Analysis of the CNC machine shop management system for the analysis and development

Paper Keywords: CNC network planning
Abstract: From the NC machine tool management system design workshop starting to build the system structure model and system framework, defined the needs and goals, planning the system's specific functions and tasks.


CNC machine shop management system is to create systems for enterprises to improve productivity and development equipment, which makes business management can visually CNC equipment for the plant life cycle processing. The analysis of machine tool management system is the basis for system development planning and preparation phase, therefore, to grasp the system from the general goals and specific functional tasks, providing direction for the system implementation and technical feasibility.


1 System Architecture

1.1 system architecture model
With computer technology and the rapid development of network technology, Internet in the development worldwide more quickly, has become the world's largest and most resource-rich computer information network system, at the same time, based on local and wide area network technology to develop the enterprise network Intranet technology has been developing rapidly in this system is the use of Internet / Intranet architecture model for system development and planning, the system structure model shown in Figure 1.1.

The system uses a three-tier architecture are: the presentation layer, function layer and data layer, they are divided into three separate units:

The first layer, said layer: Web Browser
This layer contains the system's display logic in the client, whose mission is by the Web browser to a Web server on the network requests for services, Web server on the user identity is validated using the HTTP protocol to send the required Home client, the client came to accept the home page file, and put it on display in a Web browser.

The second layer of functional layers: application extension functionality with the Web server
This layer contains the system's transaction processing logic in the Web server side, its task is to accept user's request, first execute the application with the appropriate extension to connect to the database through the SQL database server, to the presentation of data processing applications, and other database server data processing results to the Web server, and then sent by the Web server to the client.

The third layer of data layers: the database server
This layer contains the system's data processing logic in the database server, Web server whose task is to accept requests for database operations, realization of a database query, modify, update and other functions, responsible for running the results submitted to the Web server.

Since the system has strong professional and specificity, the development could be considered: the client does not require too large, as long as meet the requirements of the browser can be a simple operation of the system, while the application server and database server each effective integration, which can greatly reduce the system code debugging, and system data to improve maintenance, updating more difficult.


1.2 System framework composed of
The structural model analysis of the system, CNC machine tools for shop floor management system using object-oriented modeling design ideas, detailed analysis of equipment, failure, production tasks and other practical issues, and application layer as the basis for the solution of specific operational and implement its system framework design shown in Figure 1.2.


System is divided into three layers: user layer, application layer and data layer. Their role described as follows:

(1) user-level

Individual users through Internet / Intranet network login systems, and follow the application layer network protocol for the operation and control system interface will be user level service requests into the data stream sent to the application layer for processing.


(2) application layer

System home page can be set to the main overview of the system, information exchange, system registry and other menu. Login operating system functions can be divided into resource management items, equipment failure information management, scheduling fault management, system access management. Links to Papers download http://www.hi138.com resource management including accounting devices to add, query, purchase, scrap and spare parts storage, a library, cold storage and other functions; equipment failure information management, including failure to repair the machine, check , diagnosis, fault knowledge base to add, query, display, fault instance, rule storage failure, fault history, statistical analysis etc.; failure mainly by the dispatch schedule management data management, static scheduling and dynamic scheduling of three functional modules, data scheduling management is the basic information management, such as manufacturing processes, materials, supplies, generate work orders, order evaluation, static scheduling is not considered in the case of equipment failure the resource scheduling decisions, dynamic scheduling is to consider the case of equipment failure the resource scheduling decisions ; rights management system will include user data management, system user rights management.


(3) Data Layer

System to operate the plant in the process of order information, equipment failure information, processing and billing information, equipment, accounting information, and user information into the data, written to the database, and the preservation and management.


Conclusion

Advanced manufacturing in Europe and America countries, according to statistical data analysis, the use of CNC machine tools, and equipment of good quality management experience in the premise, after the failure of the machine time required to rule out the parts about 9% of the processing cycle, resulting in imperfect production organization and management the processing time to be about 11%, adding that both the shutdown and Daigong time a total of 20%.


In China, CNC machining and other advanced manufacturing technology is still an emerging field, the level of organization and management of production and use far less experience in Europe and the United States and other advanced manufacturing industries, most organizations still follow the traditional mode of production, our data show that in this production management mode due to downtime and Daigong time, serious and sometimes reach 95% of the product cycle, even in the case of strengthening the management, production of machine utilization is only about 50%.


For processing and manufacturing of CNC status, in many companies a lot of visits and research, based on, while summing up the successful implementation of domestic and foreign manufacturers of plant management experience, this paper general manufacturing shop floor production management needs, from management of CNC machine tools, machine fault information management, shop scheduling management, and customer delivery requirements in a bid to make the CNC machine shop management system structure model and overall framework, the next step for the system implementation and development prepared, reflecting the feasibility and rationality of system development.



References
[1] Wang HJ, ZHOU Zhi-feng. CNC machine maintenance and fault analysis software, research and development, Beijing Institute of Machinery, 2001,16 (4) Links to free download http://www.hi138.com