HU185944B - Process for production of new /4-/diaril-metiliden-piperidino/-alkil-pirimidinone derivatives - Google Patents

Abstract

The invention relates to new cooling and lubricating pastes that can be used in the processing of metals and other materials and a method for improving known cooling and lubricating fluids. iel and object of the invention is to provide improved coolants and lubricants that ensure a sufficient cooling effect even with large erspanungsleistungen, with harmful steam evolution should be avoided. According to the invention, the paste consists of water, from 5.0 to 30.0 wt .-% bentonite (grain size less than 70 Mymeter) and optionally from conventional oil of any kind and amount. Further, the paste may contain lubricity enhancing additives such as soap, graphite and / or sulfur, with the total amount of bentonite and additives not exceeding 30% by weight. Also, to the pastes, disinfectants, e.g., formaldehyde, may be added.

Description

The present invention relates to a paste composition which can be used as a cooling lubricant in the cutting and cold forming of metals.

A variety of cooling lubricants are used for cutting and cold forming metals. The demand for these is multifaceted. The cooling lubricant must have a cooling lubricant effect that does not prolong the tool life; to reduce the heat build-up and ensure the desired smoothness of the machined surface. In addition, it must be washable and economically usable and must not be harmful to man and the environment.

Liquids, such as oil emulsions, are generally used as cooling lubricants. If a mold tool is used, or the machining speed is high, or high pressure is formed between the material to be worked and the tool, cooling with liquid cannot be sufficiently ensured.

Several formulations for solving this problem have been described in the literature, some of which are commercially available.

Austrian Patent 315,452 discloses a coolant comprising sulfates and nitrites of nickel, cobalt and iron. Due to the risk of poisoning, the use of this product requires great care.

The cooling lubricant described in Swiss Patent No. 481,208 is an emulsion consisting of alcohol amines and glycols, which, however, do not provide a satisfactory solution, since some of these chemicals cause skin diseases.

U.S. Patent No. 239,895 · 2 discloses a lubricant which is a mixture of oil, aluminum powder and graphite powder.

The condition for the application of the mixture is that the temperature of the material to be processed is above the melting point of aluminum in the application environment. Therefore, this mixture can only be used in rolling mills.

German Patent No. 1,594,532 describes a solution for reducing lubricant smoke, however, this lubricant can only be used for rolling mills.

The heat load can also be increased by using synthetic oils and synthetic fats. However, synthetic oils and synthetic fats are very expensive and also heavily pollute the environment. These include the coolant-lubricating paste produced by the Dutch company Cincinati, and the cutting-drilling fluid used by Dániel und Jager from Stuttgart under the fictional name Dundy. However, at high cutting rates, these lubricants also gasify, and the fumes and gases produced are harmful to health.

Further, a cooling lubricant composition is known for cold drawing plastics which, with the exception of water and oil, has an approx. 30 neutral solids, e.g. containing calcium carbonate, zinc sulfide, lithopone, or talc, and a stabilizer of 0.7-4.5% by weight of bentonite. Such a preparation is also disclosed in U.S. Patent No. 2,947,692. This product is also unsuitable for cutting or folding.

Thus, the object is to produce a cooling lubricant which, in high-performance cutting processes and cold forming, has a suitable cooling lubricant effect, that is, it has good adhesion and high heat load. Experiments with different materials have it

-2185,944 has shown that bentonite, by virtue of its swelling ability, is capable of forming a paste with a liquid such as a different water-based cooling lubricant. Experiments with bentonite have shown that bentonite can also be used advantageously when it is desired to use additives which improve the cooling lubricant and which are precipitated from the normal cooling lubricant. so their application is difficult.

Thus, the invention relates to a cold lubricating paste for metal cutting and extrusion cold forming, consisting of 40 to 60% by weight of water of any grade used in water-based cooling lubricating fluid, preferably boring oil and 5 to 50% by weight of bentonite, optionally 1-10% by weight. containing, as an additive, one or more of potassium stearate, magnesium stearate, aluminum stearate and zinc stearate, but the combined amount of these and bentonite does not exceed 30% by weight.

The use of the cooling lubricant paste according to the invention has the following advantages:

The bound humidity of the bentonite is released at a temperature of 500 - 700 0 °, so that during the cutting even the temperature range in which the oil is sufficient is cooled.

