JPS62124900A - Method and device for cutting and peeling metal plate surface coating film - 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] <Industrial Application Field> So-called coating films such as linings or coatings of resin etc. are applied to the surfaces of metal plates of tanks, various containers, heat exchangers, etc. for the purpose of preventing corrosion and preventing product contamination. When a metal plate is constructed, it is often necessary to partially peel off the coating later in order to repair the metal plate or its coating, or to inspect the metal plate.

The present invention efficiently removes the coating film from other arbitrary parts (hereinafter referred to as the peeled part) without damaging the surface of the metal plate and the part of the coating film that should be left without being peeled off (hereinafter referred to as the non-peelable part). The present invention relates to a method and apparatus for partially peeling a coating film.

<Conventional technology> Conventionally, in the case of partial peeling of a coating film as described above, the coating film is cut with a grinder or the like along the boundary line between the peeled part and the non-peelable part of the coating film, and then the peeled part is cut. After heating with a burner or the like to melt the adhesive that adheres the coating film to the metal plate, the coating film is peeled off with a knife or the like, or the entire surface of the peeled part is scraped off with a grinder, sandblast, etc.

<Problems to be Solved by the Invention> However, when a grinder, sandblast, etc. are used, it is easy to damage not only the coating film but also the surface of the metal plate, and the generated dust extremely deteriorates the working environment. On the other hand, if the peeled part is heated with a burner, etc., not only will peeling easily occur in the non-peeled part due to overheating near the boundary with the non-peeled part, but there is also a risk of fire or explosion in oil tanks etc. This can easily lead to the generation of other gases. On the other hand, if heating is insufficient, the peeled portion will not be peeled off sufficiently. As described above, with these conventional methods, it is very difficult to manage the work, often leaving parts that are peeled off and requiring rework, which not only increases the construction period and construction cost, but is also undesirable from the standpoint of safety management. do not have.

In order to solve the above-mentioned problems of the conventional method and apparatus, the present invention utilizes the impact force of high-pressure fluid jet to spray any part of the coating film on the metal plate surface or the part of the coating film to be left (the part that is not peeled off). ) to provide a method and apparatus for safely and efficiently peeling off the material without damaging it.

Means for Solving the Problems] First, in the method of the present invention, high-pressure fluid is injected obliquely from above toward the cutting boundary line between the peeled portion and the non-peeled portion of the coating film on the surface of the metal plate. The direction of the high-pressure fluid jet is set so as to form an inclined cut surface in which the non-peeled portion is located below the peeled portion at the cut portion. Then, the high-pressure fluid jet is moved along the cutting boundary line to cut the boundary between the peeled portion and the non-peeled portion. After that, perform peeling work on the peeled part.

Further, in order to carry out the above method, the apparatus of the present invention includes a cutting device equipped with a cutting jet nozzle that injects at least one high-pressure fluid jet for cutting the coating film obliquely onto the coating film on the surface of the metal plate. A peeling device that peels off a portion of the cut coating film to be peeled off, and a support device that supports the cutting device and the peeling device so as to be freely conveyed.

According to the present invention, the coating film is moved along the cutting boundary line by moving the cutting high-pressure fluid along the boundary line or by making a circular motion so that the envelope line is along the cutting boundary line. It can be cut into a beveled shape.

As a result of this cutting operation, the boundary cut surface of the non-peeled portion becomes a slope such that the non-peeled portion becomes a layer below the peeled portion, and the thickness is gradually reduced to form a tapered surface that reaches the surface of the metal plate.

Therefore, the cut portion of the non-peeled portion is not damaged and there is no peeling from the metal plate surface. Furthermore, there is no damage to the metal plate surface when cutting the coating film.

In the cutting operation, when the high-pressure cutting fluid is moved along the cutting boundary line, it is effective to direct the high-pressure cutting fluid toward the cutting boundary line from the front to the rear obliquely with respect to the direction of progress of the cutting operation. It is.

In addition, when moving the high-pressure cutting fluid in a circular motion so that the envelope line follows the cutting boundary line, it is preferable to direct the high-pressure cutting fluid toward the internal force and maintain a predetermined angle with the metal plate surface. . According to this method, the peeling operation can be performed at the same time as the cutting operation.

