JP2507296Y2 - Eccentric rotating water jet nozzle head - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The disclosed technology belongs to the technical field of the structure of a nozzle head of a water jet nozzle for cutting a metal mold or the like.

[0002]

2. Description of the Related Art As is well known, a prosperous modern society has a great burden on science and technology, and in particular, it cannot be denied that it is built on the development of various mechanical devices.

As a result, various kinds of research and improvement have been accumulated in the machines of such mechanical devices, and there are few such tools having a simple shape, and there are many combinations of a plurality of parts, and their structures are also large. It is complicated and complicated in operation, control and management.

Therefore, each component of such a machine device has an extremely delicate flat surface, curved surface, and uneven portion. Therefore, the shapes of these components are not only direct metal products, but also wood products and resins. In most cases, molded products are also precise and complicated.

Not to mention the direct molding of such parts, the precision of the precision including the undercut portion, the spigot portion and the like of the mold used for the molding process is strictly required. , Not only the functional sophistication of machinery and equipment, but recently, good external appearance and high designability are also required for design, and therefore, it is used for molding of these products. Means such as cutting, cutting, punching, peeling, and separating are not limited to the conventional simple mechanical forming, but beam cutting, fusing, and the like have come to be used. That is, in view of processing roughness of the workpiece, heat influence on the base material, etc., high pressure water is jetted at a very high speed to the workpiece in recent years instead of conventional means, a so-called, for example, JP 63
The technology such as an abrasive water jet in which the processing ability is improved by adding and mixing abrasive powder granules such as garnet sand to the water jet or high pressure water as seen in the invention has been researched and developed. Since it has been put to practical use, various improved techniques are being studied.

That is, as shown in FIG. 4, for example, in the abrasive water jet nozzle head 1, high pressure water 2 having a predetermined high pressure is supplied to the mixing chamber 4 via the high pressure water supply shaft 3. Abrasive powder particles 6 such as garnet sand supplied through the abrasive supply port are uniformly mixed in the mixing chamber 4, and the nozzle 7
It is ejected from the above and collided with a work of a workpiece (not shown) to perform predetermined cutting, peeling, cutting and the like by its kinetic energy.

Recently, a technique for making the diameter of the water jet extremely small has been developed, so that cutting with an extremely high cutting width is performed and the fineness of the cutting surface is also improved. However, for example, when the groove 9 having a rectangular cross section in the die 8 as shown in FIG. 5 is cut by gouging, it is impossible to finish it in one pass with one water jet from the nozzle 7. Therefore, as shown in the plan view of FIG. 6, the nozzle 7 is non-rotatably rotated and revolved while advancing, and due to the overlapping envelope loci of the water jets, a gouging groove having a rectangular cross section shown in FIG. Means such as digging have been adopted.

[0008]

However, in the groove forming process of the seed groove 9, the corner 1 as shown in FIG. 7 is formed.
1 is a right angle, and the side surface 12 and the bottom surface 13 are preferably designed to be smooth planes. However, as described above, the nozzle 7 is rotated non-rotatively in an orbital manner. By advancing, as shown in FIG. 8, the groove 9 '
Has a defect that the side surface 12 'is inclined like a cliff and the bottom surface 13' projects toward the nozzle 7 side in a so-called tooth decay shape, and there is a drawback that the groove 9 along the designed cross section cannot be formed. It was

In order to cope with this, for example, as shown in FIG. 10 as in the invention of Japanese Patent Laid-Open No. 63-28598, a cylindrical holder 14 having a high pressure water supply shaft 3 of a nozzle head 1 ', as shown in FIG. Of the high pressure water supply shaft 3 through an eccentric bearing 15 that is rotatable relative to
Nozzle to the flexible joint 15 '.
As shown in FIG. 9, the fulcrum is made displaceable so that the water jet nozzle 7 revolves in a non-rotating manner and revolves, and the revolving radius is changed to form a groove 9'having a carious cross section as shown in FIG. Although a technique has been developed in which the groove is formed as much as possible in the groove 9 having a rectangular cross section, as shown in FIG.
The turning radius r of the tip of the nozzle 7 is determined from the relationship between the fulcrum 18 and the length of the holder 14 and the nozzle tilt angle, and the nozzle tilt angle θ and the turning radius r cannot be changed independently. There is a problem that the groove 9 having a rectangular cross section as shown in FIG. 7 cannot be formed.

