DE202005010238U1 - Lubricating spray of cutting fluid for use in metal working has mixer producing mixture of water and cutting fluid which is stored in container and then delivered through high pressure pump - Google Patents

Abstract

The lubricating system has a mixer (1) for mixing a predetermined amount of cutting fluid with water to produce a mixture which can be stored in a container (2) until delivered to the object through a high-pressure pump (3). the pump is designed to generate a pressure of 70 to 110 bar. The drop size of the sprayed mixture is 0 to 100 micrometers.

Description

The The invention relates to a cutting fluid mist lubrication system the genus defined in the preamble of the protection claim 1.

STATE OF THE ART

Various cutting fluids as well as blends and emulsions of cutting fluids have been over a hundred Years used in the metal industry. cutting fluids can while processing e.g. to cool down of the object. The temperature of the object is directly dependent from the thermal conductivity the cutting fluid. Furthermore, can cutting fluids e.g. used for lubrication of the object to the friction reduce, thereby reducing the movements of the tools and their use is facilitated while the life is extended. The use of cutting fluids during machining reduces the cost of metalworking to a considerable extent.

So far are so-called Tiefdruckabkühlungssysteme for the use of cutting fluids known in metalworking. Furthermore, the so-called mist lubrication technology (microlubrication), in which by means of compressed air from the cutting fluid small drops are generated during the processing of the object guided become.

at The previously known systems, the problem is that at the workshop oil used during processing with the cutting oil is mixed. A disadvantage of the known systems is in perdition the cutting fluid and in the consequent exposure to odors and microbes as well as in the short life of the cutting fluid. When the cutting fluid spoils, the liquid needs to be changed throughout the system.

One Disadvantage of the known systems is also that for the processing a big Amount of cutting fluid mixture, 6 to 60 l / min, must be used. This also creates a size Amount of sewage and the cost of the disposal are significant.

One Disadvantage of the system based on the use of compressed air, further lies in the fact that the cutting fluid mixture with the surrounding Air is mixed while being the processing disturbing oil mist arises. Furthermore When using compressed air often creates a so-called insulating protective cover, which the cooling capacity of Compressed air remains low. Another disadvantage is that the costs for the Generation of compressed air are high.

Of the Invention is based on the object, the above-mentioned disadvantages to fix.

The The object of the invention is in particular, a new, simple and more handy cutting fluid mist lubrication system to create for use in metalworking. The task The invention is to provide a system with which the to be processed object and the tools faster and easier chilled and / or can be lubricated as with the systems known from the prior art.

SUMMARY OF THE INVENTION

The inventive system is by the protection claims defined characteristics defined. The invention is based on the research work carried out, at the surprising it has been found that in the cutting fluid mist lubrication system, used in metalworking, a high pressure pump can be used. Due to the high pressure used in the system and the resulting small drop size of the cutting fluid mixture increases the total area formed by the drops, with the used Cooling surface and thereby also the cooling speed of the object increases.

When Metalworking becomes, for example, machining, such as drilling, saws, Grinding, rolling, etc., of copper, aluminum, steel, e.g. stainless, acid-proof or hardened Steel, and any other similar Materials called.

• – eine Mischvorrichtung zum Mischen einer vorbestimmten Schneidflüssigkeitsmenge mit Wasser zur Bildung einer Mischung,
• – einen Behälter zur Aufbewahrung der Mischung aus Wasser und Schneidflüssigkeit,
• – eine Pumpe zur Förderung der Mischung aus dem Behälter zum Gegenstand, und
• – eine Düse zum Spritzen der Mischung zum Gegenstand, um ihn abzukühlen und/oder zu schmieren.

The cutting fluid mist lubrication system according to the invention, used in metalworking is used has

• A mixing device for mixing a predetermined amount of cutting fluid with water to form a mixture,
• A container for storing the mixture of water and cutting fluid,
• A pump for conveying the mixture from the container to the object, and
• A nozzle for spraying the mixture to the article to cool and / or lubricate it.

