Applied Mechanics and Materials Vols. 10-12 (2008) pp 94-98 online at http://www.scientific.net © (2008) Trans Tech Publications, Switzerland Online available since 2007/Dec/06
Web-based Process Database Support System for Green Manufacturing Z.G. Jiang1,a, H. Zhang1,b and M. Xiao1,c 1
College of Mechano-automation, Wuhan University of Science & Technology, 430081, China a
[email protected],
[email protected],
[email protected]
Keywords: Process database, Green manufacturing, Support system
Abstract. Process database support system is one of the key technologies for green manufacturing implementation. In this paper, the process database support system for green manufacturing was developed with Browse/Server (B/S) three level structure on the basis of Web, which has the function of distributed processing and storage of the data. The composing and its green characteristics were discussed in detail respectively. Furthermore, the key develop technology of the database system, such as network requirement, assistant planning and green assessment of process and the accessing to the database were analyzed. A case study was performed to illustrate and examine the validity of the database system. Introduction Green manufacturing is imperative for the serious environmental problem of modern manufacturing industries. The implement of green manufacturing need process database support system to provide process data information for green process design, promoting the optimization in process planning. As one of the most popular Internet tools, the web aims to provide a light-weight and an operating system independent platform for users to search, browse, retrieve and manipulate information disseminated and shared remotely[1]. Realizing the merits of web technology and the need of green manufacturing implement, a web-based system has been studied to support the implementation of green manufacturing in this paper. The system can serve as a platform for process designers to carry out process planning activities through optimizing the selection of machining resources, determination of set-up plans and sequencing of machining operations of a design model. The Function and Characteristic of Process Database Support System for Green Manufacturing Function of the Process Database Support System. A) This process database can provide required digital information of relevant criteria and consulting data such as processing methods, machining parameters, green material, process equipments, etc. B) The process database makes quantitative calculation and analysis of green manufacturing process to compare with practical results. C) The massive data from the process database can act as not only a kind of information of production management but also the reference data, while the management and environmental protection department take assessment of practice manufacturing or make relevant policy and laws. Characteristic of the Process Database Support System [2~4]. The characteristics of process database support system for green manufacturing include following sections: green, commonality, distribution, flexibility etc. Green. Considering the lack of perfect process database inquired about information conveniently and its lowly intelligent degree, this database adds green database and knowledge database on the basis of the present database system, in order to realize green planning of manufacturing process increasingly easily and to achieve optimized effect in resource consumption and environmental impact.
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Commonality. The present process database is usually lack of commonality and agreement criteria, and is filled with mass of redundant data. So it is demand urgently to construct a universal process database system. According to the complexity and multiplicity of manufacturing process, manufacture resources and environment, this support system adopts framework structure and has strongly independence of networks, so as to store tremendous data, decision-making of process planning and system integrated interface. Distribution. This process database adopt distributed engineering database, which is an integrated system and aggregation on logical but is distributed in areas. Furthermore, it is managed and controlled by the distributed database management system which involves manager, organizer and checker, so as to accomplish the regulation verification, data description and indication. Thus, it can set up various system structures, but rarely depend on certain center field. Flexibility. At present technological condition, flexibility is generally demanded to a database to improve data, which is an opened developing platform that provides the second development condition to fit practice manufacturing including production capacity, manufacturing process and properties. cust omer s
output
Network interface
data evaluation and certification
application development system HTTP Request
HTTP Response
Web Sever SQL Response Part information database equipment resource database
performance data of resource and Environment database
SQL Request Green material database Green process database
Cutting parameter database
Fig.1 Web-based Framework of process database support system for green manufacturing
Web-based Framework of Process Database Support System for Green Manufacturing Framework of Process Database Support System. According to the framework of process database in existence and the state-of-the-art of the technique of computer and database, the process database support system for green manufacturing adopts the system construct based of B/S, which is a mode composed of customer layer, middle layer and data layer. In the system structure, customer layer is used to interactive operation with manager, organizer, checker etc, so as to accomplish the regulation verification, data description and indication; Middle layer is application server, which deal with the enterprise vocational logic(such as the logical modular of system management, resource database, process knowledge database, process specification regimentation and process ability assessment etc ) and exchange the data with data service; Data layer is database service, which is used to dispose the data request of application service and return the request result. This framework with the function of distributed storage and processing data, and the merit of dynamic and easy to expansion, as presented in Fig.1. Function Modules of Process Database Support System. The process database support system for green manufacturing mostly comprises database layer, data source, system of data evaluation and certification, application development system, network and communication interface, output and customers.
