CN-121981658-A - Automatic production line-to-line workpiece intelligent caching method, system and production device

CN121981658ACN 121981658 ACN121981658 ACN 121981658ACN-121981658-A

Abstract

The invention discloses an intelligent workpiece caching method, system and production device between automatic production lines, and belongs to the technical field of automatic production. The method comprises the steps that an MES system generates a warehouse-in task and sends the warehouse-in task to a WCS system, the WCS system sends an instruction for transferring workpieces which are offline from a machining production line to a buffer warehouse to automatic transfer equipment, the MES system distributes target goods positions for the warehouse-in workpieces according to preset warehouse position distribution rules, the warehouse position distribution rules comprise constraint conditions that the same goods channels only store the same workpieces, when preset warehouse-out conditions are met, the MES system selects the warehouse-out workpieces according to preset priority rules and generates the warehouse-out task and sends the warehouse-out task to the WCS system, the WCS system sends an instruction for transferring the workpieces in the buffer warehouse to a post-treatment procedure to the automatic transfer equipment, and the MES system preferentially combines the workpieces which can be grouped into a group to generate the group-out task when the warehouse-out according to the group machining requirements of the post-treatment procedure and matches the machining beats of the post-treatment procedure.

Inventors

SHI HAOJIE
HU YUANYUAN
Lan Yuran
MEI XUEFENG
Min Songtao

Assignees

西安法士特汽车传动有限公司

Dates

Publication Date: 20260505
Application Date: 20251231

Claims (10)

