JP2594091Y2 - Abrasive water jet nozzle structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The disclosed technology belongs to the technical field of the structure of a nozzle of an abrasive water jet in which powdery material such as garnet sand is mixed into high-pressure water from a high-pressure water nozzle.

[0002]

2. Description of the Related Art As is well known, various types of machinery and equipment mostly consist of a combination of a plurality of parts rather than a single part, and therefore each part has various shapes. The parts having these various shapes have their own cutting and cutting surfaces, etc.
Further, it is formed by molding with a mold or the like.

[0003] For this reason, so-called cutting, such as cutting, cutting, drilling, and peeling, is required not only in the molding of the parts but also in the molding of the mold. Conventionally, mechanical cutting tools and cutting tools are used. , And mechanical and physical means such as fusing, plasma cutting, and arc cutting have been used.

[0004] However, cutting such as cutting by the conventional technique may be unfavorable in some cases, such as surface roughness and deterioration of the base material. Therefore, smooth and sharp without any influence on the base material by the jet energy for jetting high-pressure water into a beam. The so-called water jet, which forms a sharp cut surface, etc., is used for various processes such as cutting, cutting, peeling, and drilling. Abrasive water jets, etc., which spout out by mixing the body to increase the processing capacity, have also been put into practical use, and can be used for high-strength materials such as wood, synthetic resin materials, ceramics and metals. Has become available.

FIG. 6 schematically shows the structure of a nozzle head 1 of such an abrasive water jet according to a general embodiment. A water nozzle 3 having a predetermined high-pressure water and a particulate material of a mineral such as garnet sand are provided in a mixing chamber 2. The abrasive water jet nozzle 5 containing the powder and granules is connected to the supply port 4 of the
And is configured to be extended.

[0006]

Accordingly, the water nozzle 3 and the abrasive water jet nozzle 5
The cross section of the beam of the abrasive water jet is also generally circular, and as shown in FIG. Is to be processed by the abrasive water jet beam 8, so if a large-diameter water nozzle 3 or abrasive water jet nozzle 5 is used to increase the processing efficiency, it will be almost proportional to the square of the diameter. There is a problem that the required power, the supply amount of the abrasive powder, and the like increase.

[0009] As shown in FIG. 9, the recess 13 into which the projecting portion of the member 12 fits has a right angle portion at the corner thereof, or the square hole 14 shown in FIG. In the case of a workpiece processing mode in which it is required in detail that the corner portion 15 when processing the workpiece is a right angle, it is essential that the abrasive water jet nozzle 5 having a circular closed cross section cannot cope with it. There were serious disadvantages.

Therefore, as a method for increasing the processing speed and improving the processing efficiency, a countermeasure that has been conventionally considered is to form a plurality of abrasive water jet nozzle heads in a multi-layered manner in the cutting traveling direction. Method to use.

In such a multi-nozzle system, continuous multi-processing such as a kind of so-called sawing is performed, so that the processing efficiency can be improved to some extent.

Further, as a method of processing a corner portion at a right angle (a corner radius is extremely small), at present, a method using an abrasive water jet nozzle having the smallest possible diameter is used.

[0011]

However, in such a multiple-type multi-nozzle, as described above, the abrasive water jet nozzles are layered in the traveling direction, so that each of the The mutual positioning of the jet nozzles is of a fixed type. Therefore, as shown in FIG. 8, the abrasive water jet nozzles 9, 9,.
Are made to follow the processing direction 10 of the processing of the abrasive water jet nozzle so as to increase the processing efficiency. As the number of the abrasive water jet nozzles 9 increases, the more the abrasive water The width 11 of the cross section of the abrasive water jet nozzle 9 with respect to the processing direction 10 of the processing of the jet nozzles 9 is increased, so that the processing direction 10 of the processing of the abrasive water jet nozzle 9 and the processing surface 11 of the workpiece. As a result, there is a problem that it is difficult to sufficiently achieve the processing accuracy as designed and the yield of the material is poor.

On the other hand, the position and the inclination angle of each of the abrasive water jet nozzles 9 are changed over time according to the curvature of the abrasive water jet nozzle 9 in the traveling direction 10 by appropriate electronic control. Although it is theoretically possible to do so, there is a drawback that the control mechanism is actually complicated and the management operation is complicated.

