JPH0683238U - Mist supply device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an excellent atomized body supply device that can simultaneously satisfy the three problems of cooling a workpiece and a machining tool, removing machining debris, and imparting lubricity to a machining surface. To do. A hollow nozzle body 21 having a tip gradually formed to have a small diameter, and an annular slit S having a minute width formed by an outer peripheral surface of the nozzle body 21 fitted onto the nozzle body 21 and an opening on the tip side thereof. A guide ring 23 that forms a hole, and an air discharge hole 24 that communicates with the annular slit S of the nozzle body,
An air supply unit for supplying air into the nozzle body 21 is provided, and the liquid discharge hole 2 is provided at the small-diameter top portion of the nozzle body 21.
5 is formed, a liquid supply pipe 26 communicating with the liquid discharge hole 25 is provided in the nozzle body 21, and the air flow of the air jetted from the annular slit S is accompanied by the surrounding air to reduce the air flow rate. The liquid is amplified and flows along the outer peripheral surface of the nozzle body small-diameter portion 22, and the liquid ejection hole 2 of the nozzle body 21 is amplified.
The liquid discharged from 5 is atomized by the amplified air flow.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a mist supply device used when cutting or polishing a workpiece.

[0002]

[Prior art]

 Conventionally, when cutting or polishing a workpiece, in order to cool the heat generated by the collision between the workpiece and the machining tool, a water injection pipe is extended toward the vicinity of the machining point and a liquid jet is applied to the tip. A nozzle is attached and liquid is ejected. An example of such a liquid jet nozzle is shown in FIG. This nozzle 1 has a threaded portion 2 that engages with a water injection pipe, and an ejection tip 4 having an ejection hole 3 for ejecting a liquid. However, if a liquid is used when machining with a vertical and large machine tool such as a machining center, liquid and chips are likely to collect in the machining recesses, which may worsen the machining performance. In addition, when cutting with a tool made of cemented carbide intermittently colliding with a workpiece, the cutting edge becomes hot due to heat generation at the processing point and is cooled by liquid spraying at points other than the processing point. There is a problem that chipping (so-called “chipping” phenomenon) or cracking occurs due to repeated rapid thermal changes.

Therefore, in such a case, the liquid is not used, and the machining waste is blown off only by the air flow. However, only the air flow has a cooling effect and a lubricating effect on the workpiece and the machining tool. It becomes insufficient, and there are the following operational problems in cutting work, for example. That is, in the cutting of carbon steel such as S45C, the cutting heat hardens the surface of the work piece as if it were hardened, making surface finishing work such as polishing difficult. Chips with cutting heat cover the work surface. As a result, the work itself is heated and expands, and if the cutting is performed in that state, the machining dimensions become inconsistent.The cutting heat melts the surface of the work, and the molten metal adheres to the cutting edge of the cutting tool, causing the so-called Is formed, which deteriorates the finished surface roughness and dimensional accuracy.

On the other hand, it is also practiced to spray the liquid as it is, instead of spraying it as it is, to provide lubricity to the workpiece and the machining tool. In this case, for example, the mist spray nozzle 5 shown in FIG. 4 is used. When compressed air is supplied to the nozzle 5 as shown by an arrow P, a piston 7 held inside by a compression spring 6 is pushed upward in the drawing to communicate with a liquid passage 9 that communicates with a liquid supply pipe 8. The liquid is made into fine particles and ejected in the form of mist from the very narrow ejection ports of the tip nozzles 10 and 11 that are separated to the left and right. According to this method, there is an advantage that water does not accumulate in the recess unlike the case of applying liquid, and a certain degree of cooling effect can be achieved. However, no matter how high the compressed air is supplied, when the liquid is sprayed in a mist state, the mist floats in the air and sufficient wind pressure cannot be obtained, so it is possible to remove cutting debris and the like. However, there is a problem that the applicable range is limited.

[0005]

[Problems to be solved by the device]

 As described above, the conventional machining method cannot simultaneously satisfy the three problems of cooling the workpiece and the machining tool, removing machining chips, and imparting lubricity to the machining surface, depending on machining conditions. The process is only performed by selecting liquid spray, air flow, or atomized injection, and minimizing the disadvantages during processing.

