A scheduling method and system for mixed flow production

Abstract

The invention discloses a method for scheduling mixed flow production, and relates to the field of production and manufacturing. The method includes the steps of setting the principle of machine allocation according to target requirements of workpieces and constraints of workshop states; performing initial allocation of jobs and machines by using minimum flexible workpiece rules and minimum flexible machine rules; setting scheduling conditions as that the current workload of each machine accounts for an approximately equal proportion of the total workload of the machines; according to compoundallocation rules, obtaining a function for calculating the priority of each job, the function being related to an attribute of the job or machine; and in the case that the scheduling conditions are satisfied, substituting initial allocation results of the jobs and machines into the function of the job priority to obtain the priority of each job, and further obtaining an allocation plan of the machines and a job ordering plan. The method for scheduling the mixed flow production in the invention can effectively allocate production lines and machine resources and is more flexible in scheduling and higher in efficiency.

Description

technical field [0001] The invention relates to the field of production and manufacturing, in particular to a scheduling method and system for mixed flow production. Background technique [0002] PCBA (Printed Circuit Board Assembly) equipment is composed of multiple PCB assemblies. Different SMT machines on the same production line in the PCBA factory complete the assembly of each PCB assembly in series. When a certain SMT machine assembles a PCB assembly Finally, the product moves to the next SMT machine position for the assembly of the next PCB assembly. [0003] Due to the variety of PCB board types, in order to meet the needs of diversified production, it is necessary to improve the flexibility of the SMT machine. Each SMT machine is assigned a number of different components. The SMT machine can assemble PCB boards of different product types. Different components, so that each SMT machine has different flexibility when assembling different types of PCB boards, and each...

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Problems solved by technology

[0005] On the other hand, PCB boards of different product types have different requirements for the type and quantity of components assembled at different positions in the PCB board, resulting in different completion times for PCB board assembly on different SMT machines in the PCBA factory

[0006] Therefore, the flexibility of SMT machines to assemble different product types of PCB board components will greatly increase the complexity of PCB board scheduling, and will affect the PCB board production scheduling plan, making how to reasonably allocate production lines and SMT machine resources becomes a part of scheduling. big problem

[0007] In the existing technology, PCB production scheduling is usually done manually, which is not only inefficient and inconvenient for scheduling, but also cannot effectively allocate production line and machine resources, resulting in waste of resources

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