During the stripping operation, damage to the metal plate surface can be prevented by repeatedly causing the jet of high-pressure stripping fluid to perform a peeling motion over a predetermined distance in a circular motion or in a direction perpendicular to the direction of progress of the stripping operation.

<Example> Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows an outline of the present invention, and a tank for storing petroleum products such as heavy oil has a coating film 2 such as a resin coating or a resin lining applied to the surface of a metal plate 1 such as an iron plate. , side panels).

By the way, in order to repair or inspect the metal plate 1, it becomes necessary to partially peel off the coating film 2.

In such a case, a cutting boundary line 3 is drawn on the surface of the part (separated part) 2A of the coating film 2 to be peeled off, or a guide is made, and the peeled part 2A is separated from the non-peeled part 2B by the method according to the present invention. Cut and peel off, leaving behind.

Here, the cut portion of the non-peelable portion 2B must not peel off from the surface of the metal plate 2 and must not unnecessarily damage the cutting boundary surface 4.

Therefore, for example, a self-propelled support device 5 is configured to run on the tank bottom plate, and at least one high-pressure fluid injection nozzle (hereinafter referred to as a cutting injection nozzle) 6 for cutting the coating film is provided on the support device 5. At least one coater I! High-pressure fluid injection nozzle for separation (hereinafter referred to as separation injection nozzle)
7, the coating film 2 is cut and peeled off while satisfying the above requirements. The cutting jet nozzle 6 directs a linear high-pressure fluid jet 8 toward the cutting boundary line 3 from above the non-separated portion 2B at a predetermined angle θ, for example, about 60 degrees or less, preferably about 30 degrees, with the surface of the metal plate 1. Sprays a jet of water at high speed,
The coating film 2 is cut along the cutting boundary line 3.

The cutting jet nozzle 6 is guided by the support device 5 to advance the high-pressure fluid jet 8 along the cutting boundary line 3, thereby forming the cutting boundary surface 4 of the non-peeling portion 2B, and
A part of the peeled portion 2A is peeled off from the surface of the metal plate 1. The cutting jet nozzle 6 is preferably inclined so that the high-pressure fluid jet 8 is jetted from the front to the rear in the direction in which the cutting operation proceeds.

The pressure of the high-pressure fluid jet 8 for cutting the coating film, for example, the high-pressure water jet, is at least 1, (100 kg/cm) at the nozzle source.
It is desirable that the value is n1 or more; for example, if the metal plate 1 is an iron plate and its surface is coated with FRP approximately 211 mm thick, the value is approximately 2,
(About 100 kg/cJ is desirable. However, the pressure of the high-pressure fluid jet 8 is generally selected depending on the strength and unevenness of the base material of the metal plate 1, and the strength and thickness of the coating film 20.

The cut boundary surface 4 of the non-peelable portion 2B thus cut is as follows:
The thickness gradually decreases to form a tapered inclined surface reaching the surface of the metal plate 1, forming a state in which the peeled portion 2A overlaps the upper layer of the non-peeled portion 2B. After the high-pressure cutting fluid jet hits the surface of the metal plate 1, it bounces back in the direction of the peeled part 2A, so its leading edge remains firmly on the surface of the metal plate 1 and does not peel off, while the peeled part 2 side is cut off. Some parts are largely peeled off by the high-pressure fluid jet. Cutting this coating film 2
The surface of the metal plate 1 is not damaged during the peeling process.

In the case of this embodiment, the exfoliating injection nozzle 7 has four injection holes 7a at its tip and is configured to freely rotate around the nozzle center axis, as shown in FIG. A high-pressure fluid jet (high-pressure water jet) 8 injected from the nozzle hole 7a is directed radially with respect to the nozzle central axis. Therefore, when the cutting jet nozzle 6 and the rotating peeling jet nozzle 7 move along the cutting boundary line 3 by the support device 5, as shown in FIG.
An inclined cutting boundary surface 4 is formed in the non-separated portion 2B,
The peeled portion 2A is peeled off from the surface of the metal plate 1 while being cut while the high-pressure fluid jet 8 draws a swirling pattern, so that no peeling remains. Further, the number of injection nozzles is sufficient to be the minimum necessary, and there is no need for a large amount of fluid.

