JPH0725079B2 - Water jet processing equipment - Google Patents

Description

TECHNICAL FIELD The present invention relates to a water jet machining apparatus that cuts a work by high-pressure water sprayed from a water jet nozzle.

[Prior Art] As a conventional water jet processing apparatus, one shown in FIG. 5 has been proposed (see Japanese Utility Model Laid-Open No. 61-154700). That is, the water jet nozzle 1 is disposed on one side surface 2 side of the work W, and the work W is
A tubular body 4 is disposed on the side of the other side surface 3. The tubular body 4 is located on the jet path of the high-pressure water J jetted from the water jet nozzle 1, and a water flow disturbing portion 5 is provided inside.

In such a structure, when the high-pressure water J is jetted from the water jet nozzle 1, the high-pressure water J is transferred to the work W.
The work W is cut by penetrating from one side surface 2 side to the other side surface 3 side. Also, the high-pressure water J that has penetrated the work W
The pressure of the water is disturbed by the water flow disturbing portion 5 inside the tubular body 4, whereby the generation of noise, which is a frictional noise with the air, when the high-pressure water J passes through the air at high speed is suppressed. is there.

[Problems to be Solved by the Invention] However, in such a conventional apparatus, the tubular body 4 is arranged at a fixed position regardless of the surface shape of the work W. Therefore, when the surface shape is changed downward like the illustrated work W ₁ , the distance from the cutting portion of the work W ₁ to the water flow disturbing portion 4 is L ₁ , like the work W ₂ . When the surface shape is horizontal, the distance becomes L ₂ , which is larger than the distance L ₁ .

At this time, as shown in FIG. 6, the diameter D of the high pressure water J is 1 m.
The nozzle diameter of the water jet nozzle 1 is maintained at a distance within sec, but it begins to expand when exceeding this distance, and after cutting the work, the cutting angle with respect to the work and the material characteristics (burrs are likely to occur). As a result, the diameter D gradually increases as the distance from the work increases.

As described above, the noise of the water jet processing device is a frictional noise with the high-pressure water J when the high-pressure water J passes through the air at a high speed. Therefore, as the diameter D of the high-pressure water J increases, The contact surface with air becomes large, and the noise also increases.

Therefore, as in the conventional device, if the distances L ₁ and L ₂ are different according to the works W ₁ and W ₂ , noise is suppressed when cutting the work W ₁ , but the work W ₂ When cutting, the noise increases as the distance L ₂ increases, and the noise increases and decreases in this way, which makes the operator more uncomfortable. Met.

The present invention has been made in view of such conventional problems, not only to reduce noise due to high pressure water flow,
It is an object of the present invention to provide a water jet processing device that stabilizes noise.

[Means for Solving the Problems] In order to solve the above problems, in the present invention, high-pressure water sprayed from a water jet nozzle is passed through from one surface side to the other surface side of the work, In a water jet processing device for cutting, a shelf plate facing the work is arranged on the other surface side, and is cut into a thread or tape and curled on the shelf plate and on the jet path of the high-pressure water. Stainless steel wool, which is an aggregate of stainless steel, is arranged.

[Operation] In the above configuration, the high-pressure water jetted from the water jet nozzle penetrates the work and cuts the work, and then rushes into the stainless wool, and the flow velocity is suppressed by the stainless wool. Therefore, when the high-pressure water passes through the air at high speed, noise that is a frictional noise with the air is reduced by the high-pressure water reaching the stainless wool and the flow velocity being suppressed.

Further, since the stainless wool is composed of an aggregate of stainless steel which is cut and curled into a thread shape or a tape shape, the whole shape can be freely changed. Therefore, by changing the thickness of the stainless wool arranged on the shelf board, the cutting site of the work is changed to the one side or the other side of the general surface of the work. However, the distance from the cut site can be easily made constant. When the distance between all the cut portions of the work and the stainless wool becomes constant, the noise of the high-pressure water jetted from the water jet nozzle after the work becomes constant at all the cut portions and does not increase or decrease. .

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings. That is, as shown in FIG. 2, the water jet processing apparatus 10 is provided with a base plate 11, and a pair of table slide rails 12, 12 facing each other are erected on both side edges of the base plate 11. Has been done. A processing table 13 is provided between the table slide rails 12 and 12.
Is slidably supported, and a catcher tank 14 is provided on the lower surface side of the processing table 13.

