(1) System structure system of CAD/CAM hybridization Previous page next page Complex Fertilizer,Humizone Npk Complex Fertilizer ,Compond Fertilizer Lower Blood Pressure Co., Ltd. , http://www.bjorganicfertilizer.com
The CAD function is used interchangeably with the CAM function. It is not a programming form for the overall model. The process features need to be manually extracted or further processed by CAD. The formation of this structural system is a product of history. Many years ago, the concept of integrated systems, especially networked integration, has not become the main idea of ​​system development. The establishment and programming of models are done by the same operator at the same place. This will cause the following problems. 
1) It is not suitable for the requirements of today's integration. The module distribution and function focus of the system must match the organization form and production layout of the enterprise. System hybridization is not equal to integration, which is not conducive to the realization of network integration. 
2) It is not suitable for the requirements of modern enterprise specialization division  Hybrid system, can not realize the division of labor in design and processing, increase the difficulty of production management and division of labor, and greatly hinder the improvement of intelligence and automation. In addition, the hybrid system requires the operator to have a solid background and experience in both CAD and CAM to complete the work well, increasing the difficulty of learning to master and use the system. It usually takes 1 to 3 years of practice to become a competent CAM operator, which has a great negative impact on the management of corporate talent. 
3) No space and possibility for the development of CAPP. As we all know, CAPP is a bridge for CAD/CAM integration integration. The CAD/CAPP/CAM hybrid system determines that it is never possible to realize the intelligence and automation of CAM. Because of the low standardization of the production process, influenced by production equipment, tools, management and other factors, there is no mature commercial CAPP system with the creation method or the derivative method as the reasoning mechanism. CAPP turned to development and research similar to development environment software systems. However, with the successful application of enterprise CAD, CAM and other technologies, the improvement of the process library and knowledge base, CAPP will have corresponding development in the future. Gradually realize the integrated integration of CAD/CAPP/CAM in the scientific sense. The hybrid system is integrated from the structure. The hybrid system leaves irreparable hidden dangers for the future development of the structure. 
(2) Facing the surface and using local processing as the basic processing method
Today's CAM systems are generally curved CAM systems, which are processing methods for local processing, while CNC machining is based on the model and the process is the core of the engineering process. A process-oriented approach to the overall model should be adopted. This way of dealing with non-engineered concepts will certainly cause a series of problems. 
1) The geometric information of the CAD model cannot be effectively utilized, and the process characteristics of the model cannot be automatically extracted. Only manual extraction or even re-simulation calculation can be used to obtain the necessary control information, which undoubtedly increases the cumbersome operation and affects the programming quality. With efficiency. The degree of automation and intelligence of the system is low. 
2) The local machining calculation method relies on manual or semi-automatic imitation overcutting. Because it is not the programming object for the whole model, the system does not fundamentally eliminate the possibility of overcutting, so it is not suitable for high speed machining and other new processes under high speed conditions. Security requirements. 
2. The problem of production organization and management of current CAM application CAD/CAPP/CAM needs to integrate and seamlessly connect on the information flow, but often neglects that the enterprise requires CAD, CAPP and CAM in the application organization and management. The operators and system functions are arranged according to the production layout. The successful application of network technology has laid the foundation for this. The CAM system and operators are far away from the production site, causing undue repetition due to lack of understanding of the site conditions, wasting time, reducing efficiency, and even causing waste. 
The traditional CAM system not only requires the operator to have a deep background in process knowledge, but also requires high CAD application skills. It usually takes 1 to 3 months to get started with specialized training, and 1 to 3 years of practice can become a competent staff. The application of CAM has caused great difficulties, which has caused serious shortage of CAM reserve personnel. As a result, the talent competition is extremely fierce, the production team is unstable, and serious talent management problems are caused. The situation of China's vast state-owned enterprises is even more severe. Therefore, enterprises urgently need a new generation of CAM systems that are easy to learn, easy to use, highly intelligent, and highly professional.
3. Special requirements for CAM in new manufacturing technologies
Undoubtedly, the biggest hot spot of new manufacturing technology in recent years is high-speed processing technology. According to the latest process research, high-speed processing technology can greatly improve product quality, reduce production cost and shorten production cycle by simplifying production processes and processes, reducing subsequent processing workload, improving processing efficiency, and improving surface quality. High-speed machining technology also puts new special requirements on CAM. 
(1) Security requirements
High-speed machining uses small cutting depth, small cutting amount, high feed speed, and the general cutting speed (f value) of characteristic machining is more than 10 times that of traditional machining (f can reach 2000-8000mm/min), under high-speed feed conditions. Once the cut, geometric interference, etc. occur, the consequences will be catastrophic, so the safety requirements are the first. The traditional CAM system relies on manual or semi-automatic anti-cutting treatment, and does not fundamentally eliminate the occurrence of overcutting. There are no security measures based on the operator's care, responsibility and other factors. Therefore, the basic requirements for high-speed machining safety cannot be met. 
(2) Process requirements
High-speed machining requires the smoothness of the tool path, avoids the sharp corner of the tool path (sudden steering of the tool path), avoids empty blade cutting, and reduces the cut-in/cut-out. Therefore, the CAM system is required to have an intelligent analysis processing function based on the residual model. The tool path smoothing processing function, the optimized processing function in accordance with the high-speed machining process, and the feed rate (f-value) optimization processing function (cutting optimization processing). To accommodate high-end CNC systems for high-speed machining equipment, CAM should support the latest nurbs programming technology. 