KR20230156421A - Method for manufacturing plated steel sheet with texture and apparatus for manufacturing plated steel sheet with texture - Google Patents

Abstract

A method for manufacturing a textured plated steel sheet capable of suppressing product defects based on insufficient film thickness of a plating layer and appearance defects, and a manufacturing apparatus for a textured plated steel sheet are provided. The method of manufacturing a plated steel sheet with a texture according to the present disclosure includes a plated layer forming process of manufacturing a plated steel sheet by forming a plated layer on the surface of the steel sheet by an electroplating method or a hot dip plating method, and grinding the surface of the plated layer of the plated steel sheet to form a plated layer on the surface of the plated steel sheet. A grinding process for forming a texture, first plating film thickness information regarding the film thickness of the plating layer of the plated steel sheet after the plating layer formation process and before the grinding process, and second plating film information regarding the film thickness of the plating layer of the plated steel sheet after the grinding process. A plating film thickness determination process for determining thickness information, and based on the first and second plating film thickness information, adjusting the plating amount of the plating layer formed in the plating layer forming process and the grinding amount of the surface of the plating layer ground in the grinding process. Have an adjustment process.

Description

Method for manufacturing plated steel sheet with texture and apparatus for manufacturing plated steel sheet with texture

The present disclosure relates to a method for manufacturing a plated steel sheet with a texture and an apparatus for manufacturing a plated steel sheet with a texture.

Items such as electrical equipment, building materials, and automobiles sometimes require corrosion resistance and design properties. As a material suitable for this application, textured plated steel sheets are being examined. A plated steel sheet with a texture has a plating layer on the surface of which a texture represented by a hairline is formed.

A method for manufacturing a textured plated steel sheet is proposed, for example, in Japanese Patent Application Laid-Open No. 2006-124824 (Patent Document 1) and International Publication No. 2008/054419 (Patent Document 2).

In Patent Document 1, a galvanized layer is formed on the surface of a steel sheet, and a hairline is formed on the surface of the galvanized layer by grinding the surface of the galvanized layer using a belt sander (abrasive belt) of about #60 to #320. .

Patent Document 2 proposes a method of polishing metal alloy-plated steel sheet products. The polishing method disclosed in Patent Document 2 is a polishing method of a metal alloy plated steel sheet product to form a polished plated surface having a stainless steel-like appearance with continuous consistency, and includes: a) a metal with a minimized sequin plating film; steps for supplying an alloy plated steel sheet product, and b) forming an intermediate metal alloy plated steel sheet product having a relief plating film in a textured pattern that when polished imparts an appearance like said continuous consistent stainless steel. and c) a step of embossing the miniaturized sequin plating film, and c) a step of polishing the relief plating film of the textured pattern to form the continuous, consistent stainless steel-like appearance.

Japanese Patent Publication No. 2006-124824 International Publication No. 2008/054419

However, when manufacturing a plated steel sheet with a texture by grinding the surface of the plating layer, there are cases where the film thickness of the plating layer is insufficient or the texture is not sufficiently formed, resulting in poor appearance, resulting in product defects. It is desirable to be able to quickly identify the cause of product defects. Product defects can be suppressed by quickly identifying the cause of product defects and ruling out the causes of product defects.

However, in the method for manufacturing a plated steel sheet with a texture disclosed in Patent Documents 1 and 2 described above, product defects are not examined. Therefore, when manufacturing a textured plated steel sheet using the method disclosed in Patent Documents 1 and 2 mentioned above, there are cases where product defects cannot be suppressed.

The purpose of the present disclosure is to provide a method for manufacturing a plated steel sheet with a texture that can suppress product defects based on insufficient film thickness of the plating layer and poor appearance, and to identify the causes of product defects based on insufficient film thickness of the plating layer and defective appearance. The object is to provide a manufacturing device for a plated steel sheet with an easy-to-process texture.

The method for manufacturing a plated steel sheet with a texture according to the present disclosure,

A plating layer forming process of manufacturing a plated steel sheet by forming a plating layer on the surface of the steel sheet by electroplating or hot dip plating,

A grinding process of grinding the surface of the plating layer of the plated steel sheet to form a texture on the surface of the plating layer;

First plating film thickness information regarding the film thickness of the plating layer of the plated steel sheet after the plating layer forming process and before the grinding process, and second plating film thickness information regarding the film thickness of the plating layer of the plated steel sheet after the grinding process. A plating film thickness determination process that determines,

An adjustment step is provided to adjust, based on the first and second plating film thickness information, the plating amount of the plating layer formed in the plating layer forming step and the grinding amount of the surface of the plating layer ground in the grinding step.

The apparatus for manufacturing a plated steel sheet with a texture according to the present disclosure,

A plating device for producing a plated steel sheet by performing hot dip plating or electroplating to form a plating layer on the surface of the steel sheet;

a grinding device disposed downstream of the plating device and grinding the surface of the plating layer of the plated steel sheet to form a texture on the surface of the plating layer;

a first plating film thickness determination device that determines first plating film thickness information regarding the film thickness of the plating layer before the grinding, and outputs the first plating film thickness information;

A second plating film thickness determination device is disposed downstream of the grinding device and determines second plating film thickness information regarding the film thickness of the ground plating layer, and outputs the second plating film thickness information.

The method for manufacturing a plated steel sheet with a texture according to the present disclosure can suppress product defects based on insufficient film thickness of the plating layer and poor appearance. The apparatus for manufacturing a plated steel sheet with a texture according to the present disclosure is easy to specify the cause of product defects based on insufficient film thickness of the plating layer and poor appearance.

1 is an overall view of a manufacturing apparatus for a plated steel sheet with a texture in the first embodiment.
Figure 2 is a cross-sectional view showing the schematic configuration of an example of an electrogalvanizing device.
Figure 3 is a side view showing the schematic configuration of an example of a hot-dip galvanizing apparatus.
Figure 4 is a cross-sectional view showing a schematic configuration of an example of a grinding device.
FIG. 5 is an overall view of the apparatus for manufacturing a plated steel sheet with a texture when equipped with a control device in the second embodiment.
Figure 6 is a functional block diagram of the control device.
Figure 7 is a functional block diagram showing an example of the hardware configuration of the control device.
Figure 8 is an operation flow chart of the apparatus for manufacturing a textured plated steel sheet including a control device.
FIG. 9 is an operation flowchart of the apparatus for manufacturing a plated steel sheet with a texture equipped with a control device when the second plating film thickness information exceeds the reference range.
FIG. 10 is an operation flowchart of the apparatus for manufacturing a plated steel sheet with a texture equipped with a control device when the second plating film thickness information is less than the reference range.
FIG. 11 is an operation flowchart of the apparatus for manufacturing a plated steel sheet with a texture equipped with a control device when the second plating film thickness information is within the reference range.

A method of manufacturing a plated steel sheet with a texture includes, for example, a plating layer formation process and a grinding process after the plating layer formation process. In the plating layer formation process, a plating layer is formed on the surface of the steel sheet to manufacture a plated steel sheet. The grinding process is performed after the plating layer formation process. In the grinding process, for example, the surface of the plating layer of a plated steel sheet is ground to form a texture on the surface of the plating layer.

Here, the texture is a shape formed by the surface irregularities of the plating layer. Textures include, for example, hairlines and vibrations. The hairline is shaped like a number of fine linear grooves. Vibration has a shape formed by a large number of fine arc-shaped grooves.

The plating layer of the textured plated steel sheet is formed on the surface of the steel sheet and then ground. That is, a plating layer having the final film thickness after being formed and ground is disposed on the plated steel sheet with a texture.

The plating layer of the textured plated steel sheet increases the corrosion resistance of the textured plated steel sheet. If the final film thickness of the plating layer is less than a certain value, that is, if the final film thickness is insufficient, the corrosion resistance of the textured plated steel sheet decreases. Therefore, if the final film thickness of the plating layer is less than a certain value, the product becomes defective.

Meanwhile, in the grinding process, if the plating layer is sufficiently ground, the texture is sufficiently formed. In this case, the designability of the textured plated steel sheet increases. The present inventors believed that if the plating layer was sufficiently ground, the final film thickness of the plating layer would be below a certain value.

The present inventors believed that the final film thickness of the plating layer could be used as an indicator of the corrosion resistance and designability of the textured plated steel sheet. The present inventors established a standard range for the final film thickness of the plating layer, and believed that if the final film thickness of the plating layer is within the standard range, the textured plated steel sheet can be judged to have excellent corrosion resistance and designability.

Accordingly, the present inventors set a reference range for the final film thickness of the plating layer of the textured plated steel sheet. The present inventors believed that by adjusting the operating conditions based on the final film thickness of the plating layer, product defects based on insufficient final film thickness of the plating layer and poor appearance could be suppressed.

However, there are cases where product defects based on insufficient final film thickness of the plated layer and appearance defects in textured plated steel sheets cannot be suppressed simply by adjusting the operating conditions based on the final film thickness of the plating layer. The present inventors investigated this cause. As a result, the following knowledge was obtained.

For example, assume a case where the final film thickness of the plating layer is insufficient. Even if the plating amount of the plating layer formed in the plating layer formation process is increased in order to increase the final film thickness of the plating layer, the final film thickness of the plating layer may be less than the standard range. This is a case where the grinding amount of the plating layer to be ground in the grinding process is too large. On the other hand, if the amount of grinding of the plating layer in the grinding process is reduced in order to increase the final film thickness of the plating layer, the texture may not be sufficiently formed, resulting in poor appearance. This is a case where the plating amount of the plating layer formed in the plating layer formation process is too small. In this case, it is necessary to increase the grinding amount of the plating layer ground in the grinding process and simultaneously increase the plating amount of the plating layer formed in the plating layer forming process.

For example, assume a case where the texture is not sufficiently formed and appearance defects occur. In order to sufficiently form a texture, if the grinding amount of the plating layer to be ground in the grinding process is increased, the final film thickness of the plating layer may fall below the standard range. This is a case where the plating amount of the plating layer formed in the plating layer formation process is too small. In this case, it is necessary to increase the grinding amount of the plating layer ground in the grinding process and simultaneously increase the plating amount of the plating layer formed in the plating layer forming process.

From the above examination, it was found that the final film thickness of the plating layer cannot be used as an indicator of the corrosion resistance and designability of the textured plated steel sheet. From the above-described examination, it can be seen that two factors affect the final film thickness and appearance of the plating layer: (1) the plating amount of the plating layer formed in the plating layer formation process, and (2) the grinding amount of the plating layer ground in the grinding process. I was able to. The present inventors have found that by simply measuring the final film thickness of the plating layer, product defects based on insufficient final film thickness of the plating layer and/or appearance defects occur due to either (1) and/or (2). I found out that I couldn't be specific.

Accordingly, the present inventors examined methods for solving this problem. Here, information regarding the film thickness of the plating layer of the plated steel sheet after the plating layer formation process and before the grinding process is referred to as first plating film thickness information. Information regarding the film thickness of the plating layer of the plated steel sheet after the grinding process is referred to as second plating film thickness information. The present inventors have found that by obtaining information on both the second plating film thickness information regarding the plating film thickness after grinding as well as the first plating film thickness information regarding the plating film thickness before grinding, the final film thickness of the plating layer is insufficient, and/ Alternatively, it was thought that the cause of product defects based on appearance defects could be quickly identified. And, by adjusting the operating conditions based on both the first and second plating film thickness information, it is possible to suppress the corrosion resistance of the textured plated steel sheet due to insufficient final film thickness of the plating layer and product defects based on appearance defects. I thought there was.

