Příspěvek k velmi přesnému obrábění

Abstract

The submitted dissertation solves realistic requirements of industrial practice. The trend in the past few years is to reduce the ecological burden of industrial enterprises. Since 2003, the EU directive 2000/53/EG "End of Life Vehicles" has been in effect, which practically excluded the use of technologies containing hexavalent chromium in the automotive industry. Since then, environmental requirements have been tightened in other industries as well. In 2017, the European Parliament Directive (EU) 2017/2398 was signed and will be valid from 17 January 2025, which reduces the limits for hexavalent chromium compounds in the workplace a fivefold reduction. In the near future, a possible complete prohibition of technologies that generate carcinogenic hexavalent chromium compounds in industry can be predicted.

In the field of fluid technology, technologies containing hexavalent chromium are used for a wide range of products. In particular, hard chrome plating followed by grinding not only provides corrosion resistance to products but also provides surface integrity suitable for contact with sealing elements.

Surface finishing with a diamond tool is a modern production technology that can achieve similar surface integrity parameters as the most commonly used hard chrome plating followed by grinding. The aim is not to completely replace the manufacturing processes used to date, but to offer an alternative for a range of products that require low surface roughness, surface topography with self-lubricating capability. And at simultaneously do not require corrosion resistance. The aim of this thesis is to describe a not very well known technology of surface finishing with diamond tools and to establish general recommendations for the selection of the correct technological parameters.