An assembly type plant roller scheduling method

Abstract

The application discloses an assembly type workshop roller scheduling method and belongs to the field of workshop scheduling. In view of the low scheduling efficiency and poor accuracy of the prior art, the application provides an assembly type workshop roller scheduling method, which comprises the following steps: after a current roller detects a work-in-process product, it is judged whether the next section of the roller is full of the work-in-process product; if not, the work-in-process product of the current roller is transported to the next section of the roller; if yes, a second judgment is performed, and different scheduling modes are adopted according to the result of the second judgment. The application adopts a double judgment mode to determine whether the next section of the roller reaches a threshold value, which not only ensures that the work-in-process product passes through the roller in an orderly manner, but also solves the problem that the system cannot be scheduled due to the misstorage of the roller caused by the failure of photoelectric and other detection devices, maximally guarantees the stable operation of the system, and enables the work-in-process product to be more safely and efficiently transported to the destination; and the overall method is simple to operate, high in work efficiency and safety.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of workshop scheduling, more specifically, to an assembly type workshop roller scheduling method. BACKGROUND

[0002] The processing-assembly type workshop includes processing and assembly two processes, after the work-in-process passes through the processing process, it needs to enter the assembly process for assembly according to the work-in-process matching requirement and certain order requirement of the product in the assembly process. The processing process contains multiple parallel devices, each device has multiple work-in-process processing capacity; the assembly process also contains multiple parallel devices, each device also has multiple product assembly capacity. There are more researches and practices on the matching management and planning production of the assembly process in the processing-assembly type workshop, which realizes the fine management of production and improves the equipment utilization rate. In the complex roller structure network, the traditional simple scheduling method has the problems of possible product collision and low efficiency, which cannot meet the needs of actual production.

[0003] Corresponding improvements have been made for the above problems, such as Chinese patent application No. CN202210494163.4, published on July 29, 2022, which discloses a billet scheduling method and a billet scheduling system, including: a single continuous casting billet is performed in a casting workshop, a conveying roller receives the billet of the casting workshop and sends it to a rolling mill workshop; when the number of billets received by the rolling mill workshop reaches the maximum threshold, the conveying roller sends the remaining billets to an automatic slow cooling pit system, the automatic slow cooling pit system receives the billets and performs heat preservation; wherein the automatic slow cooling pit system sends the billets saved therein back to the conveying roller according to a preset instruction, and the conveying roller inputs the billets into the rolling mill workshop. The deficiency of this patent is that the scheduling logic is relatively simple, and misjudgment or wrong judgment is easy to occur.

[0004] For example, Chinese patent application No. CN202111112791.3, published on December 24, 2021, discloses a red billet scheduling method, including: when the red sending speed of the steelmaking direct sending device reaches the set threshold, the red billet is sent by the steelmaking direct sending roller; when there is an indirect fault in the steelmaking direct sending roller, and the red sending speed is less than the set threshold, the time for processing the indirect fault is obtained, and the amount of red billet backlog is calculated; by evaluating the transportation capacity of the flat car and the storage capacity of the heat preservation pit within the processing indirect fault time period, and selecting whether to transport or transfer by the flat car or the flat car together with the heat preservation pit; when the steelmaking production workshop produces billets normally, and the rolling mill production workshop has local faults or does not produce, the excess billets are sent to other rolling mill production workshops through the heat preservation pit. The deficiency of this patent is that although it can better cope with various unexpected situations, the overall efficiency is low. SUMMARY

[0005] 1. Problem to be solved

[0006] In view of the problems of low scheduling efficiency and poor accuracy, the present application provides an assembly type workshop roller scheduling method. The present application determines whether the roller reaches the threshold value by adopting a double judgment mode for the next section of the roller, which not only ensures that the products pass through the roller in an orderly manner, but also solves the problem that the system cannot be scheduled due to the false storage of the roller caused by the failure of photoelectric and other detection devices, maximally guarantees the stable operation of the system, and enables the products to be more safely and efficiently delivered to the destination; and the overall method is simple to operate, high in work efficiency and safety.