The present inventors also studied a manufacturing apparatus that can easily identify the causes of product defects in textured plated steel sheets based on insufficient final film thickness of the plating layer and appearance defects. The manufacturing apparatus of the textured plated steel sheet used in the method of manufacturing the textured plated steel sheet described above includes, for example, a plating device and a grinding device. The plating device produces a plated steel sheet by forming a plating layer on the surface of the steel sheet. The grinding device is disposed downstream of the plating device and grinds the surface of the plating layer of the plated steel sheet to form a texture on the surface of the plating layer. The present inventors thought that the manufacturing apparatus of this textured plated steel sheet should also be provided with a first plating film thickness determination device and a second plating film thickness determination device. The first plating film thickness determination device determines first plating film thickness information regarding the film thickness of the plating layer before grinding, and outputs the first plating film thickness information. The second plating film thickness determination device is disposed downstream of the grinding device, determines second plating film thickness information regarding the film thickness of the ground plating layer, and outputs the second plating film thickness information. In the apparatus for manufacturing a textured plated steel sheet having the above configuration, which of the following causes product defects: (1) the plating amount of the plating layer formed in the plating layer formation process, and/or (2) the grinding amount of the plating layer ground in the grinding process. I think it's easy to specify.

The method for manufacturing a plated steel sheet with a texture of this embodiment completed based on the above knowledge has the following structure.

[One]

A plating layer forming process of manufacturing a plated steel sheet by forming a plating layer on the surface of the steel sheet by electroplating or hot dip plating,

A grinding process of grinding the surface of the plating layer of the plated steel sheet to form a texture on the surface of the plating layer;

First plating film thickness information regarding the film thickness of the plating layer of the plated steel sheet after the plating layer forming process and before the grinding process, and second plating film thickness information regarding the film thickness of the plating layer of the plated steel sheet after the grinding process. A plating film thickness determination process that determines,

Based on the first and second plating film thickness information, an adjustment step of adjusting the plating amount of the plating layer formed in the plating layer forming process and the grinding amount of the surface of the plating layer ground in the grinding process,

Method for manufacturing plated steel sheet with texture.

[2]

A method of manufacturing a plated steel sheet with a texture described in [1],

In the above adjustment process,

Based on the first plating film thickness information and the second plating film thickness information, grinding amount information, which is information regarding the grinding amount in the grinding process, is obtained,

Based on the second plating film thickness information and the grinding amount information, adjusting the plating amount of the plating layer formed in the plating layer forming process and the grinding amount of the surface of the plating layer ground in the grinding process.

Method for manufacturing plated steel sheet with texture.

[3]

A method of manufacturing a plated steel sheet with a texture described in [2],

In the above adjustment process,

When the second plating film thickness information exceeds the standard range and the grinding amount information exceeds the standard range, the plating amount of the plating layer formed in the plating layer forming process is reduced, and the plating layer ground in the grinding process is reduced. Adjusted to reduce the amount of grinding of the surface,

When the second plating film thickness information exceeds the reference range and the grinding amount information is less than the reference range, the plating amount of the plating layer formed in the plating layer forming process is maintained, and the plating amount of the plating layer ground in the grinding process is maintained. Adjust to increase the amount of grinding of the surface,

When the second plating film thickness information exceeds the standard range and the grinding amount information is within the standard range, the plating amount of the plating layer formed in the plating layer forming process is reduced, and the plating amount of the plating layer ground in the grinding process is reduced. adjust to maintain the grinding amount of the surface,

When the second plating film thickness information is less than the standard range and the grinding amount information is more than the standard range, the plating amount of the plating layer formed in the plating layer forming process is maintained, and the plating layer is ground in the grinding process. Adjusted to reduce the amount of grinding of the surface,

When the second plating film thickness information is less than the reference range and the grinding amount information is less than the reference range, the plating amount of the plating layer formed in the plating layer forming process is increased, and the plating amount of the plating layer ground in the grinding process is increased. Adjust to increase the amount of grinding of the surface,

When the second plating film thickness information is less than the standard range and the grinding amount information is within the standard range, the plating amount of the plating layer formed in the plating layer forming process is increased, and the plating amount of the plating layer ground in the grinding process is increased. adjust to maintain the grinding amount of the surface,

When the second plating film thickness information is within the standard range and the grinding amount information is greater than the standard range, the plating amount of the plating layer formed in the plating layer forming process is maintained, and the plating layer is ground in the grinding process. Adjusted to reduce the amount of grinding of the surface,

When the second plating film thickness information is within the reference range and the grinding amount information is less than the reference range, the plating amount of the plating layer formed in the plating layer forming process is maintained, and the plating amount of the plating layer ground in the grinding process is maintained. Adjust to increase the amount of grinding of the surface,

When the second plating film thickness information is within the standard range and the grinding amount information is within the standard range, the plating amount of the plating layer formed in the plating layer forming process and the surface of the plating layer ground in the grinding process Adjusting to maintain the grinding amount,

Method for manufacturing plated steel sheet with texture.

[4]

A method for manufacturing a plated steel sheet with a texture according to any one of [1] to [3],

In the plating film thickness determination process,

Measuring the film thickness of the plating layer of the plated steel sheet after the plating layer forming process and before the grinding process, and using the measured film thickness as the first plating film thickness information,

Method for manufacturing plated steel sheet with texture.

[5]

A method for manufacturing a plated steel sheet with a texture according to any one of [1] to [4],

In the plating film thickness determination process,

Measuring the film thickness of the plating layer of the plated steel sheet after the grinding process, and using the measured film thickness as the second plating film thickness information,

Method for manufacturing plated steel sheet with texture.

[6]

A method for manufacturing a plated steel sheet with a texture according to any one of [1] to [5],

In the plating layer forming step, the plating layer is formed by the electroplating method,

In the plating film thickness determination process,

In the plating layer formation process, the first plating is based on the metal ion concentration in the plating solution, the sheet-through speed of the steel sheet in the plating solution, the width direction length of the steel sheet, current density, current efficiency, and/or the temperature of the plating solution. Determining film thickness information,

Method for manufacturing plated steel sheet with texture.

[7]

A method for manufacturing a plated steel sheet with a texture according to any one of [1] to [5],

In the plating layer forming step, the plating layer is formed by the hot dip plating method,

In the plating film thickness determination process,

In the plating layer forming process, determining the first plating film thickness information based on the sheet-threading speed of the steel sheet in the plating bath, the collision pressure of the wiping gas, and/or the reduction rate in the skin pass mill,

Method for manufacturing plated steel sheet with texture.

[8]

A method for manufacturing a plated steel sheet with a texture according to any one of [1] to [7],

Further comprising a coating film forming process of forming a coating film on the surface of the plated steel sheet after the grinding process,

Method for manufacturing plated steel sheet with texture.

[9]

A method for manufacturing a plated steel sheet with a texture according to any one of [1] to [8],

Further comprising an appearance evaluation process of evaluating the appearance of the plated steel sheet after the grinding process by the glossiness of the surface of the plated steel sheet after the grinding process.

Method for manufacturing plated steel sheet with texture.

[10]

A method of manufacturing a plated steel sheet with a texture described in [9],

In the appearance evaluation process,

Based on the two glossiness levels: the glossiness of the surface of the plated steel sheet measured toward the longitudinal direction of the plated steel sheet, and the glossiness of the surface of the plated steel sheet measured toward the width direction of the plated steel sheet. To evaluate the appearance of plated steel sheets,

Method for manufacturing plated steel sheet with texture.

[11]

A method for manufacturing a plated steel sheet with a texture described in [9] or [10],

In the above adjustment process,

Based on the first plating film thickness information, the second plating film thickness information, and the glossiness of the surface of the plated steel sheet after the grinding process, the plating amount of the plating layer formed in the plating layer forming step, and the grinding Adjusting the grinding amount of the surface of the plating layer to be ground in the process,

Method for manufacturing plated steel sheet with texture.

[12]

A plating device for producing a plated steel sheet by performing hot dip plating or electroplating to form a plating layer on the surface of the steel sheet;

a grinding device disposed downstream of the plating device and grinding the surface of the plating layer of the plated steel sheet to form a texture on the surface of the plating layer;

a first plating film thickness determination device that determines first plating film thickness information regarding the film thickness of the plating layer before the grinding, and outputs the first plating film thickness information;

A second plating film thickness determination device disposed downstream of the grinding device, determines second plating film thickness information regarding the film thickness of the ground plating layer, and outputs the second plating film thickness information.

Equipment for manufacturing plated steel sheets with texture.

[13]

A manufacturing device for a plated steel sheet with a texture described in [12],

Further comprising a control device for controlling the plating device and the grinding device,

The control device is,

Based on the first plating film thickness information and the second plating film thickness information, the plating device is controlled to adjust the plating amount of the plating layer formed on the surface of the steel sheet by the plating device, and further the first plating Controlling the grinding device to adjust the grinding amount of the surface of the plating layer to be ground by the grinding device based on the film thickness information and the second plating film thickness information.

Equipment for manufacturing plated steel sheets with texture.

[14]

A manufacturing device for a plated steel sheet with a texture described in [13],

The control device is,

Based on the first plating film thickness information and the second plating film thickness information, grinding amount information, which is information regarding the grinding amount by the grinding device, is obtained,

Based on the second plating film thickness information and the grinding amount information, the plating device is controlled to adjust the plating amount of the plating layer formed on the surface of the steel sheet by the plating device, and further the second plating film thickness Based on the information and the grinding amount information, controlling the grinding device to adjust the grinding amount of the surface of the plating layer to be ground by the grinding device,

Equipment for manufacturing plated steel sheets with texture.

[15]

A manufacturing device for a plated steel sheet with a texture described in [14],

The control device is,

When the second plating film thickness information exceeds the standard range and the grinding amount information exceeds the standard range, the plating device is controlled to reduce the plating amount of the plating layer formed by the plating device, and the grinding Controlling the grinding device to reduce the amount of grinding of the surface of the plating layer being ground by the device,

When the second plating film thickness information exceeds the standard range and the grinding amount information is less than the standard range, the plating device is controlled to maintain the plating amount of the plating layer formed by the plating device, and further, the grinding device Controlling the grinding device to increase the grinding amount of the surface of the plating layer being ground,

When the second plating film thickness information exceeds the standard range and the grinding amount information is within the standard range, the plating device is controlled to reduce the plating amount of the plating layer formed by the plating device, and the grinding device Controlling the grinding device to maintain the grinding amount of the surface of the plating layer to be grinded,

When the second plating film thickness information is less than the standard range and the grinding amount information is more than the standard range, the plating device is controlled to maintain the plating amount of the plating layer formed by the plating device, and the grinding device Controlling the grinding device to reduce the grinding amount of the surface of the plating layer to be ground,

When the second plating film thickness information is less than the standard range and the grinding amount information is less than the standard range, the plating device is controlled to increase the plating amount of the plating layer formed by the plating device, and the grinding device Controlling the grinding device to increase the amount of grinding of the surface of the plating layer to be ground,

When the second plating film thickness information is less than the standard range and the grinding amount information is within the standard range, the plating device is controlled to increase the plating amount of the plating layer formed by the plating device, and the grinding device Controlling the grinding device to maintain the grinding amount of the surface of the plating layer being grinded,

When the second plating film thickness information is within the standard range and the grinding amount information is beyond the standard range, the plating device is controlled to maintain the plating amount of the plating layer formed by the plating device, and the grinding device Controlling the grinding device to reduce the amount of grinding of the surface of the plating layer to be ground,

When the second plating film thickness information is within the standard range and the grinding amount information is less than the standard range, the plating device is controlled to maintain the plating amount of the plating layer formed by the plating device, and further, the grinding device Controlling the grinding device to increase the grinding amount of the surface of the plating layer to be ground,

When the second plating film thickness information is within the standard range and the grinding amount information is within the standard range, the plating device is controlled to maintain the plating amount of the plating layer formed by the plating device, and further, the grinding device Controlling the grinding device to maintain the grinding amount of the surface of the plating layer being ground,

Equipment for manufacturing plated steel sheets with texture.

[16]

An apparatus for manufacturing a plated steel sheet with a texture according to any one of [12] to [15],

Further comprising a coating film forming device disposed downstream of the grinding device and forming a coating film on the surface of the ground plating layer,

Equipment for manufacturing plated steel sheets with texture.

