JPS58223560A - Liquid honing method and liquid injection device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention can widen the surface area of materials and surfaces to be ground, such as steel plates.

It relates to a liquid honing method for grinding or cleaning a disk ring, and a liquid jetting device used to carry out this method, and in particular to forming a liquid film on a fan-shaped liquid film by colliding two high-pressure liquids jetted in the form of a liquid beam. The present invention also relates to a liquid honing method and a liquid jetting device that can supply a slurry containing an abrasive material from the outside to at least one side of the liquid film, thereby achieving uniform grinding with a large grinding force and simplifying maintenance.

Conventionally, as this type of liquid honing method and device, the ones shown in FIGS. 1 and 2 are known. The one shown in FIG. 2 is an invention described in Japanese Patent Publication No. 55-3103 , the one shown in FIG. 1 is a known technique that is also described in the publication. The configuration of FIG. 1 will be described repeatedly here. A nozzle block 1 is provided with a supply port for high-pressure water P and a slurry S containing an abrasive material, and the high-pressure water P is supplied to a target a predetermined distance apart through a nozzle tyrannometal. It is arranged so as to have an intersection point ft on the abrasive material 3, and has the following drawbacks.

(1) Although it is surrounded by slurry or high-pressure water sedge and is accelerated, the acceleration does not reach the center, resulting in poor grinding efficiency.

(2) In case of slurry clogging 1. Nozzle block 1
It is necessary to separate the equipment from the slurry supply device, and the harsh environment makes it difficult to work and causes problems in terms of maintenance.

In addition, in the one shown in Fig. 2, a flat slug nozzle 5 is attached to the high-pressure water supply pipe 4, and slurry S is supplied from the slurry supply pipe 6 to the flat slag ray sprayed from this nozzle.
Unlike conventional spot nozzles, this nozzle is said to be extremely efficient and capable of uniform surface processing in the width direction. However, as a practical matter, it is clear that there are the following drawbacks.

(1) The impact force of high-pressure water on the material to be ground due to flat spray is reduced in equidistant ML when the pressure and water volume used are the same, compared to that in Fig. 1.

Therefore, it is effective when the distance is relatively short, around 100 mm, but when grinding steel plates, etc., the steel plates are usually ground while being transferred, so there may be defects in shape or flapping.
L = 400 If the long distance is not maintained completely, threading will be difficult and damage to the nozzle will occur during threading. However, over a long distance, the grinding ability is significantly lower than that of the VC shown in Fig. 1 because flat spray is used.

(2) Because it is a flat spray, there is a difference in the impact force on the material to be ground between the edges and the center.This difference makes it necessary to use multiple nozzles offset in the width direction, especially when completely grinding a wide material. However, it is the cause of uneven grinding and uniform surface finishing cannot be expected.

Therefore, in view of the problems in conventional liquid honing, the inventors of the present invention have conducted intensive research and have actively utilized the phenomenon of forming a stable and high-speed liquid film by colliding two liquid beams. The present invention has been devised to effectively solve all of the above problems.

Therefore, the purpose of the present invention is to focus on two adjacent points! l
l High-pressure liquid is injected as a liquid beam in directions that intersect with each other, and the liquid beams collide with each other on the upstream side of the workpiece to form a fan-shaped liquid film, and a slurry IJ containing abrasive material is formed on at least one side of this liquid film. Even if the distance to the material to be ground is long, the grinding force is large and uniform grinding is possible.
The present invention provides a liquid honing method and a liquid injection device that can simplify maintenance.

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 3 is a schematic cross-sectional view showing an example of the structure of a single nozzle terminal 10 that is sprinkled on the tip of a liquid ejecting device implementing the method of the present invention. As shown in the figure, the nozzle terminal 10 is
A disk-shaped nozzle tip 12 is inserted into one end of the cylindrical body 11, which is open at both ends, through a QIJ ring 13 for sealing the high-pressure liquid, and then a cylinder with a circular window in the center is inserted. It is fixed by tightening with f14, and a thread groove 15 for fitting the above-mentioned casso 14 is formed on the outer periphery of one end, and a thread groove 15 for mounting is formed on the outer periphery of the other end. As shown in FIG. 4, the nozzle tip 12 injects two high-pressure liquids flowing into the cylindrical body 11 as liquid beams B, and the directions of these injections are directed at eight points in the front so as to cross each other. , two nozzles 16 formed in a cylindrical or conical pattern, the angle of difference between the nozzles 16 is θ, and the nozzle interval is it.

