A stainless steel plate continuous production line scheduling method and system
By optimizing the production schedule of the stainless steel continuous production line through steps such as order classification, sub-plate assembly, mother plate assembly, and billet selection, the problems of long production cycle and high energy consumption in traditional methods are solved, achieving the effect of efficient utilization of production line capacity and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- WISDRI ENG & RES INC LTD
- Filing Date
- 2026-04-09
- Publication Date
- 2026-07-31
AI Technical Summary
Existing production scheduling methods for continuous stainless steel production lines cannot efficiently utilize production line capacity, resulting in long production cycles and high energy consumption.
Through steps such as order classification, sub-plate assembly, mother plate assembly, billet selection, and production scheduling, the required billet size for different steel grades and specifications of finished plates in customer orders is gradually calculated. Based on the product delivery cycle and rolling sequence, the billet production sequence is optimized, and the final production schedule is formulated.
It improved the efficiency of the production line, increased production capacity and yield, and reduced production costs.
Smart Images
Figure CN122491716A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of production line scheduling technology, specifically relating to a production scheduling method and system for a continuous production line of stainless steel plates. Background Technology
[0002] Stainless steel sheets are widely used in construction, shipbuilding, energy, chemical, and medical fields due to their excellent corrosion resistance, stable mechanical properties, and superior hot working performance. To ensure the good corrosion resistance of austenitic stainless steel, the rolled steel sheets require heat treatment processes such as solution treatment and quenching. Existing continuous stainless steel production lines and production schemes optimize the problems of long production cycles and high energy consumption in traditional stainless steel production lines. They connect the heating zone, rolling zone, heat treatment zone, finishing zone, and pickling zone sequentially along the sheet's running direction to form a continuous production line. Unlike traditional stainless steel production lines, this line features a continuous production process, from continuously cast billets to rolled mother plates, then to sheared and segmented daughter plates, and finally to finished plates cut to length. This makes traditional production line scheduling methods unsuitable for this line; therefore, a scheduling method suitable for continuous production lines is urgently needed to efficiently utilize its production capacity. Summary of the Invention
[0003] The technical problem to be solved by the present invention is to provide a production scheduling method and system for a continuous stainless steel sheet production line, which can improve the efficiency of the production line.
[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a production scheduling method for a continuous production line of stainless steel plates, comprising the following steps: S1: Classify finished board orders according to customer needs, and sort the finished boards from longest to shortest length to form sub-order groups; S2: Accumulate finished boards in order of length in a sub-order; based on the sub-board length judgment condition, combine the finished boards in any sub-order into multiple sub-boards to form a sub-board group; S3: In a certain sub-board group, sub-boards will be accumulated in order of length. Based on the motherboard length judgment condition, the sub-boards in any sub-order sub-board group will be combined into multiple motherboards to form a motherboard group. S4: Based on rolling process requirements and rolling deformation theory, the required billet specifications for all mother plates in the rolling mother plate group are calculated according to the specifications of the mother plates in the mother plate group to form a billet group; S5: Develop a production schedule, taking into account delivery time, product quality, production cost, the impact of billet specification changes on rolling stability and roll wear, arrange the production sequence of billets, and obtain the final production schedule.
[0005] According to the above scheme, in step S1, the dimensions of classifying finished plate orders include steel type, width, and thickness.
[0006] According to the above scheme, the sub-board length determination condition in step S2 includes: The maximum length of the sub-board shall not exceed the maximum length of the sub-board that can be transported to the subsequent production line after taking into account the shearing error; The minimum length of the sub-board shall not be less than the minimum length of the sub-board set when taking into account the production rhythm and product plan.
[0007] Furthermore, in step S2, when the length of the subboard does not meet the subboard length judgment condition, the last accumulated finished product in the order is sequentially swapped with the next finished product and the length is accumulated until the subboard judgment condition is met.
[0008] Furthermore, in step S2, when the subboard length is accumulated to the i-th finished product, the subboard length does not meet the subboard length judgment condition, and when the i-th finished product is removed, the subboard length also does not meet the subboard length judgment condition. In this case, the i-th finished product is sequentially swapped with the (i+1), (i+2)... finished products and accumulated until the subboard length judgment condition is met.
