JP3044453B2 - Metal plate surface roughening method and roughening device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used, for example, as a base treatment for forming a sprayed film or a patina on a metal plate such as a copper plate or a copper alloy plate. The present invention relates to a metal plate surface roughening method and a roughening device capable of efficiently forming a rough surface having no directivity in a short time.

[0002]

2. Description of the Related Art For example, when an artificial patina is formed on a surface of a roofing material or the like, a method of forming a sprayed film of copper or a copper alloy on a metal plate having a roughened surface, and thereafter applying a patina coloring liquid is known. Have been. Also, in the case where various surface treatments such as rust prevention treatment are performed on the surface of the roofing material, a method of roughening the surface of the metal plate is used as a base treatment before that. By thus roughening the surface of the metal plate, that is, forming fine irregularities, the adhesiveness of a subsequently formed sprayed film is improved, and peeling is prevented. Conventionally, many proposals have been made on a method of roughening the surface of a metal plate performed for such a purpose.

The method of roughening the surface of a metal plate can be roughly classified as follows.
It is as follows. Abrasive abrasive particles are blasted by compressed air to impinge on the surface of the metal plate to form a roughened surface. There are a plastic working method of transferring to the surface and a method of grinding the surface of the metal plate with a wire brush or an elastic brush containing abrasive grains. In order to continuously process a long metal plate, it is necessary to roughen the surface while running the metal plate.In the above-described method, a blast zone of an appropriate length is provided in the middle of the traveling path, and What is necessary is just to let a metal plate pass through a blast zone. In the above method, the metal roll and the elastic brush in the above case may be rotatable cylinders (tubes), respectively, and may face the width direction of the running metal plate.

[0004]

However, the following problems are pointed out in the above roughening methods. In the above method, since the processing takes a relatively long time, it is necessary to reduce the traveling speed of the metal plate. In addition, a method of increasing the traveling speed of the metal plate by making the blast zone long is also conceivable, but it requires enormous costs for the equipment, and the abrasive grains blown by the compressed air damage the equipment and generate a remarkable noise. Therefore, the working environment was extremely bad. In addition, in the above-described method, since a load (press) is applied to transfer the unevenness of the metal roll surface to the metal plate surface, the metal roll is severely worn. Therefore, it was necessary to frequently change the rolls in order to obtain a certain roughened surface. Further, in the above-described method, since a grinding groove is formed in the running direction, a directionally roughened surface is formed, and it is difficult to obtain a sufficient anchoring effect of the sprayed film. In addition, since the method is a method of shaving the surface of a metal plate, the thickness of the metal plate tends to fluctuate due to a change in traveling speed.

Accordingly, an object of the present invention is to solve the above-mentioned problem and to propose a roughening method and a roughening device capable of efficiently forming a rough surface having no direction on a metal plate surface in a short time. Is to do.

[0006]

According to the present invention, an abrasive material is sprayed on the surface of a continuously running metal plate, and the abrasive material is interposed between a rotating roll covered with an elastic body and the surface of the metal plate. The present invention relates to a method for roughening a metal plate, wherein a part of the abrasive particles is transferred to the surface of a metal plate by forming a rough surface by rotating a rotary roll with abrasive particles interposed therebetween.

Further, the present invention provides a device for uniformly dispersing abrasive particles in the width direction on a surface of a continuously running metal plate, and a rotating roll covered with an elastic body. A roughening device for the metal plate surface rotatably facing in the width direction, a vacuum suction device and a collecting hopper for collecting used abrasive particles, and a particle size of the collected abrasive particles. Particle size sorter for sorting and reusing, abrasive storage tank for storing sorted and collected abrasives, dust collector for collecting reusable abrasives, abrasive for loss The present invention also proposes an apparatus for roughening the surface of a metal plate, comprising an abrasive grain supply facility for replenishing abrasive grains.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The rotating roll used in the present invention has a structure covered with an elastic body. The elastic body may be a brush-like or cylindrical molded body, and its material is also particularly limited. However, it is preferable that the material is excellent in wear resistance. For example, the brush-like elastic body may be made of artificial fiber obtained by molding polyethylene, polypropylene, polyamide (trade name: nylon), other synthetic resin, or the like into a fibrous form, natural fiber such as animal fiber, plant fiber, or metal fiber. They can be arranged in groups as appropriate.
For example, the brush tip can be set to have a diameter of 3 to 7 mmφ. However, depending on the density, it is possible to use a brush having a diameter exceeding the above range. Further, the cylindrical molded body can be formed by appropriately molding natural rubber, synthetic rubber, or the like, which has elasticity as a characteristic, or the synthetic resin as a foam molded body. The rotation speed of the rotating roll is not particularly limited, but is generally set at 400 to 1000 RPM. Further, the pressing conditions are not particularly limited, but are usually set to a rolling reduction of about 1 to 5 mm.

