The application of magnetic force bearing on main shaft of machine tool high speed

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  • source:GERHOLD CNC Machining
Application of magnetic force bearing can gain the rotate speed of 100000rpm on high speed main shaft, can raise the surface to machine the effect on one hand, on the other hand its service life is more than traditional bearing far. Although this one technology still is in archetypal experiment phase, but the body with a lot of already sufficient advantage comes out now. Its function does not suffer the effect of fuel factor, did not wear away, can close automatically below the circumstance of overload machine. Traditional bearing gives priority to what the axis offers radial or axial to prop up, allow the opposite movement between inner ring and outer lane. Be linked together by ball or roller between inner ring and outer lane, the force that prop up also is in this 3 person between deliver. Oily film bearing does not have ball or roller, it uses pressure oil to undertake lubricate or coming loose heating up. The applied history that two kinds of bearing had had above hundreds years. Magnetic force bearing to rotating the means propping up of the component is different from above however two kinds of products. Magnetic force bearing is bearing of contact of a kind of blame, it makes turn through electromagnetism force component in suspension between fixed component. Also mean without attrition, did not wear away, and taller stability, and can achieve higher rate. Electromagnetism force basically is concerned with the size of electric current and aeriform clearance, sensor collects the data of space size, control system basis inputs signal adjustment electric current to output. Magnetic force bearing basically forms by 3 parts: Bearing reachs sensor: Bearing provides the power that prop up to main shaft, sensor is in charge of collecting positional signal; Control a system: Be in charge of providing electric power, and according to feedback signal computation gives true correctional power, differ with drive directional controller; Software system: Be in charge of undertaking computation and output to feedback signal. The drawback with magnetic force main bearing depends on: Volume is huge, need power source, and complex structure and algorithm. CNC Milling