CNC technology development trends
1 CNC system developments at home and abroad
With the rapid development of computer technology, the traditional beginning of a fundamental change manufacturing, the industrial developed countries spent huge sums of money on the modern manufacturing technology rearch and development, to create a new model. In modern manufacturing systems, CNC technology is the key to technology, which combines microelectronics, computers, information processing, automatic detection, automatic control, such as the integration of advanced, a high-precision, high-efficiency, flexible automation, and other characteristics, the manufacturing industry Flexible automation, integrated, intelligent play the pivotal role. At prent, NC technology is undergoing a fundamental change, from a special clod-loop control mode to general-purpo real-time dynamic open all clod-loop control mode. In the integrated on the basis of the CNC systems ultra-thin, ultra-light; on the basis of the intelligent, integrated computers, multimedia, fuzzy control, neural network and other technical disciplines, NC system to achieve high-speed, high-precision, Efficient control, automatic processing can be amended to regulate compensation and the parameters for an online intelligent fault diagnosis and treatment of the network bad on the CAD / CAM and CNC systems integration as one machine network, makes the central government centralize
d control of the group control processing.
For a long time, China's CNC system for traditional clod architecture, but only as a non-intelligent CNC machine controller. Process variables bad on experience in the form of pre-fixed parameters, processing procedures before the actual processing by hand or through CAD / CAM and automatic programming system prepared. CAD / CAM and CNC have no feedback control link, the entire manufacturing process CNC is a clod ring-opening implementing agencies. In a complex and changing environment under the conditions of processing tool in the process of composition, workpiece material, spindle speed, feed rate, tool path, cutting depth, step, allowance and other processing parameters, not at the scene circumstances under external interference and real-time dynamic random factors, not by random amendment feedback control link CAD / CAM ttings volume, in turn, affect the work of CNC
手的成语有哪些machining efficiency and product quality. Clearly, the traditional fixed CNC system that controlled mode and clod architecture, limiting the CNC to the development of more intelligent control variables, can no longer meet the increasingly complex manufacturing process, therefore, the CNC technology in the potential for change inevitable.
不运动怎么减肥最快2 CNC technology development trends
方兴未艾是什么意思
2.1 Performance development direction
(1) high-speed high-precision efficient speed, accuracy and efficiency of machinery manufacturing technology is the key performance indicators. As a result of the high-speed CPU chips, RISC chip, as well as multi-CPU control system with high-resolution detector of the absolute exchange digital rvo system, taken at the same time improve the machine dynamic and static characteristics of effective measures, the high-speed high-precision machine has been efficient greatly enhanced.
(2) Flexible includes two aspects: CNC system itlf flexibility, NC system is modular in design, functional coverage, can be cut and strong, and easy to meet the needs of different urs; group control system flexibility, with a control system pursuant to the requirements of different production process, materials flow and information flow automatically dynamically adjusted to maximize their group control system performance.创新的含义
(3) Process of composite and multi-axis to reduce the process time for the main purpo of supporting the composite processing, and are moving towards multi-axis, multi-function control of the direction of ries development. NC Machine Tool Technology composite refers to the workpiece in a single machine on a fixture, through an automatic tool change, rotating spindle head or turntable,
and other measures to accomplish multiple process, multi-surface machining compound. Axis CNC technology, Siemens 880-axis control system for up to 24 axes.
(4) Real-time Intelligent early for the real-time system is usually relatively simple ideal environment, and its role is to scheduling tasks, to ensure that the task be completed within a specified time limit. And artificial intelligence is ud to model the realization of mankind's various intelligent behaviors. To the development of science and technology today, real-time systems and artificial intelligence combined
with each other towards artificial intelligence is a real-time respon, a more realistic field of development, and also in the real-time system with intelligent behavior, the more complex application development, resulting in the Intelligent real-time control of this new area. NC technology in the field, real-time intelligent control of the rearch and application of development along veral main branches: adaptive control, fuzzy control, neural network control, experts control, learning control, feed-forward control. For example, in CNC programming system with expert systems, fault diagnosis expert system parameters automatically t and tool management and automatic compensation, such as adaptive conditioning systems, in high-speed processing of the integrated motion control ahead of the introduction of budget projections and functional, dynamic Feedforward f
unctions in pressure, temperature, position, velocity, control, fuzzy control, the control of the NC system performance greatly improved, so as to achieve optimal control purpos.
