CN113919709A - Pulling mode-based balanced production scheduling method and system - Google Patents
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Abstract
The invention discloses a balanced production scheduling method based on a pulling mode, which comprises the following steps: the goods picking end sends a goods picking requirement, and the production system releases the task flow billboard; distributing the production information of the signboards to all the signboards according to the actual task state; the mobile billboard carries production information and enters a processing unit in the production flow; the downstream processing unit judges whether to carry out production according to the quantity of the raw materials extracted from the upstream processing unit; and finishing the billboard process after all production tasks are finished, and finishing the production. The invention also provides a system for realizing the balanced production scheduling method, which comprises one or more processing units, and a flow billboard, a billboard announcement and a production task distribution and pulling control unit which are communicated among the processing units. Compared with the prior art, the method has the advantages of greatly shortening the production period, reducing the raw material consumption in the production process, saving the capital investment, improving the economic benefit and the like.
Description
Technical Field
The invention belongs to the technical field of production management methods, and relates to a balanced production scheduling method and system based on a pulling mode.
Background
In the production of the automobile industry, the production mode of assembling small parts is a ubiquitous production mode. Because the types of products in the production process of small parts are more, for a machining unit in the production process, if the machining unit needs to be subjected to model changing adjustment when different types of parts are produced, waste of certain production time is caused, unit production time on each process of a production line is different according to the influence of the production types and equipment, and the characteristics bring new challenges to the management of the batch production of the small parts of the automobiles.
Generally, the production and processing of small automobile parts are realized in a mode of pushing production. The main characteristics of the push type production are that the number of matched parts is too large, which not only causes the occupation of a large amount of raw materials, capital and inventory, but also causes the waste of a lot of human resources. And the processing period of parts is long, which affects the delivery period of products. Because the processing unit can not be reused for processing different types of parts, the waiting waste of the working procedures is serious during the model changing, and the production cost is increased. Therefore, a manager needs to invest a lot of manpower to manage the production order and control the production progress.
Disclosure of Invention
In order to solve the defects in the prior art, the invention aims to provide a balanced production scheduling method based on a pulling mode and a system for realizing the production scheduling method under a specific scene, and the balanced production scheduling method can be used for the production and manufacturing of parts in the automobile industry.
The purpose of the invention can be realized by the following technical scheme:
the invention provides a balanced scheduling system based on a pulling mode, which can be used for producing small parts in the automobile industry.
The billboard is a virtual electronic flow billboard with the same theoretical concept as the billboard.
The billboard announcements are used to collect and display all the unused billboards.
The production task allocation pulling control unit creates a flow path of the flow billboard, and the flow billboard of the processing unit is controlled to flow to the processing unit of the subsequent process according to the sequence of the production process.
The processing unit can be set according to the production flow of the actual part, and comprises but is not limited to a grinding unit, a cleaning unit, a sawing unit, a milling unit, a part supermarket unit, an inspection unit, a part warehousing unit and the like.
The mobile billboard is marked with the information of the produced parts, the processing completion time, the name of the current production line, the name of the current working procedure, the material part number, the capacity of each box, the total quantity, the production quantity, the source working procedure, the target working procedure and the like.
A balanced production scheduling method applying the balanced production system based on the pulling mode comprises the following steps:
step one, a goods picking end sends a goods picking requirement, and a task flow billboard in a production system releases the goods picking requirement;
step two, distributing the production information of the signboards to all the signboards according to the actual task state;
step three, the mobile billboard carries production information and enters a processing unit;
step four, the downstream processing unit judges whether to carry out production according to the quantity of raw materials extracted from the upstream processing unit; if the raw materials of the downstream processing unit produced by the upstream processing unit meet the production requirement, the downstream processing unit obtains the raw materials produced by the upstream processing unit and then carries out production; if the raw materials produced by the upstream processing unit do not meet the production requirements of the downstream processing unit, transmitting production information to the upstream processing unit through the flow billboard, producing the raw materials by the upstream processing unit, and producing the raw materials by the downstream processing unit after the raw materials meet the requirements of the downstream processing unit;
and step five, finishing the billboard process after all production tasks are finished, and finishing production.
The whole production flow uses the same task flow board from raw materials to products, flows in the whole production line, is used for recording the information of the production state and can be transmitted to the previous and subsequent processes.
In the first step, the flow billboard releases the billboard after a finished product is obtained in actual production.
In the third step, the production information carried by the mobile billboard comprises the information of the produced parts, the processing completion time, the name of the current production line, the name of the current working procedure, the number of the material parts, the capacity of each box, the total quantity, the production quantity, the source working procedure, the target working procedure and the like.
