JP3038778U - Mist generator - Google Patents

Abstract

(57) [PROBLEMS] To provide a mist generation device capable of supplying the generated mist to a distant region to be processed through a pipe. An oil passage portion (60) for discharging oil supplied from the base end side to the tip end side is formed inside an inner cylinder part (52), and an outer peripheral surface on the tip end side is directed toward the tip end side. The tapered peripheral surface 54 whose diameter is gradually reduced is finished. An outer jacket portion 80 is provided so as to cover the tapered peripheral surface 54 of the inner cylindrical portion 52, and an air flow path along the tapered peripheral surface 54 is provided between the tapered peripheral surface 54 and the inner peripheral surface of the outer jacket portion 80. Part 8
5 is formed. The air supplied from the base end side of the air flow passage portion 60 is sent to the tip end side of the inner cylinder portion 52 along the air flow passage portion 60, and the oil is supplied in a pulsed manner to the oil flow passage portion 60 to generate a mist. To do. This produces a mist of very fine particles.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a mist generation device that generates a mist used for lubrication and cooling during cutting such as cutting and chiseling.

[0002]

[Prior art]

 In metal cutting such as cutting and perforating, it is necessary to lubricate and cool the work area in order to improve the working efficiency and prolong the life of the tool.

Therefore, conventionally, oily or water-soluble oil is kept in a liquid state through a nozzle provided in the vicinity of a working tool such as a drill or a tap or an oil passage formed inside the working tool itself. The method of supplying to the processing area is generally used.

However, in the method in which the oil is supplied in the liquid state to the processing region as described above, a large amount of oil is consumed, so that the processing cost increases and the resources are wasted. In addition, the oil scattered around causes a malfunction of the processing machine and a deterioration of the working environment. In particular, in the current situation where ISO14000 has been standardized against the backdrop of increasing awareness of environmental protection on a global scale, it is necessary to avoid such a situation.

Therefore, another method has been proposed in which oil is generated in the form of mist and is sprayed on the region to be processed.

That is, in this method, as shown in FIG. 10, the oil 202 is continuously dripped into the nozzle 200 to which the air of about 10 kgf / cm ² is supplied, and the oil 202 is replaced with the air in the nozzle 200. They are mixed and ejected as mist from the nozzle tip portion 200a.

[0007]

[Problems to be solved by the device]

 However, according to the above method, the mist-like body can be maintained only within a range relatively close to the nozzle tip portion 200a, and therefore the nozzle 200 needs to be mounted near the processing tool, which reduces the degree of freedom in designing the processing machine. There is a problem of being restricted. By the way, even if a pipe such as an oil passage is connected to the tip side of the nozzle 200 to supply the mist to a region to be processed that is far away from the nozzle 200, oil particles collide with each other in the middle of the pipe and are combined. It becomes impossible to maintain the mist-like body.

Therefore, the present invention has been made to solve the above-described problem, and provides a mist generating device capable of supplying the generated mist to a distant processing region through a pipe. The purpose is to

[0009]

[Means for Solving the Problems]

 In order to solve the above problems, the mist generating device according to the first aspect of the present invention is internally provided with an oil passage part for discharging the water-soluble oil supplied from the base end side to the tip end side. In addition, the outer peripheral surface on the distal end side has an inner cylindrical portion finished to a tapered peripheral surface whose outer diameter size is gradually reduced toward the distal end, and an outer jacket is provided so as to cover the tapered peripheral surface. Thus, an air flow path portion is formed along the tapered peripheral surface between the tapered peripheral surface and the inner peripheral surface of the outer jacket portion, and the air supplied from the air flow path base end side is supplied to the air flow portion. It is characterized in that the mist is generated by feeding the oil to the tip end side of the inner cylindrical portion along the flow path portion and supplying the oil in a pulse shape to the oil flow path portion.

Further, as described in claim ² , while supplying the air at a pressure of 2.5 to 10 kgf / cm ² , the oil is supplied at a pressure of 0 to 20 kgf / cm ² and a flow rate of 3 to 50 cc per minute. In a pulsed manner, the inclination angle of the tapered peripheral surface is set to 10 to 12 degrees, and the cylinder wall thickness dimension at the oil flow passage opening end of the inner cylinder is set to the tip of the oil flow passage. It may be formed to have substantially the same diameter as the inner diameter, and the inner diameter of the tip of the oil flow path may be set to 1 to 2 mm.

