Magnetic tool for nano finishing the holes, vertical and horizontal surfaces

Student of Indian Institute of Technology Delhi, Girish Chandra Verma won the award for research work of  Magnetic tool for nano finishing the holes, vertical and horizontal surfaces. He carried his project work under guidance of Prof. Pulak Mohan Pandey.

The developed tool is based on MAF principle for polishing holes, blind holes, grooves and vertical surfaces. The tool developed in the present work consists of five main components, which are two cylindrical magnets (having magnetic flux density of 0.452 T), a mild steel piece, a copper casing, and an upper head made of mild steel. In the developed tool the magnets were arranged in such a way that, similar pole of both the magnets faces each other. Due to this the magnetic lines of force from both the magnets get directed to radial direction. Using this concept of similar pole facing each other; a high magnetic flux density 0.8 T is achieved around the circumferential area of mild steel piece. The developed tool also produces variable magnetic flux density so that material of different hardness can be finished. For obtaining a variable magnetic flux density, the gap between the upper magnet and ferromagnetic piece is altered with the help of nut and bolt arrangement provided on the upper piece of copper casing and upper head. The size of the developed tool can also be modified by using different sizes of magnets and casing, which can be used to finish hole of different sizes. Experimentation on SS304 stainless steel pipe (with initial surface roughness of 541nm) at an optimized condition resulted in a surface finish of 56 nm. The obtained SEM (scanning electron microscopy) images of finished and unfinished surface have showed that all the scratch marks were removed and finished surface was obtained.

The Hon’ble President of India, Shri Ram Nath Kovind awarded the Gandhian Young Technological Innovation (GYTI) Award to Girish Chandra Verma, Indian Institute of Technology Delhi at the GYTI 2018 Awards function held at Rashtrapati Bhawan on March 19, 2018.

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