Study On Grinding Performance And Abrasive Wear Of Titanium Alloy Hollow Ball Belt

Titanium alloy has been widely used in the national defense high-tech field,especially in the manufacture of key components such as aero-engine blades and integral blade discs,because of its excellent comprehensive properties such as small specific gravity,high specific strength,good heat resistance and corrosion resistance.Titanium alloy blade is a kind of difficult material to process.Because of its cold grinding characteristics,sand belt grinding has advantages in the processing of titanium alloy blade.However,due to the limitation of the abrasive resistance of sand belt,it is faced with the problem of sand belt propagation and belt change in the processing,resulting in low processing efficiency and unstable processing quality,which makes it difficult to realize intelligent manufacturing requirements.Therefore,this article in view of the aircraft engine titanium alloys blade grinding medium sand with the problem of insufficient service life,using a new type of hollow ball abrasive belt as a breakthrough point to carry out related experimental research,analysis of the abrasive belt grinding and abrasive wear performance problems,for aeroengine titanium alloys blade of high quality,high efficiency grinding provides guidance,the concrete research content is as follows::(1)The finite element software Abaqus to under different grinding parameter conditions combination alumina hollow ball to simulation modeling process of abrasive belt grinding of titanium alloy plate,the abrasive abrasive,grinding pressure,feed speed and the influence law of grinding speed on the material removal rate,as the subsequent hollow ball abrasive belt grinding of titanium alloy plate level set of grinding parameters and single factor experiments,the grinding pressure and grinding speed to the simulation analysis,the influence of grinding force for subsequent grinding parameters on the abrasive wear experiment level set of grinding parameters and provides the basis.(2)Carry out experiments on grinding titanium alloy plate with alumina hollow ball sand belt,analyze the influence of technological parameters on surface roughness and grinding ratio of titanium alloy plate with alumina hollow ball ceramic sand belt by single factor experiment,and determine the reasonable range of grinding parameters of titanium alloy hollow ball sand belt;Then through orthogonal experiment research of grinding pressure,linear velocity,feed velocity and grinding abrasive size and other factors on the surface roughness and grinding than the impact of primary and secondary relationship,determine the hollow ball abrasive belt grinding,the optimal process parameters combination of titanium alloy,an analysis of the surface of the plank after processing,finally the orthogonal experiment of silicon carbide hollow ball abrasive belt,through the comparative analysis of two kinds of abrasive belt surface roughness and grinding is good or bad to comparing the two kinds of abrasive belt grinding performance,determine reasonable grinding order.(3)On the basis of the above experiment by detecting the alumina hollow ball abrasive belt wear surface morphology,after the analysis of the sand belt worn form,using fractal dimension defines the sharpness of the belt,and gives the material removal capacity and efficiency(RAE)to represent the abrasive belt since the sharpness,explore the grinding pressure,abrasive belt linear velocity of hollow ball particles from the influence law of sharpness.The comparison experiment with the traditional alumina sand belt was carried out to verify the grinding effect and self-sharpness of the hollow ball sand belt.Finally,the process experiment of grinding the inlet and exhaust edges of the titanium alloy aeroengine precision forging blade was carried out to verify the grinding effect of the hollow ball sand belt in the actual machining of titanium alloy blades.