[0010]

The purpose of the invention of the present application is to solve the problems of the nozzle head related to the molding process of the mold etc. by the nozzle of the water jet based on the above-mentioned prior art, and to solve the potential problem of the water jet. While fully utilizing these advantages, the nozzle is non-rotatably swiveled and revolved, and the swivel radius of the nozzle tip and swivel fulcrum can be adjusted independently of each other. An object of the present invention is to provide an excellent eccentric rotary type water jet nozzle head which can increase the degree of freedom of the inclination angle of the flat bottom surface and side surface of the groove and which is useful in the field of processing technology application in the machine manufacturing industry. .

[0011]

[Means and Actions for Solving the Problems] In order to solve the above-mentioned problems, the structure of the invention of the present application, which is based on the above-mentioned purpose and has the scope of the above-mentioned utility model registration claim, uses an abrasive water jet or the like. When performing molding such as cutting, cutting, peeling, drilling, etc. of molds and parts of machinery, equipment, etc. The holder provided in the housing of the device frame of the nozzle head is provided so as to be rotatable relative to the high-pressure water supply shaft of a predetermined pressure, and the rotation drive shaft can be rotated through gears, splines, etc. In the holder, eccentric bearings are provided in at least two upper and lower stages along the high pressure water supply shaft to support the high pressure water supply shaft, and during operation, adjustment is performed via the holder. Adjust the eccentric bearing in a predetermined by belt or the like moves the fulcrum of high pressure water supply shaft is moved to vary the turning radius of the nozzle tip in a predetermined, and, by rotating the holder by the rotation drive shaft,
Through the eccentric bearing, the high-pressure water supply shaft is non-rotationally revolved to perform a reciprocating motion at a predetermined inclination angle and a turning radius of the nozzle tip, and therefore, a water jet groove shape. Is a technical means that allows the molding process to be performed with a predetermined sidewall inclination angle and a flat bottom surface.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of the invention of this application will be described below with reference to FIGS. still,
Portions that are the same as in FIG.

1 "is an eccentric rotation type water jet nozzle head which is the subject of the invention of this application, and this embodiment is an abrasive water jet type embodiment, and as shown in FIG. This is used for grooving and cutting a concave groove 9 having a rectangular cross section of a working die 8 into a gouging type. As shown in FIG. 6, a nozzle 7 is provided and its tip is swung to a predetermined radius. While making progress, grooving is performed in an envelope locus.

In the water jet nozzle head 1 '', the drum type housing 19 is fixed to the apparatus frame (not shown) through the bracket 20, and a bearing is provided inside the housing 19. A drum-shaped holder 14 'is rotatably supported via a through-hole, and a high-pressure water supply shaft 3 of a predetermined pressure is concentrically supported in its inner cavity so as to be relatively rotatable. Is supported by eccentric bearings 15 ', 15''of which the upper part is connected to a predetermined high pressure water source through a flexible connector 15 and the lower end is connected to a mixing chamber 4 connected to an abrasive supply tube 5 such as garnet sand. It is connected and further connected to the nozzle 7 at the tip thereof.

The cover 2 is provided on the upper and lower parts of the housing 19.
1, 21 'are detachably provided.

As shown in FIG. 3, the eccentric bearings 15 ′ and 15 ″ are movable in the radial groove in the lateral direction, and are respectively tightened and loosened adjustment bolts 22. , 22 'eccentric the high pressure water supply shaft 3 laterally with respect to the holder 14'. Therefore, in the invention of this application, the turning inclination angle θ of the nozzle 7 shown in FIG. The turning radii r can be adjusted independently of each other. Therefore, as shown in FIG. 8, in the case of an orbital water jet nozzle, the side surface 12 ′ of the cross-sectional shape which is apt to form the lateral groove 9 ′ having a tooth-cavity cross-section. The inclination angle can be adjusted to a predetermined level, the planar shape of the bottom surface 13 'can be adjusted independently of each other, and they can be adjusted together.

