The CNC winding machine has the advantages of high speed, high precision, high flexibility and high degree of automation of all CNC equipment. The progress of the electronics industry has gradually put forward higher requirements on the CNC system and servo drive system of the winding machine, mainly from the numerical control The key technologies of the system and servo drive system are introduced. High-speed technology-To realize the high-speed CNC of the winding machine, the CNC system is first required to perform high-speed processing on the winding program composed of tiny program segments to calculate the movement of the servo motor. At the same time, the servo motor is required to be capable of high speed react. The use of 32-bit/64-bit microprocessor is an effective means to improve the high-speed processing capacity of the winding machine numerical control system.
In the high speed of CNC winding machine, increasing the spindle speed occupies an important position. The method of increasing the speed of the main shaft is to directly connect the motor and the main shaft through a coupling, and the speed change function of the coupling can greatly increase the speed of the main shaft. The wire arranging part adopts the linear motor technology to replace the ball screw technology commonly used in the wire arranging transmission of the current winding machine, which improves the acceleration while improving the arranging accuracy. In addition to the continuous use of new functional components on the winding machine, the beating and concentricity of the tooling necessary for high-speed winding under the high-speed movement of the system requires professional and reasonable design and high-precision processing to meet high-quality coils. Circumvent demand.
The problems of the numerical control system can no longer be attributed to simple geometrical movement problems or statics problems. As a dynamic object, the new type of cable rack control does not follow the rotation of the main shaft to control the applied coils, but tries to show its "flexible foresight and intelligence"; on the other hand, the applied The control must take full account of the dynamic characteristics of the controlled object in order to obtain the expected control effect. Therefore, it is no longer possible to separate the control system from the controlled object for research and manufacturing like the traditional numerical control system, but must be handled as a whole to study its dynamics under high-speed conditions and ultra-high-speed motion control conditions. The time lag effect of light and electrical signals and their elimination.
At high speeds, it is necessary to study the overall linkage that integrates the numerical control system and the control object, the nonlinear control strategy based on the overall power point, and the intelligent control method. Identification, analysis and control of electromechanical characteristic parameters. The core of high-speed control is to achieve high acceleration. For this reason, it is necessary to make the servo mechanism in the best working condition to obtain the maximum movement acceleration of the system. Therefore, the selection of the acceleration control curve based on the overall system, the identification and optimization of servo electromechanical parameters, and the coordinated control of multi-axis gains are the hotspots of the current research on the pro-type numerical control of the winding machine.
High-speed, high-precision interpolation calculation and control algorithm High-speed, high-precision interpolation is to decompose the complex automatic winding machine motion trajectory into servo control commands according to the control law. When winding highly complex coils, the winding program consists of a large number of fine adjustment programs. In addition to ensuring the continuous execution of the micro-segment program, the high-speed operation of the winding machine also needs to predict the current state of the coil in time according to the change of the spindle to achieve high acceleration Operational requirements. This requires in-depth research on the high-speed, high-precision interpolation, high-speed preprocessing of micro-segment programs, acceleration and deceleration control of micro-segment programs, advanced position prediction, direct interpolation of complex trajectories, and high-speed data transmission. For the principle and method of CNC programming for high-speed and high-precision coil winding, traditional CNC programming solves the problem of the movement of the wire frame with the axis in the middle and low speed motions, but the high-speed winding program is based on the principle and method of CNC programming. Put forward higher requirements. to this end. It is necessary to study the principles and methods of numerical control programming suitable for high-speed and high-precision winding on the basis of studying the mechanism of high-speed winding technology. In this regard, the high-speed motion process mechanism of the winding machine, the knowledge base of high-speed winding parameters, the planning based on the high-speed nonlinear motion error compensation of the winding machine, the smooth transition of program speed changes, the STEP-based speed standard, and the feature-oriented winding program The high-level C language, etc. are all things that need to be studied. High-precision technology improves the operating accuracy of CNC winding machines, generally by reducing the error of the CNC system and adopting the machine's forward-looking error compensation technology.
In reducing the control error of the CNC system, the method of increasing the resolution of the CNC system and improving the position detection accuracy is usually adopted. However, in the case of high-speed and high-precision winding, there is a contradiction between high-precision and large-range geometrical quantities in online dynamic measurement and compensation, which is difficult to complete with traditional detection methods. Therefore, it is necessary to study new measurement and compensation mechanisms, that is, research on the principle of high-precision, large-range geometrical online dynamic detection, and research on the online and real-time detection, prediction and compensation methods of control errors. Feed control and nonlinear control methods. In order to solve the contradiction between the small step length and the large stroke in the high-speed and high-precision operation of the winding machine, it is necessary to study new high-speed driving principles and mechanisms
