I. Overview
1î€Intelligent CNC system technical connotation
The intelligent CNC system technology is a technology that studies the geometric information and processing technology information of the workpiece to be processed by the intelligent AC servo system, converted into a series of motion and motion commands, and sent to the servo motor to complete the workpiece processing.
2î€ The status and role of intelligent CNC system technology
In advanced manufacturing technology, intelligent CNC system technology is the most important basic technology of flexible manufacturing automation technology. CNC machine tools with intelligent AC servo system have good adaptability to general processing, and are single-piece, medium- and small-volume conventional parts or conventional. The processing of complex parts provides efficient automated processing.
Second, the frontier analysis of intelligent CNC system technology
1 需求 demand in the early tenth century
High precision, high speed, high flexibility, high reliability, compound processing function, intelligent and open intelligent CNC system based on industrial PC.
2î€Intelligent CNC system technology development trend
(1) High-speed, high-precision and multi-axis (5-axis or more) simultaneous machining.
(2) High reliability.
(3) It has certain intelligence capabilities.
(4) Have perfect monitoring and diagnostic capabilities.
(5) Easy to access or network.
(6) Simplify programming and enable graphical simulation.
(7) Can control a variety of peripheral devices.
3î€Intelligent CNC system technology development frontier analysis
The research of high-performance intelligent AC servo system is the forefront of the development of intelligent CNC system technology. The artificial intelligence system such as artificial neural network, expert system, fuzzy logic and genetic algorithm is combined with modern AC servo control theory method to study the control method suitable for high performance intelligent AC servo system: hierarchical hierarchical intelligent control, qualitative and quantitative Control coordination method, fuzzy neural network parallel learning algorithm, intelligent fault-tolerant robust controller design and intelligent control stability analysis method. The AC servo system achieves the goal of fast response, high precision, robustness and high intelligence, and can be applied in high-precision CNC machine tools.
4î€Intelligent CNC system technology development characteristics
(1) The high-speed 32-bit processor is selected, which adopts high-speed and high-precision sampling interpolation to greatly increase the sampling frequency. According to the change of the curvature of the interpolation curve, the feed rate is adaptively adjusted and the acceleration and deceleration control is automatically performed.
(2) Multi-axis control is realized by intelligent AC servo system.
(3) It adopts open CNC system based on industrial PC, color CRT graphic display, man-machine dialogue and automatic diagnosis function, with various monitoring, monitoring and compensation functions.
(4) It has strong network functions, systemized functions and communication functions to achieve standardization, generalization and modularization.
(5) Double-closed position control of the rotation of the jujube line, real-time mapping processing control and attitude adaptive control.
Third, the important technical analysis and prediction of intelligent numerical control system
1î€Intelligent CNC System Technology Overview
(1) Highly achievable. High-speed 586, 686 and other new high-performance CPUs are selected as the core of the system's operation and control. The CPU mainly completes tasks such as system management, human-computer interaction, dynamic display, pre-processing, and interpolation calculation. Improve system integration, strictly control quality, and adopt strong anti-interference and high-visibility design in software design, power supply design, connector design, grounding and shielding design, so as to improve the system's reliability.
(2) High precision control. The control precision of the CNC system is the key to ensure the machining accuracy of CNC machine tools. The numerical control system adopts high-precision intelligent AC servo system drive control for each coordinate axis of the machine tool. High-precision intelligent AC servo system consists of intelligent controller, automatic detection and automatic identification technology with 586 or 686 microcomputer, new power electronics (IGBT) inverter, digital signal processor (DSP), digital position sensor, SPWM And an alternating current permanent magnet synchronous motor or a cage asynchronous servo motor. Using knowledge engineering, machine learning, artificial intelligence technology, real-order logic model, fuzzy Petri net principle and method, the knowledge structure, general knowledge representation and knowledge acquisition method suitable for complex AC servo system are established, which provides comprehensive intelligent control. Information base. Focusing on the characteristics of fuzzy logic, artificial neural network, genetic algorithm and expert system (self-learning, self-organization, self-identification) on the AC servo controller, designing an intelligent controller that does not depend on the object model, which is intelligent The basis of the AC servo system.
(3) Easy to operate. In terms of operation, the use of multimedia technology, increased touch screen operation function and voice prompt function, making the use of the system more convenient.
(4) Automation of processing information acquisition. In terms of processing information acquisition, the CAD/CAM/CNC integration is realized upwards, making the processing of complex work easier; the physical processing function is added downwards to realize the non-program NC machining.