Thus, the holder 14 'is given a rotational force by the gear and the spline mechanism 17 between the rotary drive shafts 16, so that the high-pressure water supply shaft 3 has the upper and lower eccentric bearings 15', 15 ''. The adjustment bolts 22 and 22 'are tightened forward and backward, and are loosely adjusted to perform a non-revolving revolution state revolution at a predetermined revolution inclination angle.

Therefore, in the abrasive water jet nozzle head 1 '' of the invention of this application, FIGS.
The inclination angle of the side wall surface 12 of the concave grooves 9 and 9'as shown in FIG.
The degree of flatness of the bottom surface 13 can be freely determined, and the turning inclination angle θ shown in FIG.
By accumulating the turning radius r of the tip of the nozzle 7 as data, reference is made to the data when forming a predetermined groove, and the adjustment bolts 22 and 22 'are pushed through by tightening and loosened by moving forward and backward. By setting the inclination angle and the turning radius r independently of each other, it is possible to form the grooves 9 and 9'having a predetermined rectangular cross section.

In the above-mentioned structure, when performing the grooving of the concave groove 9 having a rectangular cross section with respect to the die 8 for rib processing shown in FIG. 5 by the abrasive water jet, the experimental data accumulated as described above is used. Data is applied to the design cross-sectional shape of the concave groove 9 of the mold 8, and the upper and lower eccentric bearings 15 'and 15''are tightened with the adjusting bolt 22 and the loosening adjusting bolt 22' with the cover 21 before the processing. Is removed (or adjusted through a preformed working window to effect a predetermined amount of lateral movement relative to the holder 14 '), thereby allowing the tilt angle of the high pressure water supply shaft 3 and the nozzle 7 of this design. The turning radius r of the tip is set, and when the rotary drive shaft 16 is rotated by a predetermined increase / decrease, the rotary drive force is transmitted to the holder 14 ′ via the gear and spline mechanism 17. , The holder 14 'is started to rotate in a predetermined relative apparatus frame, together, when supply high pressure water of a predetermined pressure from a high pressure water source, the flexible connector 1
The high pressure water is supplied to the high pressure water supply shaft 3 via 5 and is mixed in a predetermined manner with the abrasive powder granules 6 such as garnet sand supplied from the side in the mixing chamber 4 to set the diameter from the nozzle 7. Is jetted as a small-diameter jet, and is jetted to the die 8 of the work.

Therefore, as shown in FIG. 6, the holder 14 'is swung at a predetermined speed while swiveling at a predetermined speed with a predetermined gear ratio, whereby the nozzle 7 swivels, and the concave groove is formed by the envelope locus of the jet. 9 is formed.

In the forming process, the high pressure water supply shaft 3 is inclined at a predetermined inclination angle θ by the lateral displacement via the eccentric bearings 15 'and 15''based on the input data.
Further, since the turning radius r of the tip of the nozzle 7 is determined, the inclination angle of the side wall surface 12 'of the groove 9'and the flatness of the bottom surface 13' shown in FIG. 8 are designed by the input data. The groove 9'is formed as it is.

When changing the sectional shape of the concave groove 9'during the forming process, the operation is temporarily stopped, or the adjusting bolts 22 and 22 'are tightened or loosened from the housing 19 while continuing the process according to the design. The lateral displacement of the eccentric bearings 15 ', 15''is adjusted to adjust the swivel angle θ of the high pressure water supply shaft 3, that is, the nozzle 7, and the swirl radius r of the tip to continue grooving. .

By doing so, the side wall surfaces 12 and 12 'and the bottom surfaces 13 and 1 of the concave grooves 9 and 9'shown in FIGS.
The shape of 3'is formed as designed, therefore the mold 8
The concave grooves 9 and 9'for forming and processing the ribs are accurately formed as designed.

