JPH0624858U - Eccentric rotation type water jet nozzle head - Google Patents

Abstract

(57) [Abstract] [Purpose] When performing grooving of a die of an abrasive water jet that has an inherently excellent forming function, the inclination angle of the side wall of the groove and the flatness of the bottom surface. Adjust so that the groove can be processed exactly as designed. [Structure] Holder 1 of an abrasive water jet nozzle head 1 which supports a high pressure water supply shaft 3 inside
Install the upper and lower eccentric bearings 15 'and 15' on the 4'adjustment bolt 2
2, 22 'are provided so as to be adjustable in lateral movement so that the turning inclination angle θ of the high pressure water supply shaft 3, that is, the nozzle 7, and the turning radius r of the tip thereof are adjusted independently as designed. . [Effect] When a groove 9 having a rectangular cross section of a work 8 of a mold is cut and formed by an abrasive water jet, a predetermined inclination angle θ of a side wall surface 12 ′ thereof is accurately set, and a flat bottom surface as designed is obtained. You can get 13 '.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

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

[0002]

[Prior art]

 As is well known, prosperous modern society bears a great deal of responsibility for science and technology, and in particular, it cannot be denied that it is built on the development of various mechanical devices.

[0003] Thus, in the equipments of such a mechanical device, various kinds of research and improvement have been accumulated, and there are few kinds of tools in a simple shape, and there are many kinds of combinations of a plurality of parts. Is complicated, and operation, control and management are complicated.

[0004] 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 wooden products, In most cases, resin molded products are also precise and complicated.

Not to mention the direct molding of such parts, the precision of the precision is also strictly required including the undercut part, the spigot part and the like of the mold used for the molding process. Therefore, not only the functional sophistication of machinery and equipment but also the good external appearance of design and high designability have recently been demanded. Therefore, it is used for molding and processing of these products. The means for cutting, cutting, drilling, peeling, separating, etc. that are used are not limited to the conventional simple mechanical forming process, but means such as beam cutting and fusing have come to be used. In view of the processing roughness of the work to be processed, the influence on the base material, etc., the high pressure water is jetted onto the work to be processed at a very high speed in recent years instead of the conventional means. JP-A-63-41200 Technology such as abrasive water jet, which has improved processing ability by adding and mixing abrasive powder granules such as garnet sand to water jet and high pressure water as seen in the invention, has been put to practical use. , And various improvements are being studied.

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

[0007] Recently, a technology has been developed to make the diameter of the water jet extremely small, so that cutting with an extremely high cutting width is performed and the definition of the cutting surface is improved. However, for example, in the case of cutting a groove 9 having a rectangular cross section in a mold 8 as shown in FIG. 5, by gouging like cutting, one water jet from the nozzle 7 does not finish in one pass. Since it is impossible, as shown in the plan view of FIG. 6, the nozzle 7 is made to rotate while revolving in a non-rotating manner while revolving, and the cross-sectional rectangular shape shown in FIG. Means such as housing-like grooving have been adopted.

[0008]

[Problems to be solved by the device]

 However, in the groove forming process of the seed groove 9, it is desired by design that the corner 11 as shown in FIG. 7 is a right angle, and the side surface 12 and the bottom surface 13 are smooth flat surfaces. However, as described above, by rotating the nozzle 7 in a non-revolving manner in an orbital manner and advancing, as shown in FIG. 8, the groove 9'has a so-called caries-like cross section and the side surface 12 'has a cliff-like shape. There is a problem that the bottom surface 13 ′ is inclined and the bottom surface 13 ′ projects toward the nozzle 7 side, and the groove 9 along the design cross section cannot be formed.

Therefore, in order to deal with this, as shown in FIG. 10, the cylindrical holder 14 which houses the high pressure water supply shaft 3 of the nozzle head 1 ′ is made relatively rotatable and is movable in the radial direction. By connecting the high-pressure water supply shaft 3 to the flexible joint 15 'through the eccentric bearing 15, the nozzle 7 is made displaceable as shown in Fig. 9, and the water jet nozzle 7 is revolved in a non-rotating manner. A technique for forming a groove 9'having a carious cross section as shown in FIG. 8 into a groove 9 having a rectangular cross section shown in FIG. 7 as much as possible by changing the turning radius has been developed. As shown in FIG. 9, the turning radius r of the tip of the nozzle 7 is determined from the relationship between the holder 14 and the fulcrum 18 by the nozzle tilt angle, and the nozzle tilt angle θ and the turning radius r are independent. I can't change it, so Manner there is a problem that can not be the groove 9 of rectangular cross-section as shown in FIG.

