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Bulk Buy Cheap Brown Fused Alumina South Africa

When analyzing friction, we should not only consider the conventional physical characteristics of the brown aluminium oxide friction factor, but also pay attention to the influence of the following factors on the friction factor: the properties of the grinding wheel and the workpiece surface, the metallurgical and chemical properties of the contact surface, the 100 grit aluminum oxide blast media contact temperature, the load type, the strain rate and the grinding fluid, etc.


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At the contact surface of punch and aluminum oxide abrasive media workpiece, there is no plastic flow in the black shadow part due to the large friction (expressed by friction angle a). The boundary line of dead zone represents the discontinuity of tangential velocity. In fact, it can be considered that these boundary lines will produce severe plastic deformation. Prander has analyzed the situation of the circular punch pressing into the 150 grit aluminum oxide metal body and drawn the slip line field.


The simple spring buffer system represents the elastic deformation of each object in the alumina abrasive grinding process. The actual cutting edge determined by the grinding parameters of the machine tool is different from the overall abrasive particles, which is represented by a ball with a known small radius (it has been pointed out that the general shape of the cutting edge can be approximately regarded as a ball relative to the 220 grit aluminum oxide grinding depth). This area is called the dead zone.


Now the above theoretical hypothesis is applied to the white alumina powder grinding process. The abrasive particles located at one end of the system rotate around the fixed center at the other end of the system. According to the above model, there are three stages in the grinding process. The equivalent diameter of grinding wheel is an abstract parameter. The second stage is ploughing stage, and each abrasive particle may have several cutting edges, resulting in the 180 grit aluminum oxide blasting media surface uplift. 


 This is the role of plough in grinding, 60 grit aluminum oxide which constitutes the second stage of grinding process. In the first stage, the cutting edge begins to contact with the workpiece surface, and the workpiece system only has elastic deformation. As the cutting edge cuts through the surface of the workpiece, so the normal force rises steadily, and the friction force and tangential force also increase steadily. That is to say, in this stage, but only rubs on the surface of the 80 grit aluminum oxide workpiece.


In the sliding stage, the brown fused alumina friction gradually intensifies and more and more energy turns into heat. When the metal is heated to the critical point and the increasing normal stress exceeds the material yield stress which decreases with the increase of temperature, the cutting edge is pressed into the plastic matrix. The plastic deformed metal is pushed to the side and front of the abrasive particles, the fine grit aluminum oxide micro edge does not play a cutting role.


Then, Tom lenov made further mathematical analysis. The equivalent thickness of brown aluminum oxide grinding layer only reflects the influence of motion parameters V and AP, and does not include the parameters related to the cutting performance of grinding wheel, such as wheel blockage in grinding, wheel wear passivation, the change of the top area of abrasive cutting edge, etc., which will have a great impact on the 180 grit aluminum oxide grinding process, further deformation occurs.


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Brown Fused Alumina And White Fused Alumina MOQ: 1 Ton! 19 Years Manufacturing Exprience, 35,000m² Workshop Area, Factory Price, Free Samples, Fast Delivery!

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