Technical applications of CNC machine tools
CNC machine tool is an automated machine tool equipped with a program control system, which can make the machine tool move and process parts according to the programmed program. It combines the latest technologies in machinery, automation, computers, measurement, microelectronics, etc., and uses a variety of sensors. The sensors used in CNC machine tools mainly include photoelectric encoders, linear gratings, proximity switches, temperature sensors, Hall sensors, and current sensors. Sensors, voltage sensors, pressure sensors, liquid level sensors, resolvers, induction synchronizers, speed sensors, etc. are mainly used to detect position, linear and angular displacement, speed, pressure, temperature, etc.
1. CNC machine tool requirements for sensors
1) High reliability and strong anti-interference;
2) Meet the requirements of accuracy and speed;
3) Easy to use and maintain, suitable for machine tool operating environment;
4) Low cost.
Different types of CNC machine tools have different requirements for sensors. Generally speaking, large machine tools require high speed response, while medium-sized and high-precision CNC machine tools mainly require accuracy.
2. Application of induction synchronizer
Inductive synchronizer is made based on the principle that the mutual inductance of two planar windings changes with different positions. Its function is to convert angle or linear displacement into the phase or amplitude of induced electromotive force, which can be used to measure linear or angular displacement. According to its structure, it can be divided into two types: linear type and rotary type. The linear induction synchronizer consists of two parts: a fixed length and a sliding ruler. The fixed length is installed on the machine bed, and the sliding ruler is installed on the moving parts and moves with the workbench. The stator of the rotary induction synchronizer is a fixed disc and the rotor is fixed. For the rotating disc. Inductive synchronizers have the advantages of high accuracy and resolution, strong anti-interference ability, long service life, simple maintenance, long-distance displacement measurement, good craftsmanship, and low cost. Rotary induction synchronizers are widely used in turntables of machine tools and instruments and in various rotary servo control systems.
