RU1383779C - Concentrate of lubricant and cooling liquid for machining metals - Google Patents

Abstract

FIELD: machining metals. SUBSTANCE: proposed concentrate contains (mass): mineral oil 20-35, product of reaction of triethanolamine with unsaturated liquid acid or with acids of tallow oil 9-16, monoethanol amine 9-13, boric acid 3-6, triethanolamine 10-18, bis-(alkylpolyoxyethylene)-phosphate having C_8-18 in alkyl radical and 2-6 oxyethyl groups 9-16, water the rest. EFFECT: increases life of cutting tool, decreases roughness of metal surface. 3 tbl

Description

 The invention relates to cutting fluids (coolant) for machining metals.

 The purpose of the invention is to increase the resistance of the cutting tool.

For the preparation of coolant, it is advisable to use industrial oil as mineral oil, for example, I-12A, GOST 20799-75; bis- (alkylpolyoxyethylene) phosphate, which is the product of the hydroxyethylation of fatty alcohols of the formula [C _n H _{2n + 1} O (C ₂ H ₄ O) _m ] ₂ POOH, where n = 8-18, m 2-6, brand Oxifos KD -6 TU 6-02-1177-79, it is advisable to use oleic acid TU RSFSR 48-725-80 as an unsaturated fatty acid.

 Boric acid GOST 18704-78, monoethanolamine TU 6-02-915-72, triethanolamine TU 6-02-916-79 and tall oil TU 81-85-26-75 were also used.

 The reaction product of triethanolamine with an unsaturated fatty acid (oleic) or tall oil acids is prepared as follows.

5 parts by weight oleic acid is loaded into a glass reactor and with constant stirring is heated to 90-95 ^about C. Then add 3 wt.h. triethanolamine and the mixture are heated at 185 ^about C for 4-5 hours (similarly prepare an emulsifier with tall oil acids).

The resulting product has the following physico-chemical characteristics:
Appearance is a dark brown, homogeneous liquid.

Kinematic viscosity
^at 50 ° C, the stop 280
Acid number, mg KOH / g 8.3
The following is an example of the preparation of a cutting fluid concentrate.

 Water, monoethanolamine and boric acid are mixed until a clear solution is obtained. Triethanolamine, oxyphos KD-6, an emulsifier and mineral oil are added to the resulting solution, the mixture is thoroughly mixed until a homogeneous product of a transparent consistency is obtained.

 For testing, coolant concentrates are prepared, are given in table. 1.

 Physico-chemical characteristics of the concentrates, compared with the known (composition 6) are given in table. 2.

 Due to the fact that samples 4 and 5 have unsatisfactory physicochemical properties, they are excluded from further tests.

 Samples of the proposed and known coolant concentrates were tested in the form of 5% aqueous emulsions during turning of parts from special high-strength cast iron (HRC 45-50) on a six-spindle automatic machine АСВ-130 with carbide plates TT 8 K6, VK6GT. The tests were carried out under the following cutting conditions: feed 0.2 mm / rev, speed 47 m / min, rotational speed 314 rpm. Tool life was measured by the number of manufactured parts meeting the accuracy requirements.

 The test results are presented in table. 3.

 As can be seen from the data in table 3, the samples of the proposed coolant provide an increase in the resistance of the cutting tool and a decrease in surface roughness.

Claims (1)

 LUBRICANT COOLANT CONCENTRATE FOR MECHANICAL METAL PROCESSING, containing water, mineral oil, a reaction product of triethanolamine with unsaturated fatty acid or tall oil acids, boric acid and monoethanolamine, characterized in that it also contains three ethanol and bis (alkylpolyoxyethylene) phosphate comprising 8 18 carbon atoms in the alkyl radical and 2 6 hydroxyethyl groups in the following ratio of components, wt. Mineral oil 20 35
The reaction product of triethanolamine with unsaturated fatty acid or tall oil acids 9 16
Monoethanolamine 9 13
Boric acid 3 6
Triethanolamine 10 18
Bis (alkylpolyoxyethylene) phosphate comprising 8 18 carbon atoms in the alkyl radical and 2 6 hydroxyethyl groups 9 16
Water Else

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