DD220968A1 - CUTTING OIL FOR DISCONTINUED PRODUCTION - Google Patents

Abstract

Cutting oil for machining metallic materials under extreme demands on the cooling and lubricating effect, such. B. in the Raeum- and Verzahnungsfraesbearbeitung. The aim of the invention is a cutting oil, which guarantees the necessary cooling and lubricating effect by its specific composition of substances in the Raeum- and Verzahnungsfraesbearbeitung and counteracts by their specific effectiveness in the particular mass of built-up edge and thus significantly increases the Oberflaechenqualitaet and tool life. It has been found that the combination of mineral oil raffinate, chloroparaffin, natural fatty acid esters, bound unsaturated straight chain fatty acids alkyl, or aryl, or alkyl aryl phosphate, available sulfur and alkanolamine or alkylene oximide reduces built-up edge formation during roughing and spline milling and thus tool wear , which improves the surface quality of the workpieces, positively influences the chip formation process, since under the conditions of boundary friction with the found combination of additives, a friction-reducing lubricating film is built up which maintains the lubricating effect even at higher temperatures.

Description

20-30% bound unsaturated straight chain fatty acids with a warp length of C ₁₈ .

1.00-3.00% by weight of alkyl, or aryl, or alkyl aryl phosphate

0.10-0.50 Ma .-% of disposable sulfur

0.01-0.05% by mass alkanolamine or alkylene oximide. ,

Field of application of the invention

The invention relates to a cutting oil for machining of metallic materials with extreme demands on the cooling and lubricating effect, such as in the space and Verzahnungsfräsbearbeitung.

Characteristic of the known technical solutions

It is known to use medium-viscosity mineral oils as technological cooling lubricant in machining.

These mineral oils may have particular effects in reducing wear caused by friction and in improving other technological parameters such as surface finish, dimensional stability and dimensional accuracy

contain certain active ingredients. ,

Various domestic and foreign patents deal with the description of different compositions of the cutting oils.

The cutting oil according to the Romanian patent no. 69.411 contains 5% of the EPadditives S-Cl-P, 2% oxydated rapeseed oil and foam-inhibiting additives. DDR patent no. 96,251 relates to a suitable cutting metal for the machining of ferrous metals, containing 0.25-3% cupriculated and chlorinated fatty acid methyl ester, 0.001-0.05% fatty amine, 0.25-2% tricresyl phosphate and 0, Contains 25-2% diphenyl cresyl phosphate.

In U.S. Patent No. 3,852,206, a naphthene-based sulfonyl chloride oil and in ÖSSR Patent No. 173,939 a mineral oil raffinate containing a maximum of 40% sulfurized erucic acid triglyceride are disclosed, which have been specially developed for high-speed cutting :

In the cutting oil according to Soviet Patent No. 734,248, the increase in the life of the tool and the corresponding surface quality of the workpiece by a combination of different sulfur and Chlaridzuschlagstoffen type EP, alcohols having the carbon atom C ₇ -C ₁₂ , secondary monoalkylamine C ₁₀ -C ₁₄ , Zn dialkyl dithiophosphate, potassium sulfonate and Dipropylanat achieved. These products are adjuvants used in smoothing work

become. _;

Numerous patents also describe cutting oils containing various solid constituents. According to Soviet Patent No. 721,464, an increase in the life of the cutting tool and an improvement in the cut surface finish have been achieved by compositions containing oleic acid, polyethylene, water K ₃ Fe / CN / ₆ and CdS.

According to Polish Patent No. 105,596, a cutting oil has excellent lubrication, anticorrosive and gum inhibiting capabilities which include addition of MoS ₂ or graphite, copper or aluminum powder, benztriasol or mercaptobenztriasol, and cereal and other stabilizing alloying ingredients. In a cutting oil, which is described in Japanese Patent No. 878,293, in addition to the usual EP-active substances also CaCO ₃ and an organic molybdenum compound before.

The common disadvantage of the described cutting oils containing solid ingredients is the risk that these solid drugs sediment and thus their effectiveness is limited. In addition, these excreted additives can lead to clogging of the filter devices in the case of auxiliary agent care measures.

When applying these hitherto known technical solutions, the high demands on the lubricating and cooling effect, as they are made in the spatial processing or during gear milling on the cutting oil, can not be met. This is due to the on the one hand proportionately too low EP additive or on the other hand to the non-coordinated effective concentration of these EP additives and the different nature of the chemical bonding of the heteroatoms Cl, SP.

As a result of this inadequate lubrication and cooling effect thus occur surface fields by welding of the materials or by built-edge cutting, the wear of the tools is not reduced to a technically necessary extent and installed on the machine performance can not be fully utilized.

