demands of consumers are diversified and multi-product production is required, and push-type production plans such as the technology disclosed in Patent Document 1 or Patent Document 2 described above, which are suitable for mass production of the same product, are excessively summarized. There was a problem that manufacturing was easy to occur and the inventory of intermediate products and products increased.

  Moreover, even if the technique disclosed in the above-mentioned Patent Document 3 is applied, in the steel industry that processes orders with various dimensions and chemical components, it is difficult to pre-manufacture appropriate heat-treated stocks. There was a problem.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method and an apparatus for creating a plan for introducing a steel product into a heat treatment furnace that can suppress an increase in inventory of intermediate products and products. .

The above problem can be solved by the following means.
[1] Situation input processing step for inputting order information including sheet thickness and delivery date for each intermediate product and the storage location and stacking order of unprocessed intermediate products that have already been placed in the storage space ;
An input plan creation processing step that determines the order of input to the heat treatment furnace for both the unprocessed intermediate product that has been transferred into the storage area and the unprocessed intermediate product that has not been transferred ,
From the scheduled input time added to the unprocessed intermediate product that has not been carried in in the loading plan creation processing step, the upstream process of the unprocessed intermediate product site that has not been transported is taken as the upper process, and transferred from the upper process to the storage site An acceptance time request processing step for outputting a payout request time for the upper process after reducing the time;
When receiving unprocessed intermediate products that have not been delivered to the storage site, if the attributes such as plate thickness, processing temperature, and processing method are similar, the same storage site is specified to determine the storage location. Steps,
A method of creating a plan for charging a steel sheet product into a heat treatment furnace having a charging instruction processing step for giving a manufacturing instruction for charging the intermediate product from the yard into the heat treatment furnace,
The input plan creation processing step, a value obtained by adding by multiplying a weighting factor to each of the two evaluation values of the thickness difference evaluation before material and processing scheduled material of tardiness evaluation and scheduled processing material processing scheduled material A method for creating a plan for charging a steel sheet into a heat treatment furnace, characterized by using an evaluation index for the delivery date of the plan and the efficiency of the heat treatment process .

[2] In the method for creating a plan for charging the steel sheet product into the heat treatment furnace according to [1] above ,
The closing planning process step, to the product group processing attribute is for similar equal, put planning how to heat treatment furnace of the plate-shaped steel products, which comprises adding the same attribute code.

[3] Situation input processing means for inputting order information including sheet thickness and delivery date for each intermediate product, and storage location and stacking order of unprocessed intermediate products that have been placed in the storage area;
An input plan creation processing means for determining the order of input to the heat treatment furnace for both the unprocessed intermediate product that has been transferred into the storage area and the unprocessed intermediate product that has not been transferred ,
From the scheduled input time added to the unprocessed intermediate product that has not been carried in in the loading plan creation processing step, the upstream process of the unprocessed intermediate product site that has not been transported is taken as the upper process, and transferred from the upper process to the storage site An acceptance time request processing means for outputting a payout request time for the upper process after reducing the time;
When receiving unprocessed intermediate products that have not been delivered to the storage site, if the attributes such as plate thickness, processing temperature, and processing method are similar, the same storage site is specified to determine the storage location. Means,
An apparatus for creating a plan for charging a steel sheet product into a heat treatment furnace comprising a charging instruction processing means for giving a manufacturing instruction for charging an intermediate product from a storage site into the heat treatment furnace,
The input plan creation processing means, a value obtained by adding by multiplying a weighting factor to each of the two evaluation values of the thickness difference evaluation before material and processing scheduled material of tardiness evaluation and scheduled processing material processing scheduled material An apparatus for creating a plan for charging a steel sheet into a heat treatment furnace, characterized by using an evaluation index for the delivery date of the plan and the efficiency of the heat treatment process .

[4] In the apparatus for creating a plan for introducing the steel sheet product into the heat treatment furnace according to [3] above ,
The input plan creation processing unit, to the products which process attributes are for similar equal, put planning equipment to the heat treatment furnace of the plate-shaped steel products, which comprises adding the same attribute code.

  According to the present invention, the processing order of products is planned as a plan and output as a manufacturing instruction for the upstream equipment while assuming the processing of the storage unit and the product stacking order in the storage site. It was possible to suppress the increase and shorten the manufacturing period.

  In addition, there is also an effect of continuously and expanding the effect by periodically correcting the plan to reflect the difference between the plan and the actual result.

