Fabrication of Non-Contact Magnetic Screws by Additive Manufacturing

Tsung Wei Chang, Po Wei Huang, Shih Hao Kung, Cheng Hsin Shih, Mi Ching Tsai, Chinweze U. Ubadigha, Wen Cheng Chang, Ching Chien Huang

Research output: Contribution to journalArticlepeer-review


Magnetic screws are characterized by their noncontact features, thus eliminating the disadvantage of friction loss inherent in traditional screws. Some applications require spiral-shaped screws; however, commercially available magnets are rarely spiral in shape. To obtain spiral-shaped screws, manufactures require molds or the magnets are spliced to desired shape. Unfortunately, these two fabrication processes both have drawbacks, which include, discontinuity in the magnetic flux, high cost, and reduced efficiency. This article therefore presents alternative approach that involves the design and fabrication of spiral magnetic screws via 3-D printing with magnetic materials. The prototypes were fabricated using two 3-D printing techniques, pellet deposit melting (PDM) and hybrid soft magnet selective laser melting (SLM). Finite element method is adopted to simulate and validate the fabricated magnetic screw. Experiment results, using the PDM fabricated magnets and the hybrid soft magnet SLM combined with commercial sintered NdFeB magnet are also provided, along with, verification of the design characteristics and the simulation results.

Original languageEnglish
Article number8001805
JournalIEEE Transactions on Magnetics
Issue number8
Publication statusPublished - 2022 Aug 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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