The abrasive particles used in the present invention include silicon carbide particles, alumina particles, and various sand particles. The abrasive particles are not particularly limited in particle size, but generally those having # 60 to # 150 can be used. Further, the spraying thickness is not particularly limited, but is usually set to about 0.5 to 5 mm.

In the present invention, a part of the abrasive material (metal plate) is interposed between the rotating roll covered with the elastic body and the surface of the metal plate, and the rotating roll is rotated. The shape of the portion that is in contact with the surface is transferred to the surface of the metal plate to form an uneven surface. The roughness of the uneven surface formed on the surface of the metal plate depends on the particle size of the abrasive particles used, the thickness of the scattered abrasive particles, the rotation speed of the rotating roll, the pressing conditions of the rotating roll, the metal plate Is appropriately set depending on conditions such as the traveling speed of the vehicle. Therefore, each condition is not particularly limited,
What is necessary is just to set suitably according to the desired roughness of the uneven surface according to a use. In addition, among the above-mentioned conditions, the particle size of the abrasive particles, the spray thickness of the abrasive particles, the rotation speed of the rotating roll, the pressing conditions of the rotating roll, already showed a general range, The traveling speed of the metal plate is set to 40 m / min or less.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the embodiment shown in FIG. 1, a long metal plate 1 runs continuously, and a roughening device faces in the middle of the running route. First, the equipment for spraying the abrasive material uniformly in the width direction of the metal plate 1 includes an abrasive storage tank 2 for storing the abrasive material, a spraying equipment 3, a vibrator 4, a thickness adjusting roll 5
And abrasive particles are continuously sprayed in the width direction by the vibrator 4 from the abrasive storage tank 2 through the spraying equipment 3,
Immediately after passing through the thickness adjusting roll 5, the deposited thickness of the abrasive particles is made constant in the width direction and the longitudinal direction. In addition, the spraying equipment 3 for the abrasive particles is not limited to the above-described configuration.
Any method such as a method by spraying or a natural fall using a gradient may be used.

The rotating roll 6 covered with the brush-like elastic body 61 is rotating at high speed, and the abrasive particles sprayed and deposited to a constant thickness as described above are beaten onto the surface of the metal plate 1. Then, the shape of the abrasive grains is transferred to the surface of the metal plate 1 to form an uneven surface. Immediately below the rotating roll 6, the abrasive layer is pressed (pressed) from above onto the deposited layer of abrasive particles to press the abrasive particles against the surface of the metal plate 1 to form an uneven surface. Further, immediately after the rotating roll 6, used abrasive particles are repelled. In particular, in the rotating roll 6, since the brush-like elastic body 61 strikes out and removes the abrasive grains eroded on the surface of the metal plate 1, it is possible to reduce the load on the reduced-pressure suction equipment 8 described later.

The used abrasive particles which have been repelled by the rotating roll 6 fall on the surface of the metal plate 1 by the baffle plate 7 and are brought close to the surface of the metal plate 1 to face them. At 8, it is transferred to the particle size sorter 10 by suction. Also,
The abrasive particles dropped from the traveling path are collected in a collection hopper 9 and are passed through a ball valve 11 to a particle size sorter 1.
Transferred to 0. The abrasive particles thus recovered are separated into abrasive particles that can be reused while maintaining the original particle size range by the particle size sorter 10 and abrasive particles that are crushed and cannot be reused, and that can be reused. Is transferred to the abrasive storage tank 2,
It is sprayed again on the surface of the metal plate 1. On the other hand, fine abrasive grains that cannot be reused are transferred from the particle size sorter 10 to the dust collector 12 and discarded.

