Research of new grinding grain influence on product quality

Abstract

Paper deals with possibilities of using the grinding discs with abrasive grains of electrocorundum, sintered corundum and its mixture, cubic boron nitride and diamond, in tools production. Tools are compared according to the influence of technological conditions on the cutting forces and the surface quality. It is described by arithmetic roughness. E 335GC (11600), X20Cr1 3 (19436) a 102 Cr6 (14109) materials were machined in hardened and non-hardened condition. Abrasive (grinding) material affects the size of the cutting forces and thus flexibility of technological system and the repeatability of products. High cutting forces are generated when using sintered corundum, and white electrocorundum. Due to the geometry of the abrasive grain is more advantageous to use diamond or cubic boron nitride material. The porosity of the grinding wheel also affects the resulting machine tool load and technological areas. The greater the porosity is, the lower the value of cutting forces is. Unfortunately, with the porosity increases significantly an average roughness. These grinding wheels are suitable for roughing. The higher value of porosity ensures colder cut and smaller heat affected surfaces. Surface quality, while maintaining other process conditions are best when using white electrocorundum, slightly is impaired for other abrasive materials. However, the results are not statistically significant.