2.2 functional development direction
(1) The ur interface is graphical ur interface with the CNC system of dialogue between the ur interface. Since different urs interface requirements are different, thus the development of the workload of great ur interface, ur interface software developed into the most difficult part of. At prent INTERNET, virtual reality, visualization in scientific computing and multimedia technologies, such as the ur interface has put a higher demand. Graphical ur interface greatly facilitates the u of non-professional urs, it can be carried out through the window and menu operation, ea of programming and blueprint for rapid programming, three-dimensional dynamic three-dimensional color graphics, graphics, simulation, graphics, dynamic tracking and simulation, and the different directions view and partial display ratio scaling function can be achieved.
(2) visualization in scientific computing visualization in scientific computing can be ud for efficient data processing and interpretation of data, so that the exchange of information is no longer limited to using the written word and language, and can direct the u of graphics, image, animation, video an金桔冰糖
d other information. Visualization technology and virtual environment technology, to further broaden the application areas, such as a drawing design, virtual prototyping technology, which
shorten product design cycles, improving product quality, reduce production cost is of great significance. NC technology in the areas of visualization technology can be ud for CAD / CAM, such as automatic programming design parameters automatically t, tool compensation and tool management of dynamic data processing and display, as well as the processing of visual simulation, and other prentations.
(3) interpolation, and a variety of methods of compensation interpolation methods such as multiple linear interpolation, circular interpolation, cylindrical interpolation, space elliptical surface interpolation, thread interpolation, polar coordinates interpolation, 2 D +2 helical interpolation , NANO interpolation, interpolation NURBS (non-uniform rational B-spline interpolation), spline interpolation (A, B, C kind), such as polynomial interpolation. A variety of functions such as compensation gap compensation vertical compensation quadrant error compensation, and measurement systems pitch error compensation, and speed-related feedforward compensation and temperature compensation, with nearly smooth and exit, as well as the opposite point of the cutter radius compensation.
(4) high-performance PLC contents contents performance CNC system PLC control module can be directly ud ladder diagram or high-level language programming, with intuitive online debugging and online help function. Programming tools include the standard ud lathe and milling machine PLC ur program an example, urs may PLC ur program standards on the basis of editorial changes, thus easily build their own applications.
(5) application of multimedia technology of multimedia technology-computers, audio-visual and communication technology, and it has the computer integrated voice, text, images and video information. In NC technology, multimedia technology can be applied to information processing integrated, intelligent, real-time monitoring system in the field and production equipment fault diagnosis, monitoring of process parameters such as production has a significant value.
磷酸肌酸激酶2.3 Development of the Architecture
(1) integration of a highly integrated CPU, programmable RISC chips and large-scale integrated circuits FPGA, EPLD, CPLD and ASIC ASIC chips that can improve the CNC system integration and hardware and software operating speed.
宝宝防蚊Application FPD flat panel display technology can improve display performance. Flat-panel displays
with high science and technology content, light weight, small size, low power consumption and portability advantages can be realized Supersized, a counterweight to the emerging and CRT display technology, display technology in the 21st century the mainstream. Application of advanced packaging and interconnect technologies, miconductors and surface mount technology integration. By increasing the density of integrated circuits, reducing the length and number of interconnection products to reduce prices, improve performance, reduce component size, improve the reliability of the system.
(2) easy to implement modular hardware modular NC systems integration and standardization. According to various functional requirements, the basic modules, such as CPU, memory, position rvo, PLC, the input and output interfaces, and communications modules, making the standard Series products, through functional building-block approach to cutting the number of steps and modules, a NC system at different grades.
(3) machine interconnection network for remote control of unmanned operation. Machine through networking, can be in any one machine on the other machine programming, configuration, operation, operating, different machine can be displayed on the screen each machine on the screen.
隶组词
(4) general-open the clod-loop control mode to adopt a common computer component Bus, modular, open, embedded architecture, ea of cutting, expansion and upgrading, can be compod of different grades, different types, different degree of integration CNC system. Clod-loop control mode is the traditional CNC system only for single clod-open-loop control mode propod. The manufacturing process is a multi-variable control and the role of integrated processing complex process, including processing, such as size, shape, vibration, noi, temperature and thermal deformation, and other factors, therefore, to achieve the process of multi-objective optimization, Multivariable must adopt the clod-loop control, real-time processing in the dynamic adjustment process variables. Processing the adoption of open universal real-time clod-loop control mode the whole dynamic, easy real-time
