JP2001150296A - Cutting oil adhesion device for machine tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cutting machine adhesion device for a machine tool which enables cutting oil to adhere to a blade or the subject of machining with efficiency under as low ejection pressure as possible, while atomizing as little cutting oil as possible, for performing a variety of machining operations while ejecting the cutting oil toward the blade or the workpiece of machining, and which is devised to enhance the efficiency for adhering the oil thereto, thereby enabling the machining operation s without the cutting oil being scattered thereabout. SOLUTION: A high voltage is applied to a nozzle 2A from which the cutting oil 3W is ejected toward the blade 1 or the subject of machining MX, and the blade 1 or the subject of machining MX is grounded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting oil applying device suitable for use in various machine tools such as a milling machine, a drilling machine, and a lathe.

[0002]

2. Description of the Related Art When a workpiece is machined by using a blade like the above-mentioned machine tools, for example, Japanese Patent Application Laid-Open No. 62-11 / 1987.
As disclosed in Japanese Patent No. 4801 and Japanese Patent Laid-Open Publication No. Sho 50-38882, by jetting cutting oil from a nozzle to a blade or a workpiece, the lubricating action of the cutting oil reduces the rake face between the cutting chips and the blade. In addition to reducing friction between blades, reducing wear and tear on the cutting edge, extending the life of the blade, lowering the cutting temperature by its cooling effect, and improving the finished surface to improve the shape and dimensional accuracy of the workpiece Was being improved.

[0003]

However, all of the conventional apparatuses described in the above publications apply a high pressure to an injection nozzle to jet a large amount of cutting oil to a cutting tool or a workpiece. Thus, the lubricating effect and the cooling effect described above are provided, and when such a conventional device is used, a circulating device for circulating and using a large amount of injected cutting oil is required. When cutting oil is sprayed using a general spray nozzle that has a large diameter of droplets, the cutting oil cannot be reliably infiltrated into a cutting tool or a workpiece, so that the above-described lubricating effect and There was also a problem that the cooling effect could not be sufficiently achieved.

Further, when a spray nozzle for spraying is used to reduce the particle size of the droplet (mist), it is necessary to increase the spray pressure, that is, the spray pressure by using a large and powerful pump. Therefore, there is a problem that the size of the entire apparatus is increased and the cost is increased in synergy with the use of the above-described circulation apparatus.Moreover, since a large amount of cutting oil is sprayed, the oil is scattered to reduce surrounding environment. In addition to the problem of deterioration, it is necessary to take measures such as dust collection in order to prevent the deterioration of the environment, and there is a problem that the size and cost of the apparatus are further increased.

Accordingly, a technical problem of the present invention is to perform various types of machining while injecting a cutting oil onto a cutting tool or a workpiece, using a spraying pressure as low as possible, and in an amount as small as possible. Cutting oil deposition device for machine tools that can efficiently adhere to the blade or workpiece while atomizing the cutting oil, and improve the adhesion efficiency so that it can be processed without scattering the cutting oil around. It is to provide.

[0006]

Means taken by the present invention to solve the above-mentioned technical problems are as follows.

[0007] A cutting oil applying apparatus for a machine tool, wherein a cutting oil is continuously applied to one or both of the blade and the workpiece when processing the workpiece using the blade. ,

(1) A cutting oil nozzle for injecting cutting oil toward a blade or a workpiece by a pressurizing action of a pump is provided.
It is made of a conductive or semi-conductive material, a high voltage is applied to the cutting oil nozzle, and the above-mentioned blade or workpiece is grounded. (Claim 1)

(2) A corona discharge electrode is provided around a cutting oil nozzle which injects cutting oil toward a blade or a workpiece by a pressurizing action of a pump, and a high voltage is applied to the corona discharge electrode. Grounding the cutting tool or the workpiece. (Claim 2)

(3) The voltage applied to the cutting oil nozzle or the corona discharge electrode is configured to be adjustable. (Claim 3)

According to the means according to claim 1 described in the above (1), since a high voltage is applied to the cutting oil nozzle,
The cutting oil sprayed from this nozzle can be atomized without using a spray nozzle for spraying, and as a result, the pressure of the pump applied to the cutting oil nozzle, that is, the spray pressure, is reduced, and the energy saving effect is exhibited. enable.

