SU539064A1 - Cutting fluid for machining of metals - Google Patents

Description

one

This invention relates to coolant (coolant) used for cold working of metals, mainly for the process of honing cast iron products.

A water-based coolant, surfactant and corrosion inhibitor 1 is known.

This coolant is ineffective and does not allow to obtain surfaces with the required class of cleanliness processing.

Known water-based coolant, which includes surfactant and corrosion inhibitor 2. The coolant has a composition, weight. % Carboxymethylcellulose (CMC) 0.05-0.5 Soda ash 0.01-0.1

Water 99.94-99.40.

This coolant is ineffective in the abrasive treatment of cast iron and has weak anti-corrosion properties in relation to cast iron, poor anti-seize properties and detergency, which results in products with a low class of cleanliness of the treated surface. This set of deficiencies is due to the low colloidal properties of the coolant (surface activity, peptization, washing ability, coagulation). Therefore

in metalworking and machine-building plants, lighting kerosene is used in the honing of cast iron products. Its use leads to the deterioration of sanitary and hygienic working conditions, increased fire and explosion hazards in workshops and increased costs for the operation of coolant.

The aim of the invention is the development of a higher quality and highly efficient coolant for the cold treatment of metals, in particular a coolant with higher protective properties and stability.

To achieve this goal, a coolant based on water, soda ash and a surfactant, which as the latter contains ethoxylated tall oil and additionally contains amorphous graphite, is proposed. The hydrophilic lipophilic balance (HLB) of ethoxylated tall oil should be in the range of 7.4-12.8. The composition of the coolant, weight. %: Ethoxylated tall

oil 0.07-0.47

Amorphous graphite 0.03-0.40

Soda Ash 0.8-1.0

Vodado 100.

The proposed coolant is prepared as follows.

6% amorphous graphite from taken oil is introduced into hydroxyethylbrod (tall oil with vigorous stirring. The thus obtained modified I-waste cellulose sulfate production (ethoxylated tall oil) is introduced into previously prepared 1% solution of soda ash.

For testing but to the exploitation properties, rents 1 and 3 {tgbl. 1), kerosene and known rentora coolant composition, weight. %:

Na-KMTs0,5

Callus soda |) ram 0.1

Water 99.4.

In the process of testing the operation of honing a cast-iron cylinder b1 1, the compositions of coolant fluids prepared in tab. one.

Table 1

Experienced cutting fluids were characterized by their surface tension and penthenia. Comparative performance data.

The effect of coolant on the machine's paintwork was also determined by wetting the coolant concentrate on the painted surface of the machine. After 5 h, the coolant is removed, the surface is rubbed with a dry white thread.

graphite data are shown in Table. 2

table 2

Table 3

with snnom pressure. The coolant resists the test if there are no traces of paint or varnish left on the board. As a result, it was shown that all CO / K tested did not affect paint coatings. The formation of precipitation on the coolant are given in table. 3

elements of the machine and parts are determined by wetting the coolant with polished steel slabs 100 cm in size. The tile is dried when in the electric furnace. The coolant resists being tested if an oil layer remains on the surface or the coating is easily erased. As can be seen on this indicator, the proposed coolant is more effective.

Foaming is determined in a 500 cm vessel filled with 200 cm of coolant. At the bottom of the vessel down the tube with a hole with a diameter of 5 mm. Pass through the tube

As follows from the data operational properties given in table. 3, the proposed coolant in many respects surpasses the known coolant, and in lubricating properties (Table 4), not only the coolant based on Na-KMU, but also lighting kerosene is much more effective.

Claims (2)

1. Authorship certificateSSSR L 253285, S Yut 3/14, 1969 2. Authors' certificate USSR № 321538, S Yush 3/14, 1971 (prototype).