In this paper the macro-mechanism of Abrasive Water Jet (AWJ) cutting is studied from the point of cutting front and striation formation analysis. The striation on the surface cut with AWJ is a characteristic phenomena which is strongly present when cutting with high traverse velocities for particular material type and thickness of workpiece. The connection between the cutting front step formation and striation formation is explained through series of experiments, which include visual observations of cutting transparent material.
COBISS.SI-ID: 10444571
Nowadays different components must be produced in very narrow tolerances, the number of non-satisfying ones is limited to some tens parts per million, the final goal is oriented towards zero-defect production. To fulfil these preconditions the forming processes must be well understood. The paper discusses a possibility to improve and stabilize the quality of products by permanent process stability control and by positioning these processes in stable parts of technological windows.
COBISS.SI-ID: 10081819
This paper presents the finite element analysis of deep drawing of tinplate rings with ABAQUS program in order to analyse the phenomenon of the stretcher strains on an industrial case study. Numerical results were compared with the measured deformation of the stamped part. Finally the geometrical part optimisation was implemented in order to reduce the area with stretcher strains to a technologically attainable minimum.
COBISS.SI-ID: 9891355
The dimensions and mechanical properties of metal injection moulding (MIM) products are influenced by the feedstock characteristics, the process parameters of injection moulding, as well as the debinding and the sintering. The mechanical properties primarily depend on the sintering density and the microstructure. However, the process parameters of the injection moulding must not be neglected. The present investigations were focused on the influence of the main injection moulding parameters and the sintering conditions.
COBISS.SI-ID: 614058
In presented work a research of the flow forces impact on dynamic characteristics of hydraulic servo valve and on his flow capacities. Namely the necessary forces for hydraulic valve controlling depend upon stationary axial flow forces in valve and increase with volume flow growth of oil through valve and pressure difference. Results of research enabled enlargement of dynamic and flow apacities of valve and reduced the necessary control force on valve piston at reduced consumption of energy at the same time. used for controlling of smaller valves and they consume less electrical energy.
COBISS.SI-ID: 10449691