When the amount of the abrasive grains in the abrasive grain storage tank 2 is reduced to the required minimum amount, the abrasive grain supply equipment 13 uses the compressed air of the compressor 14 to transfer the abrasive particles to the abrasive grain storage tank 2. , Can be replenished.

In the drawing, reference numeral 15 denotes a press roll,
6 is a back roll.

In the embodiment shown in FIG. 2, a rotary roll 6 'covered with an elastic body 62 which is a cylindrical molded body is provided instead of the rotary roll 6 covered with a brush-like elastic body 61. 1 is the same as that of the roughening device shown in FIG. In this embodiment, the rotating roll 6 ′ covered with the elastic body 62, which is a cylindrical molded body, is rotating, and the deposited layer of the abrasive particles is rubbed from above so that the abrasive particles are involved. By pressing (pressing), the abrasive particles are brought into pressure contact with the surface of the metal plate 1 to form an uneven surface.

Next, the results of experiments in which the surface of a metal plate is roughened using the roughening apparatus shown in FIG. 1 will be described. [Experimental Example 1] Experimental method: Phosphorus-deoxidized copper, 0.4 mm-thick cold-rolled sheet (JI
The surface of (SC 1200P- 表面 H) was treated under the following roughening conditions 1, and the surface roughness of the resulting roughened surface was measured in a direction parallel to and perpendicular to the running direction of the metal plate. (Surface roughness chart) is shown in FIG. For comparison, the same metal plate was treated under the conventional roughening conditions 2 and 3, and the surface roughness was measured in a direction parallel to and perpendicular to the running direction of the metal plate. The results (surface roughness chart) are also shown in FIG.

Roughening condition 1: An embodiment of the roughening method of the present invention. Rotating roll: brush roll made of polyethylene resin, diameter 420 mm Brush: tip diameter 6.4 mmφ, length about 50 mm Rotating speed of rotating roll: 600 RPM Rolling amount of rotating roll: 3.0 mm Traveling speed of metal plate: 20 m / Abrasive abrasive: Silicon carbide abrasive SiC # 120 Scattering thickness of abrasive: 3 mm

Roughening condition 2: A conventional roughening method using a wire brush was performed. Rotating roll: brush roll with stainless wire,
100 mm diameter brush: 0.5 mm diameter, about 40 mm length Number of rotations of rotating roll: 450 RPM Reduction amount of rotating roll: 3.0 mm Traveling speed of metal plate: 20 m / min

Roughening condition 3: A conventional blasting roughening method was performed. Abrasive grain discharge pressure: 4 kgf / cm ² Polishing material abrasive grains: Silicon carbide abrasive grains SiC # 120 Travel speed of metal plate: 1.0 m / min

Experimental Results: As is apparent from FIG. 3, under the roughening condition 1 in which the present invention was carried out, Rz was 1 in the direction parallel to the passing plate.
A surface roughness of 0.1 μm and 9.8 μm in the perpendicular direction was obtained. This surface was enlarged and observed with a microscope.
No directionality was observed. Under the roughening condition 2, which is a method of grinding with a wire brush, 2.5 μm in the parallel direction,
The surface roughness was 8.4 μm in the perpendicular direction, and a clear numerical difference was recognized. Also, stripes are observed under a microscope,
It was also visually confirmed that the directionality was clearly present.
Under the roughening condition 3 where the blast method was performed, the parallel direction was 8.4.
μm, surface roughness of 9.1 μm in a perpendicular direction, and almost no directionality was observed under a microscope. Thus, under the roughening condition 1 in which the present invention was implemented, the same surface roughness as that of the conventional blasting method (roughening condition 3) could be obtained. Moreover, in the blasting method (roughening condition 3), the running speed of the metal plate was set to be as low as 1/20 of that of the present invention (roughening condition 1), and the same surface roughness was obtained. A separate test confirmed that the roughness became extremely small when approaching the traveling speed of (roughening condition 1). That is, the present invention relates to the blast method 2
It was shown that it could be processed at as much as 0 times speed.