[0007] 2. Technical solution

[0008] To solve the above problems, the present application adopts the following technical solution.

[0009] An assembly type workshop roller scheduling method, comprising the following steps:

[0010] S1: After the current roller detects the in-process product, it is determined whether the next section of the roller is full of in-process products;

[0011] S2: If the next section of the roller is not full of in-process products, the in-process products of the current roller are transported to the next section of the roller, and the in-process product position of the current roller is updated to the next section of the roller;

[0012] S3: If the next section of the roller is full of in-process products, the in-process products of the next section of the roller are verified one by one to determine whether they are on the next section of the roller;

[0013] S4: If the in-process products of the next section of the roller are verified one by one and full, the in-process products of the current roller continue to wait;

[0014] S5: If the in-process products of the next section of the roller are verified one by one and not full, the in-process products of the current roller are transported to the next section of the roller, and the in-process product position of the current roller is updated to the next section of the roller.

[0015] Further, in the step S1, an RFID sensing device is used to detect the in-process product, and the RFID sensing device is arranged at the end of the current roller close to the next section of the roller and located at the middle position of the end.

[0016] Further, the current roller is further provided with an identification sensor, a position sensor and a speed sensor, the identification sensor is used to identify the product information of the in-process product, the position sensor is used to detect the position of the in-process product on the current roller, and the speed sensor is used to detect the speed of the in-process product; the above-mentioned sensors are electrically connected with the driving device for controlling the roller.

[0017] Further, the current roller is provided with an alarm device, and the alarm device is electrically connected with the identification sensor, the position sensor and the speed sensor.

[0018] Further, the step S3 of verifying the work-in-process of the next roller includes: verifying whether the work-in-process of the next roller has position update and / or verifying whether the work-in-process of the next roller has completed the delivery task; after the verification result, if there is a misjudgment, the misjudged work-in-process information is removed from the roller.

[0019] Further, when the work-in-process of the next roller is not full, the current roller updates the position of the work-in-process to the end of the next roller.

[0020] Further, the next roller is provided with an indicator, and when the work-in-process of the next roller is full, the indicator is in a bright state, and when the work-in-process of the next roller is not full, the indicator is in a non-bright state.

[0021] 3, beneficial effects

[0022] Compared with the prior art, the beneficial effects of the present application are:

[0023] (1) The present application judges whether the work-in-process of the next roller to be delivered is full, to avoid production accidents caused by the number of products stored on the roller exceeding the threshold value; at the same time, the double judgment method is used to determine whether the next roller reaches the threshold value, which not only ensures the orderly passing of the products through the roller, but also solves the problem of system scheduling caused by the full storage of the roller due to the failure of photoelectric and other detection equipment, maximizes the stable operation of the system, and makes the products more safely and efficiently delivered to the destination to meet the needs of factory production; the whole method is simple to operate and stable to run;

[0024] (2) The present application uses RFID sensing equipment to sense the work-in-process, which can realize real-time data updating, and has high security and efficiency, and the RFID sensing equipment is arranged at the middle position of the end of the current roller close to the next roller, which can conveniently and accurately sense the work-in-process and avoid missing detection; at the same time, the roller is also provided with a plurality of sensors corresponding to different detection functions, which can monitor the work-in-process in all aspects, and is electrically connected with the alarm device and the driving device, so as to timely know the occurrence of unexpected situations and remedy, increase the safety and timeliness of the whole process;

[0025] (3) The present invention verifies the roller conveyor that is full of work-in-process from two aspects: first, whether the position of the work-in-process has been updated, and second, whether the work-in-process has completed the conveying task; it takes into account all aspects and avoids misjudgment to the greatest extent. If a misjudgment occurs, the misjudged work-in-process information is removed to facilitate normal subsequent scheduling; and an indicator light is set on the next section of the roller conveyor. The indicator light displays different states according to different situations, which facilitates quick judgment, improves judgment efficiency, and saves time and labor costs. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the workshop roller conveyor distribution according to the present invention;

[0027] Figure 2 This is a schematic diagram of the unfilled scheduling distribution of the workshop roller conveyor according to the present invention;

[0028] Figure 3 This is a schematic diagram of the full scheduling distribution of the workshop roller conveyor according to the present invention;

[0029] Figure 4 This is a schematic diagram of the overall process of the present invention. Detailed Implementation

[0030] The present invention will now be further described with reference to specific embodiments and accompanying drawings.

