Management of Manufacturing Machine Coolant Condition
Abstract
Coolants used in metal chip forming processes provide two major benefits: cooling and lubrication (Foltz, 2018). Water based machine coolants now dominate the metal forming industry (Benedicto et al., 2017). Water based coolant is a suspension of Extreme Pressure (EP) oils and other chemicals in a water base (Brinksmeier et al., 2015). Coolants have life cycle concerns including health, environmental and disposal (Canter, 2017). Managing the lifecycle of the coolant is critical. Maintaining consistent levels of parameters is the key to a predictable service life for the coolant (ASTM, 2017a). The report focused on metal chip forming processes typical of a lathe or vertical machining center at Hadady Corporation, rail division. The report examined the effect of careful control of coolant concentration and fluid level upon coolant life. Coolant pH was used as a predictor of coolant life. The report was inconclusive due to measurement system uncertainties and a limited timeline for data collection. A connection between fluctuations in coolant tank level and variation in coolant concentration and pH was revealed. The importance of achieving the target concentration at coolant changeout due to the difficulty in reducing concentration in service was highlighted. The report witnessed the recovery of pH, and reduction in microorganism growth due to restoring proper coolant concentration. The use of a digital refractometer and upgrading old lathes with an oil skimmer is recommended.
Degree
M.Sc.
Advisors
Dunlap, Purdue University.
Subject Area
Communication|Engineering|Energy|Environmental engineering|Environmental Health|Food Science|Industrial engineering|Materials science
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