Ultrasonic Vibration Belt Grinding Technology On Complex Flow Pool

With the development of science and technology,hard brittle materials get more attention for their unique advantages.For example,ceramic material having the high temperature resistance is widely used in aerospace,single crystal silicon having the unidirectional conductivity is applied to the production of integrated circuits,diamond material having the high hardness and wear resistance is mainly used for cutting metal materials.Quartz glass is a typical hard brittle material,the high transmittance make it to optical lenses,the medical flow pool and other cavity products are mostly manufactured by quartz glass.In this paper,based on the advantages and disadvantages of the various machining methods of quartz glass,and the easily generating coupling phenomenon of way of two-dimensional ultrasonic vibration,the method of separating two-dimensional ultrasonic vibration open-type abrasive belt grinding is selected to machine quartz glass.According to the trajectory equation of abrasive grain analysis and simulation the abrasive path,and research the removal mechanism of the material;Theoretical analysis of the phase difference of two-dimensional ultrasonic vibration,when the phase difference is p2/,abrasive particles and quartz glass have larger material removal rate,and the quartz glass is more easily in the plastic removal stage;According to the each processing parameters,establishing the material removal model,and increasing the grinding depth and feed speed lead to the increasing of grinding thickness;the amplitude of the elliptical vibration increasing and the grinding thickness decreasing;the grinding thickness of abrasive grain tends to be stable with excessive increase of radial amplitude;determined the abrasive belt speed by abrasive wear and abrasive grain;analyzing material volume of single ultrasonic vibration of belt,surface roughness and the effect of chip-hold,abrasive grain number is 600#,selected the water based grinding fluid.According to the kinetic equation,design and simulated analysis the ladder-typeamplitude transformer,rectangular block and the cylindrical tool,simulation analysis and optimizing the composite amplitude transformer after installation,measurement vibration frequency and output amplitude,the measured frequency is very close to the theory frequency proving the rationality of design,also output amplitude is the largest at the resonant frequency,and vibration frequency increase with power,increasing or decreasing vibration frequency decrease output amplitude.Measured two dimensional elliptic synthesis of the amplitude.Two directions amplitude can be well composed to an ellipse with a phase difference of p2/.For other phase difference,collected points are more intensive along with phase difference far from p2/,got narrower ellipse,therefore,the experimental results are consistent with the theoretical results.Design and construct the overall grinding test platform,selecting the value of each machining parameter according to the established the material removal model and the critical cutting thickness value of quartz glass,and carrying out single factor experiment,measurement surface roughness of quartz glass after grinding,According to the experimental results,the surface roughness increases with the grinding depth and quartz glass feed speed increasing,grinding depth and quartz glass feed speed increasing are more likely to lead to quartz glass brittleness removal,and the increasing amplitude of anyone will reduce the surface roughness,the effect of tangential ultrasonic vibration on surface roughness is better.