Experiments on Moisture Squeezing from a Leather Semi-Finished Product

The paper presents the results of experimental studies of manufacturing process of moisture squeezing from a wet leather semi-finished product. The effect of the multiplicity of leather semi-finished product passage between the squeezing rolls is determined. The effect of manufacturing factors, such as passage velocity, clamping force of the rolls and the multiplicity of leather semi-finished product passage between the squeezing rolls, on the wringing process is experimentally determined. The dependence of moisture amount removed from the leather semifinished product on the velocity of its passage between the squeezing rolls under pressure intensity is established.

Umformsimulation und -versuch von gelöteten Rohren aus Stahl und Aluminium/Hydroforming of Tailored Hybrid Tubes

Die Fügestelle ist der schadensanfälligste Bereich an einem hybriden Halbzeug in der Innenhochdruckumformung. In realen Prozessen würde daher eine Umformung an der Fügestelle verhindert werden, um einer Schädigung vorzubeugen. Eine bessere Kenntnis des Umformverhaltens trägt dazu bei, den Aufwand bei der Auslegung zu reduzieren. Zu diesem Zweck sollen in dieser Studie die Umformeignung der Werkstoffpartner simulativ und die Umformeigenschaften der Fügestelle des hybriden Stahl-Aluminium-Halbzeug.   The joint is the weak point at a hybrid metal semifinished product in tube hydroforming. In real forming processes, a deformation at the joint would be prevented in order to avoid failure. A better knowledge of the forming behavior enables to reduce the effort in process design. Thus, this study investigates in hybrid material combinations and the forming behavior of the joint area regarding their suitability for tube hydroforming.