Mold CAD/CAM is developed on the basis of the development of mold CAD and mold CAM respectively. It is a new leap in the comprehensive application of computer technology in mold production. Mold CAD/CAM is the key technology to transform the traditional mold production method, and it is a high-tech, high-efficiency system type. It provides users with an effective auxiliary tool in the form of computer software, enabling the skilled workers to design and optimize products, mold structures, forming processes, CNC machining and costs by means of computers. The rapid development of technology, software and hardware level of mold CAD/CAE has provided strong technical support for the mold industry, which has brought a qualitative leap to the development of product design, manufacturing and production level. The optimal choice of modern enterprise informationization, integration and network. I. Overview of the development of mold CAD/CAM The development of mold CAD/CAM is in line with the development of general CAD/CAM software. The current development status of general CAD/CAM software is as follows: CAD technology has experienced two-dimensional graphic design, interactive graphic design, three-dimensional wireframe model design, three-dimensional solid modeling design, free-form surface modeling design, parametric design, feature modeling design, etc. development process. In recent years, many advanced technologies have emerged, such as variable technology and virtual product modeling technology. With the popularity of the Internet, intelligent, collaborative, and integrated technologies have become the new development features of the technology, enabling the wider application of CAD technology to support collaborative design, off-site design, and information sharing. Network CAD. (4) With the improvement of computer simulation technology in plastic forming process, the CAD/CAM/CAE integration technology of mold can greatly increase the reliability of the mold, reduce the need to try the mold repair process, and improve the success rate of mold design and manufacturing. . Fourth, the reason why the mold industry uses mold CAD / CAM technology Traditional mold design and manufacturing methods cannot meet the requirements of rapid upgrading and quality improvement of industrial products. Therefore, domestic and foreign companies have adopted mold CAD/CAM technology. The main reasons for the mold industry to adopt mold CAD/CAM technology are: (1) Geometric models obtained by geometric modeling techniques can be used for subsequent design analysis and numerical control programming. (2) The trial cycle of new products can be shortened. For example, in the automotive industry, the design and manufacturing cycle of the mold can be shortened. (3) The need to improve product quality, such as the shape of the car body surface, requires the use of a computer to prepare data and complete subsequent manufacturing work. (4) The need for CAD/CAM by mold manufacturers and users has increased. For example, using a disk for data transfer, the user requires the mold manufacturing unit to exchange information and process the data. (5) The efficiency of mold processing equipment is constantly increasing, and computer-aided processing data is required to improve equipment utilization. (6) Establish an information processing system that connects each department in the enterprise. V. Application status of mold CAD/CAM technology in the model industry Mold CAD/CAM technology is developing rapidly. The scope of application is expanding. There are successful CAD/CAM systems in die, forging die, extrusion die, injection die and die-casting die. The use of CAD/CAM technology is a measure of mold technology and production innovation, and is a remarkable feature of the development of mold technology. At present, the mold CAD/CAM software applied in China's mold industry can be divided into two categories: one is the CAD/CAM commonly used in the machinery industry, such as Unigraphics (UG), SOLIDEDGE, AutoCAD, SolidWorks, Pro/Engneer, etc. introduced above. The second is the mold CAD/CAM system developed specifically for the mold industry, such as the cold die CAD system developed by Shanghai Jiaotong University Die CAD National Engineering Center. (1) Application status of foreign mold CAD/CAM technology Large mold manufacturers in industrialized countries have made large investments in CAD/CAM and are vigorously developing this technology. At present, the application of CAD / CAM technology is more common in the United States, Japan, Germany and other countries. For example, Toyota Motor Corporation of Japan used CNC in mold processing in 1965. The cover die CAD/CAM system was introduced in the early 1980s. The system includes NTDFB and CADEIT software for designing covers and TINCA software for machining convex and female dies. The clay model was measured using a coordinate measuring machine and the data was sent to a computer. After the resulting pattern is smoothed, the data is used for the design of the cover, the design and manufacture of the die. The system has a strong three-dimensional graphics function, which can repeatedly modify the shape of the surface on the screen, so that the workpiece does not cause process defects