[Experimental Example 2: Peeling Test of Thermal Sprayed Film] Experimental method: A copper sprayed film having a thickness of about 30 μm was applied to each of the three roughened surfaces roughened in Experimental Example 1.
Then, in accordance with JIS H8504 "Tape test method", a cellophane tape is attached to the material surface, and strongly pressed with a finger for about 10 seconds. Then, the cellophane tape is made substantially perpendicular to the material surface (90 degrees). Peel) Pulled strongly and peeled off instantaneously, and observed the surface condition.

Experimental results: Under the roughening condition 1 in which the present invention was carried out, no peeling was observed. In the method of grinding with a wire brush (roughening condition 2), the sprayed film was almost completely peeled off. Under the roughening condition 3 in which the blast method was performed, no peeling was observed. Thus, it was confirmed that under the roughening condition 1 in which the present invention was carried out, a roughened surface having excellent anchoring property was obtained as in the conventional blasting method (roughening condition 3).

[0024]

As described above, the conventional blasting method requires a long processing time, and the roughening method using a wire brush or the like can provide only a directional roughened surface, which is insufficient for the sprayed film. There is a problem that a large anchoring effect cannot be obtained. However, in the roughening method and the roughening apparatus according to the present invention, a roughened surface having a large anchoring effect on the sprayed film and having extremely little directionality can be efficiently formed in a short time.
Therefore, the industrial productivity is good and it is economically excellent.

In particular, when a rotating roll covered with a brush-like elastic material is used, the brush part repels the used abrasive particles immediately after the rotating roll, thereby reducing the load on the vacuum suction equipment. Can be. In addition, the brush portion can also remove abrasive grains that have erected on the surface of the metal plate.

Further, the roughening apparatus of the present invention does not require special equipment or the like, and is highly practical.

[Brief description of the drawings]

FIG. 1 is a side view schematically showing one embodiment of a roughening device of the present invention.

FIG. 2 is a side view schematically showing another embodiment of the roughening device of the present invention.

FIG. 3 is a surface roughness chart of a roughened surface obtained by the present invention and a conventional method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Metal plate 2 Abrasive storage tank 3 Spraying equipment 4 Vibrator 5 Thickness adjusting roll 6, 6 'Rotating roll 61, 62 Elastic body 7 Baffle plate 8 Decompression suction equipment 9 Collection hopper 10 Particle size sorter 11 Ball valve 12 Dust collector 13 Abrasive grain supply equipment 14 Compressor 15 Holding roll 16 Back roll

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-7-75950 (JP, A) JP-A-59-169762 (JP, A) JP-A-2-24050 (JP, A) (58) Field (Int. Cl. ⁷ , DB name) B24B 29/00 C23C 4 / 02,8 / 02

Claims (5)

(57) [Claims] An abrasive material is sprayed on the surface of a continuously running metal plate, and the abrasive material is interposed between a rotating roll covered with an elastic body and the surface of the metal plate. By rotating the part, the shape of the abrasive particles is partially transferred to the surface of the metal plate.
A method for roughening the surface of a metal plate, comprising forming an uneven surface by copying. 2. An abrasive material is sprayed on a surface of a continuously running metal plate, and the abrasive material is interposed between a rotating roll covered with a brush-like elastic body and the surface of the metal plate. By rotating the rotating roll, the abrasive particles are beaten with a brush-like elastic body, and the shape of the abrasive particles is partially formed on the surface of the metal plate.
A method for roughening the surface of a metal plate, wherein the surface is transferred to form an uneven surface. 3. A device for spraying abrasive particles on the surface of a continuously running metal plate, and a rotating roll covered with an elastic body is rotatably exposed in the width direction of the surface of the metal plate. An apparatus for roughening a surface of a metal plate, comprising: 4. A device for spraying abrasive particles on the surface of a continuously running metal plate is provided, and a rotating roll covered with a brush-like elastic body can be rotated in the width direction of the metal plate surface. An apparatus for roughening a surface of a metal plate, characterized in that the surface is roughened. 5. A reduced-pressure suction device and a collecting hopper for collecting used abrasive particles, a particle size sorting machine for selecting and reusing the particle size of the collected abrasive particles, and a sorting and collecting operation. Equipped with an abrasive storage tank for storing used abrasives, a dust collector for collecting non-reusable abrasives, and an abrasive supply facility for replenishing abrasives for losses The metal plate surface roughening apparatus according to claim 3 or 4, wherein: