SU1595890A1 - Cutting fluid for metal-working - 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 and the quality of the treated surface, this liquid has the following ratio of components, wt.%: Treatment product at 100-155 ° C with monoethanolamine of a condensation product of turpentine with maleic anhydride 1-5

stearic acid 0.1-0.5

trisodium phosphate 0.1-0.5

water the rest. The new composition does not have a corrosive effect on cast iron and steel, the tendency to foaming and foam stability is no more than 500-700 mm. Evaluation of the stability of the emulsion showed that in 3 hours it was released 0.5-0.8%, it can work for 6-8 months without replacement. 2 tab.

Description

The invention relates to mechanical engineering technology, in particular to coolant (coolant) for the machining of metals.

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

To prepare the coolant, stearic acid, trisodium phosphate and the treatment product at 100-155 with monoethanolamine of the product of condensation of turpentine with maleic anhydride (hereinafter, this product is termed as the monoethanolamine salt of the terpenomeroline adduct) are used to prepare the coolant.

An example of the preparation and isolation of a terpenomaleic adduct (Spec. SP 13- 4203003-31-88).

The terpenomaleic adduct (TMA) is a condensation product of terpene hydrocarbons contained in extraction turpentine with maleic anhydride.

The technology for producing TMA is as follows.

In the reactor load 1.5 MAH. extraction turpentine and 1 ma.h. maleic anhydride. Slowly heat the reaction mass to 120 with a running stirrer. At the end of the reaction,; When the temperature of the reaction mass begins to decrease, steam is fed into the reactor, the temperature is gradually raised to and the product is kept for 4 hours. Then, unreacted

cl

about ate

00

with

maleic anhydride extraction turpentine. The output of TMA 80-85% by weight of loaded turpentine.

Physical and chemical properties of TMA.

TMA is a homogeneous transparent vitreous mass from light yellow to brown in color with a softening temperature of 60 ° C, an acid number of 290 mg KOH / g, and a mass fraction of unremovable substances. four%.

; Then 1 mol (252 g) of the terpenomalgin adduct is melted, 122 g (2 mol) of Hn mono-ethanols are slowly poured into the melt with constant stirring. The process temperature is 100-155 ° C. The reaction mass is stirred until cooling.

A homogeneous product is obtained, the physicochemical properties of which are given below.

This is a homogeneous transparent vitreous mass of light brown color with a softening temperature of 40-41 ° C and an acid number of 78-80 mg KOH / g.

The tests of the proposed coolant are carried out under production conditions on longitudinal shaped turning automatic machines of the type 1B10A, Sh6A. Process the detail of carbon steel A-75. The cutter material is WOL-mokobalt VK-6 alloy, the drill material is R-6 high-speed steel. Automatic turning machine. The cutting mode is 10–20 m in 1 min, the feed is 0.005–0.002 mm / rev., Hard power cutters - 5 pcs.

Automatic drilling. U12 steel drills, instrumental steel, feed 0.005 mm / rev., Speed 8-15 m in 1 min.

Table 1 shows the composition of the coolant for testing.

The test results are shown in table 2.

As can be seen from the table, 2, the proposed coolant reduces the surface roughness from 1, 25 to 1.0 microns.

All coolant compounds do not have a corrosive effect on cast iron and become inclusive. and in the interoperable period, the tendency to pricing and foam stability is not more than 500-700 mm. Evaluation of the stability of the emulsion according to GOST 6243-75 showed that within 3 hours 0.5-0.8% of the oil is released.

In addition, the proposed coolant compositions are stable without the use of special bactericides, since the terpenomaleic adduct monoethanolamine salt containing them is a bactericide. Therefore, it can work 6-8 months without replacement, has good detergency, its transparency allows observing the process.

The antimicrobial activity of the proposed coolant (META-1) was studied on standard strains of conditionally pathogenic microorganisms — Staphylococcus aureus and Escherichia coli. As a result of the experiments, it was established that the coolant META-1 has a pronounced antimicrobial activity in dilution of the drug 1: 10,000 with respect to both microorganisms.

Claims (1)

Invention Formula Cooling lubricant for mechanical treatment of metals, containing water and a product based on monoethanolamine, which, in order to increase tool durability and surface quality, in the quality of a product based on monoethanolamine, the treatment product contains 155 with monoethanolamine condensation product of turpentine with maleic anhydride and additionally contains stearic acid and trisodium phosphate in the following ratio of components, wt.%: The treatment product with 100-155 С monoethanol-amine condensation product of turpentine with maleic anhydride1 5 Stearic acid 0.1-0.5 Trisodium Phosphate 0.1-0.5 Water Remaining 0.5 I 3 5 6 1 1 I 0.1 0.1 O.J 0.1 0.1 0.3 0, S O, 0.1 0.1 0.1 0.1 0.1 0.3 0.5 0.5 0.6 five 0.5 0.5 S 6 0.6 0.6 0.6 0.6 N ote. In all compositions of Boq, 100 "" s. X. table 2