Reduced Mist Generation with MicroPVM Machining Coolants.
NIOSH, 1999 Jun :1-194
An investigation has been performed in conjunction with the School of Public Health at the University of North Carolina (UNC) in Chapel Hill, NC to determine whether the addition of microencapsulated phase change materials (microPCMs) to mineral oil could significantly reduce the size distribution and concentration of mist generated during a metal machining operation. The test coolant was formulated by adding 25% microencapsulated n-eicosane particles to a low viscosity mineral oil commonly used for such studies at UNC. The results showed that addition of the microPCMs to the mineral oil did not affect the size distribution of the mist generated, but did decrease the mass of mist generated by 31% at the highest mist generation numbers. These conditions represented the experimental variables with the fastest rotational speed and deepest cut on the lathe, and the lowest coolant flow rate. The mist generation number is the ratio of the metal removal rate divided by the coolant flow rate.
Coolants; Cutting-oils; Machine-operation; Oil-mists; Mineral-oils;
NTIS Accession No.
National Institute for Occupational Safety and Health
Triangle Research and Development Corporation, P.O. Box 12696, Research Triangle Park, North Carolina