Influence of supplying the vegetable oil with minimal quantity lubrication on wear of the hob during hobbing process of the gears
In the paper, the experimental investigations on hobbing cutting of the gears with the use of cooling fluids with minimal quantity lubrication (MQL) has been presented. The experiments were prepared during milling of 42CrMo4 alloy steel at of 32 ± 2 HRC hardness using high speed steel HS6-5-2 hobs without coating. Gears have been generated made in one single pass, to the full depth of the cut. As a cooling fluid in the MQL method, the vegetable oil and synthetic mineral oil MICRO 3000 was used. During the experiment, the size of the clamping was measured on the worm blade application surface, thus determining the direct VBC wear indicator and the Fc cutting force value was recorded. Based on the obtained results, the influence of the type of used oil with MQL on the wear of the tool was assessed. The carried out analysis revealed that the use of vegetable oil in the field of assessed conditions gave better results than dry milling.
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