Abstract
A special group of hybrid assisted processes termed media-assisted processes which various liquid and gaseous media supplied to the cutting zone is highlighted. Special attention is paid on such cooling techniques as high-pressure machining (HPC), high-pressure jet assisted machining (HPJAM), minimum quantity cooling/lubrication (MQC/MQL) and a group of cryogenically cooled machining including such cryogenic media as CO2 snow and liquid nitrogen (LN2). Some important effects resulting from the various cooling strategies are outlined and compared. In particular, quantitative effects concerning chip breaking, thermal and tribological behavior of the cutting process as well as burr reduction, surface quality and subsurface layer are presented. The optimization procedure concerning both energy consumption and machining costs in terms of material removal rate (MRR) is presented.
Highlights
A special group of hybrid assisted processes termed mediaassisted processes which apply various liquid and gaseous media supplied to the cutting zone is highlighted
The paper is a continuation of the author's previous publications in the monthly Mechanik [1,2,3] devoted to hybrid machining processes and its importance in modern manufacturing industry
It develops the problem of supporting the cutting process by introducing additional liquid and / or gas media into the cutting zone
Summary
A special group of hybrid assisted processes termed mediaassisted processes which apply various liquid and gaseous media supplied to the cutting zone is highlighted. For four decades failed to achieve the required progress in surface engineering of thin-film materials resistant to wear and in the early 90s began to be introduced to the industry of semi-dry machining, commonly known as machining with a minimum use of CCS (MQL - minimum quantity lubrication) as a new sustainable machining strategy. It allowed a significant reduction in the use of coolants/lubricants, but there were further barriers in improving the cutting process, such as tool life or surface quality / TSL state (technological surface layer).
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