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Database Layer. It include multi-base such as part information, green material, performance data of resource and environment, equipment resource, green process, cutting parameter and other data etc. Thereinto: ① part information: the intent of part basic information base is to store the basic information of part such as outline dimension, required precision and material etc; ② green material: put the name, category and machining property of various material(include blank material),especially, logging the green material data of good machining property, easy to recovery and little environmental impact; ③equipment inventory: machine base log-in the style, machining accuracy, appearance and weight of machine, furthermore, the noise figure and no-load power of various machine at different rotational speed are logged; Tool base log-in the basic information of brand, material, machining species and tool attrition rate per workpiece; Fluid base log-in the name, parameter, corrosive, virulence, rust protection and applicability; Measuring device base log-in detection tool of difference size and required precision for the workpiece; ④ performance data of resource and environment: include the performance data during various typical process such as foundry, press working, welding, machining, non-traditional machining, heat processing, capping, assembly and packaging etc; ⑤ Green process: log-in the typical process and process technology, the latter includes the process technology of advanced manufacturing and green manufacturing; ⑥ Cutting parameter: log-in the selection principle and selection method of parameter as cutting depth, cutting speed and amount of feed etc. Data Source. The involved data sources of process database include the cutting parameter, machine, tool, clamping, material and model supported by factory, lab, documentation etc. Data Evaluation and Certification. Validate the green performance of data supported by database or input to database. Application Development System. Fulfill the task of data inquiry, log-in, modification, renewal, deletion, optimization, transmission, and the function of process planning, process scheme evaluation and database management. Key Technology of Database Development The process database support system for green manufacturing based on web can make the process design department of enterprises share the information, co-working and course management and can realize desterilizing, standardization, networking of the process design and management for green manufacturing to reduce the resource consumption and environmental impact. In order to develop the process database support system for green manufacturing possessing the above functions, the following key technologies should be involved: Knowledge Data. The process database support system need a large of process equipments and performance data of resource and environment, involving a lot of data such as machine, tool, fluid, material, resource consumption (include raw material and energy consumption), environmental impact (include waste gas emission, waste fluid emission, waste disposal and noise etc). However, green manufacturing has not developed for a long time, so the process data and information related to it is incomplete, moreover, some of it is blank. Therefore, the data collection is difficult and complex. The work should not only require to inquiry the manual data on the process and environment protection in possession but also combine to concrete process experience and collect the first-hand data. In the meanwhile, the process technology of green manufacturing such as green machining should be adopted when constituting the process database support system for green manufacturing. The system adopts these new technology can reduce the resource and energy consumption or short the development cycle and cost reduction. Key Technique of Accessing to Database. In order to make the process database support system for green manufacturing possess commonality and have transplantation, the system adopts the
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newest technology of network database programming-SQL2003 [5]. In addition, the core of the technology on solving the accessing mode is JSP(Java Server Pages)+Servlet+JDBC (Java Database Connectivity)+JavaBean, a technology supported by Sun Company. And it solves the ideal choice of data processing of the process database support system for green manufacturing based of web mode. Jsp+Servlet + Javabean + JDBC has become the advanced technology with most superiority and development potentiality in the condition of Web environment JSP programs execute on the Web server, and summit the result to the browser in the form of HTML, So the user can import, upgrade and delete the database information related to the web server through carrying out the SQL statement. Safety Management of Database System. The safety of enterprise internet application can be obtained by the using of firewall between intranet and internet, meanwhile, the information inside of enterprise should be controlled by strict customer password and some safety measures of application services. The application system confirms customer’s identity, manage users with different authority, allocate page having various secrecy information etc by making programmed. At the web browser, customers possessing definite authority can enroll the database system by Internet realizing the operation of process specification and information about process resource for green manufacturing. After enrolling system, user can input corresponding green process descriptor and submit to application service by HTTP protocol, then the Jsp page will be active and the required process design modular is withdrawal according to descriptor. Case Study According to the system architecture established above, the process database support system of green manufacturing process is developed, using the JSP+JAVABEAN+SERVLET and the newest network database programming technology, SQL SEVER. A gear part (Drawing: YB3120-90301) is used as a case to introduce the operation flow of the process design.
Fig.2 Procedure of machining tool selection in process database support system
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The craft person input the part to be processed under the guide of the system, then the system call the template process route from the craft database, gaining the basic process procedure: 1) rough turning→2) drilling→3) hardening→4) turning→5) hobbing→6) benching→7) shaving→8) reaming→9) broaching→10) benching→11) grinding→12) honing. Then, aiming at the critical process to be optimized, such as the machining tool selection, craft personnel confirm several feasible machining that can satisfy the machining requirement. Finally, craft personnel carry on green evaluation to the selected machining tool, and then choice the best one to respond to the request of green manufacturing through the interactive operation with the system. The procedure is showed as Fig. 2 A machine factory has adopted the selected machining tool according to the system, and created remarkable comprehensive economic benefit actually. The result in the case study shows that the process database system for green manufacturing process in this paper is practical. Conclusion In order to promote the implementation of green manufacturing, the techniques of Web, database and process planning for green manufacturing are integrated, on the basis of that, the process database support system for green manufacturing based on web is developed in this paper. This system can develop the particular advantages of Web and database, make the application system have advantages of openness, versatility and simplification etc, and provide condition for the sharing of process data information for green manufacturing and green design of process specification. Furthermore, the system can supply the green evaluation to the manufacturing process. Acknowledgement This research reported in the paper is supported by the Research Fund of National Natural Science Foundation (NO.70571060), Doctoral Program of Higher education (NO. 20060488001) and National Science and Technology supporting program (NO.2006BAF02A03), China. References [1] W. D. Li, S. K. Ong and Y. C. Neea: Computer-Aided Design, Vol.37 (2005), pp.921-930. [2] F. Liu and H.J. Cao: Chinese Mechanical Engineering, Vol.11 (2000) No.9, pp.979-982. [3] F. Liu and H. Zhang: Journal of Mechanical Engineering, Vol.35 (1999) No.5, pp.11-15. [4] H.J. Cao and F. Liu: Computer Integrated Manufacturing Systems, Vol.12 (2002) No.8, pp.978-982. [5] J.Z. Li and S. Wang: The systematic principle of the database (Electronic Industry Press, 1998).