[17]

An apparatus for manufacturing a plated steel sheet with a texture according to any one of [12] to [16],

Further comprising one or a plurality of gloss meters disposed downstream of the grinding device and measuring the glossiness of the surface of the plated steel sheet having the ground plating layer,

Equipment for manufacturing plated steel sheets with texture.

[18]

A manufacturing device for a plated steel sheet with a texture described in [17],

The gloss meter is,

a gloss meter that measures the gloss of the surface of the plated steel sheet in the longitudinal direction of the plated steel sheet, and a gloss meter that measures the gloss of the surface of the plated steel sheet in the width direction of the plated steel sheet. Glossy artist,

Equipment for manufacturing plated steel sheets with texture.

[19]

An apparatus for manufacturing a plated steel sheet with a texture according to [17] or [18],

The control device is,

Based on the first plating film thickness information, the second plating film thickness information, and the glossiness of the surface of the plated steel sheet, to adjust the plating amount of the plating layer formed on the surface of the steel sheet by the plating device. Controlling the plating device, and grinding the surface of the plating layer with the grinding device based on the first plating film thickness information, the second plating film thickness information, and the glossiness of the surface of the plated steel sheet. Controlling the grinding device to adjust the grinding amount,

Equipment for manufacturing plated steel sheets with texture.

Hereinafter, a method for manufacturing a plated steel sheet with a texture and a manufacturing apparatus for a plated steel sheet with a texture according to the present embodiment will be described. The same or significant portions of the drawings are assigned the same reference numerals and their descriptions are not repeated.

[First Embodiment]

[About manufacturing equipment for plated steel sheets with texture]

1 is an overall view of a manufacturing apparatus for a plated steel sheet with a texture in the first embodiment. Referring to FIG. 1, the apparatus 1 for manufacturing a plated steel sheet with a texture includes a plating apparatus 2, a grinding apparatus 3, a first plating film thickness determination device 4, and a second plating film thickness determination. Equipped with device (5). The manufacturing apparatus 1 for a plated steel sheet with a texture of this embodiment is a continuous line type manufacturing apparatus. The plating device 2 and the grinding device 3 are arranged on the same continuous line. The grinding device 3 is disposed downstream of the plating device 2. The straight line in FIG. 1 is a straight line indicating a manufacturing line. The manufacturing apparatus 1 of a plated steel sheet with a texture of this embodiment is equipped with an uncoiling apparatus and a winding apparatus, not shown. The uncoil device is disposed upstream of the plating device 2 and rewinds the prepared steel sheet coil. The winding device is disposed downstream of the grinding device 3 and winds the manufactured textured plated steel sheet into a coil. Since the manufacturing apparatus 1 of the textured plated steel sheet is of the continuous line type, a winding device and an uncoiling device are not disposed between the plating device 2 and the grinding device 3.

[About plating equipment]

The plating device 2 performs hot dip plating or electroplating to form a plating layer on the surface of the steel sheet to manufacture a plated steel sheet. Hot dip plating is, for example, selected from the group consisting of hot dip galvanizing and hot dip aluminum plating. The electroplating is selected from the group consisting of, for example, electrozinc plating, electrocopper plating and electronickel plating. The plating device 2 is not particularly limited as long as it is a plating device 2 that performs hot dip plating or electroplating. Preferably, the plating device 2 is a hot-dip galvanizing device that performs hot-dip galvanizing, or an electric zinc plating device that performs electric zinc plating. Hereinafter, as an example, a case of using an electric galvanizing device and a case of using a hot-dip galvanizing device will be described.

[Electrical galvanizing equipment]

FIG. 2 is a cross-sectional view showing a schematic configuration of an example of an electrogalvanizing apparatus 200. Referring to FIG. 2, the electrogalvanizing apparatus 200 includes a plurality of conductor rolls 201, a plurality of anodes 202, and a plurality of plating tanks 203. The conveyance direction of the steel sheet 6 conveyed into the electrogalvanizing device 200 is changed downward by the conductor roll 201. The steel sheet 6 passes near the anode 202 and is continuously conveyed into the plating tank 203. Zinc plating liquid is stored in the plating tank 203. The anode 202 is immersed in a zinc plating solution. The steel sheet 6 conveyed into the plating tank 203 is continuously immersed in the zinc plating solution. In the zinc plating solution, a current flows from the anode 202 to the steel sheet 6 using the steel sheet 6 as a cathode, thereby forming a zinc plating layer on the surface of the steel sheet 6. The conveyance direction of the steel sheet 6 changes from downward to upward by the conductor roll 201 in the plating tank 203. As the steel sheet 6 passes near the anode 202 in the plating tank 203, a zinc plating layer is further formed. The steel sheet 6 on which the zinc plating layer has been formed is continuously conveyed out of the plating tank 203. In FIG. 2, the electrogalvanizing apparatus 200 is provided with a plurality of plating tanks 203. Each time the steel sheet 6 passes through the plurality of plating tanks 203, a zinc plating layer is formed. Thereby, the plated steel sheet 7 is manufactured continuously.

The electric zinc plating apparatus 200 in FIG. 2 is provided with a plurality of plating tanks 203. However, there may be only one plating tank 203. In addition, in the electric zinc plating apparatus 200 of FIG. 2, the plating tank 203 has an opening at the top. The steel sheet 6 is conveyed into the plating tank 203 through the opening at the top of the plating tank 203. The steel sheet 6 or the plated steel sheet 7 is taken out of the plating tank 203 through the opening at the top of the plating tank 203. As described above, the plating tank 203 in FIG. 2 is a so-called vertical plating tank 203. However, the plating tank 203 may be a so-called horizontal plating tank 203 having one opening on each of two opposing sides. In the case of the horizontal plating tank 203, the steel sheet 6 is conveyed into the plating tank 203 through an opening on one side of the plating tank 203. The steel sheet 6 or the plated steel sheet 7 is taken out of the plating tank 203 through the opening on the other side of the plating tank 203.

[Hot dip galvanizing device]

FIG. 3 is a side view showing the schematic configuration of an example of the hot-dip galvanizing apparatus 210. Referring to FIG. 3, the hot dip galvanizing device 210 includes a hot dip zinc pot 211, a sink roll 212, a support roll 213, a gas wiping device 214, and a turndown roll ( 215), a top roll 216, a plurality of conveyance rolls 217, and a skin pass mill 218. A hot-dip galvanizing bath is stored in the hot-dip zinc pot 211. The steel sheet 6 conveyed into the hot dip galvanizing device 210 has its conveyance direction changed downward by the turndown roll 215 . The steel sheet 6 is continuously immersed in the molten zinc plating bath stored in the molten zinc pot 211. A sink roll 212 is disposed inside the molten zinc pot 211. The sink roll 212 is immersed in a hot-dip galvanizing bath. The sink roll 212 changes the conveyance direction of the steel plate 6 from downward to upward. The support roll 213 is in the hot-dip galvanizing bath and is disposed above the sink roll 212. The support roll 213 supports the steel plate 6 conveyed upward with the steel plate 6 interposed therebetween.

The gas wiping device 214 is disposed above the liquid level of the hot-dip galvanizing bath. The gas wiping device 214 includes a pair of gas injection devices. A pair of gas injection devices has gas injection nozzles facing each other. The steel plate 6 passes between a pair of gas injection nozzles of the gas wiping device 214. A pair of gas injection nozzles sprays wiping gas onto the surface of the steel sheet 6 pulled from the hot-dip galvanizing bath. In this way, part of the molten zinc adhering to the surface of the steel plate 6 is scraped off. The steel sheet 7 from which a part of the molten zinc on the surface has been scraped off is conveyed to the skin pass mill 218 by the top roll 216 and the conveyance roll 217.

In the hot dip galvanizing device 210 shown in FIG. 3, the skin pass mill 218 is provided with a pair of work rolls and a pair of backup rolls. The pair of work rolls includes an upper work roll 219 and a lower work roll 220. The pair of backup rolls includes an upper backup roll 221 and a lower backup roll 222. The steel plate 6 is conveyed between the upper work roll 219 and the lower work roll 220 by the conveyance roll 217. The steel plate 6 is compressed between the upper work roll 219 and the lower work roll 220. Thereby, the plated steel sheet 7 is manufactured continuously. In addition, although not shown, the hot dip galvanizing apparatus 210 may further include an alloying furnace and a cooling furnace.

[About grinding equipment]

The grinding device 3 is disposed downstream of the plating device 2 and grinds the surface of the plating layer of the plated steel sheet 7 to form a texture on the surface of the plating layer. Textures include, for example, hairlines and vibrations.

As an example, a case of forming a hairline will be described. FIG. 4 is a cross-sectional view showing the schematic configuration of an example of the grinding device 3. Referring to FIG. 4 , the grinding device 3 is provided with a plurality of conveyance rolls 31, a pair of contact rolls 32, and an annular polishing belt 33. A pair of contact rolls 32 holds a ring-shaped polishing belt 33. As the pair of contact rolls 32 rotate, the annular polishing belt 33 moves between the pair of contact rolls 32. The plated steel sheet 7 is conveyed by the conveyance roll 31. The plated steel sheet 7 is conveyed between the conveyance roll 31 and the annular polishing belt 33 by the conveyance roll 31 . The plated steel sheet 7 is pressed and brought into contact with one of the pair of contact rolls 32 and the ring-shaped polishing belt 33 by the conveyance roll 31. As the pair of contact rolls 32 rotate, the annular polishing belt 33 grinds the surface plating layer of the plated steel sheet 7. As a result, a texture is formed on the surface of the plating layer.

The grinding device 3 in FIG. 4 is a grinding belt type grinding device 3. However, the grinding device 3 is not limited to this. The grinding device 3 may be provided with, for example, a grinding brush.

[About the first plating film thickness determination device]

The first plating film thickness determination device 4 determines first plating film thickness information regarding the film thickness of the plating layer before grinding, and outputs the first plating film thickness information. The first plating film thickness determination device 4 may be provided with a screen, and the first plating film thickness information may be output on this screen.

The first plating film thickness information is information about the film thickness before grinding of the plating layer. The first plating film thickness information may be, for example, the film thickness of the plating layer before grinding (μm), the plating adhesion amount of the plating layer before grinding (g/m ² ), or the plating conditions in the plating device 2. The plating conditions in the plating device 2 include, for example, the metal ion concentration in the plating solution, the sheet speed of the steel sheet in the plating solution, the width direction length of the steel sheet, the temperature of the plating solution, and/or pH. When the plating device 2 is a plating device 2 that performs electroplating, the plating conditions include the metal ion concentration in the plating solution, the sheet speed of the steel sheet in the plating solution, the length in the width direction of the steel sheet, current density, current efficiency, and /Or it may be the temperature of the plating solution. When the plating device 2 is a plating device 2 that performs hot dip plating, the plating conditions include the sheet-through speed of the steel sheet in the plating solution, the impact pressure of the wiping gas, and/or the rolling pressure in the skin pass mill 218. It can be Yul. That is, the first plating film thickness information includes the plating film thickness before grinding and all information that can be used to estimate the plating film thickness before grinding.

The first plating film thickness determination device 4 determines first plating film thickness information regarding the film thickness before grinding of the plating layer. The first plating film thickness information may be determined by measurement. Specifically, the film thickness of the plating layer (μm) after the plating layer is formed by the plating device 2 and before grinding of the plating layer by the grinding device 3, or the plating adhesion amount of the plating layer before grinding (g/m ² ) may be measured, and the measured film thickness (μm) or plating adhesion amount (g/m ² ) may be determined as the first plating film thickness information. In this case, the first plating film thickness determination device 4 is, for example, a fluorescence X-ray type film thickness meter. The first plating film thickness information may be plating conditions in the plating device 2. When determining plating conditions as first plating film thickness information, the first plating film thickness determination device 4 may measure the plating conditions. In this case, the first plating film thickness determination device 4 is, for example, a voltmeter, an ammeter, an ion meter, a thermometer, or a gas pressure meter.