[0009] According to the above scheme, the conditions for determining the length of the mother plate in step S3 include: Does the length of the mother plate meet the requirements of the heating furnace for the length of the cast billet? The length of the front and rear rollers of the rolling mill limits the maximum length of the rolled mother plate. The shape and straightness of different steel grades limit the maximum length of the rolled mother plate.
[0010] Furthermore, in step S3, when the length of the motherboard does not meet the motherboard length judgment condition, the last sub-board in the sub-order is sequentially swapped with the next sub-board and the length is accumulated until the motherboard judgment condition is met.
[0011] Furthermore, in step S3, when the length of the motherboard is accumulated to the i-th subboard, the length of the motherboard does not meet the motherboard length judgment condition, and when the i-th subboard is removed, the length of the motherboard also does not meet the motherboard length judgment condition. In this case, the i-th subboard is sequentially swapped with the (i+1), (i+2)... subboards and accumulated until the motherboard judgment condition is met.
[0012] A production scheduling system for a continuous production line of stainless steel sheets. The order classification submodule is used to classify finished product board orders according to customer needs and sort the finished product boards from longest to shortest length to form sub-order groups; The sub-board assembly sub-module is used to accumulate finished boards in a sub-order in order of length; based on the sub-board length judgment condition, the finished boards in any sub-order are combined into multiple sub-boards to form a sub-board group; The motherboard assembly submodule is used to accumulate subboards in a certain subboard group in order of length, and combine the subboards in any suborder subboard group into multiple motherboards based on the motherboard length judgment condition to form a motherboard group; The billet selection submodule is used to calculate the required billet specifications for all mother plates in the rolling mother plate group based on the rolling process requirements and rolling deformation theory, and to form a billet group. The production scheduling submodule is used to formulate a production schedule. It comprehensively considers delivery time, product quality, production cost, the impact of billet specification changes on rolling stability and roll wear, arranges the production sequence of billets, and obtains the final production schedule.
[0013] A computer memory storing a computer program executable by a computer processor, the computer program executing a production scheduling method for a continuous production line of stainless steel sheets.
[0014] The beneficial effects of this invention are as follows: 1. The present invention discloses a production scheduling method and system for a continuous stainless steel plate production line. Through five processing steps, namely order classification, sub-plate assembly, mother plate assembly, billet selection, and production scheduling plan formulation, the required billet size is calculated step by step from the finished plates of different steel grades and specifications in the customer order. Then, based on the product delivery cycle and considering the impact of rolling sequence on product quality and refractory material loss, the production sequence of the billets is arranged to obtain the final production scheduling plan, thereby improving the efficiency of the production line.
[0015] 2. This invention is applicable to a new type of stainless steel continuous production line, which can efficiently utilize the production rhythm of the production line, improve production capacity, and help increase the yield rate and reduce production costs.
[0016] 3. This invention efficiently utilizes the production rhythm of stainless steel continuous production lines, enhances production capacity, and helps improve the yield rate and reduce production costs.
[0017] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a flowchart illustrating an embodiment of the present invention.
[0020] Figure 2 This is a flowchart of an embodiment of the present invention.
[0021] Figure 3 This is a flowchart of order classification according to an embodiment of the present invention.
[0022] Figure 4 This is a flowchart of the sub-board assembly according to an embodiment of the present invention.
[0023] Figure 5 This is a flowchart of the motherboard assembly according to an embodiment of the present invention. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.
[0025] Example 1 See Figure 1 The specific steps of a production scheduling method for a continuous stainless steel sheet production line are as follows: S1: Order Classification: Orders are classified according to customer requirements for finished plates based on multiple dimensions including steel type, width, and thickness, and then sorted by finished plate length from largest to smallest to form sub-order groups; S2: Sub-board combination: For a certain order among the above sub-orders, the finished lengths of the finished boards are added up in sequence. Based on the defined sub-board length judgment conditions, the finished boards in any sub-order are combined into multiple sub-board lengths to form a sub-board group. The criteria for determining the length of the sub-board include that, after considering the shearing error of the shearing device, the maximum length of the sub-board does not exceed the maximum length of the sub-board that can be transported by the subsequent production line, and the minimum length of the sub-board is not less than the minimum sub-board value set when comprehensively considering the production rhythm and product plan.