[0031] Example 1

[0032] like Figure 4 As shown, a roller conveyor scheduling method for an assembly workshop includes the following steps:

[0033] S1: After the current roller conveyor detects work-in-process, it determines whether the next section of the roller conveyor is full of work-in-process. Specifically, in this embodiment, an RFID sensing device is used to detect work-in-process. The RFID sensing device is located at the end of the current roller conveyor near the next section of the roller conveyor, and in the middle of the end. Each work-in-process has its own unique tag, which stores the attributes of the work-in-process. The principle of RFID is non-contact data communication between the reader and the tag to achieve the purpose of target identification. It can realize real-time data updates, and has high work efficiency and security. Target identification is also faster and more accurate. At the same time, the RFID sensing device is located at the middle of the end of the current roller conveyor near the next section of the roller conveyor, which can conveniently and accurately sense work-in-process and avoid missed detections.

[0034] Further, the current roller way is also provided with an identification sensor, a position sensor and a speed sensor in step S1, the identification sensor is used to identify the product information of the in-process product, the position sensor is used to detect the position of the in-process product on the current roller way, and the speed sensor is used to detect the speed of the in-process product; the above-mentioned sensors are electrically connected with the driving device for controlling the roller way; the sensors with different detection functions arranged on the current roller way can comprehensively detect the in-process product, and when the in-process product is detected to have an abnormal situation, the driving device can be used to control the start and stop of the roller way, so as to facilitate the subsequent maintenance or replacement operation; the arrangement of the sensors can better monitor the whole process, and further ensure that the in-process product can be safely and smoothly conveyed; meanwhile, the current roller way is also provided with an alarm device, the alarm device is electrically connected with the identification sensor, the position sensor and the speed sensor respectively, and the arrangement of the alarm device further improves the timeliness of the whole process; when the sensors detect an abnormal or unexpected situation, the alarm device can timely remind the staff, timely know the occurrence of the unexpected situation, timely remedy, and increase the safety and timeliness of the whole process.

[0035] S2: If the next section of the roller way is not full of in-process products, the in-process products on the current roller way are conveyed to the next section of the roller way, and the position of the in-process products on the current roller way is updated to the next section of the roller way; specifically, the position of the in-process products on the current roller way is updated to the end of the next section of the roller way, so as to realize accurate positioning and facilitate timely updating of the information of the next section of the roller way.

[0036] S3: If the next section of the roller way is full of in-process products, the in-process products on the next section of the roller way are verified one by one; the verification of the in-process products on the next section of the roller way in this step includes: verifying whether the in-process products on the next section of the roller way have position updates and / or verifying whether the in-process products on the next section of the roller way have completed the conveying task; the position is judged to avoid the situation that a certain in-process product has been conveyed to the next roller way, but no information of the in-process product leaving is detected, resulting in a misjudgment; after the verification result, if there is a misjudgment, the in-process product information of the misjudgment is removed from the roller way; considering comprehensively, the misjudgment is avoided to the greatest extent, and after the misjudgment, the in-process product information of the misjudgment is removed, so as to facilitate the subsequent scheduling.

[0037] S4: If the in-process products on the next section of the roller way are full after being verified one by one, the in-process products on the current roller way continue to wait.

[0038] S5: If the in-process products on the next section of the roller way are not full after being verified one by one, the in-process products on the current roller way are conveyed to the next section of the roller way, and the position of the in-process products on the current roller way is updated to the next section of the roller way; specifically, the position of the in-process products on the current roller way is updated to the end of the next section of the roller way.