It is a figure which shows the example of the whole process sequence which concerns on this invention. It is a figure which shows the apparatus structural example which concerns on this invention. It is a figure which shows the example of a detailed process flow in an input plan creation process. It is a figure which shows an example (place placement allocation) of the result of an input plan. It is a figure which shows the example of the re-planning start time when a condition changes from the last plan. It is a figure which shows the example of the re-planning result with respect to FIG. It is a figure which shows typically the installation made into object by a present Example. It is a figure which shows an example of the data content of an order file. It is a figure which shows an example of the data content of a placement state file. It is a figure which shows an example of the data content of a placement allocation file. It is a figure which shows an example of the data content of an acceptance request time file. It is a figure which shows an example of the data content of an input plan file.

  The form for implementing this invention is demonstrated below. FIG. 2 is a diagram showing a configuration example of an apparatus according to the present invention. In the figure, reference numeral 1 denotes a sheet steel product input plan creation device, 2 denotes a database, 3 denotes a terminal, and 4 denotes a distribution device.

  The plate-like steel product input plan creation device 1 plans the handling procedure for the plate-like product or intermediate product while exchanging data with various files in the database 2, displays it on the terminal 3, and handles it. An instruction is sent to the logistics equipment 4 such as a crane that manages the product, and the product storage operation is performed based on the instruction.

  FIG. 1 is a diagram showing an example of the entire processing procedure according to the present invention. As shown in the figure, the process proceeds while the processes of Step 01 to Step 05 are sequentially performed from the start to the end. In the middle of processing, exchange of data with a plurality of files (order file, placement status file, placement allocation file, acceptance time request file, loading plan file, loading instruction file) stored in the database 2 shown in FIG. While processing.

  FIG. 8 is a diagram showing an example of the data content of the order file, which includes order id (order number), plate thickness, dimension classification, temperature, and delivery date information. In the processing at the target facility, the succession of similar plate thickness and similar temperature contributes to the efficiency improvement. The dimension classification defines the size of the storage area (length and width, corresponding to the width of the order), and orders with the same size classification are arranged for effective use of storage space. FIG. 8 shows an example in which a total of three orders are registered.

  FIG. 9 is a diagram illustrating an example of the data content of the placement state file. 9 includes data on the placement code, dimension classification, and number of sheets. FIG. 9 shows an example in which two orders are placed in two places.

  FIG. 10 is a diagram illustrating an example of the data contents of the placement allocation file. Includes information on order id (order number), place code, product order, and delivery sign. The position of each order is specified by the placement code and the product order, and whether the order has been loaded or not is identified by the loading sign. The placement code and product order of one undelivered piece (order id: C) in FIG. 10 are information newly added in the input plan creation process.

  FIG. 11 is a diagram illustrating an example of data contents of the acceptance request time file. Includes order id (order number) and acceptance request time information. The unloaded material to be loaded in the future is stored as an acceptance request time obtained by subtracting the transfer time from the scheduled loading time. This is used as a payout request time for the upper process. FIG. 11 shows an example in which the request acceptance time for one unloaded material (order id: C) is stored.

FIG. 12 is a diagram showing an example of the data content of the input plan file. The input plan file includes the processing order, order id, and input plan time. FIG. 12 shows an example in which the processing order of three orders is stored. The order is not yet carrying material id: For C, and save it to accept the request time file a 04:30 obtained by subtracting the three hours between the time of transfer from the input scheduled time 7:30 as acceptance request time. Then, the data of the input plan file is output to the input support file by the input instruction process.

  Note that some or all of these files are not stored in the database 2 of the external storage device of the sheet steel product input plan creation device 1, but are stored in the internal storage device of the plate steel product input plan preparation device 1. The form may be stored in the memory.

  First, in the Step 01 status input process, the order information, the storage location of the unprocessed intermediate product in process and the stacking order are input. Next, in Step 02 input plan creation processing, the processing order is determined for both in-process intermediate products and unarrived intermediate products.

Then, in Step03 acceptance time request processing, and outputs a payout request time against the upper step on minus between when transported from input scheduled time obtained by adding the non-arrival intermediate product on step02. In addition, Step04 yard in a new acceptance process, to determine the storage field office at the time of acceptance of the non-arrival intermediate product in yard. In the final Step 05 input plan process, a work instruction for processing the intermediate product is created from the storage location.

According to the present invention,
Enter order information and placement status data, and refer to the placement status of the unprocessed intermediate products that have been delivered at multiple locations on the target equipment entry side, that is, the placement number and product order,
For intermediate products that have not been imported, refer to the manufacturing progress status, that is, information such as manufacturing instructions not yet created / manufactured instructions not yet manufactured, manufactured but not imported, etc.
Determine the processing order at the target equipment for all intermediate products that have been loaded and not loaded based on the operation method that processes continuously for each storage site,
For the intermediate products that have been manufactured and have not yet been delivered, the storage order should be assigned with reference to the above processing order, and the manufacturing instructions have been created for products that have not yet been produced.
It has become possible to realize a processing order that can improve efficiency while maintaining a situation in which restrictions on changing the product order for crane work are unlikely to occur.