[0026] When the length of a subboard does not meet the subboard length judgment condition, the method is to swap the order of the last accumulated finished product with the subsequent finished products in the order and accumulate the length until the subboard judgment condition is met; that is, when the subboard length is accumulated to the i-th finished product, the subboard length does not meet the subboard length judgment condition, and when the i-th finished product is removed, the length also does not meet the subboard length judgment condition. The i-th finished product is swapped with the (i+1), i+2... finished products in order and accumulated until the subboard judgment condition is met. S3: Motherboard combination refers to combining the subboards in a sub-order subboard group by sequentially adding the finished lengths of the subboards and combining them into multiple motherboard lengths according to the defined motherboard length judgment conditions, thus forming a motherboard group. The criteria for judging the length of the mother plate include, but are not limited to, whether the requirements of the heating furnace for the length of the billet are met, the limitation of the length of the front and rear rollers of the rolling mill on the maximum length of the mother plate after rolling, and the limitation of the maximum length of the mother plate after rolling on the plate shape and straightness of different steel grades. When the length of the motherboard does not meet the motherboard length judgment condition, the method is to swap the order of the last sub-board with the next sub-board in the sub-order and accumulate the length until the motherboard judgment condition is met; that is, when the motherboard length is accumulated to the i-th sub-board, the motherboard length does not meet the motherboard length judgment condition, and when the i-th sub-board is removed, the length also does not meet the motherboard length judgment condition. Preferably, the i-th sub-board is swapped with the (i+1), i+2... sub-boards in turn and accumulated until the motherboard judgment condition is met. S4: Billet selection refers to the calculation of the required billet specifications for all mother plates in the rolling mother plate group based on the rolling process requirements and rolling deformation theory, and to form a billet group. S5: Formulating a production schedule refers to arranging the production sequence of billets by comprehensively considering factors such as delivery time, product quality, and production costs, while also taking into account the impact of billet specification changes on rolling stability and roll wear, in order to obtain the final production schedule.
[0027] This embodiment uses five processing steps—order classification, sub-plate assembly, mother plate assembly, billet selection, and production scheduling—to progressively calculate the required billet dimensions from finished plates of different steel grades and specifications in customer orders. Then, based on the product delivery cycle and considering the impact of rolling sequence on product quality and refractory material loss, the production sequence of the billets is arranged to obtain the final production schedule, thereby improving the efficiency of the production line.
[0028] Example 2 The steps in this embodiment are the same as in Embodiment 1, the difference being that each step is applied to a specific instance. The production scheduling method for a continuous stainless steel sheet production line is as follows: Figure 2 As shown, it includes five steps: order classification 100, sub-plate assembly 200, mother plate assembly 300, billet selection 400, and production scheduling plan formulation 500. The processing method for order category 100 is as follows: Figure 3 As shown, the finished products in the order are first classified by steel type 101, then by thickness 102, then by width 103, and finally sorted by length from largest to smallest 104 to form sub-order groups 110. The processing method for sub-board assembly 200 is as follows: Figure 4As shown, step 201: Assume the x-th sub-order is selected as Dx, and the length of the i-th finished board in sub-order Dx is Li; Step 202: Set initial values, first select the first finished board, the initial length of which is 0, i.e., i=1, L=0; Step 203: Add up the lengths of the finished boards in the sub-order group in sequence; Step 204: Determine whether the added sub-board length meets the requirements according to the preset conditions. If it meets the requirements, proceed to step 207 to output the sub-board length; otherwise, proceed to step 205; Step 205: Subtract the length of the last finished board; Step 206: Set the next finished board as the i-th board; Repeat steps 203 and 204 until the conditions are met; Step 207: Output the first sub-board that meets the conditions; Step 208: Repeat the above process until all finished boards in sub-order Dx are combined into sub-boards; Step 210: Process all sub-orders to obtain the sub-board group; The processing method for motherboard assembly 300 is as follows: Figure 5 As shown, step 301: Assume the y-th sub-board group is selected as Zy, and the length of the j-th sub-board in sub-board group Zy is Lj; Step 302: Set initial values, first select the first sub-board, the initial length of which is 0, i.e., i=1, L=0; Step 303: Add the lengths of the sub-boards in the sub-board group in sequence; Step 304: Determine whether the length of the accumulated motherboard meets the requirements according to the preset conditions. If it meets the requirements, proceed to step 307 to output the length of the motherboard; otherwise, proceed to step 305; Step 305: Subtract the length of the last sub-board; Step 306: Set the next sub-board as the i-th board; Repeat steps 303 and 304 until the conditions are met; Step 307: Output the first motherboard that meets the conditions; Step 308: Repeat the above process until all sub-boards in sub-order Zy are combined into a motherboard; Step 310: Process all sub-board groups to obtain the motherboard group. The selection of billet type 400 is based on the rolling process requirements and rolling deformation theory. Due to the principle of constant volume during the rolling process, the billet size required for all mother plates is calculated based on the specifications of the mother plate after rolling, thereby obtaining all the billet sizes required for the rolling mother plate group and forming the billet group. The production scheduling plan is formulated by comprehensively considering factors such as delivery cycle, the impact of billet rolling sequence on product quality, the impact of billet specification changes on rolling stability, and roll wear, and arranging the production sequence of billets to obtain the final production schedule.
