Non-contact loading of high speed motorized spindle

To overcome the existing problems in the contact-loading, such as friction, vibration and noise, the method of loading by the electromagnet was put forward. Motorized spindle non-contact loading test platform was developed. The attractive force formula of the loading device was deduced. The loading force value was theoretically calculated by division of magnetic path and simulated by FEM. Loading forces in different input current of electromagnet were collected. Comparing theoretically calculated and simulated values with actual load collected by experiments, the correctness and feasibility of non-contact loading was verified. Data acquisition of loading forces in different speed of motorized spindle was carried out, and the forces and loading speed relation curve were deduced. The results show that the calculated values and simulation values are close to measured results, which indicates that the test platform is designed correctly. The test platform can accurately capture the efficiency loading force, temperature and so on.