SU1100299A1 - Cutting fluid for grinding and honing metals - Google Patents

Abstract

FANTASTIC REFRIGERATING LIQUID FOR METAL GRINDING AND HONGING, containing water and sodium phosphate tripoly, is distinguished by the fact that, in order to improve the performance, durability of the tool and the quality of the surface being treated, the liquid additionally contains sodium nitrite, copper sulfate, hexamethylentetramate, and the quality of the surface to be treated, the liquid additionally contains sodium nitrite, copper sulfate, hexamethylentetramate, and the quality of the surface to be treated, the liquid additionally contains sodium nitrite, copper sulfate, hexamethylentetramate, and the quality of the surface to be treated, the liquid also contains sodium nitrite, copper sulphate, hexamatetramite, and the quality of the surface to be treated, the liquid additionally contains sodium nitrite, copper sulphate, hexamethylentetramate, and the quality of the surface to be treated, the liquid additionally contains sodium nitrite, copper sulfate, and the substrate, and the quality of the surface to be treated, the liquid also contains sodium nitrite, copper sulphate, and the substrate, and the quality of the surface to be treated. alcohols fraction with the number of moles of ethylene oxide 8-10 in the following ratio of components, wt.%: Sodium nitrite 0.2-0.3 Sodium tripolyphosphate 0.5-1.0 Copper sulfate 0.0005-0.0010 Hexamethylene etramin 0.15-0.25 primary polyoxyethylated fatty alcohols fraction: - s (L with the number of moles of ethylene oxide with 8-100.2-0,5 VodaOstalnoe

Description

1HE

CO with

The invention relates to the machining of metals with a diamond abrasive tool and can be used in grinding and honing parts made of hardened steels that are sensitive to thermal effects and prone to the formation of burns.

A water-based lubricating lubricant (coolant), used in honing metals and containing triethanolamine, tetraborate sodium, sodium nitrite, tetrasodium salt N-octadecyl-K-sulfosuccinyl-aspartic acid (aspar.al F) 1 7 "

Coolant compositions for grinding titanium and high-speed grinding Metsshlov are also known, containing sodium nitrite, soda ash, triethanolamine oleate, potassium iodide, glycerol, trisodium phosphate 2, or silt; sodium nitrite, triethane. olamine, sodium salt of sulfonated oil, non-ionic wetting agent, and chlorinated paraffin I3J.

These coolants are quite effective in processing metals of low and medium hardness (HRC up to 45 52) or of such specific materials as titanium alloys. When grinding and honing parts made of steel with a HRC hardness of more than 60, possessing an increased sensitivity to thermal effects, these cutting fluids are ineffective, as their wetting, detergent and protective properties, as well as penetrating ability, are insufficient. As a result, the efficiency of the processes is not high enough and the requirements imposed on the quality of the surfaces to be treated (in terms of the formation of burns) and the durability of the tools are not met.

The closest to the present invention is a coolant for diamond processing of mate- rials (for honing and grinding) of the following grade ± 4, wt.%:

Sodium tetraborate. 0.1-0.3

Sodium tripolyphosphate 0.05-0.2

Hydrofluoric acid

acid0.005-0.015

Triethanolamine 0.1-0.3

Boric acid 0.6-1.0 Water - Else However, when treating said coolant, steel hardened parts with high hardness and high thermal conductivity, where besides the cooling effect, lubricating effect of coolant to improve heat removal from the tool’s contact zone with the part is not ensured Require productivity, tool life and surface finish.

The aim of the invention is the development of coolant, which provides an increase in productivity, tool life and surface quality during diamond processing of hardened steels that are sensitive to thermal effects and prone to forming.

The goal is achieved by the fact that the coolant for grinding and honing, containing water and sodium tripolyphsfat, additionally contains sodium nitrite, copper sulfate, hexamethylenetetramine and polyoxyethylated primary alcohols fraction .- with the number of moles of ethylene oxide 8-10 in the following ratio of components, wt. %:

Sodium nitrite 0.2-0.3 Sodium tripolyphosphate 0.5-1.0 Copper sulphate 0.00015-0.0010 Hexamethylenetetramine 0, 15-0.25 Polyoxyethylated primary fatty alcohols fraction

- 1 18 moles of ethylene oxide 8-10,.