Further, with respect to a mode in which a corner is machined at a right angle (or an acute angle) using a small-diameter abrasive water jet nozzle, it is inevitable to obtain a sufficiently small corner radius. It is necessary to use a small abrasive water jet nozzle diameter, and the linear processing efficiency is extremely reduced. In particular, in the case of abrasive, abrasive water due to the fine particle diameter of abrasive grains such as garnet sand mixed There were inconveniences, such as that the diameter of the jet nozzle could not be too small.

[0014]

The purpose of the invention of this application is to work with an abrasive water jet based on the above-mentioned prior art,
In particular, it is a technical issue to solve the problem of the processing direction when processing metal work, and while fully utilizing the advantages of abrasive water jets, processing efficiency is increased and fine processing accuracy is sufficiently improved. Therefore, it is an object of the present invention to provide an excellent abrasive water jet nozzle structure which has a sufficient degree of freedom in processing and which is beneficial to the application of processing technology in the machine equipment manufacturing industry.

[0015]

In order to solve the above-mentioned problems, the constitution of the invention of the present application, which has the above-mentioned object as a summary of the above-mentioned utility model registration claims, has been developed in order to solve the above-mentioned problems. , Such as garnet sand, mixed into a water jet, and jetted into a work (especially a metal work) as an abrasive water jet with a high processing ability to cut, cut, peel, drill, etc. When performing the processing, the abrasive water jet nozzle extending from the nozzle head is formed into a non-circular closed cross section such as an oval or a square, and the beam-shaped abrasive jetted into the non-circular closed cross-sectional shape When the water jet performs a predetermined processing on the workpiece, the water jet has a predetermined length on both sides on a plane along the processing direction of the processing of the abrasive water jet nozzle. The machining accuracy of the machined surface is improved, the cutting efficiency is increased, and when the advancing direction of the abrasive water jet nozzle is curved, the abrasive water jet nozzle is used as much as possible in the advancing direction of the machining. In this case, technical measures are taken so as to be processed along the design, and in the case of a square closed section, square hole processing and the like can be performed accurately and predetermined precision processing can be performed.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

It is to be noted that the same parts as those in FIG.

In the embodiment shown in the drawing, a water nozzle 3 and a supply port 4 for mixing a particulate material of a mineral such as garnet sand which increases the processing capacity are provided in the mixing chamber 2 in the same manner as the conventional general mode shown in FIG. An abrasive water jet nozzle 5 is connected to the chamber 2 and extends from the mixing chamber 2 to the workpiece. In the embodiment shown in FIG. 1, the abrasive water jet nozzle 5 '' Has a closed cross section formed in an elliptical shape (the cross section of the water nozzle 3 is also made to be an elliptical shape if necessary), and the abrasive water jet nozzle 5 of the nozzle moves in the processing direction 10 of the processing. It has parallel surfaces 16, 16 facing each other on both sides.

As a matter of course, the closed section has a major axis and a minor axis, and their ratio is appropriately selected in design.

In this embodiment, as shown in FIGS. 4 and 5, an abrasive water jet nozzle is
When a predetermined cutting process is performed on the workpiece 6 while moving the workpiece 5 ″ in the traveling direction 10, the beam-shaped abrasive water jet 8 ejected from the abrasive water jet nozzle 5 ″ is abrasive. Since the water jet nozzle 5 ″ is long along the processing direction 10 of the processing, the density is high, and the processing efficiency is increased as in the conventional multiple-type multi-type abrasive water jet nozzle. As long as the precision processing efficiency is good, the processing speed can be increased.

When the traveling direction 10 is curved, the elliptical parallel surface 16 of the cross section of the abrasive water jet nozzle 5 ″ is parallel to the tangential direction along the traveling direction of the processing of the processing portion. By forming in the posture, the distance between the processing progress direction and the processing surface can be kept tight.

By adopting the ratio of the major axis to the minor axis in a predetermined manner, it is possible to work with high precision even in square hole machining.

