JP2645850B2 - Abrasive projection nozzle and abrasive projection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to an abrasive projection for cleaning and deburring a work by projecting an ultra-high pressure jet jet liquid together with an abrasive onto a work placed in a cleaning liquid. The present invention relates to a nozzle and an apparatus using the nozzle.

(Background of the Invention) An ultra-high pressure jet water (liquid) flow may be applied to a work in water (in a cleaning liquid) to perform deburring and cleaning of the work. At this time, the efficiency of deburring and cleaning is better when the abrasive is impinged on the workpiece than when the deburring and cleaning of the workpiece is performed only by the impact of the jet water flow.

For example, as shown in FIG. 3, an abrasive 72 such as a grindstone is mixed in advance in the cleaning water in the tank 70, and a jet water stream 78 is placed on the water 74 from a super high pressure jet nozzle 76 on the water surface. Hit it. The jet water stream 78 projected into the water directly collides with the work 74 and not only performs deburring and cleaning of the work 74 by the impact, but also entrains the abrasive in the water by the bubble jet formed at the time of underwater projection to the work 74. Make them collide. As a result, the work 74 can be more effectively deburred and cleaned. However, this method has an inconvenience that, depending on the shape of the water tank 70 in which the work 74 is placed, the shape of the work 74, and the like, the bubble jet generated by the jet water jet changes, and the abrasive 72 only partially works effectively.

A method shown in FIG. 4 can be considered as a method for solving such a problem. That is, the mixing chamber 80 is provided at the tip of the jet nozzle 76, the abrasive 72 is previously mixed into the jet water stream 78, and this is projected onto the underwater work 74 from above the water to minimize the amount of the abrasive used, and the water tank 70, the work Deburring and cleaning can be performed efficiently without being affected by the shape of the 74. In addition, since the mixed liquid mixed with the abrasive 72 is squeezed at the tip of the nozzle 82 to form a jet stream, the nozzle tip 84 is worn by the abrasive. Therefore, it is not suitable for long-time continuous operation. In addition, since a new abrasive is always mixed with the jet stream, the amount of the abrasive used increases.

(Object of the Invention) The present invention has been made in view of such circumstances,
The second object of the present invention is to provide an abrasive spray nozzle capable of efficiently mixing an abrasive into an ultra-high pressure jet water (liquid) stream and projecting the same onto a work in a cleaning liquid, and capable of operating for a long period of time without abrasive wear. This is the purpose of 1.

It is a second object of the present invention to provide an abrasive projecting apparatus which can reduce the amount of abrasive used and can efficiently deburr and clean a work in a cleaning liquid.

(Constitution of the Invention) According to the present invention, a first object is to perform cleaning and deburring of a work by projecting a mixed flow of a cleaning liquid and an abrasive from above onto a work immersed in a cleaning liquid mixed with an abrasive. In the abrasive spray nozzle, there is provided a washing liquid injection port for injecting the cleaning liquid substantially vertically downward, and an abrasive spray opening independent of the cleaning liquid injection port and opened close to the periphery of the cleaning liquid injection port. The present invention is attained by a polishing liquid jet nozzle, wherein a cleaning liquid jet jetted at a high speed from the cleaning liquid injection hole draws in a polishing slurry falling from a polishing slurry injection port and mixes the polishing slurry.

Further, a second object of the present invention is to provide an abrasive spray nozzle, a slurry pump for collecting a mixed slurry of a cleaning liquid and an abrasive from a liquid tank containing a work, and a cleaning liquid from the mixed slurry sent from the slurry pump. Tank for separating the abrasive from the slurry, a drying furnace for drying the abrasive separated in the separation tank, and a feed for sending the abrasive dried in the drying furnace to the abrasive projection port of the abrasive projection nozzle. The present invention is achieved by an abrasive projecting device characterized by comprising a pump.