FIG. 5 shows a schematic configuration of a basic liquid honing device that combines a liquid ejecting device IT equipped with such a nozzle terminal 10 and a slurry supply means 18 provided separately. The liquid ejecting device 17 is composed of a chamber lock 19 and the nozzle terminal 10 described above. The channel gun lock 19 is a closing plate (1Qfdf) with a mounting screw hole in the center on the -I11 side to close the opening, and a high-pressure liquid with an appropriate pressure and flow rate is supplied from the high-pressure pump (not shown) in the other direction. 7 langes 21'&- of the pressure liquid supply pipe to which P is supplied
A chamber 22 is formed into which the high-pressure liquid is supplied. The other end of the nozzle terminal 10 is screwed into the mounting screw hole formed on one side of the chamber block 19 so as to communicate with the chamber 22, so that the nozzle terminal 10 can be detachably attached to the chamber block 19. It has become. As shown in the figure, the liquid ejecting device 17 configured in this manner is appropriately directed diagonally above the workpiece C to be ground so that the liquid beam B jetted from the nozzle terminal 10 is efficiently projected onto the workpiece C7C. It is held and fixed at a predetermined distance I4- by means of. On the other hand, the slurry supply means 18 faces the liquid injection device 11, and on the upstream side of the liquid beam B reaching the workpiece C, the slurry S containing the abrasive material supplied from a slurry supply pump (not shown) is supplied to the liquid beam B. The slurry outlet 23t is fixed diagonally downward by appropriate means so as to be supplied to one side of the slurry outlet 23t. Note that the material to be ground C has a width direction perpendicular to the plane of the paper, and the direction of conveyance is indicated by an arrow 2.

The operation of the basic liquid honing device of the present invention configured as described above will be described.

Figure 6 shows how two liquid beams B injected from the nozzle terminal 10 at an intersection angle θ collide at point e, and a flat fan-shaped liquid film is formed from this point in the injection direction. .

This phenomenon can be easily explained by the fact that when two liquid beams face each other and collide head-on, a disc-shaped liquid film is formed on a plane perpendicular to the liquid beam direction at the eccentric point. It can be inferred. In the present invention, in order to impart directionality to the formed rod film, the opposing angle of the liquid beam,
That is, the intersection angle θ is 180° or less. 7 to 9 are vector representations of the front angle, side angle, and top view of the velocity of the liquid beam B at the point e when the intersection angle θ is -0 As is clear from this, each liquid e- speed V. can be divided into a component Vy in the perpendicular direction to the material to be ground CIC and a component vx in the horizontal direction at the collision point e, of which the horizontal component vx cancels each other out and becomes zero, and the component in the perpendicular direction ■ y is superimposed and multiplied by 2, i.e. v == 2vy = 2v, cts i. Then, the liquid film with this velocity v is projected from the point e toward the workpiece CK, replacing the liquid beam B, on a plane perpendicular to the straight line m connecting the nozzles 16 with an angle α extending 9. It will be done. The spread angle α of this liquid film varies depending on the distance between the nozzles 16 and the angle θ of the distance between the nozzles 16 and the pressure and volume of the high-pressure liquid, and the velocity V of the liquid film varies depending on the distance θ as shown in FIG. It changes depending on the function, that is, the intersection angle θ. The above-mentioned nozzle meter, which determines the spreading angle α of the liquid film and its velocity (2), is appropriately determined in accordance with the projection distance shown in FIG. 5 so that the amount of grinding is maximized. In this way, the liquid beam B injecting the high-pressure liquid P from two adjacent points in mutually intersecting directions collides at point e on the upstream side to the material to be ground CK, forming a liquid film that spreads in a fan shape from this point.
A grating supply hand is placed on one side of the liquid film (top side in Figure 5).

