Wide and thick plate automatic assembling method based on parameterization control

Abstract

According to the automatic wide and thick plate assembling method based on parameterization control, multi-target priority parameters such as the yield, the delivery date, the order shortage, the customer priority and the arrival are added in the plate assembling process, and the multi-target priority can be dynamically adjusted; and efficient combination optimization of large-batch products is realized through theoretical analysis and special technical scheme design. According to the method, combination explosion of a feasible plate assembling scheme is coped, key business indexes such as the steel plate assembling yield are remarkably improved, and the plate assembling efficiency is greatly improved.

Description

Technical Field

[0001] This invention belongs to the field of metallurgical and production information technology, and relates to a technical solution for automatic assembly of heavy plates through parameterized control. Specifically, it is applied to the slab parameter planning and billet design stage in the rolling production of heavy plates, assembling orders onto a planned large plate according to requirements such as variety, standard, specification, and delivery status, and calculating the billet size required for the planned large plate. Background Technology

[0002] Currently, steel companies generally organize the production of heavy plates in an order-oriented manner. After receiving a customer order, the company prepares a slab plan and organizes production based on the customer's requirements for the type, standard, specifications, and delivery status of the order. At the same time, the company considers balancing the production organization relationship between small batches of customer orders and large batches of production, surplus slab and material inventory, and customer delivery period.

[0003] Faced with a large volume of diverse, multi-specification, small-batch, and personalized orders, the current reliance on manual plate assembly based on the experience of planning personnel is not only extremely time-consuming and labor-intensive, but also highly dependent on the experience, skill, and sense of responsibility of the planners. This results in low yield rates and insufficient unplanned material input, failing to effectively meet the company's cost reduction and efficiency improvement needs. Furthermore, delays caused by manual plate assembly lead to delivery delays, which in turn reduce customer trust. This reliance on manual plate assembly based on experience has severely hampered the production capacity release of heavy plate production lines in steel enterprises and hindered their development. Summary of the Invention

[0004] In response to the technical problems of low order-process matching, serious resource waste, and difficulty in controlling delivery time in the existing technology of heavy plate manual assembly in steel enterprises, this invention aims to provide a fully automatic, fast, efficient, and configurable automatic assembly method for heavy plates based on parameterized control.

[0005] The technical solution of the present invention: An automatic assembly method for wide and thick plates based on parameterized control includes the following steps: 1) All orders awaiting production within the system are grouped according to the default grouping strategy and the configured grouping strategy to form various order subsets; 2) Within each order subset, based on the request parameters specified by the system operation, two rounds of board assembly are performed sequentially according to the configured rules. The first round of board assembly ensures that the board assembly result of the order has no additional cutting damage and no loss of additional yield. 3) The second round of panel assembly is carried out at the cost of a certain loss in yield, in order to process as many remaining order pieces as possible; 4) After the two rounds of plate assembly are completed, the system displays the set of slab design results of successful plate assembly. Users can select the subset of slab design results to publish for production scheduling from the set of results. The remaining design results are broken down into orders and re-entered into the production scheduling process.

[0006] Furthermore: The default grouping strategy mentioned in step 1) refers to grouping orders by internal steel type, order thickness, and order width, with orders having the same internal steel type, thickness, and width forming a subset of orders.

[0007] Furthermore, the grouping strategy configured in step 1) refers to the user's ability to configure orders to be further refined into smaller groups based on whether they are from the same customer or the same port of arrival, while still satisfying the default grouping strategy.

[0008] The system operation specified request parameters mentioned in further step 2) include common configuration parameters and production line configuration parameters; common configuration parameters refer to the configuration requirements that all orders in this automatic board assembly need to meet, including the lower limit of yield, contract number, receiving unit, lower limit of yield for G-type board assembly, and percentage of evaluation indicators; production line configuration refers to the configuration requirements that the order subset needs to meet in the board assembly of its respective production line, including board assembly method priority and A2-type board assembly width deviation.

[0009] Furthermore, the G-type assembly refers to the order being arranged first in the width direction and then in the length direction; the length of the mother board composed of each column of orders is the maximum length of that column of orders, and the width of the mother board is the sum of the widths of each order; the A2-type assembly refers to the order being arranged only in the length direction from wide to narrow.

[0010] Further step 2) refers to the configuration rules, which indicate the priority of orders configured by the user in the system for participating in board assembly within each order subset, i.e., the priority of a certain crystallizer cross-section specification of a certain production line; the order subset is assembled in two rounds under each production line and crystallizer cross-section specification according to the maintenance priority order; if the specified request parameters are not met in both rounds of board assembly, the remaining orders are assembled in two rounds under the next priority order of production line and crystallizer cross-section specification, and so on.

[0011] Furthermore, in step 2), the first round of board assembly first groups the orders within the order subsets according to the same width to obtain unit order subsets. The unit order subsets are assembled using a mixed integer programming algorithm to ensure that the board assembly results have no additional cutting losses and no additional loss of yield. In the second round of board assembly, the remaining orders within the order subsets are assembled using a greedy algorithm to ensure that the remaining order pieces are processed as much as possible within each order subset and that the yield is as high as possible.

