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Production plan dynamic adjustment method for coping with machining sequence change

A production planning and dynamic adjustment technology, applied in program control, comprehensive factory control, comprehensive factory control, etc., can solve the problems of tedious calculation, time-consuming, error-prone, etc., to improve the use efficiency, facilitate subsequent changes, and avoid sharp time spans. increased effect

Active Publication Date: 2020-04-10
SOUTH CHINA UNIV OF TECH
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AI Technical Summary

Problems solved by technology

In actual production scenarios, dispatchers often need to manually adjust the production plan when the processing sequence changes, and the calculation is cumbersome, time-consuming and error-prone

Method used

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  • Production plan dynamic adjustment method for coping with machining sequence change
  • Production plan dynamic adjustment method for coping with machining sequence change

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Experimental program
Comparison scheme
Effect test

Embodiment

[0026] A method for dynamic adjustment of production plan in response to changes in processing order, such as figure 1 shown, including the following steps:

[0027] S1. Identify all processes whose processing sequence is delayed and add them all to the process set H whose start processing time may be adjusted;

[0028] S2. For each process in the set H, its start processing time depends on the end time of the previous process of the assigned task and the end time of the previous process of the allocated machine, and recalculate the earliest start processing time as the process according to this dependency The new start processing time of , delete the process from the set H; if the new start processing time of the process is greater than the original start processing time, then add the process whose start processing time is affected to the set H;

[0029] The process whose start processing time is affected includes the next process of the machine assigned to the start process...

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Abstract

The invention discloses a production plan dynamic adjustment method for coping with a machining sequence change. According to the method, all associated processes can be identified based on the process with a changed machining sequence, the conflict between the delay of the process production time and the machine occupation situation is disposed, and the production plan after the production sequence is changed is optimized. The existing production plan adjusting method mainly pays attention to coordination of material assembly and procedure execution and does not involve the situation of machining sequence change, so that a dispatcher needs to manually complete adjustment of a production plan, calculation is tedious and time-consuming, and the error rate is high. According to the production plan dynamic adjustment method, on the premise that the production plan is correct and feasible, tedious calculation is automatically completed, the situation that the time span of the production plan is sharply increased after the machining sequence is changed is avoided, meanwhile, the principle of maintaining the original plan deployment as much as possible is followed, and subsequent changeof the machining sequence is facilitated.

Description

technical field [0001] The invention relates to the technical field of production planning and scheduling in the manufacturing industry, in particular to a method for dynamically adjusting production planning in response to changes in processing sequences. Background technique [0002] Production planning has a direct and important impact on the production efficiency of manufacturing enterprises. At present, many technologies focus on the automatic generation of production plans, such as dealing with the relationship between material supply and process execution. However, there are many constraints in the actual environment, and the general method may not be fully applicable to differentiated workshop production problems. Therefore, the automatically generated production plan needs to allow on-site dispatchers to make adjustments. Due to the dependencies between processes and the occupancy properties of machines, even a change in the processing sequence of a single process ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/418
CPCG05B19/41865G05B2219/32252Y02P90/02
Inventor 黄翰苏俊鹏李刚
Owner SOUTH CHINA UNIV OF TECH
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