As the problems of high speed motorized spindle's contact loading, a non-contact loading equipment with electromagnet was designed. The equipment was mainly composed by loading disc with high permeability, direct current(DC) electromagnet, constant current source testing part. The electromagnetic force was produced on loading disc during interaction between the iron-nickel alloy loading disc with diameter of 80mm, thick of 40mm and DC air-gap magnetic field. The spindle load of cutting forces was simulated by the electromagnetic forces. And so non-contact loading on high speed motorized spindle could be realized. Using the presented equipment, loading experiments were done to the grinding motorized spindle with type of 170MD18Y16. And the results show that the value of loading and setting are accordant. The presented equipment can meet the requirements for the loading on high speed motorized spindle. The rotate speed of spindle and exciting current are main factors influencing non-contact electromagnetic loading during the air-gap unchanged.
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2014, Vol. 25 