0.2-0.5 Else Water

As psiloxyethylated primary fatty alcohols of the QIO fraction With a chv number of moles, ethylene oxide 8-10, it is advisable to use the product syntanol DS-10 (TU614-577-77).

In the preparation of coolant, all components are mixed in water at 30-50 ° C until they are completely dissolved.

Table 1 shows the compositions of the proposed coolant.

1; table 1

Sodium nitrite 0.2

Sodium tripolyphosphate 0, 5

0.25

0.20

0.3

0.75

1.0

0.60

Hexamethylenetetramine

Sintanol DS-10 Water

We offer formulations coolant 1-4 experience in comparison with the known coolant (composition 5), which has the following composition, wt.%:

Sodium tetraborate 0.3

Sodium tripolyphosphate 0.2 hydrofluoric acid

acid, 015

Triethanolamine 0.3

Borna acid1 0

WaterUnder 100

Coolant 1-5 recipes are tested on diamond honing and abrasive grinding or hardened parts. ,

In the first case, the tests were carried out on a vertical honing machine model ZN84 with diamond honing cylinder sleeves of U8-6M mud pumps. The material of the sleeves is steel 70, the diameter of the holes to be machined is 130-200 mm, the length is 600 mm. The surface of the holes hardened with HDTV hardness HRC more than 64.

The treatment is made with diamond bars ABX 150-16-6-3 DIA-250/20 MSMR 100%.

Processing mode:

Rotation speed

heads, m / min 40

longitudinal speed

displacement, m / min 15

Specific pressure

kg / cm 10

During the grinding operation, the tests were carried out on a ZA164 circular grinding machine when grinding a cold-rolled steel roll, barrel diameter 400 mm, length 1500, mm, hardness Hs more than 95. A circle with characteristic ZZ40SM2 of size 500x50X 303 mm was used.

Grinding mode at the rough stage:

Continued table. one

0.15 0.23 0.20 0.20 0.20 0.50 0.35 0.30 Up to 100 Up to 100 Up to 100 Up to 100

Circle rotation speed, m / s

30 27 50 500

Speed revolutions rpm Transverse feed mm / stroke

Longitudinal feed mm / min

five

In both cases, coolant is supplied to the treatment area by irrigation through the machine system.

The results of comparative tests of the operational and technological properties of the coolant are given in Table. 2 and 3.

table 2

35

40

45

50

55

60

Continued table. 3

As can be seen from the table. 2 and 3, the proposed coolant provides an increase in productivity by an average of 10-20%, increasing wear resistance

diamond bars up to 50% and abrasive wheels up to 30%, reduction of surface roughness by 20-30%, elimination of burn marks on the surface being treated

The proposed coolant is non-flammable, non-toxic, does not corrode metal, is durable in use, does not salt the bars and circles, is transparent and colorless, and allows you to observe the process.

Thus, the proposed coolant can be effectively used in honing and grinding hardened parts.

Claims (1)

LUBRICANT-COOLING LIQUID FOR GRINDING AND HONING OF METALS, containing water and tripoly sodium phosphate, it is clear that, in order to increase productivity, tool durability and surface finish, the liquid additionally contains sodium nitrite, copper sulfate , hexamethylenetetramine and poly-ethoxylated primary fatty alcohols of fraction C ₁₀ -C ₁₈ with the number of moles of ethylene oxide 8-10 in the following ratio of components, wt.%: Sodium nitrite 0.2-0.3, Sodium Tripolyphosphate 0.5-1.0 Copper Sulfate 0.0005-0.0010 Hexamethylenetetramine Polyoxyethylene primary fatty alcohols fraction C, _o - C, with the number of moles of ethylene oxide 8-10 Water 0.2-0.5 The rest. 1100299