  FIG. 7 is a diagram schematically showing the equipment targeted in this embodiment. In the figure, 10 represents a heat treatment furnace and 11 represents a steel plate.

  In the heat treatment step, as shown in FIG. 7, the heat treatment furnace 10 is configured as a one-way transfer system, and a plurality of steel plates 11 to be heat treated are sequentially introduced from the entry side of the heat treatment furnace 30. Then, when the steel plate on the most exit side in the heat treatment furnace 30 reaches a predetermined temperature, the steel plate is extracted. After the steel plate is extracted, the work of pre-packing the steel plate in the heat treatment furnace 30 and putting the subsequent steel plate into the empty space is repeated.

  In the heat treatment process, parameters such as temperature, plate thickness, shape (length, width), etc. can be set as processing attributes for the steel plate 11 to be processed. Here, focusing on temperature and plate thickness as important parameters, for example, The temperature is divided into a predetermined number such as a temperature of 5 and a plate thickness of 4 respectively. And by continuously performing the heat treatment of the steel plates belonging to the same processing attribute, the setup time associated with the heat treatment can be minimized, and the production amount in the heat treatment process can be increased.

  When heating a plurality of steel plates present simultaneously in the heat treatment furnace 30, it is desirable to heat them at a uniform temperature. However, even if the temperatures are not completely the same, it is acceptable if the temperature difference between the plurality of steel plates is within a predetermined range. When a temperature difference becomes large when heating a plurality of steel plates, it is necessary to change the atmosphere temperature in the heat treatment furnace, and operations such as temperature increase / decrease are performed. In this case, since a setup time of about several tens of minutes to several hours is required to raise and lower the temperature, the production amount in the heat treatment process is reduced by that amount.

  Moreover, it is desirable that the furnace times of a plurality of steel plates simultaneously existing in the heat treatment furnace 30 be as uniform as possible. If there is a plurality of steel plates that have a longer in-furnace time than others, all the steel plates are rate-controlled by the steel plate with the lowest efficiency, and the production amount of the heat treatment process decreases. Since the in-furnace time strongly depends on the plate thickness of the steel plate, it is desirable in terms of efficiency that the plate thickness of the plurality of steel plates is substantially the same or within a predetermined allowable range because no waiting time occurs. In consideration of high-efficiency operation, placement in the yard is done in groups with similar thickness. For example, if the plate thickness is 30 mm or less, the intermediate product group included in the range of ± 10 mm is made the same group.

  When a steel plate prior to the heat treatment process is placed in each place, handling is performed in units of common processing attributes. Since a crane is used for handling the steel plate 11, if steel plates that cannot be put into the heat treatment furnace 30 are mixed, it is necessary to sort the steel plates in the heat treatment step. As a result, the heat treatment furnace enters a state of waiting for the introduction of the steel sheet and an opportunity loss occurs. Therefore, the steel sheet is handled in units of processing attributes in order to avoid such a situation.

  FIG. 3 is a diagram illustrating an example of a detailed process flow in the input plan creation process. Here, an input plan is created for both intermediate products that have already been transferred to the storage site and for each intermediate product that has been transferred.

  The input plan can be a completely new input plan or a re-plan from the previous plan. Therefore, after inputting data in Step 102 and Step 103, first, it is identified whether it is new or re-planning (Step 104). Further, in the case of re-planning, there is a possibility that there is a part that is already in operation and cannot be re-planned for the most recent plan (Step 105). For these fixed plan parts, the process is started by designating a fixed plan sign, and the end of the process is identified as the starting point of subsequent plans (Step 106). If there is no fixed part, a virtual order is set as the starting point of the plan (Step 107).

  In Step 108, the priority order of the processing is evaluated using the evaluation value obtained by adding the weighted evaluation of the delivery delay evaluation and the thickness difference evaluation between the previous material and the current material, and sequentially arranges them. Here, for the evaluation of the storage unit that has been loaded, in this embodiment, the earliest delivery date and the average plate thickness are used, but another method of taking an average of different delivery dates may be adopted.