[0039] In the process of automatically distributing the work-in-process from the machining process to the assembly process in the machining-assembly workshop, the work-in-process stored in each roller table has a certain threshold value due to the limitation of mechanical size, and when the threshold value is exceeded, there will be certain unsafe factors, and even production accidents will occur; the present application avoids the production accidents caused by the work-in-process stored in one roller table exceeding the threshold value of the roller table by judging whether the next roller table to which the work-in-process is about to be transported is full of work-in-process, and simultaneously determines whether the next roller table reaches the threshold value by using a double judgment mode, which not only ensures that the work-in-process passes through the roller table in an orderly manner, but also solves the problem that the system cannot be dispatched due to the fault of other detection equipment such as photoelectricity, and maximally guarantees the stable operation of the system, so that the work-in-process is more safely and efficiently transported to the destination, so as to meet the needs of factory production; the whole method is simple to operate and stable in operation.

[0040] Example 2

[0041] In order to further improve the efficiency of the whole work in this embodiment, an indicator light is arranged on the next roller table, and when the work-in-process of the next roller table is full, the indicator light is in a bright state, and when the work-in-process of the next roller table is not full, the indicator light is in a non-bright state. The indicator light presents different states according to different situations, so that it is convenient to quickly judge whether the next roller table is easy to reach the threshold value (i.e. whether the work-in-process is full), improve the work efficiency of judgment, and save time and labor cost.

[0042] Example 3

[0043] In order to further facilitate the understanding of the present application, specific examples will be given in this embodiment as follows: Figure 1 A typical machining-assembly workshop is given, wherein SL-1, SL-2 and SL-3 are three parallel machining devices, each of which has a plurality of machining capabilities of work-in-process; JG-1, JG-2 and JG-3 are three parallel assembly devices, each of which has a plurality of assembly capabilities of products. Figure 1 The rectangular blocks numbered 1-19 in the figure represent 19 roller tables, each of which has an independently controllable power motor and has a bidirectional conveying capability, and each roller table can convey only one work-in-process. The information of the work-in-process involved in the production of each product in the assembly process, the complete set constraint and the sequence constraint can be managed. Two work orders are constructed as follows:

[0044] (WorkID-1, Roller-16, JG-2, Product-1);

[0045] (WorkID-2, Roller-16, JG-2, Product-2);

[0046] Take the work order WorkID-2 as an example, the first attribute value WorkID-2 represents the work order ID, the second attribute value represents that the work order needs to send the WIP to the Roller-16, the third attribute value represents that the work order is assembled on the equipment JG-2, the fourth attribute value represents that the product name of the work order after assembly is Product-2, and the roller path through which the work order is sent in sequence is 2, 7, 14, 15, and 16 rollers. Next, 7 distribution orders are constructed for the above 2 work orders:

[0047] (SendID-1, WIP-1, WorkID-1, Roller-16, SL-2, Roller-15);

[0048] (SendID-2, WIP-1, WorkID-1, Roller-16, SL-2, Roller-15);

[0049] (SendID-3, WIP-1, WorkID-1, Roller-16, SL-2, Roller-15);

[0050] (SendID-4, WIP-1, WorkID-1, Roller-16, SL-2, Roller-15);

[0051] (SendID-5, WIP-1, WorkID-1, Roller-16, SL-2, Roller-15);

[0052] (SendID-6, WIP-1, WorkID-1, Roller-16, SL-2, Roller-15);

[0053] (SendID-7, WIP-2, WorkID-2, Roller-16, SL-2, Roller-14);

[0054] Next, take the second distribution order as an example, the first attribute value SendID-2 is the distribution order ID, the second attribute value WIP-1 is the WIP name, the third attribute value WorkID-1 represents the work order number to which the distribution order SendID-2 belongs, the fourth attribute value Roller-16 represents the destination roller of the WIP, the fifth attribute value SL-2 is the processing equipment of the WIP, and the sixth attribute value Roller-15 represents that the WIP is currently located at the 15# roller. Figure 3 、 Figure 4In the figure, the above-mentioned seven delivery orders are denoted as ABCDEFG, the delivery order SendID-1 corresponds to A, the delivery order SendID-7 corresponds to G, and the figure is marked and placed on the current roller.

