In the MR fluid Jet polishing process, the viscosity characteristics of the jetted MR fluid depend on the strength of the magnetic field, which is one of the important factors. Also, the yield stress of the MR fluid increases depending on the strength of the magnetic field, which affects the material removal rate and surface roughness of the workpiece. Therefore, a study was conducted to manufacture the optimal electromagnet part through electromagnet design and analysis. It was confirmed that the magnetic field strength at the front of the electromagnet was 6624.3G, 8554.6G at the half point of the center of the electromagnet, and 6543G at the middle of the electromagnet, and that the area where the magnetic field was most concentrated in the nozzle discharge area was the half point of the center. It was also confirmed that the magnetic field distribution was concentrated in the high-pressure nozzle at the half point of the center of the electromagnet. Through this, it is expected that the MR fluid will be able to have a sufficient magnetic field effect on the MR fluid while passing through the high-pressure nozzle at a high speed.

• 이정원(Department Semiconductor Metrology of Korea Polytechnic colleges) | Jung-Won Lee Corresponding author