(5) Advanced functions. On the one hand, the new fieldbus networking technology is adopted to increase the real-time control function of the network, so that the CNC machine tools can be conveniently formed into a production line, which is managed and controlled by the central computer to improve the operational efficiency of the machine tool. On this basis, the FMS and the FMS can be further constructed. CIMS; on the other hand, the attitude adaptive control function makes it possible to improve the agility of the machining process without using precision fixtures or manual alignment when machining single-piece small batch workpieces.
(6) Modular open structure. The system software and hardware adopt modular open structure, which not only makes the system configuration flexible, but also can be applied to various equipments such as lathes, milling machines, drilling machines, grinding machines, machining centers and electric processing machines, and also makes the system easy to expand functions and upgrades.
2î€Intelligent CNC system technology research and development forecast
(1) The growth rate of research and development. Through the "Eighth Five-Year Plan", China's numerical control technology, especially its core technology, has entered a new stage of development. It has been introduced, digested and absorbed into a new stage of independent development, laying the foundation for the research of intelligent numerical control system technology. basis. The technology's R&D expenses are growing at an annual rate of more than 10%.
(2) Social conditions are constrained. Due to problems such as segmentation and industry barriers, the state has weakened the research, production organization and coordination capabilities of intelligent CNC systems, resulting in poor national macro-control effects, resulting in the dispersion of technical power in the research and development of intelligent CNC systems. In addition, it hinders the healthy development of the intelligent numerical control system in certain procedures.
(3) Economic conditions are constrained. The state has less investment in intelligent numerical control and lacks corresponding technical specifications and development goals, which has adversely affected the development of intelligent numerical control systems.
(4) Forecast of the period of practical use. Since the key technologies in the intelligent CNC system technology need further research and improvement, the application of the intelligent CNC system technology is about 2005.
3î€ Breakthrough point in the development of intelligent CNC system technology
The breakthrough point of the development of intelligent CNC system technology is the development of high-precision intelligent AC servo system. Its intelligence level determines the control precision of CNC system and is the key technology to improve the machining precision of CNC machine tools.
4î€Market forecast
Intelligent CNC system technology is the core of advanced manufacturing technology, which is related to the national strategic position and comprehensive national strength, and its market prospect is broad. It is estimated that by 2010, the domestic CNC machine tools will occupy 50% of the domestic market, of which intelligent CNC machine tools account for 20%.
Fourth, planning development project recommendations
1î€ Development status and trend of intelligent CNC system technology in foreign countries
(1) Key technologies of intelligent numerical control system technology The research and development and application of high-performance intelligent AC servo system have attracted great attention at home and abroad. Foreign countries have developed and developed general-purpose inverters and high-performance products. Many types of high-precision AC servo systems have been successfully applied to CNC machine tool position control and electric drive actuators. Domestic research in this area is at a relatively low level. The level of localization and localization is low, and there is no corresponding product series, which can not meet the needs of industry. Further research is still needed. The development trend is to study the control theory and detection technology of high-precision, high-accuracy, fast-response intelligent AC servo system.
(2) A notable feature of the development of intelligent CNC system technology is the emergence of an open CNC system based on industrial PCs. Industrial PCs enter the field of numerical control systems with high performance, low price, high reliability and open structure, which makes the CNC system more capable of developing, can achieve high precision machining, improve resolution, improve servo tracking system, and control functions. Yes, and the price has dropped significantly. Therefore, in recent years, numerical control systems based on industrial PCs have become hot topics. Major CNC companies at home and abroad are committed to developing new open CNC systems.
The development trend is to further study a series of problems such as susceptibility and real-time, paving the way for the market for all open intelligent CNC system products.
2î€ Planning objectives and priorities
There are great innovations and developments in the following areas, some of which are close to or reach the international advanced level.
(1) The sensor information fusion processing technology of complex AC servo control system solves complex information acquisition and improves the control precision of the servo system.
(2) Coordinated optimization, self-learning, self-organizing and self-identification control methods for high-precision digital servo systems.
(3) Develop an AC servo drive system with fast response, high precision, robustness, high reliability and intelligent performance.
(4) Research on the issue of real-time guarantee. Real-time means that the data processing speed of the system can meet the requirements of servo drive. Since the numerical control system is quite sensitive to the control time lag during position control, the real-time requirements for the intelligent numerical control system are quite high.
