The five-axis turning and milling technology is typical of multi-axis machining technology. The five-axis turning and milling center is the carrier of five-axis turning and milling technology. It refers to a turning function and integrates functions such as milling and boring, at least three. A linear machine feed axis and two circumferential feed axes, and a machine name with an automatic tool change system. This kind of turning and milling combined machining center is developed on the basis of the three-axis turning center. It is equivalent to the combination of a turning center and a machining center. It is a composite processing technology developed in the 1990s. It is a kind of Based on traditional mechanical design technology and precision manufacturing technology, it integrates advanced advanced control technology, precision measurement technology and advanced machining technology of CAD/CAM application technology. The advanced nature of the five-axis turning and milling center is reflected in its design concept. In the usual machining concept, the machining of a part is as small as one or two steps, and there are hundreds of processes. It is necessary to complete the processing of multiple equipments, and prepare tools and fixtures. For complex parts, it takes three to five months to prepare a set of tooling. Even if economic costs are not considered, three or five months are likely to miss many commodity opportunities and strategic opportunities. Titanium Machinery is the main product of the company with rotary top, screw, shaft machining, CNC lathe machining, shank shank and collet post. In the mass production industries such as automobiles and home appliances, in order to improve the efficiency and automation level, automated production lines are widely used. The huge logistics system constitutes a very important part of the automatic line. At the same time, it is a part of the money and land occupation, and it is also a part of faults. For the processing of complex shapes, logistics is a big problem. Multiple clamping and benchmarking of parts sometimes leads to unnecessary processes and also results in lost machining accuracy. The five-axis turning and milling combined machining center solves this problem from the design concept. It is a single clamping, completes all or most of the processing within the processing range, and realizes a leap from composite processing to complete processing. The five-axis turning and milling combined machining center has been in existence for nearly 20 years, and the technology has matured and received and recognized by domestic and foreign users. From the trend point of view, it mainly develops in the following directions: 1. Higher process range. More process integration is achieved by adding special function modules. For example, gear machining, internal and external grinding, deep hole machining, cavity machining, laser quenching, on-line measurement and other functions are integrated into the turning and milling center to truly complete the complete processing of all complex parts. 2, higher efficiency. Through the configuration of dual power head, dual spindle, double tool holder and other functions, multi-knife simultaneous processing can be realized to improve processing efficiency. 3. Large size. Since large parts are generally complex parts, require more parts and processes, and are more time-consuming and troublesome to install and position, one of the main advantages of turning and milling combined machining is to reduce parts in multi-process and multi-process processing. The adjustment and clamping time are re-installed many times, so it is advantageous to use the turning and milling center for composite machining. Therefore, the current five-axis turning and milling composite machining center is developing in a large-scale manner. For example, the HTM125 series five-axis turning and milling center of Shenyang Machine Tool has a turning diameter of 1250mm and a machining length of 10000mm, which is very suitable for turning and milling of large marine diesel engine crankshafts. 4, structural modularity and function can be quickly reorganized The rapid reorganization of the five-axis turning and milling center is an important condition for its rapid response to market demands and the ability to seize the market. The modular structure is the basis for the rapid reorganization of the five-axis turning and milling center. Many of the products of some of the most advanced manufacturers have achieved structural modular design and are working hard on how to achieve rapid reorganization of functions. The advanced concept of five-axis turning and milling technology is to improve product quality and shorten product manufacturing cycle. Therefore, this technology has considerable advantages in military, aerospace, aerospace, marine and some civil industrial fields, especially in the processing of some complex shaped parts in the aerospace industry. Therefore, foreign countries have already been in aerospace. A large number of such equipment have been used in the field to replace traditional processing equipment, and the domestic industry is relatively backward in this respect. Therefore, it is necessary to learn from the advanced experience of foreign countries and strive to change the backward situation in the application field of five-axis turning and milling technology.