RETRACTED: Analysis of Particle Damping Characteristics on Steel Vertical Machining Centre Column with Epoxy Reinforced Granite

Abstract

In high speed machining, performance is generally influenced by the dynamic behaviour of the machine tool structures. The machine tool structure is required to be rigid in order to remove the undesirable vibration and to improve the work piece quality. The most conventional material used in machine tool structure is cast iron which has both stiffness and dynamic characteristics to perform at varying speeds. The objective of this work is to improve damping capacity of vertical machining centre column. The damping capacity of column can be increased further by using passive damping method of ball packing. Damping capacity is a crucial factor which makes the dissipation of vibration happens at faster rate. As compared with cast iron established studies shows that epoxy granite a composite material improves damping capacity. Epoxy granite though could be a good choice for improving the machine tool performance at high speeds but is poor in static stiffness compared to cast iron. In this investigation it was observed that, the static stiffness of epoxy granite composite vertical machining centre column could be increased by using steel reinforcements. The final results reveal that, steel balls with epoxy granite provide faster dissipation time of 15ms at 70% packing ratio as compared to glass balls that showed dissipation time of 35ms. Also it was seen that, the steel balls offer the better damping capacity at optimum packing ratio of 50% mainly due to its specific gravity and mass of the balls.

Research on longitudinal vibration suppression of underwater vehicle shafting based on particle damping

“…The influence of test parameters on the cutting performance of milling cutters was discussed, an combination scheme of optimal parameter obtained, and verified it 33 . When the packing ratio of steel balls with epoxy granite is 70%, the vibration dissipation time is faster than glass balls, and the damping capacity of the steel balls at optimum packing ratio of 50% is better 34 . The optimization model of particle damping parameter was established, and the optimization of particle damping parameter and practical engineering application of vibration isolation carried out 35 .…”

Research on optimal design of vibration reduction of centrifugal air conditioning chiller based on particle damping

“…It consumes vibration energy of the system through the damping effect formed by friction and collision between particles and the container wall as well as between particles, so as to achieve the purpose of suppressing vibration of the system. (Xiao and Xu, 2021;Nallusamy et al, 2020;Zhang et al, 2020). Particle dampers are arranged flexibly and insensitive to temperature and environmental changes (Lei et al, 2018).…”