during stamping, thus ensuring the quality of the mold and the workpiece. The model of the mold profile is stored in the database, and the TINCA software can use these data to perform CNC machining of the mold profile. (2) Application status of domestic mold CAD/CAM technology After several decades of development, CAD/CAM technology has been widely used in domestic mold production. The mold industry has introduced a considerable number of foreign CAD/CAE systems, such as: Unigraphics (UG), SOLIDEDGE, AutoCAD, SolidWorks, Pro/Engineer, etc. It is equipped with a computer that runs fast and has high performance. However, for some large domestic mold enterprises, their CAD/CAM application status mostly stays in the purchase of advanced CAD/CAM systems and equipment from abroad, but the secondary development on them is less, and the resource utilization rate is low; Small and medium-sized mold companies have few CAD/CAM applications, and some only stay in the computer instead of drawing board. Therefore, it is necessary to improve the CAD/CAM application status of domestic mold enterprises, so that they can truly respond to the market quickly and accurately, and make the quality of the manufactured mold products high and low cost, that is, achieve the purpose of agile manufacturing. Sixth, China's mold CAD / CAM software independent development and secondary development The development of China's mold CAD/CAE began in the late 1970s, and its development is also very rapid. In the development of CAD/CAM software on the microcomputer platform, China and foreign countries have similar starting points. They use Visual C++, OpenGL and other tools for software development. Many universities, software companies and enterprises in China have developed advanced and unique features. CAD/CAE software or modules that are in line with Chinese users' habits, some of which have been promoted and used. Domestic development of CAD/CAM software suitable for the mold industry, mainly using two ways - on the existing CAD / CAM platform for secondary development and development of CAD / CAM system with independent copyright. (1) Based on the secondary development results of the existing mold CAD/CAM platform Huazhong University of Science and Technology in 1997 introduced the HSC2.0 injection mold CAD/CAE/CAM integrated system. The HSC2.0 system uses the AUTOCAD software package as the graphic support platform, including the mold structure design subsystem, the structure and process parameters are calculated compared to the nuclear subsystem, and the plastic flow , cooling and other subsystems. Hefei University of Technology based on AUTOCAD and MDT three-dimensional parametric injection mold system IPMCADV4.0. (2) Self-developed CAD/CAM system with independent copyright The 3D electronic board and CAXA-ME manufacturing engineer 2000, which was launched by Beijing Beihanger Software Co., Ltd., can perform 3D part design and NC processing. It is characterized by 3D parametric feature design, which realizes solid, curved and NC machining. Coordination and unity. The three-dimensional finite element simulation system for metal plastic forming developed by Shanghai Modao University has reached the international advanced level with its rigid (viscous) plastic finite element analyzer and dynamic boundary processing technology. The CAD/CAE/CAM integrated system of stamping die developed by Jilin Gold Grid Mold Engineering Research Center. Zhejiang Dayan Electronic Information Engineering Co., Ltd. developed a feature-based parametric modeling system GS-CAD98. The Lonicera system is a CAD/CAM system based on the STEP standard developed by Guangzhou Red Land Technology Co., Ltd. Kaimu CAD is a CAD and drawing management software based on a microcomputer platform developed by Huazhong University of Science and Technology. The CASA Software Group of the Chinese Academy of Sciences and Beijing Kaisi Bohong Application Engineering Company have developed the PICAD system and series software with independent copyright. These softwares have been promoted and applied in companies in many mold industries. 7. Major shortcomings in the application and development of China's mold CAD/CAM software In recent years, the development and application of CAD/CAM systems in China have achieved some results, and the CAD/CAM commercialization software market has been initially formed in China. The main disadvantages of CAD/CAM software application and development are as follows: (l) A lot of enterprises' understanding of CAD is still only in the drawing stage, lacking the guidance of design methods and design theory, so that the benefits generated by CAD have not been fully utilized. (2) The application level of CAD/CAM software is not uniform, and the high-efficiency application of CAD software cannot be obtained. (3) There is a blind tendency in the introduction of mold CAD/CAM technology. Many companies do not fully consider the characteristics of various CAD/CAM software. The purchased CAD/CAM software cannot be fully applied to the product design and development of the enterprise. . (4) The secondary development of the imported mold CAD/CAE system could not keep up, and the efficiency of introducing software could not be fully realized. (5) The level