SU1263513A1 - Composition for making polishing tool - Google Patents

Abstract

MASS FOR THE MANUFACTURE OF POLISHING TOOL, containing phenol-formaldehyde resin, abrasive and corrosion-active filler, characterized in that, in order to improve the quality of processing, it contains ammonium chloride in the following ratio of components,%: Abrasive 59, 4-87.2 Ammonium Chloride 0.6-2.8 Phenol-Formaldehyde Resin The rest, while the ratio of the volume of ammonium chloride to the volume of the resin is taken in pre (L cases 0.02-0.20.

Description

The invention relates to the production of diamond-abrasive tools intended for the polishing of glass, ceramics, quartz, corundum and other materials used in optical-mechanical, instrument-making and other areas of industry.

The aim of the invention is to improve the cleanliness of the surface to be treated, especially optical glasses, by introducing a corrosive substance into the instrument mass, facilitating the workability of the material and ensuring the self-sharpening of the instrument.

Abrasive mass contains phenol-formaldehyde resin, abrasive and ammonium chloride at the following ratios of components, vol.%:

Abrasive .59,4-87,2

Ammonium Chloride 0.6-2.8

Phenolic Idvgidna resin. Rest

Amount of ammonium chloride to the volume of the resin is selected in the range of 0.02-0.20.

When the treated surface interacts with the tool surface, a disorganization and loosening of the thin film surface of the glass being processed occurs. As a result, a communication failure occurs in the boundary region between the film and the main mass of the material. The film thus weakened is mechanically removed with an abrasive.

As an abrasive, abrasive micro and submicropowder with a developed surface are used.

Compliance with the ratio of the volumes of the filler and the resin in the abrasive mass contributes to the self-sharpening of the tool during processing due to the destruction of the aggregates formed from the abrasive and resin during the manufacture of the tool.

Example, Preparing a tool for glass polishing, As an abrasive, use cerium dioxide and, eO-A, the grain size of the main fraction is 1/0,

Abrasive tools are prepared in the form of tablets 5 mm in the amount of 24 pieces, which are glued to a spherical cup with a radius of 6 mm and a diameter of 50 mm. The tool is tested when polishing a block of lens lenses with a diameter of 51 mm, a radius of 26.36 mm.

The tests were carried out on a grinding machine polishing machine 6ВШ-100 M. During processing, the pressing force of the tool to the part is 60 m, the number of double strokes is 100 bits, x / min, the stroke length is 45 min, the number of revolutions of the spindle is 350 r / min The nominal area of contact of the instrument with the part is 8.4 cm. Water consumption is 0.28 l / min.

The test results are presented in table, 1-3,

Thus, an instrument made on the proposed mass provides high surface cleanliness without scratches and scratches,

t a bl and c a 1

0.125

1.5

48.5

0

1.5

0.05 1.3 0.05 1.5 0.05 1.5

 Matte with individual scratches

Polished

ti

Matte (non-copied initial roughness)

table 2

Table 3

Claims (1)

MASS FOR MANUFACTURING. LIROLING INSTRUMENT, containing phenol-formaldehyde resin, abrasive and a corrosive filler, characterized in that, in order to improve the quality of processing, it contains ammonium chloride as a corrosive filler in the following components, vol.%: Abrasive Ammonium chloride Phenol-formaldehyde resin ratio 59.4-87.2 0.6-2.8 The rest while the ratio of the volume of ammonium chloride q to the volume of the resin is taken in the range of 0.02-0.20. »SU.„, 1263513