CNC technology and equipment development trends and countermeasures (2)

1.2 5-axis simultaneous machining and rapid processing of machine tools

The 5-axis joint machining of the 3D curved parts can be performed with the best geometry of the tool, which not only has a high finish, but also greatly improves the efficiency. It is generally believed that the efficiency of a 5-axis linkage machine can be equal to two 3-axis linkage machines. Especially when using high-hardness milling cutters such as cubic boron nitride for high-speed milling of hardened steel parts, 5-axis linkage machining can be linked with 3 axes. Processing has a higher efficiency. However, in the past, due to the 5-axis linkage CNC system and the complicated structure of the mainframe, the price is several times higher than that of the 3-axis linkage CNC machine tool. In addition, the programming technique is difficult, which restricts the development of the 5-axis linkage machine tool.

At present, due to the emergence of the electric spindle, the structure of the composite spindle head for 5-axis simultaneous machining is greatly simplified, the manufacturing difficulty and cost are greatly reduced, and the price gap of the numerical control system is narrowed. Therefore, the development of the composite spindle head type 5-axis linkage machine tool and the composite machining machine tool (including the 5-face machining machine tool) has been promoted.

At EMO2001, the 5-day machining machine of Nippon Machine Co., Ltd. uses a composite spindle head to realize four vertical plane machining and machining at any angle, so that 5-sided machining and 5-axis machining can be realized on the same machine. Machining of inclined faces and inverted tapered holes is possible. DMG of Germany exhibited the DMUVoution series of machining centers, which can be processed in 5 sides and 5 axes in one setup, and can be controlled directly or indirectly by CNC system control or CAD/CAM.

1.3 Intelligent, open and networked has become the main trend of the development of contemporary CNC systems

The 21st century CNC equipment will be a certain intelligent system. The intelligent content includes all aspects in the CNC system: for the pursuit of processing efficiency and processing quality, such as adaptive control of the process, automatic process parameters Generated; intelligent to improve drive performance and convenient connection, such as feedforward control, adaptive calculation of motor parameters, automatic identification of load automatic selection model, self-tuning, etc.; simplify programming, simplify operation, intelligent, such as intelligence Automatic programming, intelligent human-machine interface, etc.; as well as intelligent diagnosis, intelligent monitoring, and convenient system diagnosis and maintenance.

In order to solve the problems of the traditional CNC system closure and the industrial production of CNC application software. At present, many countries have researched open CNC systems, such as NGC (The Next Generation Work-Station/Machine Control), OSACA (Open System Architecture for Control with In Automation Systems), Japan's OSEC (Open System Environment for Controller), and China's ONC (OpenNumerical Control System). The openness of CNC systems has become the future of CNC systems. The so-called open CNC system is the development of the CNC system. On the unified operation platform, it can be used for machine tool manufacturers and end users. By changing, adding or cutting structural objects (numerical control functions), serialization can be formed, and the user's special can be conveniently The application and technology are integrated into the control system to quickly realize the open CNC system of different varieties and grades, forming a brand-name product with distinctive personality.

At present, the architecture specification, communication specification, configuration specification, operation platform, numerical control system function library and numerical control system function software development tools of the open CNC system are the core of the current research.

Networked CNC equipment is a new highlight of the internationally renowned machine tool fair in the past two years. The network of CNC equipment will greatly meet the demand for information integration in production lines, manufacturing systems, and manufacturing enterprises. It is also the basic unit for implementing new manufacturing models such as agile manufacturing, virtual enterprise, and global manufacturing. Some well-known CNC machine tools and CNC system manufacturing companies have introduced new concepts and prototypes in the past two years, such as the "CyberProductionCenter" exhibited by Mazak in Japan at EMO2001. Control Center (CPC); Okuma Machine Tool Company exhibited "ITplaza" (Information Technology Plaza, IT Square for short); OpenManufacturingEnvironment (OME), exhibited by Siemens, Germany, etc. The trend of CNC machine tool processing to network development.

1.4 Pay attention to the establishment of new technical standards and norms

1.4.1 About CNC system design and development specifications

As mentioned above, open CNC systems have better versatility, flexibility, adaptability, and scalability. The United States, the European Community, and Japan have implemented strategic development plans and implemented open architecture CNC system specifications (OMAC). , OSACA, OSEC) research and development, the world's three largest economies in the short term carried out almost the same scientific plan and norms, indicating a new era of change in CNC technology. In 2000, China began to study and formulate the normative framework of China's ONC numerical control system.

Previous page next page

Ductile Iron Spindle Assembly

Ductile Spindle Assembly is a crucial part for your lawn mower cutting deck that work together with the pulleys and belts to perform clean and even mowing.