Several Studies On Surface Roughness And The Flow Field Of Grinding Fluid For The Engineered Grinding Wheel

Due to the traditional grinding wheel abrasive in the distribution of the surface of the grinding wheel is no rule configuration,and it unable to realize the abrasive man-made control,lead to the dynamic effective abrasive which participate in grinding number decreases and the chip space on the grinding wheel surface is difficult to control,and it's easy to blockage the grinding wheel working surface,lead to the grinding wheel failure untimely and work-piece damaged by grinding heat,even normal machining is out of proceed.Besides,surface roughness with random configuration will not meet the requirements of people.To resolve the above problems has mentioned,this paper puts the phyllotaxis theory of bionics in the nature and applies in the manufacturing process of the CBN electroplated grinding wheel,and it realizes that grain space of grinding wheel are filled well and complementary through the phyllotaxis coefficient restrain grain spacing and density in the surface of the grinding wheel,it will has important meaning to the development of the engineered grinding wheel.Firstly,this paper researches the theory of grinding surface roughness with the engineered grinding wheel.Many theoretical and empirical models of surface roughness are not well applied to the wheels with orderly arrayed abrasive properly through investigation.To this issue,this paper summarizes two kinds of model of grinding surface roughness with the engineered grinding wheel.Then,in order to understand the surface quality of the grinding wheel during grinding TC4 with engineered grinding wheel,phyllotactic pattern theory is introduced into the design of the electroplating CBN grinding wheel and use UV photography as mask to realize abrasive controllable configuration on the surface of grinding wheel.The engineered grinding wheel is fabricated using UV lithography method and electroplating technology.The titanium alloy TC4 was experimented with the grinding and obtain the influence of surface roughness with random,,phyllotactic and staggered configuration ranging with the feed speed and the grinding depth.The results show that under the same experiment conditions,the grinding surface roughness value is less than other configuration.Finally,in order to understand the flow state of the grinding fluid through the grinding zone,the fluid field equations and boundary conditions of the flow field in thegrinding zone were established.By using computational fluid dynamics software(Fluent),the flow state of the grinding fluid were simulated by comparing for the grinding wheel with abrasive cluster of random,array,phyllotactic and staggered configuration.The simulated results show that the grinding fluid flows along spiral grooves of phyllotactic pattern which makes fluid flow divergence around,which is advantaged to the grinding heat conducted and abrasive chip discharged in time.Besides,by using computational fluid dynamics software(Fluent),the pressure state of the grinding fluid were simulated by comparing for different configuration grinding wheel.The simulated results show that the pressure distribution by the grinding wheel with abrasive phyllotactic pattern is uniform,which is advantaged to grinding fluid entrancing grinding zone.