In the fourth step, before the downstream processing unit produces, the model changing judgment operation is also included; if the type does not need to be changed, the same billboard is used for carrying out the task continuously; and if the model is required to be changed, the mobile billboard is changed into a model changing state, and the subsequent operation is carried out after the model changing is finished.
When the production of the product produced at one time is finished, the billboard is set to be in an idle state and put in billboard bulletins to wait for the next production process to be distributed again when the next production process is started.
Specifically, for a certain processing technology, A, B, C processes are involved, which can also be called as A, B, C three processing units, wherein the process sequence is as follows: c → A → B, the production and processing flow is as follows:
and S1, in a certain processing unit A, when the processing task of a mobile billboard in the processing unit A is completed, reading the identification number on the mobile billboard, wherein the identification number is used for designating the one-to-one correspondence of the workpiece and the billboard. After receiving the information of the flow signboard, the production task allocation pulling control unit transmits request information to a processing unit B of a next procedure of the production process A, and if the raw material of the processing unit B is enough for production conditions, S2 is executed; if the processing unit B is not enough to produce, the production task allocation pulling control unit controls the flow billboard to return to the upstream processing unit A to extract the raw material, and S2 is executed until the processing unit B is enough to produce; if the production raw material required by the processing unit a is insufficient when the kanban is returned to the upstream processing unit a to extract the raw material, S3 is performed;
s2, the flow billboard receives the control signal of the production task distribution pulling control unit, and moves to the next processing unit B, and the production task distribution pulling control unit displays the task of the flow billboard in the next processing unit B;
and S3, the production task distribution and pulling control unit returns the billboard to the last procedure C of the production process, namely, the billboard transmits a pulling demand to the processing unit C, and a production request is sent to the processing unit C for replenishing the production materials in the processing unit A.
Compared with the prior art, the invention has the following advantages:
1. the balanced production scheduling system based on the pulling mode is based on the basic principle of balanced production, and the flow board is used as the minimum flow unit of the pulling production, so that the problem that the basic principle of the balanced production is applied to the production mode of small parts in the automobile industry is solved.
2. The pull-mode-based balanced scheduling system simplifies the operation process of various small part production modes. The management personnel can more easily master the production progress of each order.
3. The balanced production scheduling system based on the pulling mode saves raw material consumption, saves site area and saves capital investment.
4. The balanced scheduling system based on the pulling mode can calculate the delivery date of the product more accurately and more finely, conforms to the higher and higher requirements of customers on the delivery date of the product, and can bring indirect benefits.
5. The balanced production scheduling system based on the pulling mode has economic benefits and makes positive contribution to the national clean production and energy conservation and emission reduction strategies.
Drawings
FIG. 1 is a flowchart of a production scheduling method of the present invention.
Fig. 2 is a diagram of an operation system in the scheduling method of the present invention.
FIG. 3 is a process unit operating diagram in a scheduling system.
Detailed Description
The invention is further described in detail with reference to the following specific examples and the accompanying drawings. The procedures, conditions, experimental methods and the like for carrying out the present invention are general knowledge and common general knowledge in the art except for the contents specifically mentioned below, and the present invention is not particularly limited.
The invention designs a 'pull mode-based balanced scheduling system' according to the principle of balanced production. The system arranges production according to a pulling distribution mode for production tasks, so that a plurality of problems caused by the original production mode according to part orders can be avoided, waste is reduced, efficiency is improved, and production cost is reduced. As shown in fig. 1, the processing cycle of this system was less than 1 week, with an average of 3 days.
The design scheme of the 'pulling mode-based balanced scheduling system' is as follows:
and designing special 'pull mode-based balanced scheduling system' software to manage the operation of the whole pull production system.
In a scheduling system, production orders and parts are represented in the same flow bulletin board. The flow billboard is the smallest flow unit produced.
There is an upper limit to the load per flow sign, which is related to the number of machine-processable parts actually used in production, and the number of flow signs cannot exceed the maximum limit number at any one time.
The flow path of the flow sign can be created in a "pull mode based equalization production system". The production process comprises three procedures A, B and C, or A, B, C processing units, wherein the workpiece is processed from the completion of the processing of the procedure A to the processing of the procedure B, and the workpiece is conveyed to the next procedure C after the processing of the procedure B is completed. And the production task is to achieve flow in a pulling manner: the first process step a provides or processes the part only if the part is needed for the next process step C.
The direction of the pulling information flow is opposite to the direction of the product production flow. The pulling information flows from the next procedure C to the next procedure B and then to the previous procedure A; and the product is produced from processing unit a to processing unit B to processing unit C.
After the processing unit completes the processing task, the flow signboard is assigned to the next process step C as long as the flow signboard is read. The "pull mode based equalization scheduling system" can then automatically issue production requests from post B currently being processed to the next process a. The 'pull mode based balanced scheduling system' automatically schedules the production of each work post according to each received production request.