The cutting and peeling of the coating film 2 on the surface of the tank side wall 1a and the corner surface of the bottom wall is also performed by first aligning the cutting spray nozzle 6 and the peeling spray nozzle 7 with respect to the metal plate surface, as shown in FIG. This can be done by setting up exactly the same way as explained in . This setting is achieved by simply moving the supporting parts of both injection nozzles 6°7 in parallel or 90°
It is done by rotating. However, in the corners, the cutting spray nozzles 6 are arranged on both sides of the coating film of the peeled part 2A in FIG. Just go. In FIG. 4, the solid line shows an example of cutting and peeling work of the coating film 2 on the tank side wall 1a, and the broken line shows an example of cutting and peeling work of the corner of the tank bottom wall.

It is clear that the cutting and peeling of the metal plate surface coating film on the tank side wall 1a or the like or on a spherical tank can be carried out in the same manner as in the case of a flat metal plate.

In addition to the above, the peeling work is performed by causing the high-pressure flow nozzle 6.7 for cutting or ff1lJ to perform a peeling motion that repeatedly reciprocates in a direction that intersects with the direction in which the cutting work progresses, for example, about 90 degrees. It's okay.

FIG. 5 shows a second embodiment of the invention. this.

The cutting spray nozzle is designed so that the coating film can be cut and peeled off at the same time.

That is, a pair of cutting injection nozzles IIA and IIB are arranged to face each other with a predetermined distance apart, and fluid passages 12A and 12B made of rigid pipes communicating with these cutting injection nozzles IIA and IIB are set as an axis. The pipe joint 13 is connected to a pipe joint 13 which is rotationally driven around the pipe. The fluid passages 12A and 12B merge within the pipe joint 13, and the pipe joint 13 is further connected to a fluid supply source. These pair of cutting injection nozzles IIA and IIB are arranged in a plane perpendicular to the metal plate 1 so as to be inclined at an equal angle θ with respect to the metal plate 1.

Therefore, according to this embodiment, as shown in FIG. 6 (5),
When the cutting injection nozzles IIA and IIB are rotated about the central axis of the pipe joint 13, these cutting injection nozzles II
A, IIB forms a cutting boundary surface, such as a circumferential surface of a cone, on the coating film 2 by means of a high-pressure fluid jet 8 ejected from this. Therefore, these rotating cutting injection nozzles IIA and IIB
When the whole is moved along the cutting boundary line 3 by a support device (not shown) and the envelope of the conical side-shaped cutting boundary surface thus formed is made to match the cutting boundary line 3, the sixth
As shown in the figure, a cutting boundary surface 4 made of an inclined surface cut along the cutting boundary line 3 can be obtained. As shown in FIG. 60, the circle formed when the high-pressure fluid jet 8 reaches the surface of the metal plate 1 also advances along the cutting boundary line 3, so that the trajectory painter 4 can be The metal surface is peeled off. If the peeled portion 2A is wide, the above operation may be repeated with parallel movement.

If the mutual spacing between the pair of cutting injection nozzles IIA and IIB can be adjusted, the coating film can be cut and peeled in one stroke in accordance with the width of the peeled portion 2. 7th
The figure shows an apparatus for this purpose, which is a modification of the embodiment shown in FIG.

That is, the fluid passages 12A and 12B in FIG.
and is connected to the injection nozzle 11A or IIB by a connector. Further, a nozzle position adjustment shaft 17 that intersects the rod 16 hanging from the pipe joint 13 in a perpendicular direction is fitted so as to be slidable in the axial direction of the rod 16, and both ends of the nozzle position adjustment shaft 17 and Injection nozzle IIA, I
The intersecting portion with IB is secured to each other by a clamp member 18. That is, as shown in FIGS. 8 and 9, the clamp member 18 holds the two clamping plates 21 and 22 together with the bolts.
The injection nozzle IIA is tightened by the nut device 23, and the injection nozzle IIA
, IIB and the nozzle position adjustment shaft 17 are held to fix their respective positional relationships, and the distance between the injection nozzles IIA and IIB is specified. This distance can be adjusted freely by loosening the bolt-nut device 23.