  As a constraint condition, there is an earliest processable time for an undelivered intermediate product. Then, a solution that satisfies this restriction is searched. The same placement code is added to consecutive unloaded materials whose attributes such as plate thickness, processing temperature, processing method, etc. are similar to the input plan result obtained by the search (Step 110). In step 112, the input plan is output to a file, and the series of processing ends.

  FIG. 4 is a diagram showing an example (placement allocation) of the result of the input plan. In the figure, the black dots represent the intermediate products, the horizontal axis represents the loading order, the vertical axis represents the plate thickness, and the portions surrounded by broken lines indicate the same placement or the same placement code.

  FIG. 5 is a diagram illustrating an example of a re-planning start time when the situation has changed from the previous plan. In the figure, □ indicates emergency materials added since the previous plan, and the dotted circle indicates products that are no longer scheduled for delivery. In this way, in the re-planning, an emergency material input is interrupted based on the initial plan, and a plan reflecting the change of the carrying-in schedule is made.

  FIG. 6 is a diagram illustrating an example of a re-planning result for FIG. Because the thickness of the emergency material is large, the unloaded material group, which was the same group in the previous plan, is divided into multiple groups, and the order of sandwiching the front and back of the emergency material is changed to reduce the thickness difference. A replanning result is obtained.

DESCRIPTION OF SYMBOLS 1 Sheet steel product input plan preparation device 2 Database 3 Terminal 4 Logistics equipment 10 Heat treatment furnace 11 Steel plate

Claims (4)

A status input processing step for inputting order information including the thickness and delivery date of each intermediate product and the storage location and stacking order of unprocessed intermediate products that have been placed in the storage area;
An input plan creation processing step that determines the order of input to the heat treatment furnace for both the unprocessed intermediate product that has been transferred into the storage area and the unprocessed intermediate product that has not been transferred ,
From the scheduled input time added to the unprocessed intermediate product that has not been carried in in the loading plan creation processing step, the upstream process of the unprocessed intermediate product site that has not been transported is taken as the upper process, and transferred from the upper process to the storage site An acceptance time request processing step for outputting a payout request time for the upper process after reducing the time;
When receiving unprocessed intermediate products that have not been delivered to the storage site, if the attributes such as plate thickness, processing temperature, and processing method are similar, the same storage site is specified to determine the storage location. Steps,
A method of creating a plan for charging a steel sheet product into a heat treatment furnace having a charging instruction processing step for giving a manufacturing instruction for charging the intermediate product from the yard into the heat treatment furnace,
The input plan creation processing step, a value obtained by adding by multiplying a weighting factor to each of the two evaluation values of the thickness difference evaluation before material and processing scheduled material of tardiness evaluation and scheduled processing material processing scheduled material A method for creating a plan for charging a steel sheet into a heat treatment furnace, characterized by using an evaluation index for the delivery date of the plan and the efficiency of the heat treatment process . In the method of creating a plan for charging the plate-like steel product according to claim 1 into a heat treatment furnace,
In the charging plan creation processing step, the same attribute code is added to a group of products having the same or similar processing attributes. Status input processing means for inputting order information including the thickness and delivery date of each intermediate product and the storage location and stacking order of unprocessed intermediate products that have been placed in the storage area;
An input plan creation processing means for determining the order of input to the heat treatment furnace for both the unprocessed intermediate product that has been transferred into the storage area and the unprocessed intermediate product that has not been transferred ,
From the scheduled input time added to the unprocessed intermediate product that has not been carried in in the loading plan creation processing step, the upstream process of the unprocessed intermediate product site that has not been transported is taken as the upper process, and transferred from the upper process to the storage site An acceptance time request processing means for outputting a payout request time for the upper process after reducing the time;
When receiving unprocessed intermediate products that have not been delivered to the storage site, if the attributes such as plate thickness, processing temperature, and processing method are similar, the same storage site is specified to determine the storage location. Means,
An apparatus for creating a plan for charging a steel sheet product into a heat treatment furnace comprising a charging instruction processing means for giving a manufacturing instruction for charging an intermediate product from a storage site into the heat treatment furnace,
The input plan creation processing means, a value obtained by adding by multiplying a weighting factor to each of the two evaluation values of the thickness difference evaluation before material and processing scheduled material of tardiness evaluation and scheduled processing material processing scheduled material An apparatus for creating a plan for charging a steel sheet into a heat treatment furnace, characterized by using an evaluation index for the delivery date of the plan and the efficiency of the heat treatment process . In the apparatus for creating a plan for charging a plate-like steel product according to claim 3 into a heat treatment furnace,
The charging plan creation processing means adds the same attribute code to a group of products having the same or similar processing attributes, and a charging plan creation device for a plate steel product into a heat treatment furnace.

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