The robotic grinding system for a thin-walled workpiece is multi-dimensional coupling composed of robot, spindle and the workpiece. In process, dynamic effect generated, while stimulates elastic vibration; spindle, as an electromechanical actuator, sensitive to vibration in form load fluctuations. It necessary investigate characteristics under well control system. Firstly, considering between w...

Grinding is widely used as the last step of manufacturing process when a good surface finish and precise dimensional tolerances are required. However, if grinding wheels have cracks, they may lead to hazardous working environment produce poor tolerance in machined products. Therefore, should be inspected for cracks before being mounted onto machine. In this study, novel method finding possible ...

Powder diffraction ideally requires a very large number of crystallites in random orientations to be exposed to the X-ray beam. This is obtained in laboratory instruments by grinding the sample to a very fine grain size (< 10 µm) or by using fine-grained polycrystalline solids. When non-ideal powders are being characterized, one must find a means of increasing the number of crystallite orientat...

Micro-rod YAG single crystals are the preferred laser for gain mediums with a high power. However, brittle fracture and crack damages easy to occur in grinding process of micro-rod due their large length-to-diameter ratio, brittleness, hardness. In this work, modal, frequency, harmonic response transducer under ultrasonic elliptical vibration analyzed by using finite element simulation. Then, m...

A highly efficient, chemoselective synthesis of a library of polysubstituted pyrroles and tetrahydropyridines has been achieved through the one-pot, multicomponent reactions of ethyl (E)-3-(aryl/alkyl amino) acrylates, 2,2-dihydroxy-1-arylethan-1-ones, and malononitrile under solvent- and catalyst-free grinding conditions. The selective formation of pyrrole or tetrahydropyridines relied on subs...

Editorial Hand-arm vibration syndrome: a new clinical classification and an updated British standard guide for hand transmitted vibration Raynaud's phenomenon of occupational origin known in the 1950s as "the vibration syndrome" or "vibration induced white finger (VWF)" has, in the 1980s, been renamed "the hand-arm vibration syndrome ." This occupational hazard has, since 1890, afflicted operat...