Based on the plating conditions in the plating device 2, the film thickness (μm) of the plating layer before grinding or the plating adhesion amount (g/m ² ) of the plating layer before grinding may be calculated and determined as the first plating film thickness information. . The first plating film thickness determination device 4 measures the plating conditions and calculates the film thickness of the plating layer before grinding (μm) or the plating adhesion amount of the plating layer before grinding (g/m ² ) based on the measured plating conditions. So, print it out. For example, the first plating film thickness determination device 4 may be provided with a memory that stores a plating film thickness determination table. In this case, the first plating film thickness determination device 4 performs a grinding process corresponding to the sheet-threading speed of the steel sheet and the width direction length of the steel sheet input in advance and the measured plating conditions, for example, in the plating film thickness determination table. The film thickness (μm) of the previous plating layer or the plating adhesion amount (g/m ² ) of the plating layer before grinding may be specified and the first plating film thickness information may be determined. For example, the first plating film thickness determination device 4 uses a pre-stored calculation program, for example, based on the pre-input sheet speed of the steel sheet, the width direction length of the steel sheet, and the measured plating conditions, to perform grinding. The film thickness of the previous plating layer (μm) or the plating adhesion amount of the plating layer before grinding (g/m ² ) may be calculated to determine the first plating film thickness information.

[About the second plating film thickness determination device]

The second plating film thickness determination device 5 is disposed downstream of the grinding device 3, determines second plating film thickness information regarding the film thickness of the ground plating layer, and outputs the second plating film thickness information. . The second plating film thickness determination device 5 may be provided with a screen, and the second plating film thickness information may be output on this screen.

The second plating film thickness information may be, for example, the film thickness of the plating layer after grinding (μm) or the plating adhesion amount of the plating layer after grinding (g/m ² ). The second plating film thickness information is determined by measurement. Specifically, the film thickness (㎛) of the plating layer after grinding the plating layer by the grinding device 3, or the plating adhesion amount (g/m ² ) of the plating layer after grinding is measured, and the measured film thickness (㎛) or plating adhesion amount (g/m ² ) may be determined as the second plating film thickness information. In this case, the second plating film thickness determination device 5 is, for example, a fluorescence X-ray type film thickness meter.

The above-described apparatus for manufacturing a plated steel sheet with a texture (1) includes not only a second plating film thickness determination device (5) but also a first plating film thickness determination device (4). Therefore, when product defects based on insufficient film thickness of the plating layer and poor appearance occur, two factors are involved: (1) the plating amount of the plating layer formed in the plating layer formation process and (2) the grinding amount of the plating layer ground in the grinding process. Among these, it is easy to determine which factor caused the product defect.

[Method of manufacturing plated steel sheet with texture]

A method of manufacturing a plated steel sheet with a texture using the apparatus 1 for manufacturing a plated steel sheet with a texture described above will be described. The method for manufacturing a plated steel sheet with a texture of this embodiment includes a plating layer forming process, a grinding process, a plating film thickness determination process, and an adjustment process.

[Plating layer formation process]

In the plating layer formation process, a plating layer is formed on the surface of the steel sheet 6 by electroplating or hot dip plating to manufacture the plated steel sheet 7. When manufacturing the above-described textured plated steel sheet by electroplating, the plating device 2 is, for example, an electrogalvanizing device 200. When manufacturing the above-described textured plated steel sheet by a hot dip plating method, the plating device 2 is, for example, a hot dip galvanizing device 210.

[Electro galvanizing method]

As an example, a case where a plated steel sheet 7 is manufactured by forming a plating layer on the surface of the steel sheet 6 by electrogalvanizing will be described. The electrogalvanizing method may be performed by a known method. In this specification, the electric zinc plating method also includes the electric zinc alloy plating method. It is sufficient to use a known plating solution as the plating solution used in the electrogalvanizing method. Electrogalvanizing solutions include, for example, sulfuric acid bath, chloride bath, zincate bath, cyanide bath, pyrophosphoric acid bath, boric acid bath, citric acid bath, other complex baths, and combinations thereof. For example, the electric zinc alloy plating solution contains, in addition to Zn ions, one or more single ions or complex ions selected from the group consisting of Fe, Ni, Co, Cr, and C. Additionally, organic additives, etc. may be added to the plating solution as appropriate to obtain desired effects such as leveling effect or increase in hardness.

The plating solution used in the electrogalvanizing method may be, for example, a plating solution containing zinc sulfate heptahydrate: 200 to 400 g/L, sodium sulfate: 15 to 100 g/L, and having a pH of 1.0 to 2.5.

In the electrogalvanizing method, the zinc ion concentration, temperature, pH, sheet-threading speed of the steel sheet 6, current density, etc. in the electrozinc plating solution and the electrozinc alloy plating solution can be set appropriately. The zinc ion concentration in the plating solution is, for example, 0.8 to 1.5 mol/L. The temperature of the plating solution is, for example, 40 to 60°C. The sheet-threading speed of the steel plate 6 is, for example, 20 to 200 m/min. The current density is for example 10 to 200 A/dm ² . The thickness of the plating layer formed by performing the electrogalvanizing method can be adjusted, for example, by adjusting the sheet speed and/or current density of the steel sheet 6 in the plating solution when performing the electrogalvanizing method. As a result, a plating layer is formed on the surface of the steel sheet 6, and the plated steel sheet 7 can be manufactured.

[Hot dip galvanizing method]

As an example, a case where a plated steel sheet 7 is manufactured by forming a plating layer on the surface of the steel sheet 6 by a hot-dip galvanizing method will be described. The hot dip galvanizing method may be performed by a known method. The plating bath used in the hot dip galvanizing method is sufficient to use a known plating bath. The hot dip galvanizing bath may be, for example, a plating bath containing Al and the remainder being Zn and impurities. The impurity is for example Fe. In addition to Zn, Al and Fe, the hot dip galvanizing bath contains Mg, Si, Ca, Y, La, Ce, Sn, Bi, In, Cr, Ti, Ni, Co, V, Nb, Cu, Mn, Sr, It may contain one or more types selected from the group consisting of Sb, Pb, and B.

In the hot-dip galvanizing method, Al concentration in the hot-dip galvanizing bath, Fe concentration, concentration of other elements, temperature, pH, sheet speed of the steel sheet 6, impact pressure of wiping gas, and rolling pressure in the skin pass mill 218. The rate can be set appropriately. The Al concentration is, for example, 0.1 to 60.0 mass%. The Fe concentration is, for example, 0.01 to 0.5 mass%. In addition to Zn, Al and Fe, the hot dip galvanizing bath contains Mg, Si, Ca, Y, La, Ce, Sn, Bi, In, Cr, Ti, Ni, Co, V, Nb, Cu, Mn, Sr, Sb. , Pb, and B, the total content of these elements is 0.0 to 15.0 mass%, for example. The temperature of the hot dip galvanizing bath is, for example, 430 to 630°C. The sheet speed of the steel plate 6 is, for example, 60 to 150 m/min. The impact pressure of the wiping gas is for example 0 to 200 kPa. The reduction ratio in the skin pass mill 218 is, for example, 0 to 3.0%. The thickness of the plating layer formed by performing the hot-dip galvanizing method is, for example, determined by the sheet speed of the steel sheet 6 in the plating solution, the impact pressure of the wiping gas, and/or the skin pass mill during the hot-dip galvanizing method. It can be adjusted by adjusting the reduction ratio in (218). As a result, a plating layer is formed on the surface of the steel sheet 6, and the plated steel sheet 7 can be manufactured.

[Grinding process]

In the grinding process, the surface of the plating layer of the plated steel sheet 7 is ground to form a texture on the surface of the plating layer. The texture is, for example, a hairline. In the above-described apparatus 1 for manufacturing a plated steel sheet with a texture, the surface of the plating layer is ground by the grinding device 3 having the polishing belt 33 to form a hairline on the surface of the plating layer.

In the grinding process, the speed of passing the plated steel plate 7 through the grinding device 3, the rotational speed of the contact roll 32, and the pressing force of the contact roll 32 in pressing contact with the plated steel plate 7 are adjusted appropriately. This is possible. The sheet speed of the plated steel sheet 7 on the grinding device 3 is, for example, 20 to 200 m/min. The rotation speed of the contact roll 32 is, for example, 10 to 1500 rpm. The pressing force of the contact roll 32 in pressing contact with the plated steel sheet 7 is, for example, 0.01 to 0.10 MPa. The grinding amount of the plating layer to be ground in the grinding process can be adjusted by adjusting the rotational speed of the contact roll 32 and the pressing force of the contact roll 32 in pressing contact with the plated steel sheet 7. When the grinding device 3 is provided with a grinding brush, the amount of grinding can be adjusted, for example, by adjusting the rotation speed of the grinding brush and/or the pressing force of the pressing contact of the grinding brush with the plated steel plate 7. .

[Plating film thickness determination process]

In the plating film thickness determination process, first plating film thickness information regarding the film thickness of the plating layer of the plated steel sheet 7 after the plating layer formation process and before the grinding process, and first plating film thickness information regarding the film thickness of the plating layer of the plated steel sheet 8 after the grinding process. Determine second plating film thickness information. The first plating film thickness information may be determined by measuring the film thickness of the plating layer of the plated steel sheet after the plating layer formation process and before the grinding process. The first plating film thickness information may be plating conditions in the plating layer formation process. The first plating film thickness information may be determined based on the plating conditions in the plating layer formation process. The second plating film thickness information is determined by measuring the film thickness of the plating layer of the plated steel sheet after the grinding process.

[Adjustment process]

In the adjustment process, the plating amount of the plating layer formed in the plating layer forming process and the grinding amount of the surface of the plating layer ground in the grinding process are adjusted based on the first and second plating film thickness information.

For example, when the first plating film thickness information exceeds the standard range and the second plating film thickness information exceeds the standard range, the plating amount of the plating layer formed in the plating layer forming process is reduced, and the plating layer ground in the grinding process is reduced. The grinding amount may be increased. In this case, the reduction of the plating amount of the plating layer formed in the plating layer forming step and the increase in the grinding amount of the plating layer ground in the grinding step may be performed simultaneously. Alternatively, the first plating film thickness information is checked, and if the first plating film thickness information exceeds the standard range, the plating amount of the plating layer formed in the plating layer forming process is reduced while maintaining the grinding amount of the plating layer ground in the grinding process. After that, the second plating film thickness information is checked, and if the second plating film thickness information exceeds the standard range, the plating layer is ground in the grinding process while maintaining the plating amount of the plating layer formed in the plating layer forming process. You may increase the amount.

When the plating device 2 is an electric zinc plating device 200, the plating amount of the plating layer formed in the plating layer formation process can be reduced, for example, by the following method. For example, the sheet speed (m/min) of the steel sheet 6 in the plating solution may be increased. For example, the current density (A/dm ² ) may be lowered. Among these conditions, any one of them may be adjusted, or a combination of multiple conditions may be adjusted. When the plating device 2 is a hot-dip galvanizing device 210, the plating amount of the plating layer formed in the plating layer formation process can be reduced, for example, by the following method. For example, the sheet speed (m/min) of the steel sheet 6 in the plating solution may be increased. For example, the impact pressure of the wiping gas may be increased. For example, the reduction ratio in the skin pass mill 218 may be increased. Among these conditions, any one of them may be adjusted, or a combination of multiple conditions may be adjusted.