(Embodiment) FIG. 1 is an overall explanatory view of an embodiment of the abrasive projecting device of the present invention, and FIG. 2 is an enlarged partial end view of the abrasive projecting nozzle.

In FIG. 1, reference numeral 10 denotes a work. This work
Numeral 10 is placed in the bottom liquid of a cleaning liquid tank 12 for deburring and cleaning.

Near the bottom of the cleaning liquid tank 12, the cleaning liquid (water) 14 in the tank 12
A collection tube 20 for collecting a mixed suspension 18 of the slurry 16 and the abrasive 16 is provided. A slurry pump 22 is provided in the middle of the collection pipe 20 to mix the mixed slurry 18 collected from the collection pipe 20 into a separation tank 24.
To send to. The separation tank 24 has a filter 26 at the bottom thereof,
The abrasive 16 is separated from the mixed slurry 18. Reference numeral 28 denotes a water supply pipe for returning the filtered washing water 14 to the tank 12.

Above the filter 26 in the separation tank 24, the separated abrasive 16
A transfer means (conveyor) 30 for carrying out the mist is provided, and a drying furnace 32 for drying the abrasive 16 is provided in the middle of the transfer.
At the transfer end portion of the conveyor 30, a reservoir 34 for receiving and storing the dried abrasive 16 is provided. Reference numeral 36 denotes a feed pump for transferring the dry abrasive in the reservoir 34 to an abrasive projection nozzle 40 described later, and reference numeral 38 denotes a transfer pipe thereof. 41 is a cleaning liquid tank
This is a drain pipe for draining the overflowing cleaning liquid to keep the liquid level of 12 constant.

Next, the abrasive spray nozzle 40 will be described with reference to FIG. The nozzle 40 of the present embodiment is fitted around a nozzle body 42, a nozzle cap 44 screwed to the tip thereof, a throttle member 46 sandwiched between the nozzle body 42 and the nozzle cap 44, and an outer periphery of the nozzle body 42. And an outer case 48. The cleaning liquid 14 that has passed through the cleaning liquid (water) flow path 50 formed at the center of the nozzle body 42 becomes a jet stream by the throttle member 46 at the flow path front end, and is jetted from the cleaning liquid jet port 52. The outer case 48 forms a chamber 54 with the nozzle cap 44, and the lower part thereof is an abrasive spray port 56 which is sandwiched and opened so as to concentrically surround the cleaning liquid spray port 52. Note that the opening surface of the projection port 56 is located slightly above the opening surface of the injection port 52, and the abrasive 16 falling from the projection port 56 does not mix with the jet jet at the injection port 52. Falls around its own weight.

Reference numeral 58 denotes an inlet for introducing the dry abrasive 16 into the chamber 54, and reference numeral 60 denotes a water supply hose for sending cleaning water to the flow path 50.

 Next, the operation of this embodiment will be described.

First, the work 10 is placed at a predetermined position in the tank 12, and the nozzle 40 is positioned above the work 10. High-pressure pressurized washing water 14
When the cleaning liquid 14 is sent to the
It becomes 14. On the other hand, the dry abrasive 16 (grind stone, walnut powder, glass beads, etc.) sent from the feed pump 36 falls from the abrasive projection port 56 by its own weight. The abrasive 16 falling around the jet jet 14 is attracted to and mixed with the jet jet 14 by the negative pressure generated by the jet jet 14. For example, when the throttle diameter of the throttle member 52 is 0.3 mm and the washing water is supplied under pressure at 700 kg / cm ² , the speed of the generated jet jet is about 380 m / s
It reaches ec and exceeds the speed of sound. The air in contact with such a high-speed jet jet is attracted by the viscosity of the water, the interface between the water and the outside air becomes negative pressure, and the abrasive 16 that has fallen under its own weight so as to wrap the area around the jet jet 14 in a cylindrical shape is a jet jet.
It is drawn into 14 and mixed, accelerated and projected onto the work 10.

