RU86521U1 - GRINDING GRINDING CIRCLE - Google Patents

Abstract

A grinding wheel containing abrasive grains, a binder and a filler, characterized in that the grinding grains have the same isometric shape.

Description

The utility model relates to the field of tool production, in particular to a bakelite bond abrasive tool, used during peeling grinding to remove the defective layer of material from workpieces after casting, forging, stamping, welding and is intended to increase the operational capabilities of peeling grinding wheels due to the use of grinding grains with a controlled form. The utility model can be used in mechanical engineering, in the metallurgical industry, in construction, in shipbuilding and other industries where peeling operations are used.

Known designs of grinding tools, including peeling grinding wheels, which include free-form grinding grains, a binder and a filler (Bakul V.N. et al. "Design fundamentals and manufacturing technology of abrasive and diamond tools": - M .: Engineering, 1984. - p. 102-144.).

A disadvantage of the known technical solutions is that for grinding wheels (including peeling), grains of arbitrary shape and, accordingly, different geometry are used. This, in turn, does not allow achieving the maximum working capacity of standard tools, since the shape of the grains significantly affects their performance indicators - metal removal rate, tool wear, grinding coefficient, quality of the machined surface of the parts.

The objective of the utility model is to increase the operational capabilities of peeling grinding wheels and grinding quality through the use of isometric abrasive grains.

EFFECT: reduced wear of peeling grinding wheels, power spent on grinding and processing roughness, as well as increased grinding coefficient.

The specified technical result is achieved by the fact that in a grinding grinding wheel containing abrasive grains, a binder and a filler, grinding grains having the same isometric shape are used, which is used to increase the operational capabilities of grinding wheels and the quality of grinding grinding.

The utility model is illustrated by drawings, in which Fig. 1 shows the design of a peeling grinding (standard) wheel with an arbitrary grain shape, Fig. 2 shows the structure of a peeling grinding wheel with an isometric shape of grains in the tool body. The grinding wheel consists of grains 1, ligament 2 and pores 3.

For experimental verification of the claimed technical solution, experimental grinding wheels were made of standard grade 13A electrocorundum, grit size 63 and 80. The abrasive compounding for the experimental wheels had a volumetric grain content of 84-87%, ligaments of 11-13%, filler 2-3 % and consisted of grains sorted by shape, as shown in table 1.

Table 1 Recipe Grain The shape of the grains in a circle 1 (standard) 63 Arbitrary 2 (experienced) 63 Isometric 3 (standard) 80 Arbitrary 4 (experienced) 80 Isometric

The obtained experimental circles were tested under conditions and on materials recommended for rough grinding. The test results are presented in table.2.

table 2 The shape of the grains in a circle Grain Performance indicators Tool wear rate Grinding coefficient Grinding power Roughness g / min % - % Tue % μm % Arbitrary 63 4.64 100.00 2.08 100.00 456.7 100.00 4.45 100.00 Isometric 63 3.02 65.09 3.47 166.87 359.7 78.77 4.05 91.02 Arbitrary 80 4.89 100.00 2.09 100.00 393.7 100.00 3.74 100.00 Isometric 80 3.45 70.55 3.28 156.69 322,4 81.88 3.49 93.38

As a result of the tests, it was found (Table 2) that wear-off wheels with isometric grains are 29.5-35% lower, their grinding coefficient is 56.5-67% higher, and the power used for grinding is 18.1- less 21.2% and a roughness of 6.6-8.9% than standard circles.

The use of isometric-shaped grains of grinding wheels in designs makes it possible to significantly reduce their wear, the power spent on grinding and the surface roughness of the workpiece, and also increase the grinding coefficient.

The advantage of the proposed technical solution is that through the use of grinding grains of the same isometric shape, the operational capabilities of grinding wheels and the quality of grinding grinding are increased.

Claims (1)

A grinding wheel containing abrasive grains, a binder and a filler, characterized in that the grinding grains have the same isometric shape.