Analysis of the Friction Mechanisms of DC04 Steel Sheets in the Flat Strip Drawing Test

Abstract

This article presents the use of a specially designed flat strip drawing tester in order to assess the change in surface topography of DC04 steel sheets. The flat strip drawing test simulates friction conditions in the sheet metal-blankholder interface during deep drawing processes. Experimental tests were carried out at various nominal pressures and in dry friction and lubricated conditions. Two widely available gear and engine oils were used in the study. It was found that, in the range of pressures investigated between 3 and 12 MPa, 80W-90 gear oil provided a greater reduction in the value of the coefficient of friction (COF) than 5W-30 engine oil. Gear oil reduced the COF by an average of about 13.4 [%]. The lubrication efficiency depends on the pressure values; the greater the pressure, the lower the lubrication efficiency. A lowering of the value of the main amplitude surface roughness parameters Sa and Sq was generally observed. SEM analysis showed that even under lubrication conditions there was intense flattening of the roughness asperities of the sheet metal.

Application of categorical boosting to modelling the friction behaviour of DC05 steel sheets in strip drawing test

“…However, regardless of the analyzed area of the drawpiece, in order to prevent the negative effects of friction in the deep drawing process, various techniques are used to reduce the value of the coefficient of friction (COF). The most frequently used method to reduce friction between mating surfaces is the use of lubrication (Szewczyk et al, 2022). The lubricating substances used, due to the various parameters they must meet, are selected appropriately depending on the type of oil (natural oil, mineral oil, synthetic oil).…”

The Comparison of the Multi-Layer Artificial Neural Network Training Methods in Terms of the Predictive Quality of the Coefficient of Friction of 1.0338 (DC04) Steel Sheet

“…The properties of the finished product, such as the surface quality, are mainly influenced by the friction and lubrication conditions [5]. During the deformation process, friction causes a change in the surface topography and material flow character of the deformed workpiece and a deterioration in the surface quality of the product [6,7]. About 15-25% of total energy consumption worldwide is used to reduce friction in mechanical systems [8].…”