[0012] The beneficial effects of this invention are: increased single-piece weight of assembled panels, increased billet yield, reduced unplanned material input, and optimized bottlenecks in production line warehousing. Statistics show that after the system went live, this invention increased the yield by 1%, increased the single-piece weight of assembled panels by 2.5%, and reduced unplanned material input from approximately 17,000 pieces per month to approximately 2,500 pieces. Based on an annual output of 6 million tons of steel and a cost of 4,000 yuan per ton, this translates to annual cost savings of over 240 million yuan. Attached Figure Description

[0013] Figure 1 This is a production flow chart of the present invention. Detailed Implementation

[0014] The present invention will be further described below with reference to the embodiments.

[0015] Example: An automatic board assembly method for wide and thick plates based on parameterized control includes the following steps: 1) For all orders awaiting production in the system (see Table 1), group the orders according to the basic grouping strategy and the maintained grouping strategy to form each order subset; 2) Within each order subset, the program runs with specified request parameters. Common configuration parameters are set to default values. Production line configuration parameters are shown in Table 2. The weights of average unit weight, remaining order quantity, order tail quantity, and average yield in the board assembly results are shown in Table 3. The grouping strategy is shown in Table 4. Two rounds of board assembly are performed according to the configured rules. The first round of board assembly ensures that the board assembly results of the order have no additional cutting losses and no additional loss of yield. 3) The second round of panel assembly is carried out at the cost of a certain loss in yield, in order to process as many remaining order pieces as possible; 4) The system displays the automatically assembled design results to be published. Users can select the design results to be published as needed, and the system will summarize and display the average yield, order clearance status, average unit weight, and remaining order quantity for this batch of assembled designs. The assembled design results are shown in Table 5.

[0016] Table 1 Orders pending production .

[0017] Table 2 Execution Strategy .

[0018] Table 3 Evaluation Indicators .

[0019] Table 4 Contract Grouping .

[0020] Table 5 Panel Assembly Results .

[0021] This invention uses parameterization to control and guide the automatic assembly of thick plates. The system effectively improves the yield and unit weight of the slab design, effectively reduces the generation of unplanned material input, helps reduce inventory, balance sales orders, and brings significant benefits to enterprises.

Claims

1. An automatic assembly method for wide and thick plates based on parameterized control, characterized in that... Includes the following steps: 1) All orders awaiting production within the system are grouped according to the default grouping strategy and the configured grouping strategy to form various order subsets; 2) Within each order subset, based on the request parameters specified by the system operation, two rounds of board assembly are performed sequentially according to the configured rules. The first round of board assembly ensures that the board assembly result of the order has no additional cutting damage and no loss of additional yield. 3) The second round of panel assembly is carried out at the cost of a certain loss in yield, in order to process as many remaining order pieces as possible; 4) After the two rounds of plate assembly are completed, the system displays the set of slab design results of successful plate assembly. Users can select the subset of slab design results to publish for production scheduling from the set of results. The remaining design results are broken down into orders and re-entered into the production scheduling process.

2. The automatic assembly method for wide and thick plates based on parameterized control according to claim 1, characterized in that: The default grouping strategy mentioned in step 1) refers to grouping orders by internal steel type, order thickness, and order width, with orders having the same internal steel type, thickness, and width forming a subset of orders.

3. The automatic board assembly method for wide and thick plates based on parameterized control according to claim 1, characterized in that: The grouping strategy configured in step 1) refers to the user's ability to configure orders to be further refined into smaller groups based on whether they are from the same customer or the same port of arrival, while still satisfying the default grouping strategy.

4. The automatic board assembly method for wide and thick plates based on parameterized control according to claim 1, characterized in that: The system operation specified request parameters mentioned in step 2) include common configuration parameters and production line configuration parameters. Common configuration parameters refer to the configuration requirements that all orders in this automatic board assembly need to meet, including the lower limit of yield, contract number, receiving unit, lower limit of yield for G-type board assembly, and percentage of evaluation indicators. Production line configuration refers to the configuration requirements that the order subset needs to meet in the board assembly of its respective production line, including board assembly method priority and A2-type board assembly width deviation.

5. The automatic board assembly method for wide and thick plates based on parameterized control according to claim 4, characterized in that: The G-type assembly refers to orders arranged first in the width direction and then in the length direction; the length of the mother board composed of each column of orders is the maximum length of that column of orders, and the width of the mother board is the sum of the widths of all orders; the A2-type assembly refers to orders arranged only in the length direction from wide to narrow.

6. The automatic assembly method for wide and thick plates based on parameterized control according to claim 1, characterized in that: The configuration rules mentioned in step 2) refer to the priority of orders configured by the user in the system for participating in board assembly within each order subset, that is, the priority of a certain crystallizer cross-section specification of a certain production line; the order subset is assembled in two rounds under each production line and crystallizer cross-section specification according to the maintenance priority order; if the specified request parameters are not met in both rounds of board assembly, the remaining orders are assembled in two rounds under the next priority order of production line and crystallizer cross-section specification, and so on.

7. The automatic assembly method for wide and thick plates based on parameterized control according to claim 1, characterized in that: In step 2), the first round of board assembly first groups the order subsets by the same width to obtain unit order subsets. The unit order subsets are assembled using a mixed integer programming algorithm to ensure that the board assembly results have no additional cutting damage and no loss of additional yield. The second round of board assembly uses a greedy algorithm to assemble the remaining orders within each order subset, ensuring that as many remaining orders as possible are processed within each order subset, and that the yield rate is as high as possible.

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