SU1024249A1 - Grinding disc - Google Patents

Abstract

GRINDING CIRCLE, containing channels connecting the bore with its peripheral working surface, characterized in that, in order to increase the technological efficiency of grinding by increasing the coolant flow through the channels, the latter are made expanding to the bore of the circle in a plane perpendicular to the axis rotate neither. Lg

Description

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k-. The invention relates to mechanical engineering, in particular to the processing of metals by grinding. A grinding wheel is known with cylindrical channels connecting the bore hole and the peripheral work surface, the channels are designed to supply cooling fluid to it (the coolant fluid) under the action of centrifugal forces and hydraulic pressure. The grinding efficiency is determined in particular by the intensity of cooling, which, in turn, depends on the amount of coolant supplied to the cutting zone. The amount of coolant supplied by the specified grinding wheels is determined by the number of holes and their hydraulic resistance. Increasing the amount of coolant supplied by increasing the number of holes or their cross canals is not possible due to the strength of the wheel and the need to preserve as much of its surface as possible. The disadvantage of the known grinding wheel is insufficient coolant flow through the channels. The main reason for limiting coolant flow through channels is cavitation that occurs at the inlet of the channel. The aim of the invention is to increase the technological efficiency of grinding by increasing the coolant supply through the channels. The goal is achieved by the fact that in the grinding wheel containing channels connecting the mounting hole with its peripheral working surface, these channels are made widening to the mounting hole of the circle in a plane perpendicular to the axis of rotation of the wheel. Increasing the dimensions of the inlet section of the channels in a plane parallel to the axis of rotation of the circle is not advisable due to the loss of its strength. Increasing the inlet area of the channel reduces the flow rate of the fluid, which reduces the harmful effects of cavitation and thereby increases the flow of coolant to the grinding zone under all other identical conditions, and therefore increases the technological efficiency of grinding. FIG. 1 shows the shape of the inlet of the channel; in fig. 2 is a sectional view in FIG. 1. Inside the grinding wheel 1, the channels 2 are made and extend in the direction from the peripheral (working) surface 3 to the mounting hole 4 in a plane perpendicular to the axis of rotation of the wheel. The channel cross-sectional area can vary, in particular, along a non-linear 3aBHCHModTH from its length. The grinding wheel works as follows. The coolant supplied to the internal cavity of the bore 4 of the circle 1 by means of a known device (not shown), under the action of centrifugal forces and hydraulic pressure generated in the coolant supply system, moves along the channels 2 to the peripheral (working) surface of the 3 circle. The use of the invention allows to increase the technological efficiency of grinding, to increase the durability of the circle, to increase the productivity and quality of processing.

Claims (1)

A GRINDING CIRCLE containing channels connecting the bore hole with its peripheral working surface, characterized in that, in order to increase the grinding technological efficiency by increasing the coolant flow rate through the channels, the latter are made expanding to the bore hole of the circle in a plane perpendicular to the axis of rotation. Fis. 1