[0011]

[Embodiment of the invention]

 Hereinafter, a mist generating device according to an embodiment of the present invention will be described.

That is, as shown in FIGS. 1 to 3, the mist generating device 50 is internally provided with an oil flow passage portion 60 for discharging the oil supplied from the proximal end side to the distal end side. The outer peripheral surface on the tip end side has an inner cylindrical portion 52 formed on a taper-shaped peripheral surface 54 whose outer diameter dimension is gradually reduced toward the front end direction, and the inner cylindrical portion 52 has a substantially cylindrical shape. The outer jacket portion 80 is externally fitted to form an air flow path portion 85 along the tapered peripheral surface 54 between the tapered peripheral surface 54 and the inner peripheral surface of the outer jacket portion 80.

As shown in FIG. 2, the oil passage portion 60 of the inner cylinder portion 52 has a small diameter portion 62, a medium diameter portion 64, and a large diameter portion 66 formed in order from the tip end side thereof, and from the tip end side thereof. For connecting the oil pipe (not shown in FIGS. 1 to 3) for supplying oil from the outside to the base end side, which is formed so that the diameter gradually increases toward the base end side. Is provided with a connecting portion 68.

It should be noted that the reason why the inner diameter of the oil flow path portion 60 is gradually increased toward the base end side in this way is necessary on the front end side as a condition for mist generation as described later. This is to secure a small diameter and to secure an internal capacity (described later) of the oil flow path portion 60 that is appropriate for the amount of oil supplied.

The outer diameter of the tip surface of the inner cylindrical portion 52 is three times as large as the inner diameter of the small diameter portion 62, that is, the thickness of the inner cylindrical portion 52 is the same as the inner diameter of the small diameter portion 62. It is said that.

From here, a tapered peripheral surface 54 whose outer diameter size gradually increases toward the base end side is formed in a region corresponding to the small diameter portion 62 and the medium diameter portion 64 on the outer peripheral surface of the inner tubular portion 52. Has been. Further, the body portion 56 is formed in a region corresponding to the maximum outer diameter portion on the base end side of the tapered peripheral surface 54 and the large diameter portion 66 on the base end side, and the connecting portion 68 on the base end side of the body portion 56. A peripheral projection 58 is formed in a region corresponding to the above so as to be closely fitted to an outer cover 80 described later.

On the other hand, as shown in FIGS. 1 and 3, the outer cover portion 80 includes a jet chamber portion 82, a taper housing portion 84, a housing body portion 86, and a housing projection portion 88 in this order from the tip side.

The ejection chamber portion 82 is arranged in the distal end side region of the inner cylindrical portion 52, and the mist is generated in the inner region thereof. A connecting portion 81 for connecting a mist pipe for supplying the generated mist to an external tool is provided on the tip side thereof.

Further, the taper housing portion 84 is disposed in a region corresponding to the tapered peripheral surface 54, covers the taper peripheral surface 54 at a position separated from the peripheral surface 54 by a predetermined distance, and forms the tapered peripheral surface. An air passage portion 85 having a predetermined width is formed between the surface 54 and the inner peripheral surface of the taper housing portion 84.

A receiving body 86 is arranged in a region corresponding to the body 56 from the maximum outer diameter portion on the base end side of the tapered peripheral surface 84. The accommodating body portion 86 covers the body portion 56 at a position separated from the peripheral surface by a predetermined distance, and forms an air introduction space portion 87 having a predetermined width between the outer peripheral surface of the body portion 56 and the inner peripheral surface of the accommodating body portion 86. A connecting portion 90, which is formed and to which an air supply pipe (not shown) is connected, is provided above it.

Further, an accommodation protrusion 88 is provided in a region corresponding to the peripheral protrusion 58 on the proximal end side of the accommodation body 86, and the circumferential protrusion 58 is closely attached to the accommodation protrusion 88, so that the air The flow path portion 85 and the air introduction space portion 87 are sealed at the base end side.

Hereinafter, a method of generating mist by the mist generating device 50 and its principle will be schematically described.