The jet spray 14 and the abrasive 16 that have entered the water of the tank 12 directly collide with the work 10 at the bottom of the water or form a circulating flow around the work 10 to efficiently burr the work 10 while entraining the floating abrasive 16. Remove and wash.

The abrasive 16 that loses momentum and floats or precipitates in the tank 12 is pumped out as a mixed slurry by a slurry pump 22 and sent to a separation tank 24. The separated washing liquid passes through the pipe 28 and is
While the abrasive 16 is conveyed to the drying oven 32 by the conveyor 30.
Sent to The abrasive 16 from which water has been removed in the drying furnace 32 is stored in the reservoir 34 as a dry abrasive. This dry abrasive 16 is sent again to the projection nozzle 40 by the feed pump 36 and used repeatedly.

As described above, since the abrasive 16 falls by its own weight from the projection port 56 independent of the cleaning liquid injection port 52 without passing through the nozzle throttle section 46, the abrasive 16 wears and damages the nozzle throttle section 46 or causes blinding. Therefore, it is possible to extend the life of the nozzle throttle unit 46 and thus the entire nozzle 40. Also abrasive 16
Can be reused, so that the amount of the abrasive 16 used can be reduced.

In the above embodiment, the abrasive projection 56 is concentrically opened around the injection port 52, but the present invention is not limited to this, and the abrasive 16 can fall under its own weight at a position close to the periphery of the jet flow 14. The projection port 56 may be formed at such a position.

The cleaning liquid injected from the nozzle 28 is not limited to water,
An appropriate material such as an organic solvent may be used depending on the material of the work and the purpose of use.

(Effects of the Invention) As described above, in the first invention, the abrasive is made to drop almost perpendicularly from another abrasive outlet which is independent of the cleaning liquid outlet and close to the periphery of the cleaning liquid outlet. In addition, the abrasive can be efficiently mixed into the ultrahigh-pressure jet liquid (water) stream and projected onto the work in the cleaning liquid, and long-term continuous operation can be performed without abrasive nozzle wear.

In the second invention, the abrasive is repeatedly used, so that the amount of the abrasive used can be reduced, and the deburring and cleaning of the work in the cleaning liquid can be efficiently performed.

[Brief description of the drawings]

FIG. 1 is an overall explanatory view of an embodiment of an abrasive projecting device of the present invention, FIG. 2 is an enlarged partial end view of an abrasive projecting nozzle, and FIGS.
FIG. 4 is an explanatory view of a conventional technique. 10,54,74… Workpiece, 14,78… Cleaning liquid (jet jet), 16,72… Abrasive, 22… Slurry pump, 24… Separation tank, 32… Drying oven, 36… Reservoir , 40 ... Abrasive spray nozzle, 52 ... Washing liquid spray port, 56 ... Abrasive spray port.

Claims (2)

(57) [Claims] An abrasive spray nozzle for cleaning and deburring a workpiece by projecting a mixed flow of a cleaning fluid and an abrasive from above onto a work immersed in a cleaning fluid mixed with an abrasive. A cleaning liquid injection port that jets substantially vertically toward the cleaning liquid injection port, and a polishing agent injection port that is independent of the cleaning liquid injection port and that opens close to the periphery of the cleaning liquid injection port, and is jetted at high speed from the cleaning liquid injection hole. An abrasive projection nozzle, wherein a cleaning liquid jet draws in an abrasive falling from an abrasive projection port and mixes the abrasive. 2. An abrasive projecting nozzle according to claim 1,
A slurry pump for collecting a mixed slurry of the cleaning liquid and the abrasive from the liquid tank containing the work, a separation tank for separating the cleaning liquid and the abrasive from the mixed slurry sent from the slurry pump, A polishing furnace comprising: a drying furnace for drying the polishing slurry; and a feed pump for feeding the polishing slurry dried in the drying furnace to a polishing agent outlet of the polishing agent projection nozzle according to claim 1. Agent projection device.