On the other hand, as shown in FIG. 1, on the upper surface side of the processing table 13, a rectangular sound insulation outer frame 15 is provided, and in the inner space surrounded by the sound insulation outer frame 15, Plural standing pipes 17 connected to the vacuum clamp pipe 16 ...
... is provided. A work receiving member 18 is fixed to the upper peripheral portion of the pipe 17, as shown in FIG.
The work receiving member 18 has a shape corresponding to a predetermined work to be fixed, and a plurality of holes 19 ... Are provided in a portion corresponding to a hole formed in the work. A packing 20 is attached to the periphery of the hole 19 and the periphery of the work receiving member 18 itself.

As shown in FIG. 4, a shelf board 29 is installed under the work receiving member 18, and stainless wool 21 as a water flow suppressing member is provided on the shelf board 29. The stainless wool 21 is an aggregate of stainless steel that has been cut into a thread shape or a tape shape and curled, and is located on the lower surface 27 side that is the other surface side of the work W fixed to the work receiving member 18. There is.

The stainless wool 21 is, for example, the work receiving member.
When there is a downward displacement surface 22 displaced below the general surface of the work W at one end of the work W fixed to 18,
The lower displacement surface 22 is disposed close to the lower displacement surface 22 with a distance L. When the horizontal extending surface 25 that is flush with the general surface of the work W is provided, the horizontal extending surface 21 is separated from the horizontal extending surface 21 by forming the stainless wool 21 into two layers as illustrated. The stainless wool 21 is placed in close proximity to the portion corresponding to the hole 19 with the distance L.
Are arranged.

As a result, the stainless wool 21 is cut at the cutting portion 26.
Is arranged so as to always follow the surface change at the distance L.

On the other hand, on the base plate 11, there is provided a processing booth 23 consisting of a box-shaped box with a lower surface formed of an iron plate or an acrylic plate, and a robot 30 is attached to the inner wall of the processing booth 23. . A water jet nozzle 24 is provided at the tip of the robot 30, and the water jet nozzle 24 is directed to the upper surface 28, which is one side surface of the work W. Further, the robot 30 can be operated three-dimensionally in the horizontal direction and the vertical direction, and is pre-teached so as to move along the cutting portion 26 of the work W.

In this embodiment having the above-mentioned structure, when the work W is placed on the work receiving member 18, the work W is attracted and fixed on the packing 20 by the negative pressure supplied from the vacuum clamp pipe 16. . When the machining table 13 is slid to a predetermined position in this state, the robot 30 is activated and the high-pressure water J is jetted from the water jet nozzle 24, the robot 30 causes the water jet nozzle 24 to cut the cutting portion. Move along 26.

Therefore, the high-pressure water J jetted from the water jet nozzle 24 penetrates the cutting portion 26 of the work W, whereby the work W is cut, and after the work W is cut,
The high-pressure water J plunges into the stainless wool 21 located on the jet path. The stainless wool 21 has elasticity because it is an aggregate of stainless steel that is cut and curled into a thread shape as described above.

Therefore, the energy when the high-pressure water stream J enters is
High pressure water flow J
The flow velocity of the water rapidly decreases from the time of entering the stainless wool 21. Therefore, when the high-pressure water J passes through the air at high speed, the noise that is a friction noise with the air is silenced when the high-pressure water J enters the stainless wool 21, and the noise can be reduced.

At this time, since the stainless wool 21 is arranged so as to follow the surface change in the cutting portion 26 of the work W as described above, even when the downward change surface 22 is cut, Even when the horizontally extending surface 25 is cut, the distance L between the work W and the stainless wool 21 is always kept constant.

Therefore, the noise generated after cutting the work W is reduced to the same extent at any cutting site 26 of the work W. Therefore, the noise does not increase or decrease depending on the cutting portion, and it is possible to eliminate the uncomfortable feeling given to the worker due to the noise increasing or decreasing.