of domestic mold CAD/CAM technology is still in the period of high-tech integration and transition to industrialization and commercialization. The self-developed mold CAD/CAM system is not commercialized to a high degree, and its function and stability are related to foreign advanced software. A big gap. (6) China's CAD technology development has less innovation and more imitation. Without innovation, there is no competition, and only imitation can not develop competitive products. This problem exists from 2D CAD in China to 3D CAD currently developed. (7) The development of CAD software in China lacks theoretical and algorithmic research. CAD technology is a comprehensive high-tech, involving a wide range of complex, rapid technological changes and fierce competition. (8) Information integration technology is backward. The extensive integration of information technology is based on product data management (PDM) and process management (PM), which realizes the organic integration of CAD/CAPP/CAM and ERP. PDM is also an important foundation in concurrent engineering. Therefore, such basic software has also occupied the market by foreign systems. And our CAD/CAPP/CAM integration technology is built on foreign base systems. Eight, conclusion In the application of mold CAD/CAM, the application of mold CAD/CAM in China has made great progress, and the CAD/CAM technology of mold has been widely used in Chinese enterprises. However, in general, China's current mold industry using CAD / CAM technology still has many drawbacks, mold CAD / CAM technology level is still in the period of high-tech integration and industrialization commercialization, the self-developed mold CAD / CAM software The level of development, commodification, and marketization are not as good as those of developed countries. There are still some gaps in the reliability and stability of software with software from developed industrial countries. Second, the characteristics of mold CAD / CAM A stable CAD/CAM system that meets the needs of actual production design should have the following characteristics: (l) The mold CAD/CAM system must have the ability to describe the geometry of the object. In the mold design, the working parts of the mold (such as the drawing die, the forging die and the cavity of the injection mold) are designed according to the shape of the product parts. So no matter what type of mold is designed, the geometry of the product part must be provided at the beginning. Otherwise, the geometric information about the product parts cannot be entered and the design program will not run. In addition, in order to program the NC machining program and calculate the tool path, it is also necessary to establish a geometric model of the mold part. Therefore, geometric modeling is an important issue in mold CAD/CAM. (2) Standardization is a necessary condition for realizing mold CAD. Mold design is generally not unique. In order to facilitate the realization of mold CAD and reduce the amount of data storage, the first problem to be solved when establishing the mold CAD system is the standardization problem, including the standardization of design criteria, the standardization of mold parts and mold structure. With a standardized mold structure, a typical mold combination can be used when designing a mold, and standard mold parts are called. Only a few working parts need to be designed. (3) The processing of design criteria is an important issue in mold CAD. The design criteria by which the mold is manually designed are mostly given in the form of numbers and line graphs. Third, the advantages of mold CAD / CAM The interaction between the computer and the designer is conducive to the use of the individual strengths of the human machine and the rationalization of the mold design and manufacturing process. The optimized design method used in the system contributes to the optimization of certain process parameters and mold structures. (1) CAD/CAM saves time and increases productivity. Automation of design calculations and pattern drawing greatly reduces design time. The integration of CAD and CAM can significantly shorten the cycle from design to manufacturing. (2) CAD/CAM can greatly reduce costs. The high-speed computing and automatic drawing of the computer saves labor. Optimized design brings savings in raw materials. For example, optimized blanking of stamped parts can increase material utilization by 5%-7%. The use of CAM can process complex mold profiles that are difficult to machine by conventional methods, which can reduce the processing and commissioning time of the mold and reduce the manufacturing cost. The economic benefits of CAD/CAM are somewhat estimable and some are difficult to estimate. Due to the adoption of CAD/CAM technology, the production preparation time is shortened, and the product replacement is accelerated, which greatly enhances the market competitiveness of the product. White Primer Door,High Quality White Primer Door,White Primer Door Details, Zhejiang Jihengkang (JHK) Door Industry Co., Ltd. JiHengKang (JHK) Door Industry Co.,LTD , http://www.zjwoodendoors.com
(3) CAE/CAM technology frees technicians from tedious calculations, drawings, and NC programming to enable them to engage in more creative work.