The inventive system is characterized in that the pump used in the system High pressure pump is. The high-pressure pump can be, for example, a water-hydraulic Be high pressure pump, e.g. be operated with an electric motor can. The high pressure pump can be arranged to have a Pressure from 70 to 110 bar, e.g. 100 bar, generated.

in the System can e.g. a microemulsion-type cutting fluid to be used for the water hydraulics is suitable. The cutting fluid is preferably completely miscible with water. As an example of one cutting oil Can the eco-friendly oil on tall oil basis be called biodegradable and non-toxic. The cutting fluid on tall oil basis easily forms a mixture with water. As a cutting fluid it is also possible to use another known cutting fluid, e.g. a cutting fluid Mineral base.

in the System may be a mixing device known per se for mixing of water and cutting fluid be used. The mixing device may e.g. a pump like a non-electrically operated piston pump and a mixing vessel, in which the water and the cutting fluid are mixed. With the mixing device becomes the concentration of the cutting fluid in the water as desired and suitable for the Purpose set. The cutting fluid can do so with water Mix the mixture cutting fluid in an amount of 0.1 to 99.9% by volume, preferably 1 to 50% by volume and more advantageously 1 to 10% by volume.

The Mixture of cutting fluid and water can be routed to the filter if needed, to those in the mix remove any impurities before the Cutting fluid mixture in the container guided becomes. Filtration keeps the high pressure pump and nozzles clean their maintenance is facilitated.

The System can also be other conventional Have filter. The water and the cutting fluid may e.g. filtered separately and cleaned before mixing in the mixing device become.

To the formation of the cutting fluid mixture and optionally after filtration, the mixture can be in a container guided become. Out of the container If necessary, the mixture can be used during processing with the High pressure pump to one or more nozzles are performed.

The nozzles used in the system can any known per se conventional Be nozzles. The size and the Number of nozzles may vary according to the purpose.

The Drop size of the the nozzles sprayed Mist hangs from the pressure. In one embodiment, the drop size of the mixture 0 to 100 microns, preferably 10 to 80 microns and more advantageously 25 up to 50 microns.

Next the above components, the system can be an automatic Container filling, valves, Lines, pipes, pressure gauges, thermometers, alarm sensors and any others, similar Have components. The system may e.g. Components for adjustment the pressure of the water fed into the mixing device between 1 and 10 bar. The system may also optionally include a so-called oil mist separator for filtration of any resulting mist. The system can also be a separate or existing one Control system connectable have automatic control unit, with the function of the Systems while processing is controlled automatically. The control unit can be set to trigger an error message if it detects an error in the function of the system.

The inventive system If necessary, it can be used simultaneously on several different processing devices be coupled.

An advantage of the cutting fluid mist lubrication system according to the invention is that due to the high pressure and thus due to the small drop size of the cutting fluid mist, the total area formed by the drops increases, as a result of which the cooling surface also increases considerably. As the cooling surface increases, so does the cooling rate of the article. The achievable with the system according to the invention cooling rate is even 400 times higher than the Abkühlungsge speed, which is achieved with the known from the prior art systems. The system also reduces friction in the article, making the tools faster to use, extending their life, and improving productivity. In addition to the above functions, the system can also be used for dust binding.

One Advantage of the system according to the invention lies in the fact that it is simple, economical and according to the Purpose is adjustable. The amount of cutting fluid For example, it can be set according to the item to be processed become. Furthermore the system can be retrofitted be mounted in existing devices.

One Another advantage is that in the system according to the invention the cutting fluid serves as a so-called one-time lubrication, thereby ensuring is that the liquid is not contaminated and these are not changed or processed must become. Furthermore, the consumption of cutting fluid mixture in the system according to the invention low, sometimes up to <1 l / min. The consumption of the known from the prior art systems can be at 6 to 60 l / min. As the cutting fluid mixture in the system according to the invention while the processing is consumed or evaporated, arises in the system according to the invention no cutting fluid waste and thus there are no disposal costs.

in the System can be used as a cutting fluid e.g. used a biodegradable cutting oil based on tall oil become. The oil on tall oil basis is an environmentally friendly alternative to many commercially available Cutting fluids.

For lubrication The high pressure pump is also suitable for water, with oil leakage as well as maintenance interventions are avoided. Besides, those are in the processing accumulating chips clean, which simplifies their reuse.

