RU1815204C - Method of fabricating abrasive tool - Google Patents

Abstract

Usage: for the production of abrasive tools from superhard material. SUMMARY OF THE INVENTION: a preform is densely inserted between the two rings of abrasive-containing material before sintering from the outer and inner sides. The inner and outer surfaces of the rings are preliminarily lubricated with a colloidal graphite preparation, the ring sizes being selected from the conditions and H and h are the height of the ring and the workpiece, respectively, B is the width of the ring. Moreover, relative to the concentration (KK) of abrasive in the rings, they are taken from the condition (K3 + 100%), where Kz is the relative concentration of abrasive in the workpiece. Said rings are removed after sintering. 1 C.p. f-ls, 2 ill.

Description

The invention relates to the production of an abrasive tool from a superhard material (STM).

The aim of the invention is to improve the quality and reduce the complexity of manufacturing tools.

In FIG. 1 shows blank 1, where a is a blank placed between the inner 2 and outer 3 rings before sintering under pressure, b is blank 1 with rings 2 and 3 after sintering, c is blank 1 after separating inner 2 and outer 3 rings; in FIG. 2 - physical and mechanical characteristics: density 4 and hardness 5 of the resulting circle.

For comparison, the above characteristics are shown without an additional outer ring b and 7, respectively.

The implementation of the claimed method.

Make a circle APR 400 80 x 2. About x

X32AS15

100

80.

ate

WITH

50 M2-01. since the height of the

If h is 2 mm, then the minimum width of rings B should be 4 mm. Based on technological considerations, we take 6 mm of the width of the rings. Linking rings M2-01. and as solid particles, white electrocorundum powders (24A) are used with a grain size of 63-50 microns, a relative concentration of 100%. The rings and the billet are made by rolling the AMK with subsequent cutting, 1A1 92 x 2, 6 x 80, respectively (outer ring), 1A1 32 x 3.6 x 20 (inner ring). The contacting surfaces of the workpiece and rings are carefully lubricated with a colloidal graphite preparation. After that, the workpiece is inserted between the rings and carried out 00 SP

Yu

ABOUT

4

their solid-phase sintering under normal conditions (Fig. 1a, .5 MPa, T-7200 C, TI.5h).

After sintering (Figs. 1-6), both rings are separated from the obtained monolith (Figs. 1B). Formula 1. A method of manufacturing an abrasive tool from superhard materials on a metal bond, in which a blank in the form of a ring of abrasive-containing rolled metal is cut, placed between disks and carried out sintering, which consists in the fact that, in order to improve the quality and reduce the complexity of manufacturing the tool, they take an additional two rings of abrasive-containing material, an inner and an outer one

the rings are lubricated with a colloidal graphite preparation and one of the rings is set in contact with the peripheral surface of the workpiece and the other with its inner surface, while these rings are removed after sintering, and the ring sizes are selected from the condition and B 2h, where H and h - the height of the ring and the workpiece, respectively, B is the width of the ring.

2. The method according to claim 1, characterized in that the relative concentration (KK) of the abrasive in the rings is selected from the condition

(KZ-OSI%),

where C3 is the relative concentration of abrasive in the workpiece.

pЈ / Ј.1