1. An intelligent caching method for workpieces among automatic production lines is characterized by comprising the following steps: When the preset warehousing conditions are met, the MES system generates a warehousing task and issues the warehousing task to the WCS system, and the WCS system sends an instruction for transferring the workpiece which is offline from the machining production line to the cache library to the automatic transfer equipment; the MES system allocates target goods positions for the warehouse-in workpieces according to a preset goods position allocation rule, wherein the goods position allocation rule comprises constraint conditions that the same goods channel only stores the same workpieces; when the preset ex-warehouse conditions are met, the MES system selects ex-warehouse workpieces according to preset priority rules and generates an ex-warehouse task, the ex-warehouse task is issued to the WCS system, and the WCS system sends an instruction for transferring the workpieces in the buffer library to a post-treatment procedure to automatic transfer equipment; The MES system preferentially combines the unitized workpieces to generate a unitized delivery task when delivering according to the unitized processing requirement of the post-processing procedure, and the processing beats of the post-processing procedure are matched; and after the post-treatment procedure receives the workpiece and confirms, feeding back a processing starting signal to the MES system, and updating the stock state and the task record by the MES system to complete the whole-flow scheduling closed loop.
2. The intelligent caching method for workpieces among automatic production lines according to claim 1, wherein the preset warehousing conditions comprise at least one of the following: the automatic triggering condition is that the number of the offline queues of any machining production line is not less than a preset threshold N 1 , and the offline tasks of the post-treatment process are not matched within a preset time T 1 ; the manual triggering condition is that the manual switching is carried out to a manual warehouse-in mode through an MES system interface, and the offline workpieces of the machining production line are temporarily not involved in the matching of the post-treatment procedures and all enter a cache; And (3) overflow triggering conditions, namely when the offline speed of the machining production line instantaneously exceeds the throughput capacity of the post-treatment procedure, automatically transferring the exceeding part of workpieces into a buffer warehouse according to overflow rules by a system.
3. The intelligent caching method for workpieces among automatic production lines according to claim 1, wherein the library bit allocation rule specifically comprises: filling shallow positions preferentially to keep alignment with the depth of the workpiece, for a single group of workpieces, searching idle shallow positions of the same workpiece, and starting a new goods channel when the idle shallow positions are not found; for the workpieces which can be grouped, the shallow position and the deep position of the same goods channel are distributed and fully occupied at one time, so that the synchronous delivery of the workpieces in the same goods channel is ensured.
4. The intelligent caching method for workpieces among automatic production lines according to claim 1, wherein the preset ex-warehouse conditions comprise: The inventory proportion of the cache library is more than or equal to a preset proportion P%, the number of the offline queues of all the associated machining production lines is less than a preset threshold M, and meanwhile, available work sites exist in the post-treatment process, wherein the preset priority rule comprises a first-in first-out rule, and the warehousing time of the workpieces in the deep position of the cache library is taken as a first-in first-out judgment standard.
5. The intelligent caching method for workpieces among automatic production lines according to claim 1, wherein the group processing requirements are specifically as follows: The MES system judges the current receivable grouping configuration of the post-treatment process, wherein the current receivable grouping configuration comprises the number of workpieces which can be treated simultaneously and a compatible workpiece set, if different goods way workpieces which can be combined into the grouping configuration exist in the buffer library, the grouping and delivery tasks are preferentially generated, and if the grouping cannot be combined, the delivery tasks are generated according to single-stack workpieces, so that the material changing frequency of the post-treatment process is reduced.
6. The intelligent caching method for workpieces among automatic production lines according to claim 1, further comprising the step of exception handling: When the production line master control or the MES system receives a fault signal of the post-treatment procedure, the MES system immediately stops the automatic delivery task corresponding to the post-treatment procedure, and switches the offline work piece of the machining production line to a warehouse-in mode to be completely transferred into a slow warehouse, and after the post-treatment procedure is recovered to be normal, the MES system selects a continuous delivery mode or a direct-pull mode of the machining production line to recover production according to the inventory state and the production priority, so that the continuous operation of the machining production line and the cleaning forced spraying unit is ensured.
7. The intelligent caching method for workpieces among automatic production lines according to claim 1 is characterized in that unique identification codes are arranged on the workpieces, the identification codes comprise information of a workpiece number, a frame code, a group number and a batch number, the warehousing tasks and the ex-warehouse tasks comprise information of task numbers, the workpiece number, starting points and target addresses, and a WCS system and automatic transfer equipment feed back task execution states and abnormal codes to an MES system to achieve full-flow traceability of the workpieces.
8. The intelligent caching method for workpieces among automatic production lines according to claim 1 is characterized in that the post-processing procedure comprises a cleaning procedure and a forced spraying procedure, an MES system supports inventory early warning and warehouse age management, when the occupancy rate of goods space or the warehouse age exceeds a preset threshold value, a priority warehouse-out strategy is triggered and an alarm report is generated, and the preset threshold values support flexible configuration through an MES system interface.
9. An intelligent workpiece buffer system between automatic production lines, comprising: the system comprises a warehousing module, a WCS system, a machining production line, a buffer library and a machining production line, wherein the warehousing module is used for generating a warehousing task by the MES system and issuing the warehousing task to the WCS system when a preset warehousing condition is met, and the WCS system sends an instruction for transferring the workpiece which is offline from the machining production line to the buffer library to the automatic transfer equipment; The warehouse position distribution module is used for distributing target warehouse positions for warehouse-in workpieces according to preset warehouse position distribution rules by the MES system, wherein the warehouse position distribution rules comprise constraint conditions that the same warehouse passage only stores the same workpieces; The ex-warehouse module is used for selecting ex-warehouse workpieces according to a preset priority rule by the MES system when the preset ex-warehouse condition is met, generating an ex-warehouse task and issuing the ex-warehouse task to the WCS system, and the WCS system sends an instruction for transferring the workpieces in the buffer library to a post-treatment procedure to the automatic transfer equipment; The ex-warehouse group generating module is used for preferentially combining the workpeices capable of being grouped to generate a group ex-warehouse task when the MES system performs ex-warehouse according to the group processing requirement of the post-treatment procedure, and the processing beats of the post-treatment procedure are matched; and the full-flow closed-loop confirmation module is used for feeding back a processing starting signal to the MES system after the work piece is received and confirmed by the post-processing procedure, and the MES system updates the stock state and the task record to complete the full-flow dispatching closed-loop.
10. The intelligent workpiece buffer production device between automatic production lines is characterized by comprising a machining production line, a cleaning strong spraying unit, a buffer bank, a single fork RGV, a plurality of AGVs, a short buffer roller way, a first code scanning point and a second code scanning confirmation point, wherein the buffer bank is arranged between the machining production line and the cleaning strong spraying unit, adopts a double-deep-position goods channel structure with a configurable total number of goods positions, the short buffer roller way is arranged at a lower line end of the machining production line, the first code scanning point is arranged on the short buffer roller way and is used for collecting information of workpieces on the lower line of the machining production line, the single fork RGV is arranged in the buffer bank and is matched with the double-deep-position goods channel and is used for realizing the operation of the upper frame and the lower frame of the workpieces in the buffer bank, the AGVs are used for short-distance transportation, the transportation paths of the AGVs are respectively connected with the small-size buffer bank openings of the short buffer bank and the small-size buffer bank, the small-size buffer bank openings of the RGV and the strong spraying unit, and the strong spraying unit are used for collecting information of the workpieces on the upper line of the buffer bank, and the strong spraying unit is used for confirming the workpieces on the position of the upper line.

