SU1313678A1 - Method for preparing abrasive compound - Google Patents

Abstract

The invention relates to the production technology of an abrasive tool and can be used in the manufacture of an abrasive mass followed by the molding of special vibrating talting bodies of complex shape from it. The invention makes it possible to improve the technological properties by increasing its plasticity, to eliminate scrap during molding by introducing mineral oil and calcium stearate as a plasticizer before moistening. at a certain concentration, and as an anticomming agent, tristanolamineborate. As a result, it is possible to obtain a complex profile of increased wear resistance and cutting ability. 1 hp f-ly, 1 tab. (L co oo O5 00

Description

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The invention relates to the production of an ebrzivny tool and can be implemented, in particular, in the preparation of abrasive mass followed by the molding of special vibration-molding bodies of complex shape from it.

The purpose of the invention is to improve the technological properties of abrasive mass due to the increase in its plasticity (formability),

The proposed method is as follows.

An abrasive in the form of grains, powders and micropowders, a binder, an anti-combining additive in the form of an aqueous solution of triethanolamine borate, mineral oil with kinetic viscosity at not more than 300 cSt and calcium stearate are loaded into the container. The resulting mass is moistened, mixed, and then the mass is evacuated. When this ingredients load when the ratio, wt.%:

Abrasive material 50-70

Binder45-25

Mineral oil 1.0-1.5

Calcium stearate 0.1-0.15

Triethanolamine borate. 0.2-0.3

WaterEverything

and mineral oil and calcium stearate are taken in a 10: 1 ratio,

The use of mineral oil with kinematic viscosity at more than 30 cSt leads to a heterogeneous consistency of the abrasive mass with mixing and uneven distribution of the abrasive material in the mass. This reduces the formability of the tool during subsequent extruding or slip casting.

Calcium stearate facilitates the uniform distribution of the plasticizer - mineral oil - in the abrasive mass. Experimentally, the optimal ratio of mineral oil and calcium stearate 10: 1. If this ratio is violated, the rheological properties of the abrasive mass deteriorate — the uniform distribution of the components in it deteriorates, which leads to poor quality moldability. In addition, unlike other plasticizers, mineral oil and calcium stearate are retained in bulk and when it is evacuated, which is no

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adversely affects the formability of the tool.

Trizanolamine borate is a specific multifunctional additive: it protects the process equipment from corrosion during operation and contributes to a more uniform distribution of the main plasticizer.

10 In addition, during subsequent vacuuming, this compound is distributed in the surface layers of the mass and remains there during molding. During firing, the plasticizing additives burn out 5 to form simple substances (probably amorphous boron nitride, calcium oxide, boron oxide, amorphous carbon).

Said substances are preserved.

20 in the surface layers of the finished tool and not tightly bonded to the binder, can, when using the tool during vibratory tamping, be inserted into the surface layers of the workpiece, which leads to an increase in their wear resistance. When triethanol amine borate is introduced into the composition of less than 0.2 wt.%, The equipment is not protected against corrosion, and when this product is used in a concentration of more than 0.3 wt.%, The mixing of the mass is deteriorated.

The table presents data on the content of the components in the mass by

35 to the proposed and well-known methods, examples of the preparation of abrasive mass and tools are given, and the results of tests of a special tool made from

40 abrasive mass.

PRI me R. An abrasive material (60 wt.%) And a binder (35. wt.%) Were loaded into the container for preparing the abrasive mass. Then, technological additives, wt.%, Were loaded: industrial oil (I-12), 1.2 wt.%, Calcium stearate, 0.12 wt.%, And triethanolamine borate, 0.25 wt.% -.

Then, water was added as a humidifier (3.43% by weight). After that, the loaded mass was mixed, evacuation at 1.5 atm for 20 min, the granules were formed, dried and fired.

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Claims (1)

1. A method for preparing an abrasive mass in which a tank of po3. 13 consequently, an abrasive, a binder, an anticommuting additive in the form of triethanolamine compounds is loaded, the resulting mass is moistened, and then mixing is carried out, characterized in that, in order to improve the technological properties of the mass by increasing its plasticity, mineral oil with kinematic viscosity at 100 ° C not more than 30 cSt and calcium stearate, and an aqueous solution of triethanol is used as triethanolamine compounds. Abrasive material St. Zukelzee Mineral oil viscosity more than 30 cSt Calcium Stearate Triethanolamine Water Abrasive material Binder Min.oil viscosity less than 30 cSt Calcium Stearate Triethanolamine Water Abrasive material 784 the amine borate, then vacuum the mass, and the mass ingredients are selected in the following ratio, wt.%: Abrasive grain. 50-70 Binding25-45 Mineral oil 1.0-1.5 Calcium stearate 0.1-0.15. Triethanolamine-borate 0.2-0.3. Waters Others 2, The method according to claim 1, 1 and 2, and with the fact that mineral oil and stellate kalysh are taken in a ratio of 10: 1. 0.5 26,8 1.2 0.1 43.8 0.4 1.5 0.15 37.3 1.5