Object of the invention

The aim of the invention is a cutting oil that allows a good surface quality and dimensional accuracy of the workpieces and a reduction of tool wear in the clearing and Verzahnungsfräsbearbeitung. The invention is based on the object to find a cutting oil based on a mineral oil of certain viscosity and composition of matter and a suitable combination of active ingredients that guarantees the necessary cooling and lubricating effect during the clearing and Verzahnungsfräsbearbeitung and by their specific effectiveness in particular counteracted the built-up edge and thus significantly increases the surface quality and tool life.

-2- 256062 6

Explanation of the essence of the invention

It was found that with a combination of

2O, OO-flo, OOMa .-% Mineraiölraffinat, with a viscosity of 13-50mm ² / s, at 40 ⁰ C, having a flash point of at least 150 ⁰ C and an aromatic content of 5-25%, 30, 00-60 , 00% by mass chlorinated paraffin with a chlorine content of 25-30%, 5.00-15% by mass of natural fatty acid esters, the 40-50% of bound unsaturated straight-chain fatty acids with a C ₂₂ chain length and 20-30% of bound unsaturated straight-chain fatty acids containing a chain length of C ₁₈

1.00-3.00% by weight of alkyl or aryl or alkyl aryl phosphate,

0,10-0,50Ma .-% of disposable sulfur

0.01-0.05% by weight alkanolamine or alkylene oximide,

the built-up edge cutting in the clearing and Verzahnungsfräsbearbeitung reduced and thus a significant improvement in the surface quality of the machined workpieces and a reduction in tool wear could be achieved. The achieved reduction of tool wear by approx. 25-30% results in an increased throughput and thus a reduction in tool and machining costs.

Surprisingly, it has been found that with the inventive composition of the cutting oil of the chip formation process is positively influenced because under the conditions of the boundary friction with the found combination of additives, a friction-reducing lubricating film is built up, which maintains the lubricating effect during processing even at higher temperatures.

This is expressed by an improvement in the coefficient of friction over a wide temperature range and allows full utilization of the installed in the machine performance, without that the known cutting oils in the processing occurring smoke and mist formation could be determined.

At the same time it has been found that with the cutting oil according to the invention a comparison with the known cutting oils improved wetting and rinsing effect is achieved with low foaming.

Exemplary embodiments:

57.78Ma .-% mineral oil with a viscosity of 14mm ² / s at 40 ° C with a flash point of 152 ° C and an aromatic content

of 19% 35.10 Ma .-% Chlorparaffine

6.00Ma .-% rapeseed oil

1.00 Ma .-% tritolyl phosphate

0.02Ma .-% TEA '.

0.10Ma .-% of available sulfur

In a heated mixing vessel 20Ma .-% mineral oil are introduced and added with stirring, the rapeseed oil and the sulfur at a temperature of 100 ⁰ C. Thereafter, the remainder of mineral oil, chlorinated paraffin, tritolyl phosphate and TEA is added and stirred at a temperature of 40-50 ⁰ C until homogenization.

Example II:

Following the procedure described in Example I, the following components are mixed:

28.87 wt .-% mineral oil having a viscosity of 45 mm ² / s at 4O ⁰ C with a flash point of 204 ⁰ C and an aromatics content of 19%

59.00Ma .-% chlorinated paraffin 10.00Ma .-% rapeseed oil

1.90% by weight of tritolyl phosphate

0.03 mass% TEA

0.10Ma .-% of available sulfur

Example III:

The following components are mixed in accordance with the procedure described in Example I:

57.78% by weight of mineral oil having a viscosity of 45 mm ² / s at 40 ^° C. with a flash point of 204 ^° C. and an aromatic content

of 19% 35.10 Ma .-% chlorinated paraffin

6,00Ma .-% soybean oil.

1.00M% tritolyl phosphate.

0.02Ma .-% TEA

0.10Ma .-% of available sulfur

Example IV:

The following components are mixed in accordance with the procedure described in Example I:

57.78Ma .-% mineral oil having a viscosity of 45 mnrVs at 40 ° C with a flash point of 204 ⁰ C and an aromatic content

of 19% 35.10 Ma .-% chlorinated paraffin

6.00Ma .-% rapeseed oil

1.00 Ma .-% tritolyl phosphate

0.02Ma: -% morpholine / diethylene oximide '

0; i0Ma .-% of available sulfur

Claims (1)

-1- 2156 062 6 Invention claim: Cutting oil for machining in rooms and gear milling, consisting of a combination of mineral oil raffinate, chlorinated paraffin, fatty acid esters, organic phosphates, sulfur powder and organic amines, characterized in that the combination 20.0 (HB0.00Ma.- ^e / o Mineral oil raffinate with a viscosity of 13-50mm ² / s, at 40 ⁰ C a flashpoint of at least 150 ⁰ C and an aromatic hydrocarbon content of 5-25 Ma .-%, 30.00-60.00% by weight of chlorinated paraffin with a chlorine content of 25-30% by weight, 5.00-15.00Ma .-% vegetable or animal fatty acid esters,
the'- . :^: : '.-' '/' ''. ·. . ' :'" ' 40-50% bound unsaturated straight-chain fatty acids with a chain length of C ₂₂