[0029] This embodiment is applicable to a new type of stainless steel continuous production line, which can efficiently utilize the production rhythm of the production line, improve production capacity, and help increase the yield rate and reduce production costs.
[0030] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.
[0031] Example 3 This embodiment is used to implement the principle of the above method embodiment to construct a production scheduling system for a continuous production line of stainless steel plates, including an order classification submodule, a sub-plate combination submodule, a mother plate combination submodule, a billet selection submodule, and a production scheduling plan formulation submodule.
[0032] The order classification submodule is used to classify finished product board orders according to customer needs and sort the finished product boards from longest to shortest length to form sub-order groups; The sub-board assembly sub-module is used to accumulate finished boards in a sub-order in order of length; based on the sub-board length judgment condition, the finished boards in any sub-order are combined into multiple sub-boards to form a sub-board group; The motherboard assembly submodule is used to accumulate subboards in a certain subboard group in order of length, and combine the subboards in any suborder subboard group into multiple motherboards based on the motherboard length judgment condition to form a motherboard group; The billet selection submodule is used to calculate the required billet specifications for all mother plates in the rolling mother plate group based on the rolling process requirements and rolling deformation theory, and to form a billet group. The production scheduling submodule is used to formulate a production schedule. It comprehensively considers delivery time, product quality, production cost, the impact of billet specification changes on rolling stability and roll wear, arranges the production sequence of billets, and obtains the final production schedule.
[0033] Each submodule is mainly used to implement the various steps of the method embodiment, which will not be elaborated here.
[0034] It should be noted that, depending on the implementation needs, the various steps / components described in this application can be broken down into more steps / components, or two or more steps / components or parts of the operation of steps / components can be combined into new steps / components to achieve the purpose of this invention.
[0035] This embodiment also includes a processor, a communication interface, a memory, and a communication bus; wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; the memory stores a computer program, and when the program is executed by the processor, the processor performs the steps of a continuous production line scheduling method for stainless steel plates.
[0036] This embodiment also provides a computer-readable storage medium storing executable instructions that, when executed by a processor, enable the processor to implement a production scheduling method for a continuous production line of stainless steel sheets.
[0037] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects.
[0038] Furthermore, this application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.
[0039] This application is described with reference to the flowchart of the method and computer program product according to Embodiment 1 and the block diagram of the device (system) according to Embodiment 3. It should be understood that each step or block in the flowchart or block diagram, as well as combinations of steps or blocks in the flowchart or block diagram, can be implemented by computer program instructions.
[0040] These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing device to produce a machine, such that the instructions, which are executable by the processor of the computer or other programmable data processing device, produce instructions for implementing the process. Figure 1 One or more processes or boxes Figure 1 A production scheduling system for a continuous production line of stainless steel sheet, specifying functions within one or more boxes.
[0041] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes or boxes Figure 1 The function specified in one or more boxes.
[0042] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes or boxes Figure 1 The steps of a continuous production line scheduling method for stainless steel sheet are specified in one or more boxes.
[0043] The above embodiments are only used to illustrate the design concept and features of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. The protection scope of the present invention is not limited to the above embodiments. Therefore, all equivalent changes or modifications made based on the principles and design ideas disclosed in the present invention are within the protection scope of the present invention.