In the "pull-mode based balanced scheduling system", a flow billboard is provided for each processing unit. At a certain processing unit, when all processing tasks in the processing unit pointed by one flow billboard are completed, the flow billboard is read once. This operation will be processed as follows, depending on the state of the processing unit:
1. and if the task in the flow billboard corresponding to the processing unit is completed, requesting to move the flow billboard to the next processing unit.
2. If the raw material of the flow billboard represented by the next processing unit C is available for production, the 'balance production scheduling system based on the pulling mode' judges whether the model CHANGE is needed, if the model CHANGE is not needed, the flow billboard can carry out the task according to the billboard to carry out the production, if the model CHANGE is needed, the flow billboard is converted into the model CHANGE (CHANGE _ OVER) state, waits for the completion of the model CHANGE, and then the production is carried out after the completion of the model CHANGE.
3. If the next processing unit C raw material is not satisfied, the "pull mode based equalization scheduling system" returns this flow billboard to the upstream processing unit B of the next processing unit C for pick-up until the next processing unit C raw material is satisfied.
4. If the next processing unit C has just a vacancy, i.e. there is no raw material available for production at the processing unit C, then the current processing unit B can supply production material to the next processing unit C while a vacancy is present at the current processing unit B. That is, the processing unit B in a certain step has already transmitted the pulling information with the free bit to the processing unit in the preceding step a.
The pulling information is transmitted along the production line all the way to the processing unit a of the first process. When a vacancy occurs in this processing unit a, the vacancy requests an allocation of a production task to the "pull-mode-based equalization scheduling system". Thus, the pulling production of the whole production line is realized.
The protection of the present invention is not limited to the above embodiments. Variations and advantages that may occur to those skilled in the art may be incorporated into the invention without departing from the spirit and scope of the inventive concept, and the scope of the appended claims is intended to be protected.
Claims (10)
1. A balanced production scheduling method based on a pulling mode is characterized by comprising the following steps:
step one, a goods picking end sends a goods picking requirement, and a production system releases a task flow billboard;
step two, distributing the production information of the signboards to all the signboards according to the actual task state;
step three, the mobile billboard carries production information and enters a processing unit in the production flow;
step four, the downstream processing unit judges whether to carry out production according to the quantity of raw materials extracted from the upstream processing unit;
and step five, finishing the billboard process after all production tasks are finished, and finishing production.
2. The scheduling method of claim 1 wherein the whole set of production process flows from raw material to product using the same task flow board, flows through the whole production line, records information of production status, and transmits the information to the previous and subsequent processes.
3. The method of scheduling of claim 1 wherein the flow billboard is a virtual electronic flow billboard that flows in a scheduling system.
4. The method of claim 1, wherein in step one, the flow billboard is released after the actual production to produce the finished product.
5. The scheduling method of claim 1 wherein in step three, the production information carried by the flow billboard includes information of parts produced, time of completion of processing, name of current production line, name of current process, material number, capacity per box, total quantity, production quantity, source process, destination process.
6. The scheduling method of claim 1 wherein in step four, if the raw material of the downstream processing unit produced by the upstream processing unit meets the production requirement, the downstream processing unit performs the production after obtaining the raw material produced by the upstream processing unit; if the raw materials produced by the upstream processing unit do not meet the production requirements of the downstream processing unit, the production information is transmitted to the upstream processing unit through the flow billboard, the upstream processing unit produces the raw materials, and the downstream processing unit produces the raw materials after the raw materials meet the requirements of the downstream processing unit.
7. The scheduling method of claim 1 wherein in step four, said downstream processing unit further comprises a type change determination operation prior to production; if the type does not need to be changed, the same billboard is used for carrying out the task continuously; and if the model is required to be changed, the mobile billboard is changed into a model changing state, and the subsequent operation is carried out after the model changing is finished.
8. The scheduling method of claim 1 wherein when the production of a product from a production run is completed, the billboard is set to idle and announced to wait for a next production run to be re-allocated.
9. A scheduling system for carrying out the scheduling method of any one of claims 1 to 8 wherein the system comprises one or more processing units, a flow billboard, a billboard announcement, a production task allocation pull control unit for flow between processing units.
10. The scheduling system of claim 9 wherein the processing unit is configured according to a production process of an actual part, and includes a grinding unit, a cleaning unit, a milling unit, a parts supermarket unit, an inspection unit, and a parts warehousing unit;
the mobile billboard is marked with production information, including part information, processing completion time, current production line name, current process name, material number, capacity of each box, total quantity, production quantity, source process and target process;
the production task allocation pulling control unit is connected with each processing unit and each flow billboard, a flow path of the flow billboard is established in the production process, and the flow of the flow billboard between the processing units is controlled;
the billboard announcements are used to collect and display all the unused billboards.
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