When increasing the grinding amount of the plating layer to be ground in the grinding process, for example, the sheet speed (m/min) of the plated steel sheet 7 to the grinding device 3 may be slowed, and the rotation speed of the contact roll 32 ( rpm) may be increased, and the pressing force (MPa) of the contact roll 32 against the plated steel sheet 7 may be increased. When the grinding device 3 is provided with a grinding brush, the rotational speed of the grinding brush may be increased, and the pressing force of the pressing contact with the plated steel plate 7 of the grinding brush may be increased. Among these conditions, any one of them may be adjusted, or a combination of multiple conditions may be adjusted.

For example, when the first plating film thickness information exceeds the standard range and the second plating film thickness information is less than the standard range, the plating amount of the plating layer formed in the plating layer forming process is reduced, and the plating layer ground in the grinding process is reduced. The amount may be reduced. In this case, the reduction of the plating amount of the plating layer formed in the plating layer formation step and the reduction of the grinding amount of the plating layer ground in the grinding step may be performed simultaneously. Alternatively, the first plating film thickness information is checked, and if the first plating film thickness information exceeds the standard range, the plating amount of the plating layer formed in the plating layer forming process is reduced while maintaining the grinding amount of the plating layer ground in the grinding process. After that, the second plating film thickness information is checked, and if the second plating film thickness information is less than the standard range, the grinding amount of the plating layer ground in the grinding process while maintaining the plating amount of the plating layer formed in the plating layer forming process. may be reduced.

When reducing the grinding amount of the plating layer to be ground in the grinding process, for example, the sheet speed (m/min) of the plated steel sheet 7 to the grinding device 3 may be increased, and the rotation speed of the contact roll 32 may be increased ( rpm) may be slowed, and the rolling force (MPa) of the pressing contact of the contact roll 32 with respect to the plated steel sheet 7 may be made low. When the grinding device 3 is provided with a grinding brush, the rotational speed of the grinding brush may be slowed, and the pressing force of the pressing contact with the plated steel plate 7 of the grinding brush may be lowered. Among these conditions, any one of them may be adjusted, or a combination of multiple conditions may be adjusted.

For example, if the first plating film thickness information is within the standard range and the second plating film thickness information is beyond the standard range, the plating amount of the plating layer formed in the plating layer forming process is maintained, and the plating amount of the plating layer ground in the grinding process is maintained. The grinding amount may be increased.

For example, when the first plating film thickness information is within the standard range and the second plating film thickness information is within the standard range, the plating amount of the plating layer formed in the plating layer forming process is maintained, and the plating layer ground in the grinding process is maintained. Maintain the quantity.

For example, when the first plating film thickness information is within the standard range and the second plating film thickness information is less than the standard range, the plating amount of the plating layer formed in the plating layer forming process is maintained, and the plating layer ground in the grinding process is ground. The amount may be reduced.

For example, if the first plating film thickness information is less than the standard range and the second plating film thickness information is greater than the standard range, the plating amount of the plating layer formed in the plating layer forming process is increased, and the plating layer ground in the grinding process is increased. The grinding amount may be increased. In this case, the increase in the plating amount of the plating layer formed in the plating layer forming step and the increase in the grinding amount of the plating layer ground in the grinding step may be performed simultaneously. Alternatively, the first plating film thickness information is checked, and if the first plating film thickness information is less than the standard range, the plating amount of the plating layer formed in the plating layer forming process is increased while maintaining the grinding amount of the plating layer ground in the grinding process, and , After that, the second plating film thickness information is checked, and if the second plating film thickness information exceeds the standard range, the grinding amount of the plating layer ground in the grinding process while maintaining the plating amount of the plating layer formed in the plating layer forming process. You may increase it.

When the plating device 2 is an electric zinc plating device 200, the plating amount of the plating layer formed in the plating layer forming process can be increased, for example, by the following method. For example, the sheet-threading speed (m/min) of the steel sheet 6 in the plating solution may be slowed. For example, the current density (A/dm ² ) may be increased. Among these conditions, any one of them may be adjusted, or a combination of multiple conditions may be adjusted. When the plating device 2 is a hot-dip galvanizing device 210, the plating amount of the plating layer formed in the plating layer formation process can be increased, for example, by the following method. For example, the sheet-threading speed (m/min) of the steel sheet 6 in the plating solution may be slowed. For example, the impact pressure of the wiping gas may be lowered. For example, the reduction ratio in the skin pass mill 218 may be lowered. Among these conditions, any one of them may be adjusted, or a combination of multiple conditions may be adjusted.

For example, when the first plating film thickness information is less than the standard range and the second plating film thickness information is less than the standard range, the plating amount of the plating layer formed in the plating layer forming process is increased, and the plating layer is ground in the grinding process. The amount may be reduced. In this case, the increase in the plating amount of the plating layer formed in the plating layer forming step and the reduction in the grinding amount of the plating layer ground in the grinding step may be performed simultaneously. Alternatively, the first plating film thickness information is checked, and if the first plating film thickness information is less than the standard range, the plating amount of the plating layer formed in the plating layer forming process is increased while maintaining the grinding amount of the plating layer ground in the grinding process, and , After that, the second plating film thickness information is checked, and if the second plating film thickness information is less than the standard range, the grinding amount of the plating layer ground in the grinding process is determined while maintaining the plating amount of the plating layer formed in the plating layer forming process. It may be reduced.

The method for manufacturing a plated steel sheet with a texture of the present embodiment is carried out using a continuous line type plated steel sheet with a texture manufacturing apparatus. Therefore, between the plating layer forming process and the grinding process, winding of the steel sheet and rewinding of the steel sheet are not performed. In addition, in the method of manufacturing a plated steel sheet with a texture of the present embodiment, in the adjustment step, for the same steel sheet coil as the steel coil for which the first and second plated film thickness information was acquired, the first and second plated film thickness information Based on this, adjust the plating amount and grinding amount.

The standard range of the first plating film thickness information can be set appropriately and is not particularly limited. For example, when the first plating film thickness information is the plating adhesion amount (g/m ² ), the standard range of the first plating film thickness information may be, for example, 10 to 320 g/m ² . When the first plating film thickness information is a current density (kA/m ² ) among the plating conditions in the plating device 2, the reference range of the first plating film thickness information is, for example, 1 to 20 kA/m ² You can continue. When the first plating film thickness information is the plate speed (m/min) among the plating conditions in the plating apparatus 2, the reference range of the first plating film thickness information may be, for example, 30 to 200 m/min. . When the first plating film thickness information is the impact pressure (kPa) of the wiping gas among the plating conditions in the plating device 2, the reference range of the first plating film thickness information may be, for example, 0 to 200 kPa. . When the first plating film thickness information is the reduction ratio in the skin pass mill 218 among the plating conditions in the plating device 2, the reference range of the first plating film thickness information is, for example, 0 to 3.0%. It's okay.

The standard range of the second plating film thickness information can be set appropriately and is not particularly limited. For example, when the second plating film thickness information is the plating adhesion amount (g/m ² ), the standard range of the second plating film thickness information may be, for example, 5 to 300 g/m ² .

As described above, in the method of manufacturing a plated steel sheet with a texture of the present embodiment, in the plating film thickness determination step, not only the second plating film thickness information regarding the film thickness of the plating layer after grinding is used, but also the second plating film thickness information regarding the film thickness of the plating layer before grinding. Determining first plating film thickness information, and in the adjustment step, based on the first and second plating film thickness information, plating amount of the plating layer formed in the plating layer forming step, and grinding the surface of the plating layer to be ground in the grinding step. Adjust the amount. As a result, when product defects based on insufficient film thickness of the plating layer and poor appearance occur, two factors are involved: (1) the plating amount of the plating layer formed in the plating layer formation process and (2) the grinding amount of the plating layer ground in the grinding process. It is possible to quickly determine which factor caused a product defect. In addition, by excluding the causes of product defects (1) or (2), product defects in which corrosion resistance is reduced due to insufficient plating layer thickness and/or product defects in which appearance defects occur due to insufficient texture formation are suppressed. can do. In addition, even if it is a continuous line type manufacturing device, the cause of product defects can be quickly identified and fed back, so product defects can be suppressed while suppressing a decrease in production speed.

[Second Embodiment]

FIG. 5 is an overall view of the apparatus 1 for manufacturing a plated steel sheet with a texture when equipped with a control device in the second embodiment. Referring to FIG. 5 , in the second embodiment, the manufacturing apparatus 1 of a plated steel sheet with a texture has the same configuration as the manufacturing apparatus 1 of a plated steel sheet with a texture of the first embodiment, and includes a control device 9 ) is further provided. In the second embodiment, the first plating film thickness determination device 4 outputs the first plating film thickness information to the control device 9, and the second plating film thickness determination device 5 outputs the first plating film thickness information to the control device 9. Thickness information is output to the control device 9.

[About the control device]

The control device 9 controls the plating device 2 to adjust the plating amount of the plating layer formed on the surface of the steel sheet 6 by the plating device 2 based on the first plating film thickness information and the second plating film thickness information. and further controls the grinding device 3 to adjust the grinding amount of the surface of the plating layer to be ground by the grinding device 3 based on the first plating film thickness information and the second plating film thickness information. When equipped with the control device 9, the apparatus 1 for manufacturing a plated steel sheet with a texture is more likely to specify the cause of product defects based on insufficient film thickness of the plating layer and appearance defects. Therefore, it is easier to suppress product defects in which corrosion resistance is reduced due to insufficient film thickness of the plating layer and/or product defects in which appearance defects occur due to insufficient texture formation. When provided with the control device 9, the production device 1 for a plated steel sheet with a texture can facilitate the suppression of unnecessary manufacturing costs in addition to suppressing product defects.

Figure 6 is a functional block diagram of the control device 9. Referring to FIG. 6, the control device 9 includes an adjustment unit 91, a plating device control section 92, and a grinding device control section 93.

The adjustment unit 91 controls the plating device 2 and the grinding device based on the first and second plating film thickness information output from the first plating film thickness determination device 4 and the second plating film thickness determination device 5. Determine how to control device 3 and output the results. The plating device control unit 92 controls the plating device 2 based on the results determined by the adjustment unit 91. When the plating device 2 is an electric zinc plating device 200, the plating device control unit 92 controls, for example, the sheet-through speed (m/min) of the steel sheet 6 in the plating solution, and/or the current density ( A/dm ² ) is controlled. When the plating device 2 is a hot-dip galvanizing device 210, the plating device control unit 92 controls, for example, the sheet speed (m/min) of the steel sheet 6 in the plating solution and the collision pressure of the wiping gas. (kPa), and/or the reduction rate (%) in the skin pass mill 218 is controlled. Thereby, the plating amount of the plating layer formed by the plating device 2 is adjusted. The grinding device control unit 93 controls the grinding device 3 based on the results determined by the adjustment unit 91. When the grinding device 3 is a grinding device 3 provided with an abrasive belt 33, the grinding device control unit 93 controls, for example, the sheet speed of the plated steel sheet 7 to the grinding device 3 ( m/min), the rotational speed (rpm) of the contact roll 32, and the pressing force (MPa) of the pressing contact of the contact roll 32 with respect to the plated steel sheet 7. When the grinding device 3 is a grinding device 3 provided with a grinding brush, the grinding device control unit 93 controls, for example, the rotation speed of the grinding brush and the pressing contact of the grinding brush with the plated steel plate 7. Controls the pressing force. Thereby, the amount of grinding of the surface of the plating layer to be ground by the grinding device 3 is adjusted.

FIG. 7 is a functional block diagram showing an example of the hardware configuration of the control device 9. Referring to FIG. 7, the control device 9 includes a central processing unit (CPU: Central Processing Unit) 94, a memory 95, and an interface 96 (in FIG. 7, indicated as I/F). ) and a hard disk 97 (indicated as HDD in FIG. 7). These structures are connected to each other by a bus. The hard disk 97 stores a plating condition adjustment program and a grinding condition adjustment program. The plating condition adjustment program and the grinding condition adjustment program are loaded into the memory 95 and executed by the CPU 94, thereby realizing the operations of the above-described adjustment unit 91, plating device control section 92, and grinding device control section 93. do. The hard disk 97 is not particularly limited as long as it is a storage medium. For example, it could be an SSD.