(5) Research on high-speed network technology. In order to realize the openness between the various components of the intelligent CNC system, it is necessary to standardize the interface of each component. The servo drive interface is mainly based on the network interface. In order to ensure the servo control performance of numerical control equipment, the communication network and interface technology for high-speed servo are important technologies of intelligent numerical control system.
(6) Research on software development issues. For a long time, CNC has accumulated a large amount of practical software. Reconstructing or transplanting these softwares in an open industrial PC environment is a problem worth studying. At the same time, we should make full use of the software and hardware resources of existing PCs to develop and apply intelligent CNC systems.
3î€Intelligent CNC system technology main research content
(1) Establish a hybrid knowledge model of the AC servo system.
(2) Study new fast identification, optimization and self-learning control algorithms.
(3) Optimal robust servo control with adaptive and self-learning functions.
(4) Coordinated control of high precision digital servo system.
(5) Automatic detection and automatic identification of multi-sensor information fusion.
(6) High-precision and multi-axis or more linkage processing.
(7) Develop a new network CNC system based on CAN bus.
(8) Realize CAD/CAM/CNC integration, and can perform on-site modeling, programming, modification and numerical control processing on 3D curved surfaces.
(9) Implement parallel processing of multitasking. At the same time as CNC machine tools, users can also perform geometric modeling and NC programming on the system.
(10) Compatible with the programmable logic controller to ensure the complex logic control functions such as tool magazine management and spindle management.
Intelligent CNC system technology is the most important basic technology in advanced manufacturing technology. It features high reliability, high control precision, easy to use, automatic processing information acquisition, advanced functions and modular open structure. Its key technology is the research and development of high-performance intelligent AC servo systems. The core of the new generation of intelligent CNC systems is an open system that is designed to be compatible with PC architecture and multi-machine system interconnect technology.
1î€Intelligent CNC system technical connotation
The intelligent CNC system technology is a technology that studies the geometric information and processing technology information of the workpiece to be processed by the intelligent AC servo system, converted into a series of motion and motion commands, and sent to the servo motor to complete the workpiece processing.
2î€ The status and role of intelligent CNC system technology
In advanced manufacturing technology, intelligent CNC system technology is the most important basic technology of flexible manufacturing automation technology. CNC machine tools with intelligent AC servo system have good adaptability to general processing, and are single-piece, medium- and small-volume conventional parts or conventional. The processing of complex parts provides efficient automated processing.
Second, the frontier analysis of intelligent CNC system technology
1 需求 demand in the early tenth century
High precision, high speed, high flexibility, high reliability, compound processing function, intelligent and open intelligent CNC system based on industrial PC.
2î€Intelligent CNC system technology development trend
(1) High-speed, high-precision and multi-axis (5-axis or more) simultaneous machining.
(2) High reliability.
(3) It has certain intelligence capabilities.
(4) Have perfect monitoring and diagnostic capabilities.
(5) Easy to access or network.
(6) Simplify programming and enable graphical simulation.
(7) Can control a variety of peripheral devices.
3î€Intelligent CNC system technology development frontier analysis
The research of high-performance intelligent AC servo system is the forefront of the development of intelligent CNC system technology. The artificial intelligence system such as artificial neural network, expert system, fuzzy logic and genetic algorithm is combined with modern AC servo control theory method to study the control method suitable for high performance intelligent AC servo system: hierarchical hierarchical intelligent control, qualitative and quantitative Control coordination method, fuzzy neural network parallel learning algorithm, intelligent fault-tolerant robust controller design and intelligent control stability analysis method. The AC servo system achieves the goal of fast response, high precision, robustness and high intelligence, and can be applied in high-precision CNC machine tools.
4î€Intelligent CNC system technology development characteristics
(1) The high-speed 32-bit processor is selected, which adopts high-speed and high-precision sampling interpolation to greatly increase the sampling frequency. According to the change of the curvature of the interpolation curve, the feed rate is adaptively adjusted and the acceleration and deceleration control is automatically performed.
(2) Multi-axis control is realized by intelligent AC servo system.
(3) It adopts open CNC system based on industrial PC, color CRT graphic display, man-machine dialogue and automatic diagnosis function, with various monitoring, monitoring and compensation functions.
(4) It has strong network functions, systemized functions and communication functions to achieve standardization, generalization and modularization.
(5) Double-closed position control of the rotation of the jujube line, real-time mapping processing control and attitude adaptive control.