First, air of a predetermined pressure is introduced from the connecting portion 90 on the base end side of the air flow path portion 85, and the oil is intermittently supplied from the connecting portion 68 on the base end side of the oil flow path portion 60, that is, in a pulse form. Supply in a shape.

Then, as shown in FIG. 4, while the oil supply is stopped, the air flowing along the air flow path portion 85 causes the air flow path portion 85 on the distal end side of the inner tubular portion 52 to be extended. A high-speed air flow path G is formed at.

A substantially conical space V surrounded by a conical peripheral surface extending from the tapered peripheral surface 54 to the tip side thereof is formed inside the flow channel G, and flows through the flow channel G. The high-speed air flows toward the tip while entraining the gas in the space V.

When the gas is entrained from the space V to the flow path G side by the high-speed air as described above, a swirl having a high rotation speed is formed in the space V as shown in FIG. Since the oil supply from the oil passage 60 on the side is stopped, the low pressure state is extremely close to the vacuum state.

At this time, in the space V, the degree of vacuum increases along the conical surface thereof, and if such a portion having a high degree of vacuum is also formed in the oil flow path portion 60, it will be described later. As described above, since it is difficult for oil to be sucked from the oil flow path portion 60, in this device, in order to avoid it, the thickness of the pipe wall at the tip of the inner cylindrical portion 52 is set to be approximately the same as the inner diameter of the small diameter portion 62. ing.

In this state, when oil is supplied to the oil flow passage portion 60, the negative pressure in the space V that swirls sucks out the oil in the flow passage portion 60, and the inside of the ejection chamber portion 82 on the tip side thereof. Erupted into.

Then, when the supply of oil is stopped again, a low-pressure space V is formed again at the front end side of the opening of the oil passage portion 60, and the above operation is repeated.

According to the mist generating device 50 configured as described above, the oil is sucked from the oil flow path portion 60 by the low-pressure space V that swirls the swirling flow and is ejected into the ejection chamber portion 82. Therefore, it is possible to generate a mist composed of very fine oil particles.

The mist thus generated rarely causes particles to collide and bond with each other even when passing through the pipe, and the generated mist is located at a position far from the mist generating device through the mist pipe. Can be supplied.

Further, when the mist made of such extremely fine oil particles is sprayed on the work area, the adhesion to the work piece is better than when the mist made of large particles is sprayed. As a result, the effect of improving the lubrication performance between the tool and the work piece can be obtained. Furthermore, the mist of fine particles is easily vaporized in the processed area, and the cooling performance is excellent.

Preferable conditions for generating a mist of fine particles in such a mist generating device 50 are as follows. First, the pressure of the air supplied from the connecting portion 90 is preferably in the range of 2.5 to 10 kgf / cm ² . This is because if the pressure is less than 2.5 kgf / cm ² , the generated mist cannot be sent to a long distance through the mist pipe, and if the pressure exceeds 10 kgf / cm ² , it is generated. This is because the mists collide with each other in the middle of the mist piping and combine with each other, and the mist state cannot be maintained. Since the pressure of the air piped in the factory where the mist generating device 50 is normally used is 7 kgf / cm ² or less, the existing factory air may be used as it is.

The oil supplied from the oil flow path portion 60 is preferably supplied at a pressure of 0 to ²⁰ kgf / cm ² and a flow rate of 3 to 30 cc per minute.

Further, an oil flow passage portion 60 including a small diameter portion 62, a medium diameter portion 64, a large diameter portion 66 and a connecting portion 68 and an oil pipe from a pump for supplying oil to the oil flow passage portion 60. The total volume is preferably about the same as the amount of oil supplied per pulse. This is so that the oil supplied by one pulse fills the oil flow path section 60.

The inclination angle θ of the tapered peripheral surface 54 with respect to the central axis X of the oil flow path portion 60 is preferably 10 to 12 degrees. This is because the space V surrounded by the extended surface of the tapered peripheral surface 54 has a volume necessary for sucking the oil from the oil flow path portion 60.

[0037]

【Example】

 An embodiment of a mist supply device equipped with the mist generation device according to the present invention will be described below.

As shown in FIGS. 6 and 7, the mist supply device 2 sucks up the water-soluble oil stored in the tank 4 by the pump 10 and supplies the water-soluble oil to the mist generation device 50 as well as the external supply. Air of a predetermined pressure is configured to be supplied to the mist generating device 50 via the adjusting valve unit 20 and the pressure adjusting unit 30.