The embodiment shown in FIGS. 2 and 3 has a closed cross-section made of an abrasive water having a rectangular shape on both sides having a plane along the traveling direction 10 of machining of the abrasive water jet nozzle. Jet nozzle 5 "", 5
The embodiment shown in FIG. 2 has a rectangular cross section, and the embodiment shown in FIG. 3 has a square cross section.
And processing having a right-angled corner as shown in FIG. 10 can be performed with high accuracy.

Further, in the case of the embodiment of the abrasive water jet nozzle 5 '''having a rectangular cross section shown in FIG. 2, the processing speed can be increased in the same manner as the oblong cross section shown in FIG.

The feature of the invention of this application is that the inside shape of the abrasive water jet nozzle is made non-circular, and it goes without saying that the embodiment is not limited to the above embodiments. Make the outer shape circular,
Various modes can be adopted, such as increasing the thickness of the closed water jet nozzle at the corner or the end of the long axis of the closed cross section to improve the strength and wear resistance.

[0026]

As described above, according to the invention of this application, an excellent abrasive water jet nozzle capable of precisely forming a smooth machined surface without basically affecting the base material, Unlike the conventional circular closed cross section,
By adopting a non-circular closed cross-section abrasive water jet nozzle structure having a flat surface on both sides along the processing direction of the processing of the abrasive water jet nozzle, processing such as cutting of the same thickness is designed more than before. And high speed, and an excellent effect that is added to the improvement of processing efficiency.

Since the non-circular closed cross section of the abrasive water jet nozzle is formed in a square shape or the like, the density in the processing direction of the abrasive water jet jet is increased, thereby increasing the processing accuracy. The cutting effect can be improved, the cutting efficiency can be increased, and in the case of a square closed cross section, an excellent effect that square hole machining and the like can be performed and precision machining can be performed is exhibited.

Further, by forming the closed cross section into a square shape, it is possible to perform a square hole with a machining capability of fine particles such as garnet sand and a square hole in iron precisely, thereby improving the product accuracy. is there.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 5 are explanatory views of an embodiment of the invention of this application.

FIG. 1 is a sectional view of one embodiment.

FIG. 2 is a sectional view of another embodiment.

FIG. 3 is a sectional view of another embodiment.

FIG. 4 is a vertical sectional view of a work process of the work.

FIG. 5 is a plan view of the same.

FIG. 6 is a schematic sectional view of a conventional abrasive water jet nozzle.

FIG. 7 is a plan view of the processing based on FIG. 6;

FIG. 8 is a plan view of processing by a multiple-type multi-nozzle.

FIG. 9 is a perspective view of a cross-section of a processed part of a work.

FIG. 10 is a cross-sectional plan view of another processing of a work square hole.

[Explanation of symbols]

 1 Nozzle head 5 Abrasive water jet nozzle 10 Travel direction

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshikazu Ikemoto 3-1-1, Higashikawasaki-cho, Chuo-ku, Kobe City, Hyogo Prefecture Inside the Kobe Plant of Kawasaki Heavy Industries, Ltd. (72) Inventor Masamichi Yamaguchi Higashikawasaki, Chuo-ku, Kobe City, Hyogo Prefecture 3-1-1, Komachi, Kobe, Kawasaki Heavy Industries, Ltd. (56) References JP-A-2-212099 (JP, A) JP-A-63-267199 (JP, A) JP-A-3-184800 (JP, A A) JP-A-63-185467 (JP, A) JP-A-3-65700 (JP, U) JP-A-62-144200 (JP, U) JP-A-56-54693 (JP, U) -1788 (JP, B1)

Claims (2)

(57) [Scope of request for utility model registration] In the structure according to claim 1] Abrasive c <br/> O over terpolymers jet nozzle provided in the nozzle head is formed on the closed section, the closed cross section is formed in the non-round, the Aburei
It has a plane along the moving direction of the machining of the waterjet nozzle on either side, and the closed-sectional abrasive War
An abrasive water jet nozzle structure, characterized in that the dimension in the traveling direction of the turbojet nozzle is equal to or greater than the dimension in the direction perpendicular thereto. 2. The method according to claim 1, wherein said closed section is an abrasive water jet.
Abrasive water jet nozzle structure of utility model registration Claims paragraph 1, wherein the being in square cross section having a plane along the traveling direction of the processing of Tsu bets nozzles on both sides.