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This paper reviews the experimental evidence for what is the nature of the friction contact between chip and tool during continuous chip formation and the historical development of friction models. It considers three separate circumstances of turning: at low speeds when lubricants can reduce friction by partial penetration of the chip–tool contact; at high speeds when thermal softening can provide...
Effects and mechanisms in minimal quantity lubrication are investigated by use of an intermittent turning process. Especially a difference between minimal quantity lubrication (MQL) and MQL with water is inspected in detail to elucidate boundary film behaviour on the rake face. In order to obtain a good cutting performance by MQL it is considered that two things are needed: (1) an appropriate lubricant,...
This paper is concerned with the sliding contact of a finger tip over rough glass surfaces. It reports measurements of how the roughness affects a person's feelings caused by the sliding when the person believes the glass to be intended to be used for cosmetics' packaging. The main purpose has been to gain experience in design of surface touch experiments, self-report data collection and multi-variate...
The wear characteristics of five kinds of sintered high speed steels, which contain MnS, TiC and CaF 2 additives, have been investigated at 600 o C. The results show that the MnS, TiC and CaF 2 additives greatly affect the wear of the steels, and that TiC can improve the wear resistance of the steels. There is also evidence that, at elevated temperature, a thin molten layer...
The grinding surface in magnetic fluid grinding (MFG) was originally created by embedding initially loose grits into a metal grinding shaft. Developments have included replacing the magnetic fluid by a cheaper, viscous, non-magnetic fluid, and loose grit/metal shafts by pre-manufactured resin-bonded or electro-plated diamond grinding surfaces. This paper reports grinding rates and grinding ratios,...
Friction behaviours of sintered high speed steels containing TiC, CaF 2 and MnS additives and lubrication mechanisms of these additives have been investigated at sliding conditions at 600°C. Results shown that these additives strongly affected friction behaviours of the sintered high speed steels. Ceramic carbide TiC, as a bonding agent and enhancement phase, bonded the solid lubricant CaF...
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