[Regarding the operation of the apparatus 1 for manufacturing plated steel sheets with texture]

The operation of the apparatus 1 for manufacturing a textured plated steel sheet having the above-described configuration will be described. 8 to 11 are operational flowcharts of the apparatus 1 for manufacturing a textured plated steel sheet including the control device 9.

Referring to FIG. 8, the control device 9 first acquires the first plating film thickness information output from the first plating film thickness determination device 4 (S1). The control device 9 then acquires the second plating film thickness information output from the second plating film thickness determination device 5 (S2). In FIG. 8, after acquiring the first plating film thickness information, the second plating film thickness information is acquired. However, the control device 9 may acquire the first plating film thickness information after acquiring the second plating film thickness information, or may acquire the first and second plating film thickness information simultaneously.

The adjustment unit 91 of the control device 9 obtains grinding amount information, which is information regarding the grinding amount in the grinding device 3, based on the obtained first plating film thickness information and second plating film thickness information (S3 ). For example, when the first and second plating film thickness information is the film thickness of the plating layer (㎛), the film thickness of the plating layer after grinding is obtained from the first plating film thickness information (㎛), which is the film thickness of the plating layer before grinding. By subtracting the second plating film thickness information (μm), the grinding amount information (μm) is obtained. The same applies to the case where the first and second plating film thickness information is the plating adhesion amount (g/m ² ).

When the first plating film thickness information is the plating conditions of the plating device 2, the adjustment unit 91 of the control device 9 determines the film thickness (μm) of the plating layer before grinding from the plating conditions of the plating device 2. Alternatively, the plating adhesion amount (g/m ² ) before grinding of the plating layer may be calculated. By subtracting the measured second plating film thickness (㎛) or second plating adhesion amount (g/m ² ) from the calculated first plating film thickness (㎛) or first plating adhesion amount (g/m ² ), the grinding amount You can ask for information.

The operation after obtaining the grinding amount information (S3) follows any one of patterns 1 to 9.

[For patterns 1 to 3]

The adjustment unit 91 of the control device 9 determines whether the second plating film thickness information is within the reference range (S4 in FIG. 8). When the second plating film thickness information exceeds the standard range (“Exceeds the standard range” in S4 of FIG. 8), the adjustment unit 91 of the control device 9 next determines whether the grinding amount information is within the standard range ( Figure 9 S5). Depending on whether the grinding amount information is above the standard range, below the standard range, or within the standard range, the adjustment unit 91 of the control device 9 issues an instruction for one of patterns 1 to 3.

[For pattern 1]

When the grinding amount information exceeds the standard range (“Exceeds the standard range” in S5 in FIG. 9 ), the adjustment unit 91 of the control device 9 determines that the second plating film thickness information exceeds the standard range, and the grinding amount information It is determined that the standard range is exceeded, and pattern 1 is instructed (S6).

If the second plating film thickness information exceeds the standard range and the grinding amount information exceeds the standard range, the plating amount of the plating layer formed by the plating device 2 is too large, and the plating layer is ground more than necessary by the grinding device 3. Because of this, unnecessary costs increase. Therefore, considering cost, it is desirable to change the operating conditions to reduce the plating amount of the plating layer formed by the plating device 2 and to reduce the grinding amount of the plating layer ground by the grinding device 2.

In pattern 1, the plating device 2 is controlled to reduce the amount of plating of the plating layer formed by the plating device 2, and a grinding device ( Instructions are given to control 3). In response to instructions from pattern 1, the plating device control unit 92 controls the plating device 2 to reduce the plating amount of the plating layer formed by the plating device 2. In response to instructions from pattern 1, the grinding device control unit 93 controls the grinding device 3 to reduce the grinding amount of the surface of the plating layer to be ground by the grinding device 3.

[For pattern 2]

When the grinding amount information is less than the standard range (“less than the standard range” in S5 in FIG. 9 ), the adjustment unit 91 of the control device 9 determines that the second plating film thickness information is beyond the standard range, and the grinding amount information is set to the standard. It is determined that it is below the range, and pattern 2 is instructed (S7 in FIG. 9).

If the second plating film thickness information exceeds the standard range and the grinding amount information is less than the standard range, the surface of the plating layer is not sufficiently ground by the grinding device 3, and therefore a sufficient texture is not formed on the surface of the plating layer. , the appearance becomes defective. In this case, since the second plating film thickness information exceeds the standard range, it can be seen that product defects are occurring due to the grinding amount of the plating layer ground by the grinding device 3. In this case, it is necessary to change the operating conditions and increase the grinding amount of the plating layer ground by the grinding device 3 to form a sufficient texture on the surface of the plating layer.

In pattern 2, the plating device 2 is controlled to maintain the plating amount of the plating layer formed by the plating device 2, and the grinding device 3 is controlled to increase the grinding amount of the surface of the plating layer ground by the grinding device 3. ) is given to control. In response to instructions from pattern 2, the grinding device control unit 93 controls the plating device 2 to maintain the plating amount of the plating layer formed by the plating device 2, and further controls the plating device 2 to maintain the plating amount of the plating layer formed by the grinding device 3. The grinding device 3 is controlled to increase the grinding amount of the surface.

[For pattern 3]

When the grinding amount information is within the standard range (“within the standard range” in S5 in FIG. 9 ), the adjustment unit 91 of the control device 9 determines that the second plating film thickness information is beyond the standard range and the grinding amount information is within the standard range. It is determined that it is within the range, and pattern 3 is instructed (S8 in FIG. 9).

When the second plating film thickness information exceeds the standard range and the grinding amount information is within the standard range, unnecessary costs increase because the plating amount of the plating layer formed by the plating device 2 is too large. Therefore, considering cost, it is preferable to change the operating conditions and reduce the plating amount of the plating layer formed by the plating device 2.

In pattern 3, the plating device 2 is controlled to reduce the plating amount of the plating layer formed by the plating device 2, and the grinding device 3 is controlled to maintain the grinding amount of the surface of the plating layer ground by the grinding device 3. ) is given to control. In response to instructions from pattern 3, the plating device control unit 92 controls the plating device 2 to reduce the plating amount of the plating layer formed by the plating device 2 and further reduces the plating layer to be ground by the grinding device 3. The grinding device 3 is controlled to maintain the grinding amount of the surface.

[For patterns 4 to 6]

The adjustment unit 91 of the control device 9 determines whether the second plating film thickness information is within the reference range (S4 in FIG. 8). If the second plating film thickness information is less than the standard range (“less than the standard range” in S4 of FIG. 8), the adjustment unit 91 of the control device 9 next determines whether the grinding amount information is within the standard range (FIG. S9 of 10). Depending on whether the grinding amount information is greater than the standard range, less than the standard range, or within the standard range, the adjustment unit 91 of the control device 9 issues an instruction for one of patterns 4 to 6.

[For pattern 4]

When the grinding amount information exceeds the standard range (“exceeds the standard range” in S9 in FIG. 10), the adjustment unit 91 of the control device 9 determines that the second plating film thickness information is less than the standard range and the grinding amount information It is determined that the standard range is exceeded, and pattern 4 is instructed (S10 in FIG. 10).

If the second plating film thickness information is less than the standard range and the grinding amount information is more than the standard range, the corrosion resistance of the plated steel sheet with the texture is reduced due to the lack of the final film thickness of the plating layer because the second plating film thickness information is less than the standard range. This causes the product to become defective. Also, in this case, since the grinding amount information exceeds the standard range, it can be seen that product defects are occurring due to the grinding amount of the plating layer ground by the grinding device 3. In this case, it is necessary to change the operating conditions and reduce the grinding amount of the plating layer ground by the grinding device 3.

In pattern 4, the plating device 2 is controlled to maintain the plating amount of the plating layer formed by the plating device 2, and the grinding device 3 is used to reduce the grinding amount of the surface of the plating layer ground by the grinding device 3. ) is given to control. In response to instructions from pattern 4, the grinding device control unit 93 controls the plating device 2 to maintain the plating amount of the plating layer formed by the plating device 2, and also controls the plating device 2 to maintain the plating amount of the plating layer formed by the grinding device 3. The grinding device 3 is controlled to reduce the grinding amount of the surface.

[For pattern 5]

When the grinding amount information is less than the standard range (“below the standard range” in S9 in FIG. 10), the adjustment unit 91 of the control device 9 determines that the second plating film thickness information is less than the standard range and the grinding amount information is set to the standard. It is determined that it is below the range, and pattern 5 is instructed (S11 in FIG. 10).

When the second plating film thickness information is less than the standard range and the grinding amount information is less than the standard range, since the second plating film thickness information is less than the standard range, the corrosion resistance of the textured plated steel sheet is lowered due to the lack of the final film thickness of the plating layer. , the product becomes defective. In this case as well, since the grinding amount information is below the standard range, the surface of the plating layer is not sufficiently ground by the grinding device 3, and therefore a sufficient texture is not formed on the surface of the plating layer, resulting in poor appearance. In addition, since the second plating film thickness information is below the standard range, product defects occur due to both the plating amount of the plating layer formed by the plating device 2 and the grinding amount of the plating layer ground by the grinding device 3. Able to know. In this case, it is necessary to change the operating conditions to increase the plating amount of the plating layer formed by the plating device 2 and to increase the grinding amount of the plating layer ground by the grinding device 3.

In pattern 5, the plating device 2 is controlled to increase the amount of plating of the plating layer formed by the plating device 2, and a grinding device ( Instructions are given to control 3). In response to instructions from pattern 5, the plating device control unit 92 controls the plating device 2 to increase the plating amount of the plating layer formed by the plating device 2. In response to the instructions in pattern 5, the grinding device control unit 93 controls the grinding device 3 to increase the grinding amount of the surface of the plating layer to be ground by the grinding device 3.

[For pattern 6]

When the grinding amount information is within the standard range (“within the standard range” in S9 in FIG. 10), the adjustment unit 91 of the control device 9 determines that the second plating film thickness information is less than the standard range and the grinding amount information is within the standard range. It is determined that it is within the range, and pattern 6 is instructed (S12 in FIG. 10).

If the second plating film thickness information is less than the standard range and the grinding amount information is within the standard range, since the second plating film thickness information is less than the standard range, the corrosion resistance of the textured plated steel sheet is lowered due to insufficient final film thickness of the plating layer. , the product becomes defective. In this case, since the grinding amount information is within the standard range, it can be seen that the plating amount of the plating layer formed by the plating device 2 is insufficient. In this case, it is necessary to change the operating conditions and increase the plating amount of the plating layer formed by the plating device 2.

In pattern 6, the plating device 2 is controlled to increase the plating amount of the plating layer formed by the plating device 2, and the grinding device 3 is controlled to maintain the grinding amount of the surface of the plating layer ground by the grinding device 3. ) is given to control. In response to instructions from pattern 6, the plating device control unit 92 controls the plating device 2 to increase the plating amount of the plating layer formed by the plating device 2, and also controls the plating layer to be ground by the grinding device 3. The grinding device 3 is controlled to maintain the grinding amount of the surface.

[For patterns 7 to 9]

The adjustment unit 91 of the control device 9 determines whether the second plating film thickness information is within the reference range (S4 in FIG. 8). If the second plating film thickness information is within the standard range (“within the standard range” in S4 of FIG. 8), the adjustment unit 91 of the control device 9 next determines whether the grinding amount information is within the standard range (FIG. S13 of 11). Depending on whether the grinding amount information is greater than the standard range, less than the standard range, or within the standard range, the adjustment unit 91 of the control device 9 issues an instruction for one of patterns 7 to 9.

[For pattern 7]

When the grinding amount information exceeds the standard range (“Exceeds the standard range” in S13 in FIG. 11), the adjustment unit 91 of the control device 9 determines that the second plating film thickness information is within the standard range and the grinding amount information It is determined that the standard range is exceeded, and pattern 7 is instructed (S14 in FIG. 11).