[0010]

[The purpose of the device]

 The purpose of the invention of this application is to solve the problem 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 conventional technology, and to make full use of the potential advantages of the water jet. While making the best use of it, 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. It is intended to provide an excellent eccentric rotary type water jet nozzle head which can be improved to improve the application of processing technology in the machine manufacturing industry.

[0011]

[Means and actions for solving the problem]

 In order to solve the above-mentioned problems, the composition of the invention of this application, which is based on the above-mentioned utility model registration claim, is intended to solve the above problems by using an abrasive water jet or the like, parts of molds, machinery, equipment, etc. When performing forming such as cutting, cutting, peeling, drilling, etc., in order to perform grooving such as predetermined side slope, flat bottom, etc., it is provided in the housing of the equipment frame of the water jet nozzle head. A holder is provided so as to be rotatable relative to a high-pressure water supply shaft of a predetermined pressure so that the rotary drive shaft can rotate via gears, splines, etc. Eccentric bearings are provided in at least two upper and lower stages along the supply shaft to support the high-pressure water supply shaft, and during operation, the eccentric bearing is adjusted in a predetermined manner by an adjusting bolt or the like via a holder. When the fulcrum of the high pressure water supply shaft is moved and the turning radius of the nozzle tip is changed to a predetermined value, and the holder is rotated by the rotary drive shaft, the high pressure water supply shaft is non-rotating through the eccentric bearing. Therefore, the water jet grooving shape has a predetermined side wall inclination angle and a flat inclination angle. The technical measures were taken so that the bottom surface was molded.

[0012]

【Example】

 Next, one embodiment of the invention of this application will be described below with reference to FIGS. 1 to 3. It should be noted that parts that are the same as those in FIG. 4 and subsequent figures will be described using the same symbols.

Reference numeral 1 '' is an eccentric rotation type water jet nozzle head, which is the gist of the invention of this application, and this embodiment is an abrasive water jet type embodiment, as shown in FIG. This is used for grooving and cutting a groove 9 having a rectangular cross section of a die 8 for rib processing into a gouging type. As shown in FIG. The grooving process is performed in an envelope locus by advancing while turning.

In the water jet nozzle head 1 ″, the drum-type housing 19 is fixed to a device frame (not shown) via 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. Type eccentric bearings 15 ', 15' 'are supported, the upper part of which is connected to a predetermined high pressure water source through a flexible connector 15 and the lower end is connected to an abrasive supply tube 5 such as garnet sand. It is connected to the chamber 4 and further connected to the nozzle 7 at the tip thereof.

Further, covers 21 and 21 ′ are detachably provided on the upper and lower portions of the housing 19.

As shown in FIG. 3, the eccentric bearings 15 ′ and 15 ″ are made to move laterally inward and backward in a radial groove, and are respectively tightened and loosened adjustment bolts. The high pressure water supply shaft 3 is eccentrically laterally displaced from the holder 14 'by the blades 22 and 22'. Therefore, in the invention of this application, the turning inclination angle θ of the nozzle 7 shown in FIG. The swirling radii r of the parts 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 having a cross-sectional shape that tends to form a lateral groove 9'having a tooth-cavity-shaped cross section is used. It is possible to adjust the inclination angle of 'to a predetermined degree, to independently adjust the degree of planar shape of the bottom surface 13', and to adjust them 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 ′, By adjusting the adjustment bolts 22 and 22 'of 15' 'forward and backward, and adjusting them loosely, it is possible to perform a non-rotational revolving revolution at a predetermined revolving tilt angle.

Therefore, in the abrasive water jet nozzle head 1 ″ of the invention of this application, the inclination angle of the side wall surface 12 of the concave grooves 9 and 9 ′ and the flatness of the bottom surface 13 as shown in FIGS. 7 and 8. The degree of swirling can be determined freely, and the swivel inclination angle θ and the swivel radius r of the tip of the nozzle 7 shown in FIG. Referring to the data, by setting the inclination angle and the turning radius r through the pushing-in by tightening the adjusting bolts 22 and 22 'and the advancing and retreating by loosening, the concave grooves 9 and 9'having a predetermined rectangular cross section are formed. It can be molded.