By rotationally driving the pair of injection nozzles IIA and IIB with this configuration, the :L11 separation of the two parallel cutting interfaces 4 and the coating film between them can be easily completed in one stroke.

Next, the details of the first embodiment, the schematic configuration of which is shown in FIG. 1, will be described.

As shown in FIG. 10, a metal plate surface coating film cutting/peeling device 30 according to the present invention is equipped with a support device 5 that can self-propel on the inner bottom wall of a tank 31 for heavy oil, etc. It is self-propelled by driving an air motor using air pressure supplied via an air hose 33 from a near compressor 32 provided outside. The air pressure also operates the rotary drive actuator 9 of the exfoliating injection nozzle 7.

High-pressure water for cutting and stripping the coating film is pressurized by a pressure unit 35 from a water tank 34 and supplied to the cutting and stripping device 30 via a water hose 36, while waste water in the tank 31 is supplied to a drainage pump. 37 leads to a wastewater treatment device 39 via a drainage hose 38, where the water is separated from the separated coating film and then discharged.

As shown in FIGS. 11 to 13, the support device 5 has an air motor 41 connected to an air hose 33. The support device 5 is driven to rotate, and the support device 5 is made to move by itself. The support device 5 is moved back and forth and stopped by operating a switching valve device 44 interposed in the air hose 33. 45 is a pressure regulating valve.

The cutting injection nozzle 6 and the peeling injection nozzle 7 are connected to the water hose 3 branched from the water hose 36 via a switching valve device 46.
5a and 36b are connected to inject or stop the injection of high aqua regia. Each of the exfoliating injection nozzles 7 has a rotary drive actuator 9 at its upper end, and is rotatable about its axis when air pressure supplied from the air hose 33a is introduced into the actuator 9.

The support device 5 is connected to the switching valve device 44 through frames 47 to 49 fixed to the main body 50. Pressure control valve 45. A switching valve device 46 and a support plate 52 are fixed, and a nozzle mounting plate 53 is fixed to the support plate 52 by a bolt donut device 55 so as to be freely attachable and detachable and to change its attachment position. Also, the support device 5
is equipped with a guide roller 51 on the side, and as shown in FIG. 12, the guide roller 51 guides the movement of the support device 5 along the inner wall of the tank 31.

Next, the mounting structure of the injection nozzle 6.7 will be explained based on FIGS. 14 to 18.

In FIG. 14, a support plate 52 fixedly attached to the frame 49 constitutes the front plate of the support device 5, and a nozzle mounting bracket 54 and a nozzle mounting plate 53 are jointly attached to the lower part of the support plate 52 by a bolt-nut device 55. It's tightened. Two brackets 56 protrude from the nozzle mounting bracket 54
a, 56b, a screw 57 is rotatably supported, and as the screw 57 rotates, a nozzle support block 58 screwed onto the screw 57 moves in the axial direction of the screw 57, that is, in the cutting/peeling operation progress direction of the support device 5. The position of the nozzle support block 58 is fixed by locking the rotation of the screw 57 with a lock nut 59.

The nozzle support arm 61 is rotatably supported by the end wall of the nozzle support block 58, and has a nozzle angle setting plate 62, as shown in FIG. 15, to set the nozzle support arm 61 at an appropriate angle. After setting, insert the bolt 63 into the arch-shaped long hole 62a formed in the nozzle angle setting plate 62.
When the nozzle support arm 61 is inserted and tightened to the nozzle support block 58, the nozzle support arm 61 is fixedly supported at a predetermined angle θ position. The cutting injection nozzle 6 is supported by the tip boss of the nozzle support arm 61 so as to be able to freely slide in the axial direction, and its axial position, that is, the distance from the coating film 2 of the metal plate 1 of the tank is specified by the lock bolt 64. . The cutting injection nozzle 6 is set obliquely from above to the rear with respect to the cutting operation progress direction of the support device 5 (FIG. 14D), and is inclined from the non-peeling portion 2B to the peeling portion 2A. .

