Dry grinding of Al-SiCP composite with large downfeed by indigenously developed patterned diamond wheel
Date18th Jul 2023
Time04:00 PM
Venue Offline mode, MES Seminar Hall, Ranganathan Building
PAST EVENT
Details
Aluminium being soft and ductile in nature, is one of the challenging materials to grind in industrial practice. Furthermore, load-free grinding of Al-SiC composites has been the most daunting task for many of the researchers with the available tools. In the present work, the feasibility of grinding of Al-SiC particulate composite by an indigenously developed single-layered brazed diamond grinding tool having uniformly arranged abrasive grits has been investigated. The experiments were carried out in reciprocating surface grinding mode without providing any crossfeed. Dry grinding was performed with increasing order of downfeed up to 30 μm at two different grinding velocities of 30 and 40 m/s and table feed of 2 and 5 m/min. Cutting forces, specific grinding energy, and roughness of the ground surface at different cutting depths were studied to analyse the grindability of Al2124-17SiCP composite, which is, as such, known to be a sticky-abrasive material. There was no sign of wheel loading, but a hint of mechanical chip adherence on grit tips was noted at higher down feeds. Although such abrasive machining was realized without any trace of wheel loading, surface roughness was recorded to be unfavourably high due to fewer overlapping cuts and non-participation of passive grits. However, it was observed that roughness could be improved significantly with the application of suitable crossfeed. The work has been further extended by developing a bigger diameter patterned diamond wheel for high MRR grinding applications, which was successfully tested under aggressive grinding conditions to machine Al-SiCP composite blocks up to a depth of 2.5 mm under flood cooling environment on a CNC machining centre platform.
Speakers
Mr. Trilochan Prasad Nanda (ME17D003)
Department of Mechanical Engineering