Tribological Properties of Al-Alloy Designed for Drawing Stampings in Automotive Industry

Abstract

Unconventional machining methods, or also progressive machining methods, such as laser cutting, waterjet cutting, ultrasound machining, etc. are undergoing a very rapid development. Laser cutting machines often evaluate even 80 parameters in real time. Their advantage is the significantly higher productivity. Many values are defined by the machine manufacturer and can not be changed for a given laser. For custom laser cutting there are 2 essential parameters, adjustable depending on the process gas employed. The aim of this article is to find the setting that will reduce the consumption of process media while maintaining or improving the quality of the machined surface.

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

“…The strip drawing test is used to experimentally determine the value of the coefficient of friction existing in the flange of the drawpiece. This test involves pulling a sheet metal strip between two countersamples, most often of cylindrical (Roizard et al, 2009) or flat (Solfronk et al, 2018) shape. The parameters influencing the change of friction conditions are the countersample clamping force, lubrication conditions, sliding speed and surface roughness of the countersamples.…”

Experimental Assessment of Friction Coefficient in Deep Drawing and Its Verification by Numerical Simulation

“…There are many parameters influencing the formability: material properties [1], forming die geometry and process parameters (blankholder pressure, punch and die radii, etc.) [2], punch and die contact surface microgeometry, and the lubricant applied [3,4]. The last mentioned and the steel sheets' surface microgeometry are included in the term 'friction conditions', which describe the contact between objects from the view of tribology and they also influence the steel sheet formability [5,6].…”