The present invention has been made in view of such circumstances, and it is possible to simultaneously satisfy the three problems of cooling a workpiece and a machining tool, removing machining scraps, and imparting lubricity to a machining surface. It is an object of the present invention to provide an excellent atomized body supply device.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention is a device for supplying an atomized body toward a work surface of a workpiece, and a hollow nozzle main body whose tip portion is gradually formed into a small diameter, A guide ring which is externally fitted in the vicinity of the small diameter portion of the nozzle body and which forms an annular slit of a minute width by the outer peripheral surface of the nozzle body and the opening on the tip side thereof, and a predetermined ring which communicates with the annular slit of the nozzle body. The nozzle body is provided with an air discharge hole and an air supply means for supplying air into the nozzle body, and a liquid discharge hole is formed at a small-diameter top portion of the nozzle body. A liquid supply pipe communicating with the liquid discharge hole is provided, and the air flow of the air jetted from the annular slit flows along with the surrounding air to amplify the air flow rate and flow along the outer peripheral surface of the small diameter portion of the nozzle body, Is it the liquid discharge hole of the nozzle body? The first gist is a mist supply device in which the liquid to be ejected is atomized by the amplified air flow, and the device is the same as the above, in which the liquid ejection hole is a nozzle body A second gist is a mist supply device formed on the outer peripheral surface on the tip side from the guide ring outer fitting portion, not on the radial top portion.

[0008]

[Action]

 That is, the present inventor has a method for simultaneously satisfying the three problems of cooling a workpiece and a machining tool, removing machining debris, and imparting lubricity to a machining surface, in particular, a method for responding to the above problem by using a mist. I repeated a series of research on. Then, in the process, the guide ring is externally fitted to the hollow nozzle body whose tip is gradually formed to have a small diameter, and the annular slit between the guide ring and the nozzle body extends along the outer surface of the small diameter portion. We focused on the fact that there is a nozzle that injects air and causes ambient air to accompany it to amplify the air flow rate, and if an atomized body is created using this nozzle structure, the atomized body will be generated by the amplified air flow. I remembered that it could be supplied to the surface to be processed with a somewhat high wind pressure. As a result of further research, when a liquid is ejected from a portion of the nozzle body in which the ejected air flows, a minute amount of the liquid is sucked up by the air flow in the same configuration as the flow amplification nozzle. The inventors have found that the atomized substance becomes a minute atomized substance, and that the atomized substance is supplied to the work surface of the work piece with a force that is capable of accelerating to a certain extent and removing machining chips and the like. As a result, an excellent cooling effect and processing dust removal effect can be obtained, and the wetting effect on the surface to be processed is also sufficient.

Next, the present invention will be described in detail based on embodiments.

[0010]

【Example】

 FIG. 1 shows an embodiment of the present invention. As shown in FIG. 2, which is an enlarged cross-sectional view of the atomized body supply device 20, a tip portion 22 of a hollow nozzle body 21 is gradually formed to have a small diameter, and the small diameter portion 22 has a small diameter. A guide ring 23, which forms an annular slit S having a minute width by the outer peripheral surface of the nozzle body 21 and the opening on the tip end side of the nozzle body 21, is fitted in the vicinity. An air discharge hole 24 is formed in a portion of the nozzle body 21 overlapping the guide ring 23 and communicating with the annular slit S. It should be noted that a plurality of the air discharge holes 24 are provided at predetermined intervals in the circumferential direction and are provided at equal intervals.

Further, in the nozzle body 21, a liquid discharge hole 25 is formed at the top of the small-diameter portion 22, and one end of a liquid supply pipe 26 inserted in the nozzle body 21 communicates with it.

Further, one end of an air supply pipe (not shown) is communicated with an end opening of the nozzle body 21 on the side opposite to the small diameter portion 22. When the air is supplied to the air, as shown by an arrow P in FIG. 2, the air is discharged from the air discharge hole 24 and jetted from the annular slit S, and is accompanied by ambient air (the associated flow is indicated by an arrow Q). ) The air flow rate is amplified while flowing along the outer peripheral surface of the small diameter portion 22.

In the above structure, when air and liquid are simultaneously supplied from the respective pipes, a small amount of liquid discharged from the liquid discharge hole 25 is sucked up by the air jet flow flowing along the outer peripheral surface of the small diameter portion 22 of the nozzle body 21. It becomes a fine mist. Moreover, the obtained mist is pushed from the surroundings by the airflow that is trying to converge toward one point from the state where it spreads in an annular shape, and is pushed out while maintaining a relatively high wind pressure. Therefore, unlike the conventional atomized body, the atomized body has a force sufficient to blow off chips and the like generated during processing. This prevents chips and the like from accumulating in the periphery of the processed portion, and combined with the fact that the amplified large flow rate of air hits, the cooling effect is high. Moreover, the discharged mist appropriately wets the work piece and the working tool to enhance the lubricity, so that the working performance is improved. Therefore, the load on the working tool is lightened, and since it is not subjected to rapid cooling like liquid sprinkling, there is no intermittent thermal shock and the tool life is greatly extended. Since the type of liquid ejected by the atomized body can be changed according to the processing conditions, for example, in the case of high-speed cutting, water is used as the liquid to enhance the cooling effect, and in the case of medium / low speed cutting The oil can be used as a liquid to enhance the lubrication effect. Of course, it is possible to supply two or more kinds of liquids such as water, oil and emulsion to the liquid supply pipe 26 in a mixed state and atomize and supply the liquids.

