SU852526A1 - Mass for making abrasive tool - Google Patents

Description

The invention relates to the manufacture of an abrasive tool.

A known abrasive mass used to make an abrasive tool and containing the abrasive itself, an organic binder, and a dry colloid-graphite preparation 1.

The latter is a plastic antifriction material to which the binder has excellent adhesion and provides the tool with high quality of the surface to be treated.

The drug is prepared from artificial or natural graphite. It is a highly dispersed low-ash (ash not more than 1-2%) dry (moisture not more than 0.3%) product consisting of particles of colloidal size classified in a narrow range.

In the manufacture of small diamond tools of the type of superfinishing bars from the indicated mass, insufficient mechanical strength of the bars is observed, which is associated with a low (less than 25% by volume) dry colloid-graphite preparation content.

The purpose of the invention is to increase the mechanical strength of superfinishing bars.

For this, the components of the mass are taken, in the following ratio, vol.%

Abrasive6.25-50

Dry colloidal graphite preparation 25.0-50.0

Organic binder Rest 5 If earlier out of 50 bars more than 30 broke during adjustment and in the initial period of work, then the proposed quantitative ratio of the dry colloid-graphite preparation in the abrasive mass makes it possible to reduce the number of failed superfinishing bars with a cross section of 0.8x1.2 mm up to 6 pcs.

With the introduction of the drug in an amount in excess of 50 vol.%, The mechanical strength of the bars decreases.

As an abrasive can be used: diamond, elbor, other abrasive material, or mixtures thereof, for example a mixture of diamond with elbor.

20 The organic binder may be thermosetting or thermoplastic resin, for example, phenol formaldehyde.

A mass consisting of the listed components is obtained by mixing them in a mixer of any type that ensures a uniform distribution of the particles of the components in the bulk of the mass.

The resulting mass is poured into the mold, then subjected to the formation at 30 heat. Pressing is carried out during the draft

600 kg / cm, temperature 180 ° С and exposure 15 min.

The technical and economic effect of the invention will be expressed in increasing tool life.

Claims (1)

Invention Formula An abrasive tool mass, containing an abrasive, an organic binder and a dry colloid-graphite preparation, characterized in that, in order to increase the mechanical strength of the superfinishing bars, the mass components are taken in the following ratio, about.%: Abrasive6.25-25.0 Dry colloidal graphite preparation25.0-50.0 Organic binder Rest Sources of information taken into account in the examination 1. Technological instruction number 5, OI-72, 1972, TZAI.