Novel Magnetic Field System for in Ultra-precision Machining

Improving the machinability of difficult-to-cut materials by introducing magnetic field assistance

Machining difficult-to-cut metallic materials poses many challenges, especially in ultra-precision machining (UPM) such as single point diamond turning (SPDT). To overcome these challenges, the research team has developed a novel machining system in which a magnetic field was added to SPDT. Under the influence of the magnetic field, the magnetic particles in difficult-to-cut materials will form into linear chains which serve as highly conductive paths for transferring heat, consequently minimizing the swelling effect after machining. Furthermore, the rotating metallic workpieces in the magnetic field are subjected to an eddy current damping effect, thereby counteracting the vibration force generated in the process. The reduction of vibration enhances the surface quality of the machined components and avoids tool damage.

Schematic of the research frame of this project

Improve the machineability of difficult to cut materials

Special Features and Advantages

Cost-efficient and green manufacturing technology - only permanent magnets are employed in machining processes, and no complicated equipment is required.

Lessens the swelling effect of materials which is common in UPM

Reduces tool damage and surface roughness of machined components

Lowers the machining costs, especially by reducing diamond tool damage

Applications

Improvement of machinability of difficult-to-cut materials e.g. titanium alloys commonly used for medical uses

Principal Investigator

Prof. Sandy TO

Department of Industrial and Systems Engineering

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