According to the means described in the above (1), the droplets of the cutting oil sprayed from the nozzle in the form of fine particles are charged and ion-added. Since the blade or workpiece to be sprayed is grounded (earthed), the sprayed droplets are electrostatically attracted to the blade or workpiece to improve the adhesion efficiency and reduce the amount of cutting oil used. As much as possible, it is possible to improve the environment by reducing the scattering of cutting oil to the surroundings.

Further, according to the means described in the above (1), it is not necessary to use a large-sized device for supplying or recovering the cutting oil at a high pressure, so that the entire device can be simplified. In addition, since the cutting oil can be supplied as a fine mist, the cutting oil can be well penetrated between the blade and the workpiece, thereby achieving excellent lubrication and cooling effects.

According to the means according to claim 2 described in the above (2), since a high voltage is applied between the corona discharge electrode and the droplet, this cutting can be performed without using a spray nozzle for spraying. Cutting oil sprayed from the oil nozzle can be atomized,
As a result, the pump pressure applied to the cutting oil nozzle, that is,
It is possible to exert an energy saving effect by lowering the spray pressure.

According to the means described in the above (2), the droplets of the cutting oil sprayed finely from the nozzle are charged by corona discharge, and the droplets of the cutting oil are further sprayed. Since the blade and the workpiece are grounded (grounded), the sprayed droplets are electrostatically attracted to the blade and the workpiece to improve the adhesion efficiency and reduce the amount of cutting oil used. The cutting oil can be supplied at a high pressure or recovered while reducing the scattering of cutting oil to the surroundings and improving the environment. Exaggerated devices are no longer necessary,
The entire system can be simplified, and the cutting oil can be supplied as fine mist, so that the cutting oil can penetrate well between the cutting tool and the workpiece, exhibiting excellent lubrication and cooling effects. To be able to

According to the means according to claim 3 described in the above (3), by adjusting the voltage applied to the cutting oil nozzle or the corona discharge electrode, the particle diameter of the sprayed cutting oil droplets can be widened. Therefore, by selecting the particle size of the droplets according to the type of the workpiece and other processing conditions, it is possible to exhibit excellent processing effects, lubrication and cooling effects.

As described above, the above (1) to (1)
By solving the above technical problem by means of (3),
The problem of the conventional technique can be solved.

[0018]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a cutting oil application device for a machine tool according to the present invention.
FIG. 1 is a configuration diagram illustrating the entirety of the present invention according to claim 1,
FIG. 2 is a block diagram for explaining the entirety of the present invention according to claim 2. In these drawings, reference numeral 1 denotes a blade for processing a workpiece MX, 2 denotes a pump provided in the middle, An oil supply pipe in which the portion 2B is inserted into the container 3 containing the cutting oil 3W and the tip nozzle 2A is provided toward the blade 1 or the work MX, and 6 is an earth wire grounding the blade 1 Is shown.

In the present invention according to claim 1 shown in FIG. 1, at least a portion of the nozzle 2A of the oil supply pipe 2 is made of a conductive or semiconductive material. A high voltage of, for example, 5 to 10 KV is applied to the nozzle 2A from the high-voltage power supply 5 configured to be capable of adjusting the voltage, and the cutting oil 3W injected from the nozzle 2A is discharged, for example, by 50.
This is a mechanism for atomizing into a fine mist shape of μm or less and spraying either one or both of the cutting tool 1 and the workpiece MX.

In the present invention according to claim 2 shown in FIG. 2, a corona discharge electrode 5 'having a substantially ring shape is provided around at least the nozzle 2A of the oil supply pipe 2. Since a high voltage of, for example, 5 to 10 KV is applied to the electrode 5 ′ from the high-voltage power supply 5 configured to adjust the voltage, the cutting oil 3 W injected from the nozzle 2 A is charged by corona discharge. For example, 50μ
m, and is sprayed to one or both of the blade 1 and the workpiece MX.

