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Cloud manufacturing (CMfg) is a new service-oriented networked manufacturing paradigm inspired by cloud computing. It provides high-efficiency and intelligent manufacturing services by organizing isolated manufacturing resources in a collaborative manner. Since the proposition of this concept in 2010, relevant research has mainly focused on theoretical frameworks of the CMfg system. However, actual applications of the machining service, which is a key part in the CMfg service platform, are hardly ever studied. In order to explore a feasible machining service mode, prime granularities of machining services are analyzed based on the current state of the manufacturing industry. Then a novel part manufacturing service combined with working procedure manufacturing service (PMS + WPMS) prime collaboration mode is proposed, followed by research of machining resource integration methods. To facilitate prospective implementations, information models of machining services are constructed using Web ontology language (OWL). The prime collaboration mode is expanded to a complete CMfg machining service platform. Furthermore, a working procedure priority-based algorithm (WPPBA) is designed for resource selection in CMfg. Finally, simulation experiments based on actual manufacturing data are conducted, in which the test results demonstrate the feasibility of the proposed service mode and the effectiveness of WPPBA compared with genetic algorithm (GA) and particle swarm optimization (PSO). This research provides essential guidance for CMfg applications.

Aiming at the shortcomings of manufacturing enterprises, cloud manufacturing (CMfg), as a new type of service-oriented manufacturing mode, is put forward recently. Due to the rapid development of information and other high-tech technologies, CMfg excellently satisfies the development requirements of modern manufacturing and gains some popularity. As one of the key characteristic for CMfg system, the management, sharing, and scheduling of resources and tasks will directly affect the accuracy and efficiency of CMfg service platform. In order to achieve the effective management, convenient use, and reliable transactions of resources and tasks, a framework of trust evaluation system in CMfg is established and a trust evaluation model of CMfg service platform oriented to mechanical manufacturing field is proposed. In this system, the weights of six trust evaluation indexes are obtained through analytic hierarchy process (AHP) method. Meanwhile, the quantitative and update algorithm for direct trust service is designed through a discrete method. Furthermore, the recommendation trust service is extracted through cloud theory model and cloud focus evaluation method. Experiments based on virtual transaction data are conducted to verify the validity and efficiency of the proposed trust evaluation model.

Cloud manufacturing (CM) is a new type of networked manufacturing model, which is proposed in 2010. Optimization technology is one of the key techniques for CM operation, which are used for the efficient integration of manufacturing resources. In all kinds of manufacturing resources, the machining equipment is one of the most important resources. Using optimization techniques to achieve optimal selection of machining equipment is rarely studied in the CM. In order to handle the optimization selection of machining equipment in CM, comparing with the existing resources optimal configuration, an optimal selection strategy is introduced for the machining equipment in CM. In the selection strategy, first, a multiple objective and binary integer programming model is proposed to describe the optimal selection of machining equipment in CM. Second, after analyzing the mathematical model and the real-world problem of the machining equipment selection in CM, the priority method is adopted to convert the multiple-objective problem into a single-objective problem. Third, an improved particle swarm optimization (IPSO) algorithm based on a novel encoding scheme and fitness function is presented to solve the single-objective mathematical model. Finally, the simulation experiments verify the effectiveness of the IPSO algorithm and show that the selection strategy is more objective and effective to help the client select the machining equipment in the CM than current resources optimization model. This research provides a theoretical support for the development of CM.