SU1532574A1 - Lubricant for abrasion working of metals - Google Patents

Abstract

The invention relates to process lubricants that can be used in abrasive machining, in particular for belt grinding of metals. The goal is to increase the productivity of the grinding process by increasing the cutting ability of the sanding belt and improving the quality of the machined surface by reducing the roughness. The lubricant contains, in wt%: azodicarbonamide or paraurethylanophenylsulfonyl azide 10-20, low molecular weight polyethylene 10-15, mineral oil 10-15, and the rest with stearic acid. The use of a lubricant makes it possible to reduce the roughness of the treated surface by a factor of 1.5 and to increase the cutting ability by a factor of 1.55 compared with the known lubricant. 2 tab.

Description

The invention relates to process lubricants that can be used in abrasive machining, in particular for belt grinding of metals.

The aim of the invention is to increase the productivity of the grinding process by increasing the cutting ability of the grinding belt and to improve the quality of the treated surface by reducing the roughness.

For the preparation of the lubricant, stearic acid GOST 6484-64, low molecular weight polyethylene H1SHE-1 grade TU6-05-1837-82, mineral oil (spindle) GOST 1642-75, azodicarbonamide (porofor CHHZ-21) TU6-03-408-80 are used and paraurethylanphenylsulfonyl azide (porophore CHP-5) TU 84-394-73.

Azodicarbonamide or paraurethylaminophenylsulfonyl azide offered as an additive to the organic blowing agent has a gas-creating capacity of 270 cm, i.e. at 4-170 ° C and above, each gram of this compound releases 270 cm of gases.

Upon contact of the grain with the surface to be treated. High temperatures develop in the working area, i.e. sanding pads are exposed to temperatures up to + 300 ° C. Under the action of these temperatures, the organic gas forming agent disintegrates, and the products released, mainly gases, contribute to the removal of heat from the cutting zone. :

cl

with

1C

cl

sl

four

In addition to the gas phase, consisting of uta, carbon dioxide, ammonia and carbon dioxide in the contact zone at

but;

Oi

The decay of these compounds is | Urazole, formaldehyde, hydrazodicarbonamide, cyanuric acid, sulfonic acids, which, like gases together with stearic acid, form a surface-active medium in the cutting zone.

This medium creates protective films that reduce friction between the grain, the binder and the metal, and reduce the buildup of wear products on the tape. In addition, this surfactant medium is involved in the physicochemical processes between the deformable metal and the grain. Due to the large amount of gases and the activity of other decomposition products in the contact zone, the processes of diffusion, dissolution, internal adsorption of these substances in the volume of the deformable metal proceed extremely intensively, as a result of which the cutting processes and the cutting ability of the tape are accelerated. increases, and the roughness decreases.

The preparation of the lubricant is carried out in the following way.

The components heated to 70 ° C are introduced into the melt of stearic acid at JO ° C: first melted low-molecular-weight polyethylene, mineral oil, then azodicag bonamide or paraurethylanphenylsulfonyl azide, the mixture is thoroughly mixed and drunk in sutures of cardboard or metal with diameter of 30-40 mm and a height of 80-100 mm; Boundary values of the content | Components selected according to |: data from preliminary experiments.

With an azo compound content of more than 20 wt.%, The composition is crushed and not kept on the belt; with its content of less than 5 wt.%, The composition does not significantly affect the grinding process.

with O

five

0

five

35

40

45

When the content of low molecular weight polyethylene is less than 8 wt.%, Application of the composition during grinding is inefficient, and when the content of this component is more than 17 wt.%, The composition becomes very soft and is applied to the sanding belt in a thick layer, which reduces its cutting properties.

Formulations of lubricants are given in table 1, the test results in table 2.

The compositions of the proposed lubricants 1-10 and the prototype (composition 11) were tested when grinding samples of 45 steel with a size of 180-30-40 mm on an IS-1 stand with a tape of fabric sanding cloth 14A 25H s / s at a speed of 25 m / s and clamping force

.bon

Claims (1)

As can be seen from Table 2, the roughness of the treated surface when using the proposed lubricant is 1.5 times lower, and the cutting capacity is 1.55 times higher than when grinding with the use of a known lubricant. Invention Formula A lubricant for abrasive treatment of metals containing stearic acid, mineral oil and a polymer additive, characterized in that, in order to improve the process performance and the quality of the treated surface, the lubricant contains a low molecular weight polyethylene as an additive and additionally azredicarbonamide or para-urethylanphenylsulfonyl azide the following ratio of components, May.%: Azodicarbonamide or paraurethylaminophenylsulfonyl azide 10-20 Izkomolekulyarny polyethylene 10-15 Mineral oil 10-15 Stearic acid Else Table 1 Editor T. Lazarenko Compiled by Y. Ponomareva Tehred L.Svrdyukova Proofreader V. Kabatsky Order 8068/36 Circulation 446 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and publishing plant Patent, Uzhgorod, st. Gagarin, 101 Subscription