Third, the important technical analysis and prediction of intelligent numerical control system
1î€Intelligent CNC System Technology Overview
(1) Highly achievable. High-speed 586, 686 and other new high-performance CPUs are selected as the core of the system's operation and control. The CPU mainly completes tasks such as system management, human-computer interaction, dynamic display, pre-processing, and interpolation calculation. Improve system integration, strictly control quality, and adopt strong anti-interference and high-visibility design in software design, power supply design, connector design, grounding and shielding design, so as to improve the system's reliability.
(2) High precision control. The control precision of the CNC system is the key to ensure the machining accuracy of CNC machine tools. The numerical control system adopts high-precision intelligent AC servo system drive control for each coordinate axis of the machine tool. High-precision intelligent AC servo system consists of intelligent controller, automatic detection and automatic identification technology with 586 or 686 microcomputer, new power electronics (IGBT) inverter, digital signal processor (DSP), digital position sensor, SPWM And an alternating current permanent magnet synchronous motor or a cage asynchronous servo motor. Using knowledge engineering, machine learning, artificial intelligence technology, real-order logic model, fuzzy Petri net principle and method, the knowledge structure, general knowledge representation and knowledge acquisition method suitable for complex AC servo system are established, which provides comprehensive intelligent control. Information base. Focusing on the characteristics of fuzzy logic, artificial neural network, genetic algorithm and expert system (self-learning, self-organization, self-identification) on the AC servo controller, designing an intelligent controller that does not depend on the object model, which is intelligent The basis of the AC servo system.
(3) Easy to operate. In terms of operation, the use of multimedia technology, increased touch screen operation function and voice prompt function, making the use of the system more convenient.
(4) Automation of processing information acquisition. In terms of processing information acquisition, the CAD/CAM/CNC integration is realized upwards, making the processing of complex work easier; the physical processing function is added downwards to realize the non-program NC machining.
(5) Advanced functions. On the one hand, the new fieldbus networking technology is adopted to increase the real-time control function of the network, so that the CNC machine tools can be conveniently formed into a production line, which is managed and controlled by the central computer to improve the operational efficiency of the machine tool. On this basis, the FMS and the FMS can be further constructed. CIMS; on the other hand, the attitude adaptive control function makes it possible to improve the agility of the machining process without using precision fixtures or manual alignment when machining single-piece small batch workpieces.
(6) Modular open structure. The system software and hardware adopt modular open structure, which not only makes the system configuration flexible, but also can be applied to various equipments such as lathes, milling machines, drilling machines, grinding machines, machining centers and electric processing machines, and also makes the system easy to expand functions and upgrades.
2î€Intelligent CNC system technology research and development forecast
(1) The growth rate of research and development. Through the "Eighth Five-Year Plan", China's numerical control technology, especially its core technology, has entered a new stage of development. It has been introduced, digested and absorbed into a new stage of independent development, laying the foundation for the research of intelligent numerical control system technology. basis. The technology's R&D expenses are growing at an annual rate of more than 10%.
(2) Social conditions are constrained. Due to problems such as segmentation and industry barriers, the state has weakened the research, production organization and coordination capabilities of intelligent CNC systems, resulting in poor national macro-control effects, resulting in the dispersion of technical power in the research and development of intelligent CNC systems. In addition, it hinders the healthy development of the intelligent numerical control system in certain procedures.
(3) Economic conditions are constrained. The state has less investment in intelligent numerical control and lacks corresponding technical specifications and development goals, which has adversely affected the development of intelligent numerical control systems.
(4) Forecast of the period of practical use. Since the key technologies in the intelligent CNC system technology need further research and improvement, the application of the intelligent CNC system technology is about 2005.
3î€ Breakthrough point in the development of intelligent CNC system technology
The breakthrough point of the development of intelligent CNC system technology is the development of high-precision intelligent AC servo system. Its intelligence level determines the control precision of CNC system and is the key technology to improve the machining precision of CNC machine tools.
4î€Market forecast
Intelligent CNC system technology is the core of advanced manufacturing technology, which is related to the national strategic position and comprehensive national strength, and its market prospect is broad. It is estimated that by 2010, the domestic CNC machine tools will occupy 50% of the domestic market, of which intelligent CNC machine tools account for 20%.
Fourth, planning development project recommendations
1î€ Development status and trend of intelligent CNC system technology in foreign countries
(1) Key technologies of intelligent numerical control system technology The research and development and application of high-performance intelligent AC servo system have attracted great attention at home and abroad. Foreign countries have developed and developed general-purpose inverters and high-performance products. Many types of high-precision AC servo systems have been successfully applied to CNC machine tool position control and electric drive actuators. Domestic research in this area is at a relatively low level. The level of localization and localization is low, and there is no corresponding product series, which can not meet the needs of industry. Further research is still needed. The development trend is to study the control theory and detection technology of high-precision, high-accuracy, fast-response intelligent AC servo system.