Due to the above, less steam and gas is produced during cutting.

Bentonite is a good lubricant by itself when absorbed, and a paste containing bentonite has better lubricity than the oil used.

In the paste, lubricating agents, e.g. soaps, sulfur, graphite may also be added which cannot be used in the coolant because they precipitate rapidly. Thus, the properties of the a-paste can be further improved.

Unlike synthetic pastes or fats, the paste of the present invention is easy to wash off.

The invention is illustrated by the following examples:

Example 1

A slip pull operation was performed. A 70mm diameter, 40mm high pot-like component had to be made of 2mm thick M2H grade steel plate. A stamping speed of 0.1 m / sec was used for the extrusion. Conventionally, the plate will need to be phosphated, otherwise the surface of the resulting component will be fractured, grooved, and will have an uneven wall thickness.

Coolant canopy was prepared for the operation. First, we prepared a 1: 1 emulsion by weight of water and a K-22 cooling lubricant product manufactured by Komárom Oil Company. then 95.0% by weight of this emulsion and 5.0% by weight of bentonite were mixed into a paste. The K-22 coolant oil composition contains 84.0% by weight of light mineral oil, 10.0% by weight of rapeseed oil-paraffin oil palm oil blend, 5.0% by weight emulsifier, 0.5% by weight bactericide and 0.5% by weight fatty alcohol sulphate.

Bentonite has a very high liquid-absorbing capacity, in particular a water-based liquid, so the preparation of the paste does not require much mixing. If the emulsion was still stable, a homogeneous paste would be formed without mixing, as described above, and mixing would only speed up the preparation. When water was mixed in K-22 cooling lubricating oil and bentonite in a single operation 3185,944, the resultant; the paste was of the same quality. Of course, a more formal mixing was required, using a 1400 p-1 paddle mixer.

The paste was applied to a non-phosphatized plate and thus performed the described deep grooving operation. The resulting component has a uniform wall thickness and a smooth surface throughout.

The K-22 mineral oil is a blend of oils of various origins processed in Hungary, containing varying proportions of naphthenic, aromatic and paraffinic mineral oils. They are all suitable for cooling-lubricating compositions, including paste.

EXAMPLE 2 Rotary Turning Turned Ball Ammonium The typical technical details of the operation are as follows:

Thread Rise Length Outer Diameter Depth Ball Size Material Quality: n or mai lz sleep: surface grade

190mm mm

28hll

2.6mm 0 7nm BCMol 650-800 B,

Cutting data: cutting speed 500 m / rpm 5 / p®ic tool: carbide insert

N / W 2.5 micron, Brush nozzles for this part previously with thread cutting paste from Cincinnati, Netherlands or Dundy 9107-KA from Stuttgart, Dundy 9107-KA in. The latter is made of silicone oil. The tool life was 2 hours in both cases. Because of the cooling power, gas formation was extremely strong, and the concentrated Dundy 9107-KA fluid also caused various diseases (eczema-like). This adverse side effect of fluids has been reduced by dilution, but the tool life has been reduced to the same extent.

The KA-9107 Dundy fluid, which -. As mentioned silicone oil, 14.0 percent by weight and 50.0 sulyszázalék bentonitofj2S 56.0 sulyszázalék water mixed with a paste prepared from ¹ ' By applying this paste to the parts to be machined, the life of the tool was 50% longer than that of the concentrated liquid, but at the same time the steaming was stopped and the preparation did not cause any disease.

Example 5

For the vortex thread turning operation of Example 2, a paste was prepared from the K-22 cooling lubricating oil detailed in Example 1. The paste contains 15.0% by weight bentonite, '45.0% by weight water and 42.0% by weight K-22 cooling lubricating oil. Application of the paste gave the same results as in Example 2.

Example 4. . ·

Based on the composition of the paste, the paste for the vortex screw turning operation of Example 2 was made with 40.0% by weight water, 10.0% by weight bentonite, and 50.0% by weight K-22 cooling lubricating oil-4185,944. We found that the increase of the cooling-lubricating oil ratio did not yield significant results, the surface quality improved slightly, but above 5θ, 0% by weight of oil the effect was not achieved.