Therefore, if the injection hole of the cutting injection nozzle 6 is aligned with the cutting boundary line 3, the high-pressure water jet 8 for cutting that is injected from this will not damage the cutting boundary surface 4 and will gradually reduce the thickness of the inclined surface. This means that it can be formed as follows. The inclination angle θ of the cutting injection nozzle 6 and the distance from the coating film 2 are selected as appropriate values depending on the type of the metal plate base material, the irregularities, and the material and thickness of the coating film 2.

The peeling injection nozzle 7 is attached to the nozzle mounting plate 53 by the first
It is installed as shown in Figures 6 and 17.

That is, at the upper part of the nozzle mounting plate 53, the bracket 7 is provided to protrude vertically in parallel. An extending screw 73 is rotatably supported, and rotation of the screw 73 is locked by tightening a lock nut 74. A nozzle holder 75 is screwed onto the screw 73 and moves up and down as the screw 73 rotates. The lock nut 76 locks the nozzle holder 75 to the screw 73. The nozzle holder 75 holds the rotational drive actuator 9 of the ff1l separation injection nozzle 7. With this configuration, the height of the nozzle holder 75 can be adjusted by rotating the screw 73, and the distance between the peeling injection nozzle 7 provided at the lower end of the rotary drive actuator 9 and the coating film 2 on the surface of the metal plate can be adjusted. Set to optimal value. Note that an air pressure control valve is installed in the air hose 33a that supplies air pressure to the rotary drive actuator 9, but it is not shown.

By setting the inclination angle and distance between the cutting spray nozzle 6 and the coating film as described above, and setting the distance between the peeling spray nozzle 7 and the coating film 2, as shown in FIG.
The coating film 2 on the surface of the metal plate 1 at the bottom of the tank having a predetermined width is peeled off. That is, the cutting jet nozzle 6 forms an inclined cutting boundary surface on the non-separated portion 2B and cuts the boundary of the peeled portion 2A, and the peeling jet nozzle 7 peels off the two peeled portions from the metal plate surface. That's what I do. Then, by allowing the support device 5 to travel by itself by a predetermined distance, the coating film can be removed from a desired area.

Here, by making the support device 5 self-propelled,
The worker does not need excessive effort even when working for a long time. In particular, by making the self-propelled mechanism driven by a fluid motor as in this example, the traveling speed can be easily and steplessly adjusted, and since no internal combustion engine or electric motor is used, it can be used even in flammable or explosive gas atmospheres. Furthermore, if the fluid used is the same as the high-pressure fluid for cutting and peeling, it is possible to consolidate the supply power source into one.

In addition, as a modification, the high pressure water injected from each injection nozzle 6.7 and the cut/peeled coating film layer can be taken out of the tank 31 by providing a waste collection device 80 as shown in FIG. can. That is, the waste collection device 80 is supported by a nozzle mounting plate 53, and a skirt 8 made of rubber or the like is attached to the lower edge of a splash cover 81 that surrounds each injection nozzle 6.7.
2 to prevent high-pressure water from splashing around.

Then, a drainage hose connected to the drainage pump 37 provided outside the tank 31 is inserted into the splash cover 81 from the lower gap to suck out water and the coating film layer, and the water is separated in the drainage treatment device 39. and then drain the water.

The coating film cutting and peeling work on the bottom wall corners of tank 31 was carried out in the 19th
Perform as shown in Fig. 20. That is, the bracket 54' that opposes and interferes with the side wall of the tank 31 is removed from the bolt donut device 55, leaving only the bracket 54 on the side far from the side wall on the nozzle mounting plate 53. In other words, this means that the cutting injection nozzle 6 on the side closer to the tank side wall 1a is removed from the support device 5, and as shown in FIG. The coating film 2 can now be peeled off. At this time, of course, the guide roller 51 may be removed, or the position of the guide roller 51 may be configured to be movable inward.