(2) A notable feature of the development of intelligent CNC system technology is the emergence of an open CNC system based on industrial PCs. Industrial PCs enter the field of numerical control systems with high performance, low price, high reliability and open structure, which makes the CNC system more capable of developing, can achieve high precision machining, improve resolution, improve servo tracking system, and control functions. Yes, and the price has dropped significantly. Therefore, in recent years, numerical control systems based on industrial PCs have become hot topics. Major CNC companies at home and abroad are committed to developing new open CNC systems.
The development trend is to further study a series of problems such as susceptibility and real-time, paving the way for the market for all open intelligent CNC system products.
2î€ Planning objectives and priorities
There are great innovations and developments in the following areas, some of which are close to or reach the international advanced level.
(1) The sensor information fusion processing technology of complex AC servo control system solves complex information acquisition and improves the control precision of the servo system.
(2) Coordinated optimization, self-learning, self-organizing and self-identification control methods for high-precision digital servo systems.
(3) Develop an AC servo drive system with fast response, high precision, robustness, high reliability and intelligent performance.
(4) Research on the issue of real-time guarantee. Real-time means that the data processing speed of the system can meet the requirements of servo drive. Since the numerical control system is quite sensitive to the control time lag during position control, the real-time requirements for the intelligent numerical control system are quite high.
(5) Research on high-speed network technology. In order to realize the openness between the various components of the intelligent CNC system, it is necessary to standardize the interface of each component. The servo drive interface is mainly based on the network interface. In order to ensure the servo control performance of numerical control equipment, the communication network and interface technology for high-speed servo are important technologies of intelligent numerical control system.
(6) Research on software development issues. For a long time, CNC has accumulated a large amount of practical software. Reconstructing or transplanting these softwares in an open industrial PC environment is a problem worth studying. At the same time, we should make full use of the software and hardware resources of existing PCs to develop and apply intelligent CNC systems.
3î€Intelligent CNC system technology main research content
(1) Establish a hybrid knowledge model of the AC servo system.
(2) Study new fast identification, optimization and self-learning control algorithms.
(3) Optimal robust servo control with adaptive and self-learning functions.
(4) Coordinated control of high precision digital servo system.
(5) Automatic detection and automatic identification of multi-sensor information fusion.
(6) High-precision and multi-axis or more linkage processing.
(7) Develop a new network CNC system based on CAN bus.
(8) Realize CAD/CAM/CNC integration, and can perform on-site modeling, programming, modification and numerical control processing on 3D curved surfaces.
(9) Implement parallel processing of multitasking. At the same time as CNC machine tools, users can also perform geometric modeling and NC programming on the system.
(10) Compatible with the programmable logic controller to ensure the complex logic control functions such as tool magazine management and spindle management.
Intelligent CNC system technology is the most important basic technology in advanced manufacturing technology. It features high reliability, high control precision, easy to use, automatic processing information acquisition, advanced functions and modular open structure. Its key technology is the research and development of high-performance intelligent AC servo systems. The core of the new generation of intelligent CNC systems is an open system that is designed to be compatible with PC architecture and multi-machine system interconnect technology.
mono Screw Pump aslo beed called single screw pump. pump beed usde to transfer sludge, mud and sauce etc thick liquid. the general mono screw pump is be used to transfer sludge, mud etc thick liquid. it's have large flow rate and high pressure. stainless steel material mono screw pump can be used to transfer tomato sauce, bolognese, sesame sauce etc, pump also can with the hopper and reamer. all according customer's requirment. single screw pump belongs to the rotor type positive displacement pump, it is depend on the screw meshing with liner on the discharge and suction cavity to conveying liquid volume change.It is a kind of method of pressurized screw pump, a main working parts by bushing has a double helix cavity (stator) and the stator cavity and its meshing single-head screw screw (rotor).When the input shaft through the universal joint drive making planets revolving around the center of the stator, rotor stator, rotor, vice is continuous mesh form sealed cavity, the seal chamber volume invariably uniform axial movement, the medium from the suction end of deputy to the stator, rotor pressure side, the suction medium sealed cavity through the stator without stirring and destruction.
Mono Screw Pump,Industrial Screw Pump,Sludge Screw Pump,Mono Single Screw Pump
Botou Honghai Pump Co.,Ltd , https://www.pumphonghai.com