Before starting the production forming processes require real experiments in order to accurately define forming limits. For this reason and due to the fact that incremental forming technology requires relatively long production time, autonomous on-line system for fracture identification is developed. The system represents a versatile tool for the identification of location and time of the fracture occurrence without human influences and their presence. The system is based on the investigation of the forming forces, responsive to very small variations, appearing during the forming process.
COBISS.SI-ID: 10919195
In order to improve the accuracy of abrasive water jet (AW) machining the precise value of the jet diameter has to be known. That is why a measuring device consisting of a load cell and a wear resistant probe was developed. The device measures the force of the jet while it passes over the edge of the probe. If the feed rate of the jet is constant and the time needed for jet to pass is known, the diameter can be determined.
COBISS.SI-ID: 10980635
In order to produce fermentation broth for downstream recovery, a total of 15 fermentations were done in a 15 m3 and two 7.5 m3 vessels. The focus of the fermentation study was therefore directed to obtain information on broth rheology, heat transfer aspects and considerations. Broth rheology was found to deviate from Newtonian behavior with increasing biomass concentration. Using axial flow impellers, rather than radial flow producing Rushton turbines, significantly improved heat transfer in this study.
COBISS.SI-ID: 33809925
The paper describes comparison of two single point incremental forming processes - conventional ones with rigid too and innovative concept where the tool is substituted with a high velocity water jet (WJ). The WJ concept is innovative and first presented to the world scientific community.
COBISS.SI-ID: 10835227
Development of a new sheet-metal-forming technology in a digital environment demands accurate mechanical properties and forming limits of the selected material. Determination of forming limits for thin sheets and foils is presented. Implementation of the Marciniak procedure with strip-shaped specimens defining the left-hand side of the forming limit diagram results in tearing outside the observed area of the specimen. Therefore, new shapes of test pieces were designed with a strip-shaped central area and enlarged outer areas, which were in contact with the die during the forming process.
COBISS.SI-ID: 11002907