If the second plating film thickness information is within the standard range and the grinding amount information is beyond the standard range, the surface of the plating layer is ground by the grinding device 3 beyond the required amount. Therefore, unnecessary costs increase. Therefore, considering cost, it is desirable to reduce the grinding amount of the plating layer ground by the grinding device 3.

In pattern 7, the plating device 2 is controlled to maintain the plating amount of the plating layer formed by the plating device 2, and the grinding device 3 is used to reduce the grinding amount of the surface of the plating layer ground by the grinding device 3. ) is given to control. In response to instructions from pattern 7, the grinding device control unit 93 controls the plating device 2 to maintain the plating amount of the plating layer formed by the plating device 2, and also controls the plating device 2 to maintain the plating amount of the plating layer formed by the grinding device 3. The grinding device 3 is controlled to reduce the grinding amount of the surface.

[For pattern 8]

When the grinding amount information is less than the standard range (“less than the standard range” in S13 in FIG. 11), the adjustment unit 91 of the control device 9 determines that the second plating film thickness information is within the standard range and the grinding amount information is within the standard range. It is determined that it is below the range, and pattern 8 is instructed (S15 in FIG. 11).

If the second plating film thickness information is within the standard range and the grinding amount information is less than the standard range, the surface of the plating layer is not sufficiently ground by the grinding device 3 because the grinding amount information is less than the standard range. Sufficient texture is not formed on the surface, resulting in poor appearance. Also, in this case, since the second plating film thickness information is within the standard range, it can be seen that product defects are occurring due to the grinding amount of the plating layer ground by the grinding device 3. In this case, it is necessary to increase the grinding amount of the plating layer ground by the grinding device 3.

In pattern 8, the plating device 2 is controlled to maintain the plating amount of the plating layer formed by the plating device 2, and the grinding device 3 is controlled to increase the grinding amount of the surface of the plating layer ground by the grinding device 3. ) is given to control. In response to instructions from pattern 8, the grinding device control unit 93 controls the plating device 2 to maintain the plating amount of the plating layer formed by the plating device 2, and further controls the plating device 2 to maintain the plating amount of the plating layer formed by the grinding device 3. The grinding device 3 is controlled to increase the grinding amount of the surface.

[For pattern 9]

When the grinding amount information is within the standard range (“within the standard range” in S13 of FIG. 11 ), the adjustment unit 91 of the control device 9 determines that the second plating film thickness information is within the standard range and the grinding amount information is within the standard range. It is determined that it is within the range, and pattern 9 is instructed (S16 in FIG. 11).

When the second plating film thickness information is within the standard range and the grinding amount information is within the standard range, product defects based on insufficient final film thickness of the plating layer and appearance defects do not occur, and costs are appropriately maintained. You can see that In this case, the operating conditions can be maintained.

In pattern 9, the plating device 2 is controlled to maintain the plating amount of the plating layer formed by the plating device 2, and the grinding device 3 is controlled to maintain the grinding amount of the surface of the plating layer ground by the grinding device 3. Instructions are given to control. In response to instructions from pattern 9, the plating device control unit 92 controls the plating device 2 to maintain the plating amount of the plating layer formed by the plating device 2 and also controls the plating layer to be ground by the grinding device 3. The grinding device 3 is controlled to maintain the grinding amount of the surface.

By the above operation, the apparatus 1 for manufacturing a plated steel sheet with a texture of the present embodiment operates the plating apparatus 2 based on the first plating film thickness information and the second plating film thickness information by the control device 9. ) controls the plating device 2 to adjust the plating amount of the plating layer formed on the surface of the steel sheet 6, and also controls the grinding device 3 to adjust the grinding amount of the surface of the plating layer to be ground with the grinding device 3. While controlling, a plated steel sheet 8 with a texture is manufactured. This makes it easier to specify the cause of product defects based on insufficient film thickness of the plating layer and poor appearance. In this case, it is easier to suppress product defects in which corrosion resistance is reduced due to insufficient film thickness of the plating layer and/or product defects in which appearance defects occur due to insufficient texture formation. When equipped with the control device 9, the production device 1 for a plated steel sheet with texture can also facilitate the suppression of production costs as well as product defects.

[Method of manufacturing plated steel sheet with texture]

The method of manufacturing a textured plated steel sheet equipped with the control device 9 of this embodiment is the same as that of the first embodiment except that the manufacturing device of a textured plated steel sheet provided with the control device 9 is used.

[Third Embodiment]

In the second embodiment, the control device 9 is used, but without using the control device 9, the grinding amount by the grinding device is determined based on the first plating film thickness information and the second plating film thickness information. The grinding amount information, which is information, may be obtained, and the plating amount of the plating layer formed in the plating layer forming process and the grinding amount of the surface of the plating layer ground in the grinding process may be adjusted based on the second plating film thickness information and the grinding amount information. The apparatus 1 for manufacturing a plated steel sheet with a texture used in the third embodiment is the same as that in the first embodiment.

[Method of manufacturing plated steel sheet with texture]

The method of manufacturing a plated steel sheet with a texture according to the third embodiment includes a plating layer forming process, a grinding process, a plating film thickness determination process, and an adjustment process. Processes other than the adjustment process are the same as those in the first embodiment. In the third embodiment, in the adjustment process, grinding amount information, which is information about the grinding amount by the grinding device, is obtained, and based on the second plating film thickness information and grinding amount information, the plating amount of the plating layer formed in the plating layer forming step is obtained. , and adjust the grinding amount of the surface of the plating layer to be ground in the grinding process.

[Adjustment process]

In the adjustment process, grinding amount information is obtained based on the first plating film thickness and the second plating film thickness. The method of obtaining the grinding amount information is the same as the second embodiment, except that the control device 9 is not used. In the adjustment process, based on the second plating film thickness information and the grinding amount information, the plating amount of the plating layer formed in the plating layer forming process and the grinding amount of the surface of the plating layer ground in the grinding process are adjusted based on the following patterns 1 to 9. Adjust.

[Pattern 1]

When the second plating film thickness information exceeds the standard range and the grinding amount information exceeds the standard range, the plating amount of the plating layer formed in the plating layer forming process is reduced, and the grinding amount of the surface of the plating layer ground in the grinding process is reduced. Adjust it to do so. The preparation method for reducing the plating amount of the plating layer formed in the plating layer forming step and the adjustment method for reducing the grinding amount of the surface of the plating layer ground in the grinding step are the same as those in the first embodiment.

[Pattern 2]

When the second plating film thickness information exceeds the standard range and the grinding amount information is less than the standard range, the plating amount of the plating layer formed in the plating layer forming process is maintained and the grinding amount of the surface of the plating layer ground in the grinding process is increased. Adjust so that The adjustment method for increasing the grinding amount of the surface of the plating layer to be ground in the grinding process is the same as that in the first embodiment.

[Pattern 3]

When the second plating film thickness information exceeds the standard range and the grinding amount information is within the standard range, the plating amount of the plating layer formed in the plating layer forming process is reduced and the grinding amount of the surface of the plating layer ground in the grinding process is maintained. Adjust. The adjustment method for reducing the plating amount of the plating layer formed in the plating layer formation process is the same as that in the first embodiment.

[Pattern 4]

When the second plating film thickness information is less than the standard range and the grinding amount information is more than the standard range, the plating amount of the plating layer formed in the plating layer forming process is maintained, and the grinding amount of the surface of the plating layer ground in the grinding process is reduced. Adjust it to do so. The adjustment method for reducing the grinding amount of the surface of the plating layer to be ground in the grinding process is the same as that in the first embodiment.

[Pattern 5]

When the second plating film thickness information is less than the standard range and the grinding amount information is less than the standard range, the plating amount of the plating layer formed in the plating layer forming process is increased, and the grinding amount of the surface of the plating layer ground in the grinding process is increased. Adjust so that The preparation method for increasing the plating amount of the plating layer formed in the plating layer forming process and the adjustment method for increasing the grinding amount of the surface of the plating layer ground in the grinding process are the same as those in the first embodiment.

[Pattern 6]

When the second plating film thickness information is less than the standard range and the grinding amount information is within the standard range, the plating amount of the plating layer formed in the plating layer forming process is increased and the grinding amount of the surface of the plating layer ground in the grinding process is maintained. Adjust. The adjustment method for increasing the plating amount of the plating layer formed in the plating layer formation process is the same as that in the first embodiment.

[Pattern 7]

When the second plating film thickness information is within the standard range and the grinding amount information is beyond the standard range, the plating amount of the plating layer formed in the plating layer forming process is maintained, and the grinding amount of the surface of the plating layer ground in the grinding process is reduced. Adjust it to do so. The adjustment method for reducing the grinding amount of the surface of the plating layer to be ground in the grinding process is the same as that in the first embodiment.

[Pattern 8]

When the second plating film thickness information is within the standard range and the grinding amount information is less than the standard range, the plating amount of the plating layer formed in the plating layer forming process is maintained and the grinding amount of the surface of the plating layer ground in the grinding process is increased. Adjust so that The adjustment method for increasing the grinding amount of the surface of the plating layer to be ground in the grinding process is the same as that in the first embodiment.

[Pattern 9]

When the second plating film thickness information is within the standard range and the grinding amount information is within the standard range, the plating amount of the plating layer formed in the plating layer forming process and the grinding amount of the surface of the plating layer ground in the grinding process are adjusted to maintain. Specifically, the plating conditions in the plating layer formation process and the grinding conditions in the grinding process are maintained.

In the above manufacturing process, not only product defects but also manufacturing costs can be suppressed.

[Fourth Embodiment]

The apparatus 1 for manufacturing a plated steel sheet with a texture includes a plating apparatus 2, a grinding apparatus 3, a first plating film thickness determination device 4, and a second plating film thickness determination device 5. , a coating film forming device may be provided. The coating film forming device is disposed downstream of the grinding device 3 and forms a coating film on the surface of the ground plating layer.

[Method of manufacturing plated steel sheet with texture]

When forming a coating film, the method of manufacturing a plated steel sheet with a texture includes a coating film forming process in addition to a plating layer forming process, a grinding process, a plating film thickness determination process, and an adjustment process.

[Coating film formation process]

The method for forming the coating film may be a known method. When forming an organic coating film, prepare a paint constituting the organic coating. The prepared paint is applied on the plating layer by a spray method, a roll coater method, a curtain coater method, or an immersion pull method. Thereafter, the paint on the plating layer is naturally dried or bake-dried to form an organic coating film. Drying temperature, drying time, baking temperature, and baking time can be adjusted appropriately.

When forming an inorganic coating film as a coating film, a chemical for the inorganic coating film is applied on the plating layer by a roll coater method, immersion Ringer method, spray Ringer method, electrolytic method, etc. The chemical applied on the plating layer is naturally dried or bake-dried to form an inorganic coating film. Drying temperature, drying time, baking temperature, and baking time can be adjusted appropriately.

Other manufacturing processes in the fourth embodiment are the same as those in the first embodiment.

[Fifth Embodiment]

The apparatus 1 for manufacturing a plated steel sheet with a texture includes a plating apparatus 2, a grinding apparatus 3, a first plating film thickness determination device 4, and a second plating film thickness determination device 5. , one or more gloss meters may be provided. The gloss meter is disposed downstream of the grinding device 3 and evaluates the appearance of the surface of the plated steel sheet provided with the ground plated layer.

The gloss meter includes two gloss meters: a gloss meter that measures the gloss of the surface of the plated steel sheet in the longitudinal direction of the plated steel sheet, and a gloss meter that measures the gloss of the surface of the plated steel sheet in the width direction of the plated steel sheet. It's okay. In this case, the appearance of the surface of the plated steel sheet provided with the ground plating layer can be evaluated with higher precision.

