Abstract
The high maintenance costs and low reliability of automatic production line are attributed to the complexity of maintenance management. In the present study, a preventive maintenance strategy for the automatic production line was developed based on the group maintenance method. The criticality of machines in the production line was evaluated, and then the machines were classified into three groups: the most critical machines, the secondary critical machines and the general machines. The general machines were performed on the breakdown maintenance. The preventive maintenance model of the most critical machines was established with the shortest shutdown time as decision objective on basis of the Delay-time theory. The maintenance model of the secondary critical machine was established based on the considering of reliability-maintenance cost. A case study on an automotive part automatic production line was carried out to verify the proposed preventive maintenance strategy based on the production line data, and the maintenance periods of the most and secondary critical machines were gained; meanwhile, the machines all satisfied the reliability requirements during the maintenance periods.
Highlights
An automatic production line is an important part of the manufacturing system in the modern industrial field owing to the enormous advantages of high yield, good product quality and labor cost saving [1,2,3]
Because the working conditions of machines in the production line are different and the machine reliability is different from each other, if all machines in entire production line are performed on breakdown maintenance or preventive maintenance in the same maintenance period, it is difficult to meet the requirements of high reliability, high operating rate and low maintenance costs [6,7,8]
The machines were classified into three groups: the most critical machines, the secondary critical machines and the general machines
Summary
Received: 22 August 2018; Accepted: 28 September 2018; Published: 30 September 2018. Featured Application: The preventive maintenance strategy developed in present study can be employed for an automatic production line in the industrial field
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