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Optimization scheduling method for sheet metal machining process in manufacture of computer case

A technology for optimizing scheduling and processing, applied in the direction of electrical program control, control/regulation system, program control, etc., to improve production efficiency and shorten sheet metal processing time

Inactive Publication Date: 2018-12-11
KUNMING UNIV OF SCI & TECH
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Problems solved by technology

[0004] The technical problem to be solved in the present invention is aimed at the scheduling problem of the printing process in a flexible processing environment, and is to provide an optimal scheduling method for sheet metal processing in the production process of computer mainframe chassis in consideration of the uncertain sheet metal processing time. By solving high-quality solutions for sheet metal production scheduling, shorten sheet metal processing time and improve production efficiency

Method used

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  • Optimization scheduling method for sheet metal machining process in manufacture of computer case
  • Optimization scheduling method for sheet metal machining process in manufacture of computer case
  • Optimization scheduling method for sheet metal machining process in manufacture of computer case

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Embodiment 1

[0039] Embodiment 1: as Figure 1-5 As shown, an optimal scheduling method for the sheet metal processing process in the manufacture of computer mainframe chassis. Firstly, through on-site measurement or prior knowledge, the uncertain processing time is represented by fuzzy numbers. Affected by many uncertain factors, the processing time cannot be accurately predicted, and the completion time and delivery date can only be estimated within a certain range, so triangular fuzzy numbers are used here to represent the processing time and delivery date. Each operation O i,j Indicates the jth process of sheet i, it is in the machine M k The processing time on is expressed by triangular fuzzy number (TFN) as in Indicates the minimum processing time, represents the most probable processing time, represents the maximum processing time; the completion time of each operation is expressed as Each number in turn represents the minimum completion time, the most likely completion t...

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Abstract

The invention relates to an optimization scheduling method for the sheet metal machining process in the manufacture of a computer case, and belongs to the technical field of intelligent optimization scheduling in a production workshop. The method comprises firstly expressing the uncertain machining time by a fuzzy number by means of field measurement or prior knowledge; then determining a scheduling model and an optimization target of the sheet metal machining in the production process of the computer case, and optimizing an optimization objective by using an optimization scheduling scheme based on a genetic algorithm, wherein the scheduling model is established based on the machining completion time of computer case metal plates in each batch on each machine, and the optimization objective is the minimized earliest completion time. The method makes the sheet metal machining order and the machine distribution order clear by using a two-stage coding method, represents the uncertain machining time and the completion time by using the triangular fuzzy number, is close to an actual production situation, has global search guidance, can retain the historical information of dominant individuals to some extent, and guarantees the global search a certain width.

Description

technical field [0001] The invention relates to an optimal scheduling method for a sheet metal processing process in the manufacture of computer mainframe chassis, and belongs to the technical field of intelligent optimal scheduling of production workshops. Background technique [0002] As the core structure of the computer, the mainframe chassis protects the internal functional components and is the bridge connecting the central processing unit and the user. It can be said to be the most important part of the computer. In order to make the chassis meet the ideal standard in the hearts of users, major computer manufacturers have invested considerable energy in the shape and quality of the chassis. With the increasingly fierce market competition, how to effectively improve the manufacturing efficiency of each link in the chassis manufacturing process is the key to improving the economic benefits and market competitiveness of enterprises. [0003] Sheet metal is a process for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/418
CPCG05B19/41865G05B2219/32015Y02P90/02
Inventor 钱斌李尚函胡蓉
Owner KUNMING UNIV OF SCI & TECH
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