In the above-mentioned configuration, 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 accumulated experimental data as described above, etc. By applying the data to the design cross-sectional shape of the concave groove 9 of the mold 8, the upper and lower eccentric bearings 15 ′ and 15 ″ are tightened with the adjusting bolt 22 for tightening and the adjusting bolt 22 ′ for loosening. By removing the cover 21 (or adjusting it through a preformed working window to effect a predetermined amount of lateral movement relative to the holder 14 '), thereby removing the high pressure water supply shaft 3 of the design. The inclination angle and the turning radius r of the tip of the nozzle 7 are set, and when the rotary drive shaft 16 is rotated by a predetermined increase / decrease, the rotary drive force is applied to the holder 14 ′ via the gear and spline mechanism 17. Upon being transmitted, the holder 14 'starts to rotate steadily with respect to the apparatus frame, and at the same time, when high pressure water having a predetermined pressure is supplied from the high pressure water source, the high pressure water is supplied via the flexible connector 15 to the high pressure water supply shaft 3 Is mixed with abrasive powder particles such as garnet sand which are supplied from the side in the mixing chamber 4 and is jetted from the nozzle 7 into a jet having a small diameter of a set diameter, which is a mold for the work. Erupted to 8.

Therefore, as shown in FIG. 6, the holder 14 ′ is swung at a predetermined speed while being swung at a predetermined speed with a predetermined gear ratio, whereby the nozzle 7 is swung, and the nozzle 7 is depressed by the envelope trajectory of the jet. The groove 9 is formed.

Thus, in the forming process, the high pressure water supply shaft 3 has a predetermined inclination angle θ due to the lateral displacement through the eccentric bearings 15 ′ and 15 ″ based on the input data, and the nozzle Since the turning radius r of the tip of 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 formed as designed by the input data. The groove 9'is formed.

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

By doing so, the shapes of the side wall surfaces 12, 12 ′ and the bottom surfaces 13, 13 ′ of the recessed grooves 9, 9 ′ shown in FIGS. 7 and 8 are formed as designed, and accordingly, the mold The rib grooves 9 and 9 ′ for rib forming and molding 8 are accurately formed as designed.

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

It should be noted that the embodiment of the invention of this application is not limited to the above-described embodiment, but the eccentric bearing is adjusted in the horizontal direction as in the above-described embodiment, and the vertical direction and the axial direction are changed. Various modes such as enabling adjustment of displacement of

Further, the application target is not only for the abrasive water jet, but it can also be used for normal water jet molding processing, and the processing target is not only for mold molding but for general mechanical parts. It is needless to say that it can be applied to molding processing and can also be used for molding processing on wood products and resin molded products.

As a condition of use, it is needless to say that the abrasive can be used not only in dry use but also in wet use.

Although the displacement movement adjustment of the eccentric bearing may be manually performed as a design change, it is also within the scope of a design change that is ordinary to those skilled in the art to use an electric system or a remote control system. Of course, it can be easily achieved.

[0029]

[Effect of device]

 As described above, according to the invention of this application, basically, water such as an abrasive water jet capable of performing a desired forming process such as cutting, cutting, drilling, and peeling is largely independent of the quality, shape, and peripheral conditions of the work. In a device for jetting, 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 swirl radius of a nozzle tip are eccentric bearings. Displacement and movement can be adjusted independently of each other via a small-diameter water jet, which makes it possible to perform high-precision grooving, etc. It has an excellent effect that molding can be performed reliably.

Therefore, the original advantages of water jets such as abrasive water jets are fully exerted, and as a result, the reliability of products such as metal products is improved, and the operation and durability of the product as designed are achieved. It has the effect of improving.

As the holder rotates, the nozzle, that is, the high pressure water supply shaft, non-rotatably revolves around the predetermined eccentric amount, so that the high pressure water supply in the mixing chamber is supplied. The connection 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 does not complicate the structure of the precise mixing chamber or nozzle and the original function of the water jet. There is also an effect that it can fully fulfill.

[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 (4)

[Scope of utility model registration request] 1. An eccentric rotary type in which a holder mounted on a high pressure water supply shaft so as to be relatively rotatable is linked to a rotary drive shaft, and an eccentric bearing for supporting the high pressure water supply shaft is movably installed. In a water jet nozzle head, the eccentric bearing is arranged in at least two stages in front and back along a high pressure water supply shaft, an eccentric rotary water jet nozzle head. 2. An eccentric rotary water jet nozzle head according to claim 1, wherein the eccentric bearing is linked to a lateral movement mechanism. 3. The eccentric rotary water jet nozzle head according to claim 1, wherein the eccentric bearing is linked to a vertical movement mechanism. 4. The eccentric rotary water jet nozzle head according to claim 1, wherein the high pressure water supply shaft is provided in front of the abrasive mixing chamber.