Moreover, in this embodiment, the stainless wool 21 is used as the water flow suppressing member.
Since it is an aggregate of stainless steel that has been cut into a filament shape and curled as described above, the overall shape can be freely changed. Therefore, the cut portion can be easily cut by changing the thickness of the stainless wool 21 on the shelf board 29 by appropriately expanding or contracting the whole of the stainless wool 21, or by forming the two layers as described above. The distance L at 26 can be the same. Further, since the elasticity of the stainless wool 21 absorbs energy, the stainless wool 21 is less worn by the high-pressure water J and has excellent durability.

The high-pressure water J, whose energy is absorbed by the stainless wool 21 in this way, falls into the catcher tank 14, is stored in the catcher tank 14, and is then supplied again to the water jet nozzle 24 to supply the work W. It is used for cutting.

The noise generated after the high-pressure water J cuts the work W decreases as the distance L decreases. Therefore, if the stainless wool 21 is brought as close to the work W as possible, the noise will be generated. Will decrease. However, if the stainless wool 21 is brought too close to the work W, the water droplets that bounce off the work W will contact the work W and move the work W after the collision with the work 21.

However, in the present embodiment, the work W is sucked by the negative pressure from the vacuum clamp pipe 16 and adsorbed on the work receiving member 18. Therefore, even after the high-pressure water J has collided with the stainless wool 21 and the splashed water droplets contact the work W, the work W does not move. Therefore, by reducing the distance L as much as possible or by contacting the work W,
The noise can be further reduced.

When the work W is perforated, if the high-pressure water J is jetted toward the hole 19, the high-pressure water W is passed through the hole 19 after the work W is provided with the hole. It rushes into stainless wool 21 and also reduces noise.

[Effects of the Invention] As described above, according to the present invention, stainless wool composed of an aggregate of stainless steel that is cut and curled into a thread shape or a tape shape is arranged on a shelf board and jetted from a water jet nozzle. The flow velocity of the high pressure water after cutting the work was reduced. Therefore, since the whole shape of the threadless wool can be freely changed, the thickness on the shelf plate can be made to follow the surface change at the cut portion of the work as the shape changes. Therefore, even when the cut portion of the work changes to the one surface side or the other surface side with respect to the general surface of the work, the distance between the cut portion and the cut portion can be easily made constant. As a result, the noise caused by friction with the air when the high-pressure water passes through the air after cutting the work can be easily made constant at all cutting sites, and the noise changes during cutting work, so The discomfort given can be easily eliminated.

Further, since the stainless steel wool is composed of an aggregate of stainless steel that is cut and curled into a thread shape or a tape shape, the water flow is diffused in the stainless wool and the noise generated by friction with the air is suppressed. Further, it is possible to secure excellent durability with less wear due to the intrusion of high-pressure water.

Also, after elastically deforming due to the collision of high-pressure water, the original shape is restored by the restoring force of the steel, so even when the next same work is cut after the cutting of the work, the cutting site and stainless wool The interval is maintained constant.
Therefore, it is possible to successively and successively cut a plurality of the same works without increasing the noise.

Further, the stainless steel forming the stainless wool is unlikely to rust, and therefore rust does not cause unevenness on the surface. Therefore, it is possible to prevent inconvenience that new noise is generated due to high-pressure water colliding with the unevenness caused by rust.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an essential part showing an embodiment of the present invention, FIG. 2 is an overall perspective view of the same embodiment, and FIG. 3 is a work receiving member of the same embodiment. FIG. 4 is a perspective view showing the structure, FIG. 4 is a cross-sectional explanatory view corresponding to line IV-IV in FIG. 1, FIG. 5 is a cross-sectional view showing a main part of a conventional water jet machining apparatus, and FIG. It is explanatory drawing which shows the change state of the high pressure water corresponding to the distance from a jet nozzle. 10 …… Water jet processing device, 18 …… Work receiving member, 21 …… Stainless steel wool (water flow suppressing member), 22 ……
Downward change surface, 25 ... Horizontally extended surface, 26 ... Cutting site, 27 ...
… Other side, 28 …… One side, W …… Work.

Claims (1)

[Claims] 1. A water jet processing apparatus for cutting high-pressure water jetted from a water jet nozzle from one surface side of a work to the other surface side to cut the work,
A stainless plate is provided on the other surface side, which is opposed to the work, and is made of a stainless steel aggregate that is curled by being cut into a thread or tape on the shelf and on the jet path of the high-pressure water. A water jet processing device characterized by arranging wool.