Slurry S is supplied from stage 1 & 1 so as to be completely on top of it.

All of the slurry S supplied onto the liquid film is captured because the liquid film is moving at twice the speed of the liquid beam B, and the liquid film is spreading at an angle α. The liquid is uniformly diffused, and the surface of the material to be ground C is machined by the same action as the conventional liquid honing technology. Therefore, the supplied slurry +7S spills from the water film and contributes to the grinding by causing "ringing," and the diffusion of the slurry S also makes it possible to measure the effective acceleration of the abrasive material in the slurry S. By determining the optimal intersection angle θ according to the projection distance between the material C to be ground and the nozzle terminal 10, it is possible to form a liquid film with a large collision force and increase the amount of grinding as much as possible. Although the slurry S was supplied from the upper surface of the liquid film in the above embodiment, it is also possible to spray the slurry S from the lower surface along the liquid film DK and to supply the slurry S from the lower surface, since the speed of the liquid film is large. It is possible.Also, even if the liquid jet device 11 is fixed diagonally below the material to be ground C and the liquid beam B itself is directed upward, a liquid film will be formed in the same way, so the direction of the liquid jet can be adjusted depending on the direction. The examples are not limited.

Next, two specific examples of the liquid ejecting device described above will be listed and described in more detail.

FIGS. 11 and 12 show an example of this, and as shown in the figure, a blockage plate 26 bolted to the front surface of the chamber block 25 is attached to a block plate 26 in the width direction (in the figure, in the lateral direction) of the material to be ground C. ) - a plurality of nozzle terminals 10' in a row at equal intervals V
C mounting and fixed so that the direction of the valley nozzle terminal 10, that is, the straight line m connecting the two nozzles 16 is parallel to each other. Since a liquid film is formed by the collision of the liquid beam B on a plane perpendicular to the straight line mlc, it is desirable that the straight line m does not face upward in the width direction of the material to be ground C. This is because the plane of the liquid film that collides with the surface of the material to be ground C is parallel to the length and direction of the material to be ground, creating a non-grinded portion. When the mounting angle of the nozzle terminal 10 is determined as shown in Fig. 12, approximately oval-shaped grinding portions d are formed on the surface of the material to be ground C in a line in the width direction as shown in Fig. 13, and are individually oriented diagonally. can be formed. In this case, the liquid droplet on the desired material C of the nozzle terminal 10 alone.

As shown in Fig. 14, the distribution is made so that the flow rate is slightly lower at both ends than at the center, and the overlapping part of the grinding parts d becomes the same grinding part as the center part, thereby making the total grinding amount uniform. Try to measure it.

Note that the slurry S may be supplied all at once to one slurry supply means 18 by treating the collection of liquid films formed by each nozzle terminal 1o as one large liquid film.
Alternatively, the slurry S may be supplied to each liquid film individually. Therefore, according to this specific example, the material to be ground C
Since the grinding part d formed by a single nozzle terminal 10 can be connected in the width direction without overlapping, it is possible to grind a wide material. This is particularly effective when grinding uniformly.

Figures 15 and 16 C show other specific examples.
As shown in the figure, the nozzle terminals 1o are attached to the front surface of the chamber block 27 in multiple rows so that each grinding portion d formed on the material C to be ground is inclined with respect to the width direction. With this configuration and hole formation, it is possible to maintain a large distance between the ground parts d, so even if the directions of the nozzle terminals 10 are not aligned, the ground parts d do not directly touch each other, and therefore the nozzle terminals 10 can be adjusted individually. Uniform grinding can be further ensured.

In each of the above-described embodiments, the nozzle terminal 10 is attached to the front face VC of the chamber block 19, but the nozzle 12 between the nozzles 16 is directly connected to the block plate 20.
It is also possible to handle various materials to be ground CK by arranging not one but a plurality of chamber blocks 19.

In summary, according to the present invention, the following excellent effects can be achieved.

