Two-phase ironing process in conditions of ecologic and classic lubricants application

Abstract

Presented In this paper are the results of experimental investigations of the type of lubricants influence on the ironing process. For the realisation of the strip ironing test with double thinning a device was created. In the two-phase process with a maximal thinning deformation of approximately 35 %, strips of 2.5 mm-thick low carbon steel sheets were used. Side forces of 10, 15 and 20 kN were used. Sliding speed was 100 mm/min. Experimental estimates of three lubricants are presented and compared in this paper. Most important is ecologically acceptable solid dry so called single-bath lubricant. In addition, a phosphate layer with mineral oil was applied, as was mineral oil with EP additives only. The criterion for the lubricants estimates was the change in the friction coefficient during the sliding process. The applied device and test procedure enables to evaluate different influences in double phase ironing process. Also enables the clear differences between the lubricating properties of the investigated lubricants to be established.