SU1532576A1 - Coolant-lubricant for metal-grinding - Google Patents

Abstract

This invention relates to cutting fluids used in grinding metals. The goal is to improve the quality of the machined surface, productivity and tool life. The liquid contains, wt%: sodium carbonate 0.16 - 0.25

sodium phosphate disubstituted 0.16 - 0.25

sodium nitrite 0.48 - 0.6

hexamethylenetetramine 0.8 - 0.15

potassium dichromate 0.12 - 0.2

triethanolamine 0.8 - 1.0

sodium tetraborate 0.16 - 0.2

pine extract 0.16 - 0.2 and water the rest. The use of a liquid reduces the surface roughness by two classes, increases labor productivity by 1.3 - 1.5 times and circle durability by 2 times. 2 tab.

Description

The image refers to lubricating and cooling liquids (LCL) used in grinding metals.

The aim of the invention is to improve the quality of the machined surface, the process performance and tool life.

For the preparation of coolant, carbonate sodium GOST 5100-73, two-substituted sodium phosphate GOST 342-77, sodium nitrite GOST 19906-74, sodium tetraborate GOST 8429-77, potassium dichromate GOST 4220-75, triethanolamine TU 6-02-916- are used. 79, hexa-methylenetetramine (urotropin) GOST 1381-82 and coniferous extract TU 6-15- 1398-83.

Coolant is prepared as follows.

Pour technical water into the tank at 20–25 ° C and add Bcie ingredients in an arbitrary sequence with stirring for 30 minutes until they are completely dissolved.

Preparing the coolant compositions shown in Table 1.

Testing Seg. 1-6 is conducted on an intra-machine tool when machining a bearing treadmill with a diameter of 105 mm. The material to be processed is steel 12x2 NNAI after cementation and phosphating. Hardness not less than 60. Processing is carried out with circles PV 80x63 "2091A 2LLMZ-7-K5-11G according to GOST 2424-83.

Grinding modes are as follows:

The number of revolutions of the part

rpm200

Cross feed

mm / dv move0.005

Longitudinal feed

m / min1,5

sd

from now on

SP

4J

Have

Coolant flow rate, l / min 15–20 Cutting speed, m / s 34.5 Circles are edited with diamond pencils A-230/200 GC according to the value of the cutting force controlled by an ammeter installed on the machine.

The test results are shown in table 2.

After ischifovaniyu with the use of coolant machined parts examined in a humid chamber for corrosion resistance. On parts treated with coolant 6, traces of corrosion were detected after 7 days, and using the proposed coolant 1-3 after two weeks of treatment, no traces of corrosion were found.

As can be seen from the data of Table 2, the proposed coolant provides a reduction in surface roughness by two classes, which eliminates subsequent finishing operations (grinding and honing), increases labor productivity by 1.3–1.5 times and durability of the wheel in 2 times.

Claims (1)

Shadow Shape Formula Cooling lubricant for grinding metals containing sodium carbonate water, disubstituted sodium phosphate, sodium nitrite and hexamethylene tetramine, which in order to improve the quality of the surface, process performance and tool life, the fluid additionally contains sodium tetraborate , potassium bichromate, tri-ethanolamine and coniferous extract in the following ratio of components, May.%: Sodium carbonate 0,16-0,25 Dsubstituted phosphate sodium 0.16-0.25 Sodium nitrite 0.48-0.60 Hexamethylenetetramine 0.8-1.5 Potassium dichromate 0.12-0.20 Triethanolamine 0.8-1.0 Sodium tetraborate 0.16-0.20 Coniferous extract 0.16-0 , 20 WaterEverything Table 1