Cut the coating film on the surface of the side wall 1a of the tank 31, especially the lower corner.
Peeling is performed as shown in FIGS. 21 and 22. That is, bolt holes 85 and 86 are drilled in the lower part of the support plate 52 and the corresponding parts of the nozzle mounting plate 53, respectively.
Tilt it 90 degrees and match these bolt holes 85 and 86,
A bolt donut device 55 is attached here. Therefore, the nozzle mounting plate 53 is laid down at right angles to the support plate 52, and in this state, the lower nozzle mounting bracket is removed and the upper nozzle mounting plate 53 is left. the result,
As shown in FIG. 22, the peeling spray nozzle 7 from which the lower cutting spray nozzle 6 has been removed is made substantially horizontal and opposed to the side wall 1a at a substantially right angle. In this way, the coating film 2 on the side wall 1a
It is possible to cut and peel the bottom wall in the same way as for the bottom wall.

Incidentally, since the peeling injection nozzle 7 can be attached and detached, it goes without saying that the number of the injection nozzles 7 can be appropriately increased or decreased depending on the work.

<Effects of the Invention> As described above, the present invention provides the following effects.

That is, by cutting the boundary line for peeling the coating film using the impact force of a high-pressure fluid jet, a) the coating film can be completely cut and damage to the surface of the metal plate, which is the base material, can be prevented, and re-coating can be performed. No additional surface treatment is required.

b. Since no flame is used for heating, there is not only no risk of fire or explosion, but also no risk of generating toxic gas.

C. Since no grinder or sandblast is used, no dust is generated and the working environment is not degraded.

Since the same type of high-pressure fluid jet can be used for boundary line cutting and peeling of the coating film, simultaneous cutting and peeling operations can be efficiently performed with one device and one operator.

By spraying the high-pressure fluid for cutting the coating diagonally at a specific angle on the cutting boundary line of the peeled portion, there is no risk of damage such as peeling to the non-peeled portion.

b. The end face of the non-peeled part is finished smoothly with an inclination.

C0 Therefore, recoating of the peeled part can be done smoothly.

Furthermore, by directing the injection direction of the high-pressure fluid jet for cutting the coating obliquely backward with respect to the advancing direction of the peeling operation, the non-peeled portions can be more completely protected.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view for explaining the main parts of an embodiment of the present invention, FIG. 2 is a front end view of a peeling injection nozzle, and FIG. 3 is a cutting and FIG. 4 is a plan view showing the state of the peeled metal plate surface coating film, and shows how the coating film on the side walls and corner walls of the tank is cut and peeled using the embodiment device shown in FIG. 1 or a modification thereof. 5 is a front view showing an outline of the main parts of another embodiment of the present invention, and FIG. 6 is an explanatory diagram of cutting and peeling work according to the same embodiment. Part 7 explains the peeling work.
The figure is a front view showing a modification of the embodiment shown in FIG.
10 is an overall system diagram showing an arrangement example of the embodiment device shown in FIG. 1, FIG. 11 is a side view of the embodiment device shown in FIG. 1, and FIG. 12 is a plan view of the same as above. Figure 13 is a front view of the same as above, Figure 14 is an enlarged cross-sectional view taken along the line XIV-XTV in Figure 13, Figure 15 is a view taken along the line xv-xv in Figure 14, and Figure 16 is a peeling jet. Fig. 17 is a front view showing the nozzle support mechanism, Fig. 17 is a side view of the same as above, Fig. 18 is a schematic explanatory drawing showing the installation state of the spray tank, and Fig. 19 shows peeling of the coating near the corner of the bottom wall of the tank. A front view showing the attachment relationship of the support plate, nozzle mounting plate, and nozzle mounting bracket when carrying out the work;
A front view showing the operating state of the stripping device, FIG. 21 is a front view showing the attachment relationship of the support plate, nozzle mounting plate, and nozzle mounting bracket when performing coating film stripping work on the side wall of a tank, and FIG. 22 is a front view showing the same work as above. FIG. 14 is a front view showing the operating state of the cutting/peeling device shown in FIG. 13 for performing the cutting/peeling device.