A suction pipe 12 having a filter 14 at the opening end is extended from the pump 10 to the lower side of the tank 4, and the water-soluble oil in the tank 4 sucked up through the suction pipe 12 is an oil. It is supplied from the rear end side of the mist generating device 50 via the pipe 16.

The pump 10 is configured to supply the absorbed water-soluble oil in a pulsed form to the mist generating device 50. The number of pulses per minute and the amount of supply per one pulse are strokes. The amount can be adjusted by a stroke adjusting dial 42 and a pulse number adjusting dial 44 provided on a panel 40 on the front surface of the mist supply device 2, respectively.

Further, air such as factory air supplied into the device 2 through the air pipe 18 a is first sent into the adjusting valve unit 20. An electromagnetic valve electrically connected to the pump 10 is used as the adjusting valve unit 20, and the electromagnetic valve is opened only while the water-soluble oil is being supplied in pulses by the pump 10 to supply the air. Is being carried out.

Air is supplied from the adjusting valve unit 20 to the pressure adjusting unit 30 via the air pipe 18 b, and the pressure of the air measured here is displayed by the pressure gauge 46 provided on the panel 40. The pressure of the air is adjusted by the pressure adjusting dial 48 of the panel 40 and is supplied to the mist generating device 50 through the air pipe 18c.

When the water-soluble oil and the air are thus supplied to the mist generating device 50, the water-soluble oil is generated in the form of mist here and is supplied to the outside through the mist pipe 6 as described above. It

As shown in FIG. 8 or FIG. 9, the mist pipe 6 is connected to the oil supply ports 182a, 182b provided in the processing devices 180a, 180b such as a chisel, and the processing devices 180a, 182b are connected to the processing devices 180a, 182b. It is supplied to the oil passage 188a inside the drill 188a through the pipes 184a and 184b inside the 180b, and is sprayed toward the work area between the tip of the drill 188a and the work piece (see FIG. 3). Further, the nozzle 190b provided around the drill 188b sprays the work area at the tip of the drill 188b.

If the processing apparatus is not a processing apparatus for drilling with a drill, for example, if it is another processing apparatus such as tapping, die processing, or cutting processing, the processing apparatus is similarly installed near the processing tool through a pipe in the apparatus. It suffices to spray the processed area with the nozzle.

The mist generating device 50 has been described with reference to FIGS. 1 to 3, but the dimensions of each part are set as follows.

That is, in the inner cylindrical portion 52, the length dimension of the small diameter portion 62 along the X axis is 8 mm, the diameter dimension thereof is 1 mm, the length dimension of the middle diameter portion 64 is 9 mm, and the diameter dimension is 1.5 mm. The length dimension of the large diameter portion 66 is 16 mm, the diameter dimension is 5 mm, and the length dimension of the circumferential projection 58 is 10 mm. The inner circumferential surface of the large diameter portion 66 has a thread groove for screw-engaging the oil pipe 18c. Are formed. The width of the air passage 85 in the radial direction is set to about 3 mm.

Further, the inclination angle θ of the tapered peripheral surface 54 with respect to the X-axis direction is set to 10 degrees, the length dimension along the X-axis direction is set to 20 mm, and the smallest diameter portion on the tip side is set. The outer diameter dimension of is set to 3 mm, and the outer diameter dimension of the maximum diameter portion on the base end side is set to 10 mm.

On the other hand, the outer cover portion 80 has an entire length (excluding the connecting portion 81, from the tip of the ejection chamber portion 82 to the base end side of the containing projection 88) of 80 mm.

The ejection chamber 82 has an outer diameter of 8 mm, the accommodating body 86 has an outer diameter of 16 mm, and a length along the X-axis direction of 13 mm. The length dimension of the housing protrusion 88 is set to 10 mm.

According to the mist supply device configured as described above, the air pressure is 3 kgf / cm. ^Two , Water-soluble oil pressure 10kgf / cm^TwoWhen the mist was generated at a flow rate of 5 cc / min and 150 puls / min, it was possible to supply the mist through a pipe of 30 m.

The result of comparison between the case where the mist generated by this mist supply device is sprayed onto the processing area to perform the bite processing and the case where the oily oil is flowed down to the processing area as a liquid to perform the bite processing. Became as follows.