[0055] When the six products of the WorkID-1 work order are all transported to the 14# and 15# rollers as shown in the figure, F passes through the RFID sensing device, at this time, the in-process product is updated to the 14# roller. When F sends a scheduling request, it is determined whether the next section 15# pipeline is full, if the roller is not full, the scheduling is performed to the 15# roller. When F leaves the current 14# roller, the detection device detects the leaving roller signal, at this time, F is cleared from the 14# roller and updated to the end of the 15# roller. Figure 3

[0056] The one product of the WorkID-2 work order is transported to the 14# roller as shown in the figure, passes through the RFID sensing and requests scheduling, G is first updated to the 14# roller, and then it is determined whether the next section 15# roller is full. If the 15# roller is full at this time, it is necessary to determine whether all the delivery orders A, B, C, D, E and F of the in-process product of the full 15# roller are valid delivery orders (according to whether the position of the delivery order has been updated to other rollers or whether the delivery task has been completed), if all are valid, G needs to continue to wait for the next scheduling. Figure 4

[0057] If A of the six delivery orders of the 15# roller continues to stay in the 15# roller due to the fact that the detection device does not detect the leaving signal of A when A leaves the 15# roller, when G requests, the 15# roller is false full, according to the foregoing strategy, A is removed from the 15# roller, and then G continues to be scheduled to the next section roller.

[0058] The assembly type roller scheduling method of the application not only ensures that the products pass through the roller in an orderly manner, but also solves the problem that the system cannot be scheduled due to the false full storage of the roller caused by the failure of the photoelectric and other detection devices, and maximally guarantees the stable operation of the system.

[0059] The examples of the application only describe the preferred embodiments of the application, and do not limit the concept and scope of the application. Without departing from the design idea of the application, various modifications and improvements of the technical solutions of the application made by the engineering and technical personnel in the field shall fall within the protection scope of the application.​​

Claims

1. A make-to-order plant roller scheduling method, characterized by: The method comprises the following steps: S1: After the current roller detects the in-process products, it is determined whether the next roller of the current roller is full of in-process products; S2: If the next roller is not full of in-process products, the in-process products of the current roller are transported to the next roller, and the position of the in-process products of the current roller is updated to the next roller; S3: If the next roller is full of in-process products, the in-process products of the next roller are checked one by one to determine whether they are on the next roller; the checking of the in-process products of the next roller in step S3 comprises checking whether the in-process products of the next roller have position updates and / or checking whether the in-process products of the next roller have completed the transportation task; If there is a false judgment after the checking, the in-process product information of the false judgment is removed from the roller; S4: If the in-process products of the next roller are full after the one-by-one checking, the in-process products of the current roller continue to wait; S5: If the in-process products of the next roller are not full after the one-by-one checking, the in-process products of the current roller are transported to the next roller, and the position of the in-process products of the current roller is updated to the next roller.

2. The method of claim 1, wherein: In step S1, the RFID sensing device is used to detect the in-process products, and the RFID sensing device is arranged at the end of the current roller close to the next roller and at the middle position of the end.

3. The method of claim 2, wherein: The current roller is further provided with an identification sensor, a position sensor and a speed sensor, the identification sensor is used to identify the product information of the in-process products, the position sensor is used to detect the position of the in-process products on the current roller, and the speed sensor is used to detect the speed of the in-process products; The above sensors are electrically connected with the driving device of the roller.

4. The method of claim 3, wherein: The current roller is further provided with an alarm device, and the alarm device is electrically connected with the identification sensor, the position sensor and the speed sensor.

5. The method of claim 1, wherein: When the in-process products of the next roller are not full, the in-process product position of the current roller is updated to the end of the next roller.

6. The method of claim 1, wherein: An indicating lamp is arranged on the next roller, and when the in-process products of the next roller are full, the indicating lamp is in a bright state, and when the in-process products of the next roller are not full, the indicating lamp is in a non-bright state.

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