Description

Automatic production line-to-line workpiece intelligent caching method, system and production device Technical Field The invention belongs to the technical field of automatic production, and relates to an intelligent caching method, an intelligent caching system and an intelligent caching production device for workpieces among automatic production lines. Background The surface quality and fatigue strength of the mechanical parts of the gear shaft of the commercial vehicle gear box are used as the core parts of the transmission system to directly determine the running stability and the service life of the gear box. After the machining of the parts is finished, impurities such as cutting fluid, metal scraps and the like are easy to remain on the surfaces, and the impurities are required to be treated through cleaning and strong spraying (shot blasting or high-pressure cleaning) procedures, so that the surface pollutants can be removed, the fatigue resistance of the parts can be improved through the surface strengthening effect, and the use requirements of high-strength working conditions of commercial vehicles are met. Along with the continuous improvement of the product quality requirements of the commercial vehicle industry, the cleaning and forced spraying procedures become key quality control links for the production of gear shaft parts, and the processing efficiency and stability of the gear shaft parts directly influence the capacity release of the whole production line. Currently, the intelligent manufacturing technology is increasingly widely applied in the field of automobile part production, AGV/RGV automatic transfer equipment, a WMS warehouse management system, a WCS equipment control system and an MES production execution system are generally introduced in the links of assembly lines, finished product three-dimensional warehouse, inter-vehicle whole piece conveying and the like in manufacturing industry, and high efficiency of workpiece circulation and traceability of the production process are realized through deep integration of automation and informatization. However, in the scenes of high-frequency production, batch output and multi-type mixed line processing of gears, shafts and the like, the link between the machining process and the cleaning forced spraying process still faces a remarkable technical bottleneck, and becomes a short plate for restricting the improvement of the overall efficiency of the production line. On the one hand, the tooth shaft type parts have quick machining beat and high single-day yield, the joint logistics are required to have high-frequency response capability, and on the other hand, the cleaning parameters and the strong spraying process of the parts of different types have differences in the multi-type mixed line production mode, and the parts are required to be sent into cleaning equipment in groups according to the types, so that efficiency loss caused by process switching is avoided. In the prior art, the three-dimensional warehouse system is designed for long-term storage of finished products or large batches of workpieces, and the AGV/RGV system focuses on long-distance and low-frequency whole piece transportation, so that the connection requirements of short-time buffering, high-frequency transportation and grouped transportation are difficult to adapt. In the actual production process, the problems of mismatching of the scene specificity and the technical scheme are more remarkable, namely, the continuous blanking of the machining production line and intermittent treatment of cleaning strong spraying equipment form beat difference, the debugging time of the cleaning equipment when the model is switched and the downtime caused by occasional faults often cause the blocking backlog of a blanking port of the machining production line or the long-time idle waiting of the cleaning equipment, and due to the lack of a special small-sized buffer device and a targeted intelligent pulling strategy, when the production line has beat unbalance or equipment faults, enterprises rely on manpower to carry parts to a temporary area, so that the labor intensity is high, the problems of workpiece confusion, batch mismatch and the like are easily caused, the production tracing chain is broken, the quality control requirement cannot be met, and under the multi-model mixed flow production condition, the traditional 'first-in first-out (FIFO)' scheduling strategy cannot meet the group processing requirement of the cleaning equipment, and the simple group scheduling can cause the backlog of part models, cause the new problems of frequent material replacement, equipment and the like, and further lower the whole operation efficiency of the idle line. The invention of China patent application No. 202211518440.7 discloses a related process connection logistics technical scheme of an upstream and downstream logistics intelligent scheduling method, a system and a production line of a