CNC Lathe Intelligent machine Tool first appeared in Wright (p · K· Wright) and Bourne (D I A S Bourne) The first monograph in the field of intelligent manufacturing research published in 1998, "Intelligent manufacturing" (Manufacturing intelligence). Due to the important role of advanced manufacturing industry, intelligent technology has aroused the attention of various countries. The United States has launched the Intelligent Machining Platform Program (SMPI); European implementation of the "Next Generation production system" research; CNC Lathe Germany launched the "Industry 4.0" plan; China's medium-and long-term scientific and technological development of "digital intelligent manufacturing Technology" put forward the urgent needs, and formulated a corresponding "Thirteen-Five" development planning; In 2006, the Chicago International Manufacturing Technology Fair (IMTS2006), CNC Lathe Japan Mazak Company launched the first named "Intelligent Machine" intelligent machine tool and Japan Okuma Company launched the name of "Thinc" intelligent CNC system, opened the era of intelligent CNC machine tools. Based on the sensor, the intelligent technology of NC machine tool is divided into intelligent sensor, intelligent function, intelligent part, intelligent system and so on, the paper summarizes the intelligent technology, points out the insufficiency, CNC Lathe reveals the development direction and forecasts the future.
The intelligent sensor is composed of machine tools, cutting tools and workpiece parts of CNC machine tool manufacturing system in the process of processing, with the removal of materials, along with a variety of complex physical phenomena, implied a wealth of information. In this dynamic, Non-linear, time-varying and non-deterministic Environment, the perceptual technology of NC machine Tools is the basic condition of realizing intelligence. To realize the intelligence of NC machine tool, we need various sensors to collect external environment and internal state information, which is similar to the function of perceiving environment change in human facial features, CNC Lathe as shown in table 1. For people, the eyes are the most important sensory organs, can obtain more than 90% of the environmental information, but the visual sensor in the NC machine tool application is relatively few. With the improvement of automation and intelligent level, visual function will play more and more important role in NC machine tool.
With the development of MEMS (micro-electro-mechanical system) technology,CNC Lathe embedding technology, intelligent materials and structure, the sensor tends to be miniaturized. The mature application of MEMS micro sensors, thin film sensors and optical fiber sensors has laid a foundation for the sensor embedded in NC machine tools. Because of unpredictable or unpredictable complex phenomena and strange problems in manufacturing, as well as the timeliness, accuracy and completeness of the information being monitored, it is required that sensors have the intelligence of analysis, reasoning and learning, which requires the sensor to have a High-performance intelligent processor to act as a "brain." Qualcomm is developing an AI system microprocessor that simulates the work of the human brain. CNC Lathe In the future, through the semiconductor integration technology, high-performance Artificial intelligence system microprocessor and sensors, signal processing circuit, I/O interface, etc. integrated on the same chip, forming a large-scale integrated circuit intelligent sensor, not only has detection, identification, memory, analysis and other functions, but also self-learning * * and even thinking ability. We believe that with the progress of computer technology, signal processing technology, MEMS technology, advanced material technology and wireless communication technology, CNC Lathe the intelligent sensor will bring about a new change in the intelligent perception of NC machine tools.
Intelligent function CNC machine tool to high speed, high efficiency, high-precision development, the requirements of CNC machine tools with thermal compensation, vibration monitoring, wear monitoring, state monitoring and fault diagnosis and other intelligent functions. Combining several or several intelligent sensors, the intelligent function of NC machine tool is realized by the method of identification, analysis, CNC Lathe judgment and inference, which lays a foundation for the realization of intelligent components. The error of NC machine tool includes geometrical error, thermal (deformation) error, Force (deformation) error, assembly error and so on. The research shows that geometrical error and thermal error account for more than 50% of the total error of machine tool, which is the key factor affecting the machining accuracy of machine tools, as shown in Fig. 1. The geometrical error is the error in the manufacturing and assembling process, which is related to the structure of the machine tool. With time change is not big, CNC Lathe belongs to the static error, the error forecast model is relatively simple, can be effectively controlled by the system compensation function, but the thermal error varies with time, which belongs to the dynamic error, the error forecast model is complex, is the international research difficulty and the hot spot.