Abstract
This article discusses pilot study of effectiveness of abrasive machining of the recoverable parts for cleaning cooling lubricants involved in technological processes of processing of the parts. One of the cleaning methods is a magnetic sump, which has high efficiency at relatively low cost of operation and maintenance. Laboratory tests of the magnetic sump were carried out according to a full-factor experiment, varying with certain parameters in order to identify the purity index of cooling lubricant when cleaning from mechanical impurities. Dependencies are obtained that connect the value of purity index of coolant with the technological and structural parameters of the magnetic sump. The influence of the cooling lubricant purity index in the magnetic sump on the roughness of grinded surface of the samples was revealed. The most rational parameters of the magnetic sump have been determined at which optimum surface roughness is observed when processing the engine crankshaft using cooling lubricant cleaned in the magnetic sump.
Highlights
When cutting, extruding, rolling, stamping, drilling parts, etc. often use cooling lubricants, which remove heat from the tool and workpiece and lubricate the rubbing parts
Magnetic sumps often have baffles and non-magnetic nozzles [9,10] in order to allow all contaminated flux to pass by magnetic field with a high strength
An analysis of the results allows us to establish that with a decrease in the concentration of mechanical impurities after cleaning in the magnetic sump, the parameter of surface roughness of the samples decreases from Rа = 0,8 μm до Rа = 0,2 μm
Summary
When cutting, extruding, rolling, stamping, drilling parts, etc. often use cooling lubricants, which remove heat from the tool and workpiece and lubricate the rubbing parts. Use of a magnetic field to clean cooling lubricant is most effective when the number of magnetic particles allows their forced coagulation. Magnetic forces attract magnetic particles to zones with the highest field strength, and serve to coagulate them [4]. The magnetic field inside the working chamber increases the cleaning efficiency, and reduces the mass dimensions, because coagulated particles have more weight, and they require less time for sedimentation. The advantages of the sump include the factor that it captures soft magnetic impurities. This type of magnetic sumps is most widely used as it provides high cleaning efficiency at relatively low material and energy costs. Magnetic sumps often have baffles and non-magnetic nozzles [9,10] in order to allow all contaminated flux to pass by magnetic field with a high strength
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