In the above embodiment, the liquid discharge hole 25 is formed at the top of the small diameter portion 22 of the nozzle body 21, but it is not necessarily required to be provided at the small diameter top portion, and the liquid is ejected in a ring shape. It can be formed anywhere as long as it is the outer peripheral surface of the nozzle body 21 through which the air flow flows. However, when it is formed on the outer peripheral surface off the top, it is preferable to form a plurality of them at a predetermined interval in the circumferential direction.

Further, the apparatus of the present invention can be attached to a machining center as in the above embodiment, and can be attached to various machine tools such as an NC lathe and a grinder.

[0016]

[Effect of device]

 As described above, the atomizer supply device of the present invention utilizes the fact that the air stream injected in the form of a ring is amplified while being accompanied by the surrounding air, and the liquid is discharged to the center of this amplified air stream. It is made into a mist, and this mist can be supplied to the work surface of the workpiece with high wind pressure. Therefore, with this device, the atomized body can be strongly applied to the workpiece surface and the processing tool pressed against it, unlike the conventional case where the atomized body is simply applied. It is possible to sufficiently blow off chips and the like generated during processing. For this reason, chips and the like do not accumulate around the processing part, and the cooling effect is high in combination with the fact that the amplified large flow rate of air hits. Moreover, the discharged mist appropriately moistens the work piece and the machining tool to enhance the lubricity, thereby improving the machining performance. Therefore, the load on the working tool is lightened, and since it is not subjected to rapid cooling like liquid removal, there is an advantage that there is no intermittent thermal shock and the tool life is greatly extended. The type of liquid ejected by the atomized body can be changed according to the machining conditions.For example, in the case of high-speed cutting, water is used as the liquid to enhance the cooling effect, and in the case of medium / low speed cutting, Can be used differently, such as using oil as a liquid to enhance the lubrication effect.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part of the above embodiment.

FIG. 3 is a cross-sectional view of an example of a conventional liquid discharge nozzle.

FIG. 4 is a cross-sectional view of an example of a conventional atomized body supply nozzle.

[Explanation of symbols]

 20 Atomized Body Supply Device 21 Nozzle Main Body 22 Small Diameter Section 23 Guide Ring 24 Air Discharge Hole 25 Liquid Discharge Hole 26 Liquid Supply Pipe

Claims (2)

[Scope of utility model registration request] 1. A device for supplying an atomized body toward a surface of a workpiece to be machined, the hollow nozzle body having a tip portion gradually reduced in diameter, and a small diameter portion of the nozzle body. A guide ring that is fitted around the nozzle body and forms an annular slit of a minute width by the outer peripheral surface of the nozzle body and the opening on the tip end side thereof, and air discharge that is bored at a predetermined position in the nozzle body that communicates with the annular slit. A liquid supply pipe having a hole and an air supply means for supplying air into the nozzle body, wherein a liquid discharge hole is formed at a small-diameter top of the nozzle body, and the liquid supply pipe communicates with the liquid discharge hole in the nozzle body. Is provided, the air flow of the air jetted from the annular slit is accompanied by the surrounding air, amplifies the air flow rate and flows along the outer peripheral surface of the small diameter portion of the nozzle body, and is discharged from the liquid discharge hole of the nozzle body. The liquid to be amplified is the amplified air A mist supply device characterized by being atomized by a flow. 2. A device for supplying a mist to a surface of a workpiece to be machined, the hollow nozzle body having a tip portion gradually formed to have a small diameter, and a small diameter portion of the nozzle body. A guide ring that is fitted around the nozzle body and forms an annular slit of a minute width by the outer peripheral surface of the nozzle body and the opening on the tip end side thereof, and air discharge that is bored at a predetermined position in the nozzle body that communicates with the annular slit. A hole and an air supply means for supplying air into the nozzle body, a liquid discharge hole is formed on the outer peripheral surface of the nozzle body from the guide ring outer fitting portion to the tip side, and in the nozzle body, A liquid supply pipe communicating with the liquid discharge hole is provided, and the air flow of the air jetted from the annular slit flows along the outer peripheral surface of the nozzle body small diameter portion by entraining the surrounding air and amplifying the air flow rate, Is it the liquid discharge hole of the nozzle body? The atomized body supply device, wherein liquid ejected from the atomized body is atomized by the amplified air flow.