On digital design and manufacturing environment and application-oriented curriculum is set to explore practical training

Abstract A digital product development Technology involved in the cell Technology, automation and mechanical design and manufacture of professional development programs and related courses in organic combination, and to develop new digital products, main line, strengthen the comprehensive training session, the establishment of suitable for the digital design and manufacturing environment, the new training model.

Keywords digital design and manufacturing personnel training curriculum

1 digital product development Technology has become indispensable to modern manufacturing techniques
Manufacturing industry is a pillar industry of the country, manufacturing a direct reflection of the level of development of national economic and technological level of development. To information Technology-driven rapid development of modern science and Technology, promote the manufacturing and product development of digital technology's rapid development , the traditional manufacturing industry is facing great challenges.

The traditional serial product development process to design patterns, from product design, prototype to improved re-trial production, lead to new product development cycle is longer, the lack of market competitiveness. And then with the help of modern manufacturing technology for digital product development, from design, manufacturing the entire process of parallel design patterns, as much as possible the use of digital three-dimensional data model to replace the original physical prototypes, thus shortening the new product development cycles, faster time to market.

2 traditional teaching model and related curriculum in need of reform
Many colleges and universities in mechanical Engineering technology for digital product development series there are more problems, mainly in: the traditional teaching model based on the original design and manufacturing process of conventional mechanical main line, re-setting of curriculum theory and practice of light, the cell technology and there is a big disconnect between the overlap, did not form a complete curriculum.

Digital design and manufacturing environment of the modern manufacturing sector is gradually spread to three-dimensional CAD technology as the core of the digital product development model, which will then require the talents of Mechanical Engineering training objectives, curriculum system corresponding in the basis of full investigation on the proposed curriculum will be adjusted to the original: "the overall quality of training as the core, Innovation and education as the main line to digital product development technology as a means to broaden the base and to strengthen capacity-building in Engineering practice."
3 digital product development technology involves the main content
Digital product development technology integrates modern design and manufacturing process related to advanced technology, can be divided into: digital design, digital manufacturing, digital management of three major modules, each module involved in cell technology shown in Figure 1.


Figure 1 digital design technology-related units
The above cell technology throughout the product design, analysis, manufacturing, use of the whole process is a multidisciplinary technology to three-dimensional CAD / CAE / CAM as the core of digital product development technology has become indispensable for new product development modern technological means.

4 digital design and manufacturing environment, the curriculum set
Machine Design and Manufacturing Engineering and Automation is Application-oriented professional, the type of talent into applied research and technology applied. Technical talents are mainly Application of knowledge rather than scientific discovery, the knowledge structure should focus on the practical needs of modern manufacturing set expand the base, focusing on practice in a number of manufacturing enterprises in Chongqing (state, private, large, medium and small on the basis of extensive research (involving automobile manufacturers, auto parts companies, motorcycle manufacturers, equipment manufacturing, and other institutions of higher learning in this country with reference to the professional development program, combined with the actual situation of our school, the professional direction of the training objectives of high-quality Application-oriented high-level expertise.

4.1 Mechanical Design, Manufacturing and Automation curriculum
Mechanical Engineering and Automation curriculum setting, should be based on the "Mechanical Design Technology", "Machinery Manufacturing Technology" and "mechanical and electrical system integration technology," the three major platforms, and digital design and manufacturing technology for the feature, focusing on to develop students ability to apply technology to strengthen the integrated practice and engineering training courses mechanical design and manufacturing and automation system block diagram shown in Figure 2.


Figure 2 Mechanical Engineering and Automation curriculum diagram
The entire curriculum by the teaching the theory, practice and practice and other extra-curricular social activities constitute the three parts, according to the course of which the nature of teaching the theory can be divided into: basic course, discipline-based courses, main courses and professional direction of professional electives and other four categories ( Figure 2 lists only a small part of the course.

4.2 reflects the digital design and technical features of the practical aspects of manufacturing
As can be seen from the curriculum, integrated across the curriculum practical aspect plays a very important position, Figure 3 is involved in the practical aspects of the main content, can be seen, digital design and manufacturing technology in the entire practice session prominent prominent position, and four non-stop. Links to free download http://www.hi138.com
Opened in the freshman year, "Engineering Graphics Course Practice," "Computer-aided drawing (two-dimensional" training, students are asked to use AutoCAD software to complete the mapping reducer, so that students get the most basic digital design basic training, in the " metalworking practice "session, in addition to turning, milling, grinding, fitter and casting, welding and other conventional processing methods, the emphasis on CNC machine tools, machining centers, EDM and other equipment used in digital manufacturing methods brought to the traditional manufacturing to great changes.