5 · Example

Similarly to the previous one, we examined the effect of water content. For the vortex thread turning of Example 2, a paste was prepared from 60.0% by weight of water, 5.0% by weight of bentonite, and 35.0% by weight of K-22 cooling keno oil. The tool life has increased by a few percent, but the surface quality has just reached the desired level. Increasing the water ratio above 60.0% by weight can only be done to the detriment of surface quality, so it doesn't make sense.

Example 6

For control of the effect of bentonite, control pastes similar to the previous example were prepared by mixing less than 5.0 wt% bentonite. Despite changing the ratio of water to oil, these bentonite-poor formulations were no longer better than ordinary cooling lubricants.

Example 7

The effect of the paste was also verified when machining higher strength materials. We have been whirling threading the following component:

Rotation data:

The thread:

rise: 12 mm height: 6 mm length: 1200 τη τη outer diameter: 50 mm material quality: 060

cutting speed: 300 m / min object rotation: 3 rpm tool: hardwood molding blade: 800-900 N / mm ^ surface quality = s 2.5

Experiments have shown that higher bentonite and higher oil content are likely to be required to achieve adequate surface quality due to the higher strength of the workpiece. The paste with 30.0 wt.% Water, 30.0 wt.% Bentonite, and 40.0 wt.% Silicone oil responded best. Compared to simple silicone oil refrigeration, the service life is approx. It increased by 40%.

Example 8

For the deep drawing of the component described in Example 1, a paste was prepared in which calcium stearate was added as a lubricant additive. The paste compositions are 44.5% by weight of water, 4% to 5% by weight of K-22 cooling lubricating oil. 5.0% by weight of bentonite and 6.0% by weight of calcium stearate.

Applying the paste to the non-phosphatized plate, after deep drawing the surface quality was further improved compared to Example 1 and the component became perfectly smooth.

Example 9

The effect of stearate additive in machining

We also examined -5185.944.

An additive paste was prepared for Example 7. In particular, it has been found that machining with different formulations does not suggest that the combined content of bentonite and additives should be increased to above 30.0% by weight, since it does not show any added effect.

The paste consisting of 30.0% by weight of water, 29.0% by weight of bentonite, 40.0% by weight of silicone oil and 1.0% by weight of potassium stearate showed some improvement in life and surface quality compared to Example 7 ·. 5-8%. With an increase in stearate content, the service life is approx. It was expected to increase by 10%. This occurred at 10.0% by weight of potassium stearate. Further increasing the stearate content, the effect was no longer increased.

Example 10

For the deep drawing operation of Example 1, a paste was prepared containing 40.0% by weight of water, 5.0% by weight of bentonite, 40.0% by weight of vegetable oil, 3.0% by weight of calcium stearate, and 7.0% by weight of aluminum stearate. Applying the unphosphated sheet resulted in an excellent surface quality component.

EXAMPLE 11 As a comparative study, a deep drawing and cutting operation was performed as described in the above-mentioned Issue No. 2,947,692. US patent. The composition contained 75% by weight water, 4.5% by weight oil, 16% by weight calcium carbonate, 3% by weight sodium petroleum sulfate and 1.5% by weight bentonol.

The 0.1 m / aec. The surface of the M2H pot, which was 70 mm in diameter and 40 mm high and 2 mm thick, was heavily grooved.

With the technological data of Example 2, while machining the part also described there, it was found that even with B = 10 microns, the surface quality is below the required 2.5 microns. At the same time, tool life averaged 20 minutes.

The present invention has been tested in swathing and sweeping because of high cutting speeds and cold set deformation work, which results in the highest demands on both the tool and the material in these operations. The material to be machined was also selected according to the same criteria.

From the results of the tests carried out, it follows that the cooling lubricant paste of the present invention can be successfully applied to any cutting and cold forming technology and to any metal.

A paste was prepared with various additives, with various stearates, sulfur, graphite, molybdenum disulfide.

However, the effect of the additives was only checked as illustrated by the examples. The effects of the various additives could only be evaluated with a complex set of clichés and instrumentation.

Claims (1)

A patent claim Cooling-lubricating paste for metal cutting and cold forming, characterized in that it contains 40 to 60% by weight of water, XO - 50% by weight. containing from about 5 to 50% by weight of bentonite, optionally from 1 to 10% by weight of potassium stearate, magnesium stearate, aluminum azearate and / or oincstearate, with the proviso that the stearate not more than 50% by weight. without drawing