SU1129225A1 - Cutting fluid for metal machining - Google Patents

Abstract

LUBRICATING LIQUID BONE FOR THE MECHANICAL TREATMENT OF METALS containing water, sodium nitrite, triethanolamine to the sulfonate additive, so that, in order to improve the performance of the process and the resistance of the cutting tool, the fluid has been applied. Alkylnaphthalenesulfonate oligomer as sulphonate additive with the following ratio of components, wt.%: 0.2-0.5 Sodium nitrite 0.5-1.0 Triethanolamine 0.3-0.7 Zthylene glycol Alkylnaphthalene2-3. phonate oligomer Rest Water

Description

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01 1.: The invention is committed to lubricating fluids (coolant), prnme. nkemsh when processing metals with diamond abrasive tools. Common cutting fluids used in metal cutting are aqueous solutions of electrolyte or mineral oils and mineral oils with different lubricants. Iest quest) 1 water based coolant with additional addition of triethanolamine, oleic acid and its salts 2j, as well as a coolant containing hydrocarbons and sodium tetraborate sj. However, these coolant fluids have inadequate emulsifying properties and, as a result, cutting properties. Also known is coolant for machining metals on the basis of water, containing sodium salt jtoro tar, sodium nitrite, borax trneethanolamine 4. The closest in composition and achievable result to the proposed one is the coolant NSK-5U for mechanical processing of metals of the following composition, wt.%: Sodium nitrite 0.3-0.6 Sodium salt of acid tar2.0-5.0 Bura0 , 2-0.5 Condensation product of phthalic anhydride with diztanolamine or triethanolamine 0.3-0.6 Waste alkaline purification of light oil products 0.8-1.2 Carboxymethylcellulose oloso 0.6-1, 0 Bactericidal supplement0, 08-0.12 Water Else However known coolant does not provide the required performance: Processing and durability of the cutting tool but. 5 2 The goal of the invention is to increase the productivity of the machining process and the durability of the cutting tool. This goal is achieved by the fact that a coolant for machining metaplates containing water, sodium nitrite, triethanolamine and a sulfonate additive additionally contains ethylene glycol and, as a sulfonate additive, alk5-snaftlene sulfonate oligomer in the following ratio of components, wt.%: 0.2 -0.5 Sodium Sodium Triztanol1-shn 0.5-1.0 0.3-0.7 Ethylene glycol Llkylnaphthalene sulfonate 2-3 oligomer Rest Alkylnaphthalene sulfonate oligomer obtained by the sulfonation of aromatic hydrocarbons (naphthal on or its derivatives contained in the light gas oil fraction 200 of COOL from catalytic cracking of crude oil, 100% sulfuric acid with subsequent condensation of the resulting aromatic sulfonic acids with formaldehyde and further neutralization of the condensation products with sodium hydroxide. The resulting oligomeric formula contains the following: where,. For the test The proposed coolant is prepared by simple mixing of the following irp-se compositions of Table 1.

Table I

For composition 1, 2, 3-5, H7,. Coolant samples 1-5 are tested in comparison with kerosene (composition 6) and coolant NSK-5U (composition 7) with honing semi-automatic mod. 3821. With diamond bars ACP-I00 / 80 M, 73-100% process cast-iron sleeves with a diameter of 24 mm and a length of 90 mm with a circumferential velocity of a Hongolov AO m / min and a reciprocating speed of 10 m / mn. Honing time 1 min. Criteria: - {and assessments of the coolant performance, the cutting capacity of diamond bars Wp (g / min), wear of bars EQ (g / min) and surface roughness Rq (µm) are accepted. Coolant is supplied to the treatment area by irrigation with a liquid flow rate of 1012 l / min. The test results are presented in Table. 2. Table Continued table. 2 0.0036 0.0093 0.0105. 1.35 0.0092 1.3 As can be seen from the data in Table 2, at Hosh-1ngovan1Sh pig iron, the coolant assumptions (compositions 1-3) showed a result. tats are superior to the well-known water coolant NSK-5u and kerosene in performance by 11-16%. At the same time, the proposed coolant reduces the specific consumption of diamonds by 1.5-2.0 and 1.7-3 times in comparison with the coolant coolant NSK-5u and kerosene, respectively, and also improves the cleanliness of the treated surface. In addition, compounds 4 and 5 (the components are contained in quantities outside the limits) do not achieve the goal.

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 Thus, the proposed coolant to reduce their consumption and otlkcheetsetsa high cutting method, the very way-i providing a high production - bars with hochiigovannuvoditelnost process.

Claims (1)

LUBRICANT-COOLING LIQUID FOR MECHANICAL PROCESSING OF METALS, containing water, sodium nitrite, triethanolamine and a sulphonate additive; and as a sulfonate additive, an alkylnaphthalene sulfonate oligomer in the following ratio of components, wt.%: Sodium nitrite 0.2-0.5 Triethanolamine 0.5-1.0 s Ethylene glycol 0.3-0.7 ® Alkylnaphthalenesulf phonate oligomer 2-3. V * Water Rest No. CD N5