Claims
1. A method for scheduling a stainless steel sheet continuous production line, characterized by: Includes the following steps: S1: Classify finished board orders according to customer needs, and sort the finished boards from longest to shortest length to form sub-order groups; S2: Accumulate finished boards in order of length in a sub-order; based on the sub-board length judgment condition, combine the finished boards in any sub-order into multiple sub-boards to form a sub-board group; S3: In a certain sub-board group, sub-boards will be accumulated in order of length. Based on the motherboard length judgment condition, the sub-boards in any sub-order sub-board group will be combined into multiple motherboards to form a motherboard group. S4: Based on rolling process requirements and rolling deformation theory, the required billet specifications for all mother plates in the rolling mother plate group are calculated according to the specifications of the mother plates in the mother plate group to form a billet group; S5: Develop a production schedule, taking into account delivery time, product quality, production cost, the impact of billet specification changes on rolling stability and roll wear, arrange the production sequence of billets, and obtain the final production schedule.
2. The production scheduling method for a stainless steel sheet continuous production line according to claim 1, characterized by: In step S1, the dimensions for classifying finished plate orders include steel type, width, and thickness.
3. The production scheduling method for a continuous stainless steel plate production line according to claim 1, characterized in that: In step S2, the conditions for determining the length of the sub-board include: The maximum length of the sub-board shall not exceed the maximum length of the sub-board that can be transported to the subsequent production line after taking into account the shearing error; The minimum length of the sub-board shall not be less than the minimum length of the sub-board set when taking into account the production rhythm and product plan.
4. The production scheduling method for a continuous stainless steel plate production line according to claim 3, characterized in that: In step S2, when the length of the subboard does not meet the subboard length judgment condition, the last finished product accumulated in the order is swapped with the next finished product in sequence and the length is accumulated until the subboard judgment condition is met.
5. The production scheduling method for a continuous stainless steel sheet production line according to claim 3, characterized in that: In step S2, when the subboard length is accumulated to the i-th finished product, the subboard length does not meet the subboard length judgment condition. When the i-th finished product is removed, the subboard length also does not meet the subboard length judgment condition. In this case, the i-th finished product is sequentially swapped with the (i+1), (i+2)... finished products and accumulated until the subboard length judgment condition is met.
6. The production scheduling method for a continuous stainless steel plate production line according to claim 1, characterized in that: In step S3, the criteria for determining the length of the mother plate include: Does the length of the mother plate meet the requirements of the heating furnace for the length of the cast billet? The length of the front and rear rollers of the rolling mill limits the maximum length of the rolled mother plate. The shape and straightness of different steel grades limit the maximum length of the rolled mother plate.
7. The production scheduling method for a continuous stainless steel plate production line according to claim 6, characterized in that: In step S3, when the length of the motherboard does not meet the motherboard length judgment condition, the last sub-board in the sub-order is swapped with the next sub-board in turn and the length is accumulated until the motherboard judgment condition is met.
8. The production scheduling method for a continuous stainless steel plate production line according to claim 6, characterized in that: In step S3, when the length of the motherboard is accumulated to the i-th subboard, the length of the motherboard does not meet the motherboard length judgment condition, and when the i-th subboard is removed, the length of the motherboard also does not meet the motherboard length judgment condition. In this case, the i-th subboard is sequentially swapped with the (i+1), (i+2)... subboards and accumulated until the motherboard judgment condition is met.
9. A production scheduling system for a continuous stainless steel sheet production line, characterized in that: The order classification submodule is used to classify finished product board orders according to customer needs and sort the finished product boards from longest to shortest length to form sub-order groups; The sub-board assembly sub-module is used to accumulate finished boards in a sub-order in order of length; based on the sub-board length judgment condition, the finished boards in any sub-order are combined into multiple sub-boards to form a sub-board group; The motherboard assembly submodule is used to accumulate subboards in a certain subboard group in order of length, and combine the subboards in any suborder subboard group into multiple motherboards based on the motherboard length judgment condition to form a motherboard group; The billet selection submodule is used to calculate the required billet specifications for all mother plates in the rolling mother plate group based on the rolling process requirements and rolling deformation theory, and to form a billet group. The production scheduling submodule is used to formulate a production schedule. It comprehensively considers delivery time, product quality, production cost, the impact of billet specification changes on rolling stability and roll wear, arranges the production sequence of billets, and obtains the final production schedule.
10. A computer memory, characterized in that: It contains a computer program that can be executed by a computer processor, which executes a production scheduling method for a continuous stainless steel sheet production line as described in any one of claims 1 to 8.