The pump 4 is, for example, 1 kg / cm 2
The cutting oil 3W is ejected from the nozzle 2A at a pressure of 60 ml / min from the nozzle 2A. The condition of the pump 4 is an example of the embodiment, and in FIG. Although the ground wire 6 is grounded,
There is also a case where it is connected to X and grounded, and these conditions can be changed arbitrarily.

FIG. 3 is a graph showing the relationship between the applied voltage and the average particle diameter when kerosene is poured from a syringe needle on which a DC electric field is applied. It decreases exponentially with respect to the voltage. When the applied voltage is 0 or 3500 V, the diameter is three orders of magnitude (the volume is 9 digits).
It was found that the particle size could be controlled in a very wide range.

Since the cutting oil application device for a machine tool according to the present invention is configured as described above, it is provided at the portion of the nozzle 2A for spraying the cutting oil 3W or at the corona discharge electrode 5 'surrounding the nozzle 2A. For example, only by applying a high voltage of about 5 to 10 KV, the cutting oil 3W can be made into a fine mist and sprayed on the blade 1 or the workpiece MX without using a spray nozzle for spraying. The droplets of the cutting oil 3W sprayed on are charged, and the cutting tool 1 or the workpiece MX is grounded by the ground wire 6, so that the sprayed cutting oil 3W does not scatter around. It is electrostatically attracted to the ground side, that is, the blade 1 or the workpiece MX, and as a result, excellent lubrication and cooling effects can be obtained.

Further, according to the present invention, the cutting oil 3 is adjusted by adjusting the voltage of the high voltage power supply 5 in accordance with various conditions such as the type and size of the workpiece MX or the degree of processing.
W can be sprayed while being controlled to an optimum particle size.

[0025]

As described above, according to the cutting oil applying apparatus for a machine tool according to the present invention, the cutting oil is sprayed as fine mist on the blade or the workpiece, and these are sprayed. Cutting oil adheres to the cutting tool or workpiece,
Various processing operations can be performed in almost dry condition, and the amount of cutting oil used can be reduced, the injection pressure of cutting oil can be reduced, and the cutting oil is circulated. In addition to the fact that the circulating device and the dust collecting device are unnecessary, it is possible to provide a cutting oil deposition device that can be used for various machine tools and that can be manufactured at high performance and at low cost.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating the entirety of a cutting oil application device for a machine tool according to the present invention described in claim 1;

FIG. 2 is a configuration diagram illustrating the entirety of a cutting oil application device for a machine tool according to the present invention described in claim 2;

FIG. 3 is a graph of an experimental example showing a relationship between an applied voltage and an average particle diameter in kerosene.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blade 2A Nozzle 3W Cutting oil 4 Pump 5 High voltage power supply 5 'Corona discharge electrode 6 Earth wire MX Workpiece

Claims (3)

[Claims] When machining a workpiece using a blade,
A cutting oil applying device for a machine tool configured to continuously apply cutting oil to one or both of a cutting tool and a workpiece, wherein the cutting oil is applied to the cutting tool or the workpiece by a pressurizing action of a pump. A cutting oil nozzle for injecting cutting oil is made using a conductive or semi-conductive material, a high voltage is applied to the cutting oil nozzle, and the cutting tool or the workpiece is grounded. Cutting machine for machine tools. 2. When processing a workpiece using a blade,
A cutting oil application device for a machine tool configured to continuously apply cutting oil to one or both of a cutting tool and a workpiece, wherein the cutting oil is applied to the cutting tool or the workpiece by a pressurizing action of a pump. A cutting tool for machine tools, wherein a corona discharge electrode is provided around a cutting oil nozzle that injects cutting oil, a high voltage is applied to the corona discharge electrode, and the blade or the workpiece is grounded. Oil deposition device. 3. The cutting oil application device for a machine tool according to claim 1, wherein a voltage applied to the cutting oil nozzle or the corona discharge electrode is adjustable.