Claims (19)

[Claims] (1) Along the cutting boundary line between the peeled part and the non-peeled part of the coating film on the surface of the metal plate, cut toward the cutting boundary line so that the non-peeled part of the cut part is below the peeled part. The cutting operation is performed by ejecting at least one high-pressure cutting fluid jet while moving obliquely from an upper position to form a substantially tapered cutting boundary surface in the non-separated portion, and then the peeling operation on the peeled portion is performed. A method for cutting and peeling a metal plate surface coating film. (2) The cutting operation is performed by moving a cutting high-pressure fluid jet on the cutting boundary line while maintaining a predetermined angle with the metal plate surface. How to cut and peel the coating. (3) The metal plate surface covering according to claim 2, characterized in that the high-pressure fluid jet for cutting is moved diagonally backward from an upper position with respect to the cutting work direction along the cutting boundary line. How to cut and peel the coating. (4) The metal according to any one of claims 1 to 3, wherein the peeling operation is performed by injecting at least one jet of high-pressure peeling fluid onto the peeled portion. How to cut and peel the plate surface coating. (5) The method for cutting and peeling a metal plate surface coating film according to claim 4, wherein the high-pressure fluid jet for cutting also serves as the high-pressure fluid jet for cutting. (6) The metal plate surface coating according to claim 4 or 5, wherein the peeling operation is performed by spraying a jet of high-pressure peeling fluid onto the peeled portion while drawing a circle. How to cut and peel the membrane. (7) The peeling operation is characterized in that a high-pressure peeling fluid jet is repeatedly moved for a predetermined distance in a direction that intersects with the advancing direction of the peeling operation.
A method for cutting and peeling a metal plate surface coating film according to item 1 or 5. (8) The cutting operation is performed by directing a high-pressure cutting fluid jet toward the inside of the circle and moving it in a circular motion while maintaining a predetermined angle with the metal plate surface along the cutting boundary line, based on the circular motion. 2. The method for cutting and peeling a metal plate surface coating film according to claim 1, wherein the envelope of the cutting boundary surface of the non-peeling portion is made to substantially match the cutting boundary line. (9) In the stripping operation, the high-pressure fluid jet for cutting also serves as the high-pressure fluid jet for stripping, and the high-pressure fluid jet for cutting is directed inward and in a circular motion while maintaining a predetermined angle with the metal plate surface. The method for cutting and peeling a metal plate surface coating film according to claim 1, wherein the cutting and peeling method comprises moving the metal plate surface coating film along the plate surface. (10) A cutting device equipped with a cutting jet nozzle that injects a jet of at least one high-pressure fluid for cutting the coating film obliquely onto the coating film on the surface of the metal plate, and peeling off the cut coating film. A device for cutting and peeling a metal plate surface coating film, comprising: a peeling device that peels off a portion to be coated; and a support device that supports the cutting device and the peeling device so as to be freely conveyed. (11) The cutting device is equipped with a positioning device for setting the distance and angle of the cutting injection nozzle with respect to the metal plate surface. Cutting and peeling equipment. (12) Claim 10 or 11, characterized in that the peeling device is equipped with a peeling injection nozzle that sprays at least one jet of high-pressure peeling fluid onto the peeled portion.
A cutting/peeling device for a metal plate surface coating film as described in 2. (13) The apparatus for cutting and peeling a metal plate surface coating film according to claim 12, wherein the peeling apparatus is a device that moves a peeling spray nozzle in a circular motion. (14) The stripping device is equipped with a device that swings a stripping spray nozzle in a direction intersecting the stripping operation direction. Peeling device. (15) The device for cutting and peeling a metal plate surface coating film according to any one of claims 10 to 14, wherein the support device includes a self-propelled device. (16) The cutting device is configured such that the cutting jet nozzle is offset from the rotation axis so that it can rotate freely by the drive device, and the jet direction is set at a predetermined angle toward the inner rotation of the metal plate surface. An apparatus for cutting and peeling a metal plate surface coating film according to claim 10. (17) The peeling device uses a spray nozzle for stripping, and the spray nozzle is offset from the rotation axis so that it can rotate freely by a drive device, and the spray direction is directed inward toward the metal plate surface at a predetermined angle. 11. The apparatus for cutting and peeling a metal plate surface coating film according to claim 10, wherein: (18) The device for cutting and peeling a metal plate surface coating film according to claim 16, wherein the peeling device also serves as a cutting device. (19) Claim 1, characterized in that the support device includes a suction device that covers the high-pressure fluid jet region of the cutting device and the peeling device and sucks out fluid from the surface of the metal plate.
The device for cutting and peeling a metal plate surface coating film according to item 2.