LIST OF FIGURES

following The invention will be described with reference to embodiments with reference on the associated Figure closer explained. Hereby shows:

1 : An exemplary diagram of the cutting fluid mist lubrication system of the invention.

DETAILED DESCRIPTION THE INVENTION

This in 1 shown cutting fluid mist lubrication system according to an embodiment of the invention, which is used in metalworking, has a mixing device 1 , a container 2 , a high pressure pump 3 and the nozzles 4 on.

Furthermore, the in 1 shown system a container 6 for storing the cutting fluid. Out of the container 6 for the cutting fluid, the cutting fluid is introduced into the mixing device 1 where the cutting fluid is in proper proportion with the water filled in the mixing device 7 is mixed. The pressure of the water flowing into the mixing device can be adjusted, for example, so that the water pressure is about 1 to 10 bar. The mixing device 1 For example, it may have a non-electrically operated piston pump, a mixing vessel and a scale for adjusting the mixing concentration. If necessary, water and cutting fluid can be filtered separately before entering the mixing device 1 be filled.

In the in 1 As shown in the embodiment of the present invention, the mixture of water and cutting fluid from the mixing device 1 through the filter 5 in the container 2 guided. The filter 5 removes any impurities that might occur in the mixture. The filtered mixture is placed in the container 2 Run out of a suitable amount of the mixture while working on to the nozzles 4 with the high pressure pump 3 is guided, which is operated by an electric motor. The high pressure pump 3 is arranged so that it generates a pressure of 70 to 110 bar, for example about 100 bar. From the high pressure pump, the mixture becomes the nozzles 4 out of which formed by the high pressure small Drops of the cutting fluid mixture to the object, for example sprayed to the workpiece and the tool to cool the article and / or lubricate.

This in 1 shown system according to an embodiment of the invention also has valves 9 , Knife devices 8th and an automatic control unit for controlling the operation of the system.

Example 1. Usage of the system when processing copper

The functionality of the present invention, i. the use of the cutting fluid mist lubrication system in metalworking was investigated by the system during Sawing one Copper blanks was used. In Table 1 are those in the experiments used parameters.

TABLE 1.

In The experiments were many different copper hardnesses as well investigated various copper mixtures. As a cutting fluid was a for the water hydraulics suitable microemulsion-type cutting fluid used, which was mixed with water.

by virtue of The experiments discovered that those formed with the system small mixture drops the object during processing effectively cooled down. In the sawing capacity of copper but no change across from the cutting fluid lubrication systems known from the prior art detected.

During the Edits did not become annoying from the mixture resulting oil mist found generally in known, air-based systems determine is.

During the Experiments were further recognized that with the system according to the invention and thus by the application of a smaller amount of cutting fluid the cleaning of the tools is easy and the cleaning result is good. Also, the chips were incurred in the processing were cleaner than when using the known from the prior art Systems.

During the Experiments were specifically recognized that the amount of cutting fluid needed with the system according to the present invention over the Significantly reduced from the prior art known systems can be. Only the necessary amount of the mixture could sprayed to the object, the mixture is not wasted has been. When the mixture drops during processing consumes were or evaporated, no separate cutting fluid waste, which had to be processed.

The Invention is not limited to the embodiments shown above limited, but in the context of the protection claims in a variety of modifications possible, which are within the meaning of the invention.

Claims (4)

A cutting fluid mist lubrication system for use in metalworking, the system comprising - a mixing device ( 1 ) for mixing a predetermined amount of cutting fluid with water to form a mixture, - a container ( 2 ) for storing the mixture of water and cutting fluid, - a pump ( 3 ) for conveying the mixture from the container to the object, and - a nozzle ( 4 ) for spraying the mixture to the object to cool and / or lubricate it, characterized in that the pump ( 3 ) is a high pressure pump. System according to the protection claim 1, characterized in that the pump is arranged, a pressure of 70 to 110 bar to produce. System according to the protection claim 1 or 2, characterized in that the drop size of the sprayed Mixture 0 to 100 microns, preferably 10 to 80 microns and more preferably 25 to 50 microns. System according to one of the claims 1 to 3, characterized in that the mixture cutting fluid in an amount of 0.1 to 99.9% by volume, preferably 1 to 50% by volume and more advantageously 1 to 10% by volume in proportion to the water includes.