SU1694635A1 - Lubricant-and-coolant for mechanical working of metals - Google Patents

Abstract

The invention relates to lubricating compositions, in particular to a cutting fluid for machining metals. In order to increase the tool life, the liquid has the following ratio of components, wt.%: Dibasic sodium phosphate 0.4–0.5; sodium tetraborate 0.2 - 0.3; triethanolamine 0.7-1.0; coniferous extractO, 1-0.15; sodium bicarbonate 0.4-0.5; glycerin 1.0 - 1.5; furatsilin 0,03 - 0,05; a complex compound of calcium glgoconate and boric acid 0.02-0.05; water the rest. New fluid provides an increase in productivity by 1.06 - 1.3 times, an increase in metal removal by 1.07 - 1.14 times. provides an increase in circle durability by 12–13%. 2 tab.

Description

The invention relates to lubricating coolant (coolant) and can be used in the machining of metals, mainly in grinding.

The purpose of the invention is to increase tool life, surface finish and process performance.

For the preparation of the coolant use of disubstituted sodium phosphate (GOST 0334-49), sodium tetraborate (GOST 8429-77), triethanolamine (TU 6-02-916-79), pine extract (TU 6-15-1398-83), sodium bicarbonate (GOST 2156-79), glycerin (GOST 6259-75), furatsilin and the complex compound of calcium gluconate and boric acid (anticorrosive-2).

The compositions of the coolant are given in table.1.

For comparative tests, a composition of known coolant (composition 6) was prepared, wt%:

Dvuhzameshny

sodium phosphate 0,2

Sodium carbonate0.2

Sodium nitrite 0.51

Hexamethylenetetramine 1,15

Potassium dichromate 0.11

Triethanolamine0,9

Sodium tetraborate 0.18

Coniferous extract 0,18

Water Else (up to 100)

The tests of compositions 1-6 coolant are performed when machining a treadmill with gears with diameters of 105 and 97.5 mm. The material to be processed is 12X2HCh steel after cementation and phosphatization HRcj62-65. Processing is made

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PV abrasive circles 90 x 63 x 32 92A 25PMZ 7K5A (TU in circles according to GOST 2424-83).

Grinding modes:

Part speed, rpm 160-200

Cross feed, mm / two-way 0.005

Longitudinal feed, m / min 1-1.5

Coolant consumption, l / min 15-20

Cutting speed, m / s 37.5

The circle is edited with a diamond pencil A3 200/160 M (HS) 100% of the cutting force controlled by an ammeter installed in the machine system.

The test results are shown in table 2.

After grinding with the above compositions 1, 4, 5 and 6 of the coolant, comparative tests for corrosion resistance in a humid chamber are carried out.

On parts treated with composition 1, traces of corrosion appear after 2 months; when applying compounds 4, 5 and 6, no corrosion traces were found after 6 months of storage.

At the same time, it is possible to test if possible using composition 5 of coolant (Table 1) as a coolant when milling parts from H17G9AN4 steel under production conditions of mass production on a horizontal milling machine model 6Н82.

Compared with the known coolant based on emulsol, the proposed coolant provides an increase in tool life by 24%, while the corrosion resistance of parts increases 10 times.

As can be seen from the data of Table 2, the application of the proposed coolant provides an increase in productivity by 1.06 - 1.3 times, an increase in the removal of the metal - by 1.07

1.14 times, and also provides increased circle durability by 12-30%. The roughness of the surfaces of the parts processed using the proposed coolant is 0.08–0.12 µm, and that of the known 0.16 µm, which eliminates subsequent finishing operations.

The corrosion resistance of machined parts using the proposed coolant is more than three times higher than that known. The proposed composition of the coolant has a virtually unlimited shelf life and more than double the operational life. The proposed coolant is non-toxic, prevents the growth of bacteria and is an environmentally friendly product.

Claims (1)

Claims A lubricating fluid for mechanical treatment of metals containing water, sodium phosphate bicarbonate, sodium tetraborate, triethanolamine and pine extract, characterized in that, in order to increase the durability of the tool, the quality of the surface and the productivity of the process, the liquid additionally contains sodium bicarbonate , glycerin, furatsilin and a complex compound of calcium gluconate and boric acid in the following ratio, wt.%: sodium phosphate0.4 - 0.5 Sodium tetraborate 0.2 - 0.3 Triethanolamine 0.7 - 1.0 Coniferous extract0.1 - 0.15 Sodium Bicarbonate 0.4 - 0.5 Glycerin1.0-1.5 Furacilin 0.03 - 0.05 Complex compound of calcium gluconate and boric acid 0.02 - 0.05 WaterEverything Table 1 In all formulations, the water content is up to 100% by weight. A complex compound of calcium gluconate and boric acid. table 2