In the sophomore year to open the "three-dimensional CAD Application training" integrated digital design and practice is the core manufacturing technology, the most basic part, through high-end 3D CAD \ CAE \ CAM integration software - UG NX5 learning, students should have solid modeling, surface design, sheet metal design, assembly, engineering drawings and other modules, to lay a solid foundation for the subsequent link in the "Machine Design" course design sessions, in addition to completing the gear reducer mechanical drive as the main general device design process, but also require students to complete the reducer 3D modeling, virtual assembly and simple kinematic analysis; in "electronic technology practice," in addition to completing the assembly of the radio outside of debugging, also asked the students to use "protel schematic drawing software "to complete the entire radio circuit.


Figure 3 focus areas of professional practice
Opened in the juniors, "Manufacturing Technology-based curriculum design", in addition to other conventional content, while requiring students to use part of the CAPP software to complete the preparation of Computer-aided process planning, and three-dimensional CAD software to build a top-down assembly modeling methods to complete the entire three-dimensional fixture design, "Computer-aided manufacturing training" comprehensive practice session, requires students to master CNC automatic programming principles, methods, and skilled use of UG NX5 CAM software modules, complete with a moderately complex shaped surface parts of the automatic programming of CNC milling, and the actual processing operation in the "Computer-aided engineering analysis" comprehensive training session, requires students to master the basic principles of finite element analysis, methods, and basic grasp of the virtual machine using ADAMS software system statics, kinematics and dynamics analysis.

In the senior year to open the "reverse engineering, comprehensive training," compared with other practice areas, the scope and comprehensive is even more prominent, from conceptual design to the renderings, clay modeling to coordinate scanning, point cloud data processing to surface design and solid modeling, rapid prototyping, through the training session, to strengthen the students in the digital design and manufacturing environment for rapid development of new products, the implementation process in the "product data management integrated training" practice session, requires students to master digital technology in the areas of management, and skilled use of domestic CAXA V5 PDM software to use in the curriculum, based on different characteristics of professional direction to set the corresponding "professional training session." such as in mold design and manufacture of direction, their professional training session is "injection mold CAD / CAE / CAM" comprehensive training, the main learning UG NX5 software MoldWizard injection mold design module, and the use of Moldflow flow analysis module, part of the graduation project, If the subject of engineering design graduate design type requires a certain amount of work students must complete the three-dimensional design.

5 Application of the last three years of exploration and practice-based training
Past three years, School of Mechanical Engineering at the emphasis on theoretical aspects of teaching practice, while strengthening the ability of students, the overall quality of students has been significantly improved. And actively organize students to participate in a variety of national and academic competition in Chongqing, such as: In the second session of the National Machinery innovative design won the third prize in a contest, the third National Collegiate advanced mapping technology and product information modeling Innovation Contest won the second prize of four individual, the first national comprehensive university engineering training capacity of Chongqing Division contest third prize two, three-dimensional digital 2009 National Innovation Design Contest (referred to as 3D Competition second prize of Chongqing Division two other good results. At the same time, the Institute information as a national manufacturing base for three-dimensional CAD education and training, training of students in the past three years, $ 5 person.


References
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[2] Liu Yan, Luo disciplines of Mechanical Engineering and Automation undergraduate education to explore multi-level training model [J]. Coal, higher education, 2008.1.

[3] Xiong Zhiqing. Mechanical engineering application-oriented training program of reform and practice. Nanjing Institute of Technology (Social Science, 2007.9.

[4] the first king of all, Yuhua. Mechanical 3D design professionals to develop the research capacity of Anhui University of Technology (Social Science, 2007.5. Links to free download http://www.hi138.com
[5] Liu Yingchun, Ning Liwei, Tang Yi, etc. mechanical design and manufacture of application-oriented training courses and automation system for the study [J]. Hunan Institute of Engineering, 2004.3.

Links to free download http://www.hi138.com