(1) According to this method, by changing the intersection angle of the liquid beam, a liquid film can be formed so that the collision force increases depending on the projection distance between the workpiece to be ground and the nozzle, and the formed liquid Since the film is continuous and stable and spreads out in a fan shape, the supplied slurry is reliably captured and diffused without spilling from the liquid film, so that the abrasive contained therein can effectively contribute to the grinding process, thereby improving the grinding process. Since the amount t'i3J can be increased and the transport speed of the material to be ground can be increased, multi-current grinding can be performed in a short time. In addition, since a liquid film is formed by the collision of the liquid beam, it has good directionality and allows for positive NVC grinding, and requires less abrasive material, slurry amount, and high-pressure liquid generation power (proportional to pressure x flow rate). It is possible to achieve high iris F cutting efficiency with a small amount.

(2) According to this device, since the nozzle terminal is detachable from the chamber, it can be easily replaced even if slurry clogging 9 occurs, and maintenance is extremely simple. Because the existing nozzle can be used as is, energy loss is lower than with a flat sedge nozzle, and the equipment is simpler. And by installing all the nozzle terminals in one row, the widthwise surface of the grinding part!
Since it is possible to increase it, it is extremely effective especially for grinding wide materials to be ground.

(3) Also, according to this device, by attaching the nozzle terminals to the chamber in multiple rows, the distance between the grinding parts on the workpiece formed by the adjacent nozzle terminals can be widened.
Since the overlapping range of the grinding portion can be optimized by individual direction adjustment of all nozzle terminals, more uniform grinding can be performed across the width direction.

[Brief explanation of the drawing]

1 and 2 are schematic explanatory diagrams showing a conventional liquid honing device, FIG. 3 is a schematic sectional view of a nozzle terminal, which is a main part of a liquid ejecting device according to the present invention, and FIG. 4 is a schematic sectional view of a nozzle tip. 5 is a basic configuration diagram of a liquid honing device according to the present invention; 61 is a schematic sectional view illustrating how a liquid beam injected from a nozzle terminal forms a liquid film;
Figures 7 to 9 are diagrams illustrating the principle of forming a liquid film by collision of two liquid beams, and are respectively a front view, a side view, and a plan view, and Figure 10 is the same as above. Figures 11 and 12 are diagrams of velocity characteristics with respect to the crossing angle θ of the liquid film. Figures 11 and 12 are plan views and square views showing a specific example of the liquid injection device. Figure 13 is a diagram showing the grinding that appears on the surface of the workpiece by the same specific example. A plan view of the material to be ground showing the situation, Fig. 14 is an explanatory diagram showing the heavy liquid volume distribution projected onto the material to be ground by a single nozzle terminal, and Fig. 15 is another specific example of the liquid injection device. Of course, the front view shown in FIG. 16 is a plan view of the material to be ground showing the same grinding situation as above. In the figure, 10 is a nozzle terminal, 16 is a nozzle, 1γ is a liquid injection device, 22 is a chamber, B is a liquid beam, C is a material to be ground, D is a liquid film, θ is an intersection angle, e is a collision point, and P is a pressurized liquid and S is a slurry. Patent applicant: Ishikawajima Ban M Arashi Kogyo Co., Ltd. Agent Patent attorney: Hakuo Kinutani Figure 3 7θ Figure 5 Figure 4 6 0 Figure 6 ↓ Figure 11

Claims (3)

[Claims] (1) V high-pressure liquid is injected as a liquid beam from two adjacent points in a direction that intersects with each other, and they collide on the upstream side leading to the material to be ground to form a liquid film that spreads in a fan shape, and at least Supply the entire slurry containing the abrasive to one side.
Liquid honing method with percentage characteristics. (2) The high-pressure liquid supplied to the chamber is injected as a liquid beam onto the front row of the chambers to which the high-pressure liquid is supplied, and the high-pressure liquid is sprayed in the form of a liquid beam on the upstream side to reach the material to be ground, so as to form a liquid film. A liquid ejecting device characterized in that each nozzle terminal having two nozzles facing in a cross direction is detachably attached. (3) In multiple rows in front of the chamber to which high-pressure liquid is supplied,
Each nozzle terminal has two nozzles facing each other in a cross direction so that the high-pressure liquid supplied to the chamber is injected as a liquid beam and collides with the material on the upstream side to form a liquid film on the material to be ground; A liquid injection device whose value is that it is configured to be detachably attached.