Research to Evaluate the Effectiveness of the Diamond Disc for Grinding the Granite Surface

Abstract

The material and geometric design of the diamond disc for grinding granite surfaces is in the aspect of increased global demand for the use of granite slabs for the construction industry an important and economically justified task in the development of innovative technologies for the surface treatment of the building materials. The task undertaken to increase the quality and efficiency of machining processes by increasing the quality parameters of the finishing discs consists of evaluating the geometry of the abrasive segments and a group of materials for making flexible diamond discs formed on the synthetic binders. Polyurethane resins modified with the copper powders and quartz flour were selected for making the shields. The discs used synthetic MBD diamond powder with a grain size of 40/45 # and a concentration of 25%. In the analysis of the structural solutions, the average geometric efficiency index of the active surface of the grinding discs with a diameter of 100 mm was determined, with a kinematic load of n = 366 ÷ 960 rpm, moving with a progressive speed of 0.02 m/s and results of pilot abrasion tests made on the experimental samples of the circular diamond segments operating at the kinematic load n = 660 rpm and pressure on the surface of the 40 N disc.