Study On Abrasive Belt Grinding Of Titanium Alloy

Titanium alloys have more and more applications in many industrial fields especially in aeronautics and astronautics in virtue of their high specific strength, good corrosion resistance and high thermal stability. However, titanium alloys are well known as a kind of difficult to machine material, because of its low thermal conductivity, small elastic module, and high chemical activity. Abrasive belt grinding is a kind of highly effective manufacturing process. Many researchers have put their attentions on the grinding of titanium alloy with abrasive belts. In this paper, some investigations were carried out on the fundamental aspects of grinding of titanium alloys with abrasive belts, such as the grinding temperature, belts wear and surface integrity.Alumina zirconia belts and silicon carbide belts were selected in the experiment. The wear patterns of two kinds of belts were discussed. Then a comparative study on the abrasion resistance of them was done, and the effects of different grinding parameters on the abrasion resistance were achieved.Comparative experiments with belt and wheel in different machining parameters were conducted. The grinding temperature was measured by a quasi-artificial constantan-Ti6Al4V thermoelectric couple. And the influence of different parameters on grinding temperature was studied. The results showed that the grinding temperature can be effectively decreased in belt grinding. Even in dry grinding, the temperature was very low. The results of surface integrity indicated that the surface roughness of workpiece can reach 0.5μm during belt grinding. No grinding burns happened. There was no hardened layer on the surface and the metallurgical structure of the workpiece surface layer did not change much.