In order to obtain the necessary shape of long panels and sheaths, aircraft industry successfully uses a complex technology shaping. Grinding, as an operation in technological process, is provided after shot-peen forming before hardening. It designed ensure that roughness final aerodynamic surface meet requirements established by drawing part. To implement this technology, special installation ...

surface roughness is a significant parameter which determines the efficiency of optical components. surface damages induced by grinding strongly influence the mechanical strength and optical quality of optical glasses. it is meaningful to rapid evaluate the surface roughness through the measurement of different grinding parameters. in this study, a cup diamond wheel (d64) is used in grinding pr...

Multi-axis CNC abrasive belt-grinding machine is an essential piece of equipment for processing the turbofan engine fan blades. The quality blades determines whether performance can be further improved. As one important means to ensure blade quality, measurement still in stage manually hand-held measurement, and it urgent introduce digital intelligent improve this situation. In order make overa...

Aroma recovery as determined by solid phase microextraction-gas chromatography-mass spectrometry (SPME-GC-MS) was compared in coffees resulting from conventional grinding processes, and from wet grinding with cold and hot water. Freshly roasted coffee as well as old, completely degassed coffee was ground in order to estimate the relationship of internal carbon dioxide pressure in freshly roaste...

BACKGROUND There are numerous factors including physical, biomechanical, and individual that influence exposure to hand-transmitted vibration (HTV) and cause variability in the exposure measurements. Knowledge of exposure variability and determinants of exposure could be used to improve working conditions. We performed a quasi-experimental study, where operators performed routine work tasks in ...

Due to complex geometry and movement involved in continuous generating gear grinding, the grinding worm wear characterization is different from that regular processes. Grinding evaluation with accumulated removed material volume was investigated through status evolution experiments. By changing parameters orthogonal experiments, surfaces various their resulting surface roughness were obtained. ...

The mechanochemical preparation of highly functionalized 3,5-disubstituted hydantoins was investigated in the presence of various poly(ethylene) glycols (PEGs), as safe grinding assisting agents (liquid-assisted grinding, LAG). A comparative study under dry-grinding conditions was also performed. The results showed that the cyclization reaction was influenced by the amount of the PEG grinding a...

Due to the great expansion of woodworking, profile tools manufacturing has become current and in demand. In wood industry there are two large groups tools: rotary spindle milling cutters that can be or flat. The technology making requires, apart from cutting, turning, milling, 5-axis grinding operation is performed on a CNC machine with A'OXYZC configuration.It very complex kinematics high cost...