In recent years, CAD is the protagonist of CAD/CAM integrated system technology innovation. In contrast, the CAM field shows an undue silence. However, with the increasing demand for information technology, enterprises are also eagerly awaiting CAM, hoping that the wind of technological innovation can be blown into the CAM field, and there is a powerful, more conforming to the concept of processing engineering and easy to popularize. A new generation of CAM products.
As an important level of the whole integrated system, CAM integrates seamlessly with CAD and CAPP, and provides convenient, fast, intelligent and efficient services for CNC production. This is the theme that CAM technology will never change. The new concept of object-oriented and process-oriented features has been echoed with object-oriented design and feature modeling in CAD technology. It has been successfully applied in some specialized CAM systems, and it is necessary for the birth of a new generation of CAM. Experience accumulation, technical reserve and mental preparation. The contradiction between the difficulty of learning, mastering and application of CAM and the urgent requirement of rapid development of CAM talents has become increasingly prominent, providing a market foundation for the maturity and development of a new generation of CAM. New technologies and new processes such as high-speed machining technologies that are constantly emerging in the manufacturing industry have also placed higher demands on CAM technology. The development of network technology makes CAD/CAPP/CAM/cae/pdm integrated system free from the constraints of space, and can better adapt to the production layout and production management requirements of modern enterprises. In order to meet the requirements of the integrated system, the structural system and functional composition of CAM will inevitably change accordingly. Therefore, we have reason to believe that the new generation of CAM technology is in the process of gestation, development and maturity, and a new generation of CAM will emerge in the near future. 
The following is an analysis of the development process of CAM technology, the application status of CAM, and the requirements of new technology for CAM, and then make a subjective prediction on the development trend of CAM. And make a bold idea for the structure of the new generation CAM system, hoping to benefit the research, selection and application of CAM in China, and hope to communicate with the vast number of peers. 
First, the inevitability and development trend of the new generation of CAM technology CAM technology has developed to the present, no matter in the software and hardware platforms, system structure, functional characteristics have undergone earth-shaking changes. There are also huge differences in the functionality of today's popular CAM systems. In terms of its decisive basic treatment methods and target objects, it can be divided into two main development stages, which can be considered as two generations of products. 
The first generation of CAM: apt
In the 1960s, the programming machine and some programming software developed on the professional system, such as: fanoc, seemms programming machine, the system structure is a special machine form, the basic processing method is manual or auxiliary direct calculation of CNC tool path, programming goals and objects are also It is directly a CNC tool path. The features are poor function, difficult operation, and dedicated to the special plane. 
Second Generation CAM: Surface CAM System
The system structure is generally a CAD/CAM hybrid system. The CAD model is better utilized, and the geometric information is used as the final result to automatically generate the machining path. The degree of automation and intelligence has been greatly improved, and representative ones are UG, duct, cimatron, marsterCAM and so on. The basic feature is the processing method for the local surface, which shows that the difficulty of programming is directly related to the complexity of the part, but not directly related to the process characteristics of the product and the complexity of the process. Although the time span of this period spans 20 years, the system grades vary greatly, and the level of intelligence is different, but there is no qualitative change in the structural system. The author believes that it should belong to the same generation of products. 
Looking at the development of CAM technology, we can draw the following conclusions:
1. The development of CAM is a process of continuously absorbing and utilizing the application results of CAD and peripheral related technologies, and the process of continuous development; it is the process of continuously improving the level of automation and intelligence; it is the CAM system structure and basic processing methods that are constantly adapting to the engineering concept. The direction of the process of development. 
2. The basic processing method of the system, that is, the target object of programming plays a decisive role in the structure and intelligent level of the system. In the apt era, the CAM system directly calculates the toolpath trajectory from the programmed target object. The second-generation CAM system automatically generates a tool path by using the CAD model as the target object for programming. Therefore, the automation and intelligence level of the system has been greatly improved, and the operation of the system is more in line with the engineering concept. 
3. The basic processing form of the second generation CAM system with the local geometric features of the CAD model as the target object has become the limiting factor for the further development of intelligence and automation. Only by breaking through the inherent mode of today and developing a new generation of CAM systems: model-oriented, process-oriented CAM systems can raise the level of automation and intelligence of CAM to a new level. 
4. It can be foreseen that the new generation CAM system that is gestating, maturing and developing will adopt the object-oriented and process-oriented basic processing methods, which will greatly improve the automation level and intelligence of the system. The system structure will exist independently of CAD and CAPP systems, leaving room for the development of CAPP, and more in line with the requirements of network integration.
Second, the direction of CAM innovation
As a practical and practical professional technology, CAM is directly oriented to the actual production of CNC. The actual demand for production is the driving force behind all technological developments and innovations. Analyze and summarize the current application status of CAM, the gap between production requirements and its causes, the special needs of new technologies and new technologies for CAM, and the development and requirements of related peripheral technologies, which will help to better understand the future development trend of CAM. . 
1. The application status of CAM and the gap between actual application and actual demand Because the application is more practical and the division of specialization is more clear, on the whole, the professional level of CAM is higher than the development of CAD. Looking at today's dominant CAM system, regardless of its interface quality and strength, there are common defects. 
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