The conditions are as follows: the feed of the processing tool is 0.3 mm / r, the peripheral speed is 150 m / min, and 0. In the case of finishing machining of 3 mm, the mist supply device supplies an air pressure of 3 kg / cm ² , oil at a flow rate of 5 cc / min, and water-soluble oil (Mighty Mist ( Product name), manufactured by Mighty Science Co., Ltd.) was used.

As a result, when the oily oil was flowed down in a liquid state, the flank surface was worn by 0.827 mm, whereas the mist generated by this mist supply device was sprayed. The flank wear was 0.131 mm, which was less than when the oily oil was flowed down.

In addition, since the oil is sprayed onto the area to be processed in the form of mist, the oil consumption can be drastically reduced compared to the conventional case where oil is flowed down, and ISO14000 certification can be obtained. It turned out that it is possible and contributes to environmental conservation.

[0056]

[Effect of the invention]

 As described above, according to the mist generating device of the first aspect of the present invention, the oil flow passage portion for discharging the oil supplied from the proximal end side to the distal end side is formed inside, and the mist generating device of the distal end side is formed. The outer peripheral surface has an inner cylindrical portion finished into a taper-shaped peripheral surface whose outer diameter dimension is gradually reduced toward the tip end direction, and an outer jacket portion is provided so as to cover the tapered peripheral surface. An air flow path portion is formed along the tapered peripheral surface between the tapered peripheral surface and the inner peripheral surface of the outer jacket, and air supplied from the air flow path base end side is guided along the air flow path portion. Is sent to the tip side of the inner cylinder part and oil is supplied to the oil flow path part in a pulse shape to generate mist. The high-speed air sucks in the air at the tip of the air flow path opening and swirls there. Low pressure of the portion wound is formed. The low-pressure portion of the vortex flow sucks the oil in the oil flow passage portion to generate mist. Therefore, a mist composed of extremely fine particles is generated, and such a mist can be supplied to a distant processed region through a mist pipe.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a mist generation device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing an inner cylinder portion of the above mist generating device.

FIG. 3 is a side view showing an outer cover portion of the above mist generating device.

FIG. 4 is an enlarged cross-sectional view of an essential part for explaining the principle of the above mist generating device.

FIG. 5 is an enlarged cross-sectional view of an essential part for explaining the principle of the above-described mist generation device.

FIG. 6 is a front view showing a mist generating device according to an embodiment of the present invention.

FIG. 7 is a rear view showing the mist generating device of the above.

FIG. 8 is a diagram illustrating a usage example of the above-described mist generation device.

FIG. 9 is a diagram illustrating another example of use of the above mist generation device.

FIG. 10 is a sectional view showing a conventional example.

[Explanation of symbols]

 52 Inner cylinder part 54 Tapered peripheral surface 60 Oil flow path part 80 Outer jacket part 85 Air flow path part

Claims (2)

[Utility model registration claims] 1. An oil passage portion for discharging oil supplied from the base end side to the tip end side is formed inside, and the outer peripheral surface on the tip end side has an outer diameter dimension sequentially oriented toward the tip end side. It has an inner cylindrical portion finished to a tapered peripheral surface that is reduced in diameter, and an outer jacket portion is provided so as to cover the tapered peripheral surface, and the outer jacket portion is provided between the tapered peripheral surface and the inner peripheral surface of the outer jacket portion. An air flow path is formed along the tapered peripheral surface, and air supplied from the air flow path base end side is sent to the inner cylinder tip end side along the air flow path part and the oil flow path is formed. A mist generating device characterized in that a mist is generated by supplying a pulsed oil to the portion. 2. The air has a pressure of 2.5 to 10 kgf / c.
It is supplied m ^{2, and} the said oil 0~20kg
It is supplied in pulses at a flow rate of 3 to 50 cc per minute at a pressure of f / cm ² , the inclination angle of the tapered peripheral surface is set to 10 to 12 degrees, and the oil flow path opening end of the inner tubular portion is set. And a wall thickness of the oil passage is substantially the same as the inner diameter of the tip of the oil passage, and the inner diameter of the tip of the oil passage is 1-2.
The mist generating device according to claim 1, wherein the mist is set to mm.