It goes without saying that the control and adjustment of the groove width and the groove depth are within the scope of design change easily for those skilled in the art.

Of course, the embodiment of the invention of this application is not limited to the above-mentioned embodiment, and instead of adjusting the eccentric bearing laterally as in the above-mentioned embodiment, the eccentric bearing can be adjusted in the longitudinal and axial directions. Various modes such as enabling the displacement adjustment can be adopted.

The object of application is not only for the abrasive water jet, but can also be used for ordinary water jet molding, and the object of processing is not only die molding but also ordinary machine part molding. It is needless to say that it can be applied to the above, and can also be used for forming processing for wood products and resin molded products.

As a use condition, not only the dry use of the abrasive but also the wet use can be used.

Although the displacement movement of the eccentric bearing may be manually adjusted in the design modification, it is easy for a person skilled in the art to change the displacement movement adjustment of the eccentric bearing manually or to use the remote control method. Of course, what you can do is:

[0029]

As described above, according to the invention of this application, an abrading device capable of performing a desired forming process such as cutting, cutting, punching, and peeling is basically not so much influenced by the quality, shape, and peripheral conditions of the work. In a device that performs a water jet such as a shiv water jet, a high pressure water supply shaft supported by the nozzle head, that is, a swivel fulcrum of a nozzle integrally extended to the high pressure water supply shaft, and a nozzle tip. Since the turning radius can be adjusted independently of each other via eccentric bearings, the sidewall angle and bottom flatness can be controlled as designed, which enables highly accurate grooving etc. through a small diameter water jet. Therefore, the excellent effect that the molding process with high accuracy can be surely performed is achieved.

Therefore, the original advantages of the water jet such as the abrasive water jet are fully exerted, and as a result, the reliability of the product such as the metal product is improved, and the operation and durability of the product as designed are improved. There is an effect of doing.

As the holder rotates, the nozzle, that is, the high-pressure water supply shaft, revolves non-rotatively to the revolution due to the predetermined eccentricity, so that the high-pressure water supply in the mixing chamber is performed. The engagement between the shaft and the abrasive material supply tube such as garnet sand does not involve a complicated mechanism such as a swivel joint, and therefore the original function of the water jet is achieved without complicating the structure of the precise mixing chamber and nozzle. There is also the effect that it can be fully fulfilled.

[Brief description of drawings]

FIG. 1 is an overall schematic vertical sectional view of an embodiment of the invention of this application.

FIG. 2 is a schematic mechanism diagram of the same.

FIG. 3 is a sectional view of the eccentric bearing portion.

FIG. 4 is a side view of a partial nozzle head of an abrasive water jet.

FIG. 5 is a cross-sectional view of a mold of a work.

FIG. 6 is a schematic diagram of an envelope trajectory of a nozzle.

FIG. 7 is a design cross-sectional view of grooving.

FIG. 8 is an actual processing cross-sectional view of grooving.

FIG. 9 is a schematic diagram of revolution revolution of a nozzle.

FIG. 10 is a schematic view of a conventional mode eccentric rotary water jet nozzle head.

[Explanation of symbols]

 3 High pressure water supply shaft 14 'Holder 16 Rotation drive shaft 15', 15 '' Eccentric bearing 1 '' Eccentric rotation water jet nozzle head 22, 22 'Lateral movement mechanism 4 Abrasive mixing chamber

Claims (1)

(57) [Scope of utility model registration request] 1. A holder externally rotatably mounted on a high pressure water supply shaft is linked to a rotary drive shaft, supports the high pressure water supply shaft, and is linked to a lateral movement mechanism.
In an eccentric rotary water jet nozzle head in which an eccentric bearing associated with the eccentric bearing is movably installed , the eccentric bearings are arranged in at least two front and rear stages along a high pressure water supply shaft, and Coordinate eccentricity
The eccentric bearing at the rear stage can be freely adjusted to rotate the tip of the jet.
Adjustable radius and tilt angle to be set independently
Eccentric rotating water jet nozzle head, characterized in that it is.