MM Science Journal, December 2008

Technical products and their attributes – theory and practical applications This paper has been presented at workshop applied engineering design science AEDS 2008 held in Pilsen

St. Hosnedl, Z. Srp, J. Dvorak
Keywords: Technical Product | Attributes | Characteristics | Properties | Behaviour | Values | Requirements

Any technical product – technical system (TS) and its life cycle processes need to meet many requirements. These are not only requirements concerning the TS operation functions, their parameters and connection interfaces, but also high product safety and health protection, good appearance, easy manufacture, transport, maintenance and liquidation, low price, short delivery time, and many others. The (…)

Qualitative consequences in finishing process of holes grinding into ceramics with the high power ultrasound application

Fr. Pechacek, M. Charbulova, A. Javorova
Keywords: high power ultrasound | ultrasound system | ultrasonic spindle | roughness | technical ceramics | hard machined materials

The paper deals with qualitative changes of machining of holes in ceramic materials applying by finishing conventional grinding and high power grinding. Measured and determined values of surface roughness of machining material definitely indicated the advantages of high power ultrasound application. Ultrasound grinding is the technological method of grinding useful for hard machinable materials.

Criterion C –Based evaluation of the topography of abrasive waterjet – produced surfaces

J. Valicek, S. Hloch, P. Hlavacek, M. Drzik, M. Kusnerova, R. Cep
Keywords: abrasive waterjet | surface roughness | optical measurement

In the contribution we present the utilization of criterion C for the evaluation of topography of metallic materials surfaces generated by the abrasive waterjet. The criterion C provides a realistic picture of the proportion of waviness (low-frequency irregularities) to the total number of surface irregularities. The critical value of parameter Cc = 0.66 was determined experimentally for metallic m (…)