[Method of manufacturing plated steel sheet with texture]

When evaluating the appearance of the surface of a plated steel sheet with a ground plating layer, the method of manufacturing a plated steel sheet with a texture includes a plating layer forming process, a grinding process, a plating film thickness determination process, and an adjustment process, in addition to an appearance evaluation process. Equipped with In the appearance evaluation process, the appearance of the plated steel sheet after the grinding process is evaluated by glossiness.

[Appearance evaluation process]

In the appearance evaluation process, the appearance of the plated steel sheet after the grinding process is evaluated by glossiness. In the appearance evaluation process, the glossiness of the surface of the plated steel sheet measured toward the longitudinal direction of the plated steel sheet and the glossiness of the surface of the plated steel plate measured toward the width direction of the plated steel sheet are based on two glossiness values. You may evaluate the appearance of .

[Adjustment process]

In the method of manufacturing a plated steel sheet with a texture of the present embodiment, in the adjustment step, a plating layer is formed based on the first plating film thickness information, the second plating film thickness information, and the glossiness of the surface of the plated steel sheet after the grinding process. The plating amount of the plating layer formed in the process and the grinding amount of the surface of the plating layer ground in the grinding process are adjusted.

When evaluating the appearance based on glossiness, the appearance of the plated steel sheet can be evaluated with higher precision compared to the case where the appearance is estimated based on the first plating film thickness information and the second plating film thickness information. Therefore, when evaluating the appearance of a plated steel sheet based on glossiness, a standard for the appearance of the plated steel sheet can be set under more stringent conditions. However, in this case, even if the first plating film thickness information and the second plating film thickness information are within the standard range, based on the evaluation of the appearance of the plated steel sheet based on the glossiness, the texture is not sufficiently formed, resulting in a defective appearance. There are cases. In this case, you may adjust the plating amount of the plating layer formed in the plating layer formation process and the grinding amount of the surface of the plating layer ground in the grinding process.

For example, when the first plating film thickness information and the second plating film thickness information are within the standard range, and the texture is not sufficiently formed, and the appearance evaluation of the plated steel sheet based on glossiness is poor, in the plating layer forming process The grinding amount of the plating layer ground in the grinding process may be increased while maintaining the plating amount of the plating layer to be formed. The method of increasing the grinding amount of the plating layer to be ground in the grinding process is the same as that of the first embodiment.

At this time, when the grinding amount of the plating layer ground in the grinding process is increased while maintaining the plating amount of the plating layer formed in the plating layer forming process, such as the second plating film thickness information is within the reference range but close to the lower limit, the second If the plating film thickness information is expected to be less than the standard range, the plating amount of the plating layer formed in the plating layer forming process may be increased, and the grinding amount of the plating layer ground in the grinding process may be increased. The method of increasing the plating amount of the plating layer formed in the plating layer formation process is the same as that in the first embodiment.

Alternatively, an operation table containing plating conditions in the plating layer formation process corresponding to the glossiness and grinding conditions in the grinding process corresponding to the glossiness is created, and formed in the plating layer formation process based on the measured glossiness. You may adjust the plating amount of the plating layer to be applied and the grinding amount of the surface of the plating layer to be ground in the grinding process.

Other manufacturing processes in the fifth embodiment are the same as those in the first embodiment.

Above, embodiments of the present disclosure have been described. However, the above-described embodiments are merely examples for carrying out the present disclosure. Accordingly, the present disclosure is not limited to the above-described embodiments, and may be implemented by appropriately modifying the above-described embodiments without departing from the spirit thereof.

1: Manufacturing device of plated steel sheet with texture
2: Plating device
3: Grinding device
4: First plating film thickness determination device
5: Second plating film thickness determination device
6: steel plate
7: Plated steel plate
8: Plated steel sheet with texture
9: Control unit

Claims (19)

A plating layer forming process of manufacturing a plated steel sheet by forming a plating layer on the surface of the steel sheet by electroplating or hot dip plating,
A grinding process of grinding the surface of the plating layer of the plated steel sheet to form a texture on the surface of the plating layer;
First plating film thickness information regarding the film thickness of the plating layer of the plated steel sheet after the plating layer forming process and before the grinding process, and second plating film thickness information regarding the film thickness of the plating layer of the plated steel sheet after the grinding process. A plating film thickness determination process that determines,
Based on the first and second plating film thickness information, an adjustment step of adjusting the plating amount of the plating layer formed in the plating layer forming process and the grinding amount of the surface of the plating layer ground in the grinding process,
Method for manufacturing plated steel sheet with texture. According to paragraph 1,
In the above adjustment process,
Based on the first plating film thickness information and the second plating film thickness information, grinding amount information, which is information regarding the grinding amount in the grinding process, is obtained,
Based on the second plating film thickness information and the grinding amount information, adjusting the plating amount of the plating layer formed in the plating layer forming process and the grinding amount of the surface of the plating layer ground in the grinding process.
Method for manufacturing plated steel sheet with texture. According to paragraph 2,
In the adjustment process,
When the second plating film thickness information exceeds the standard range and the grinding amount information exceeds the standard range, the plating amount of the plating layer formed in the plating layer forming process is reduced, and the plating layer ground in the grinding process is reduced. Adjusted to reduce the amount of grinding of the surface,
When the second plating film thickness information exceeds the reference range and the grinding amount information is less than the reference range, the plating amount of the plating layer formed in the plating layer forming process is maintained, and the plating amount of the plating layer ground in the grinding process is maintained. Adjust to increase the amount of grinding of the surface,
When the second plating film thickness information exceeds the standard range and the grinding amount information is within the standard range, the plating amount of the plating layer formed in the plating layer forming process is reduced, and the plating amount of the plating layer ground in the grinding process is reduced. adjust to maintain the grinding amount of the surface,
When the second plating film thickness information is less than the standard range and the grinding amount information is more than the standard range, the plating amount of the plating layer formed in the plating layer forming process is maintained, and the plating layer is ground in the grinding process. Adjusted to reduce the amount of grinding of the surface,
When the second plating film thickness information is less than the reference range and the grinding amount information is less than the reference range, the plating amount of the plating layer formed in the plating layer forming process is increased, and the plating amount of the plating layer ground in the grinding process is increased. Adjust to increase the amount of grinding of the surface,
When the second plating film thickness information is less than the standard range and the grinding amount information is within the standard range, the plating amount of the plating layer formed in the plating layer forming process is increased, and the plating amount of the plating layer ground in the grinding process is increased. adjust to maintain the grinding amount of the surface,
When the second plating film thickness information is within the standard range and the grinding amount information is greater than the standard range, the plating amount of the plating layer formed in the plating layer forming process is maintained, and the plating layer is ground in the grinding process. Adjusted to reduce the amount of grinding of the surface,
When the second plating film thickness information is within the reference range and the grinding amount information is less than the reference range, the plating amount of the plating layer formed in the plating layer forming process is maintained, and the plating amount of the plating layer ground in the grinding process is maintained. Adjust to increase the amount of grinding of the surface,
When the second plating film thickness information is within the standard range and the grinding amount information is within the standard range, the plating amount of the plating layer formed in the plating layer forming process and the surface of the plating layer ground in the grinding process Adjusting to maintain the grinding amount,
Method for manufacturing plated steel sheet with texture. According to any one of claims 1 to 3,
In the plating film thickness determination process,
Measuring the film thickness of the plating layer of the plated steel sheet after the plating layer forming process and before the grinding process, and using the measured film thickness as the first plating film thickness information,
Method for manufacturing plated steel sheet with texture. According to any one of claims 1 to 4,
In the plating film thickness determination process,
Measuring the film thickness of the plating layer of the plated steel sheet after the grinding process, and using the measured film thickness as the second plating film thickness information,
Method for manufacturing plated steel sheet with texture. According to any one of claims 1 to 5,
In the plating layer forming step, the plating layer is formed by the electroplating method,
In the plating film thickness determination process,
In the plating layer formation process, the first plating is based on the metal ion concentration in the plating solution, the sheet-through speed of the steel sheet in the plating solution, the width direction length of the steel sheet, current density, current efficiency, and/or the temperature of the plating solution. Determining film thickness information,
Method for manufacturing plated steel sheet with texture. According to any one of claims 1 to 5,
In the plating layer forming step, the plating layer is formed by the hot dip plating method,
In the plating film thickness determination process,
In the plating layer forming process, determining the first plating film thickness information based on the sheet-threading speed of the steel sheet in the plating bath, the collision pressure of the wiping gas, and/or the reduction rate in the skin pass mill,
Method for manufacturing plated steel sheet with texture. According to any one of claims 1 to 7,
Further comprising a coating film forming process of forming a coating film on the surface of the plated steel sheet after the grinding process,
Method for manufacturing plated steel sheet with texture. According to any one of claims 1 to 8,
Further comprising an appearance evaluation process of evaluating the appearance of the plated steel sheet after the grinding process by the glossiness of the surface of the plated steel sheet after the grinding process.
Method for manufacturing plated steel sheet with texture. According to clause 9,
In the appearance evaluation process,
Based on the two glossiness levels: the glossiness of the surface of the plated steel sheet measured toward the longitudinal direction of the plated steel sheet, and the glossiness of the surface of the plated steel sheet measured toward the width direction of the plated steel sheet. To evaluate the appearance of plated steel sheets,
Method for manufacturing plated steel sheet with texture. According to claim 9 or 10,
In the above adjustment process,
Based on the first plating film thickness information, the second plating film thickness information, and the glossiness of the surface of the plated steel sheet after the grinding process, the plating amount of the plating layer formed in the plating layer forming step, and the grinding Adjusting the grinding amount of the surface of the plating layer to be ground in the process,
Method for manufacturing plated steel sheet with texture. A plating device for producing a plated steel sheet by performing hot dip plating or electroplating to form a plating layer on the surface of the steel sheet;
a grinding device disposed downstream of the plating device and grinding the surface of the plating layer of the plated steel sheet to form a texture on the surface of the plating layer;
a first plating film thickness determination device that determines first plating film thickness information regarding the film thickness of the plating layer before the grinding, and outputs the first plating film thickness information;
A second plating film thickness determination device disposed downstream of the grinding device, determines second plating film thickness information regarding the film thickness of the ground plating layer, and outputs the second plating film thickness information.
Equipment for manufacturing plated steel sheets with texture. According to clause 12,
Further comprising a control device for controlling the plating device and the grinding device,
The control device is,
Based on the first plating film thickness information and the second plating film thickness information, the plating device is controlled to adjust the plating amount of the plating layer formed on the surface of the steel sheet by the plating device, and further the first plating Controlling the grinding device to adjust the grinding amount of the surface of the plating layer to be ground by the grinding device based on the film thickness information and the second plating film thickness information.
Equipment for manufacturing plated steel sheets with texture. According to clause 13,
The control device is,
Based on the first plating film thickness information and the second plating film thickness information, grinding amount information, which is information regarding the grinding amount by the grinding device, is obtained,
Based on the second plating film thickness information and the grinding amount information, the plating device is controlled to adjust the plating amount of the plating layer formed on the surface of the steel sheet by the plating device, and further the second plating film thickness Based on the information and the grinding amount information, controlling the grinding device to adjust the grinding amount of the surface of the plating layer to be ground by the grinding device,
Equipment for manufacturing plated steel sheets with texture. According to clause 14,
The control device is,
When the second plating film thickness information exceeds the standard range and the grinding amount information exceeds the standard range, the plating device is controlled to reduce the plating amount of the plating layer formed by the plating device, and the grinding Controlling the grinding device to reduce the amount of grinding of the surface of the plating layer being ground by the device,
When the second plating film thickness information exceeds the standard range and the grinding amount information is less than the standard range, the plating device is controlled to maintain the plating amount of the plating layer formed by the plating device, and further, the grinding device Controlling the grinding device to increase the grinding amount of the surface of the plating layer to be ground,
When the second plating film thickness information exceeds the standard range and the grinding amount information is within the standard range, the plating device is controlled to reduce the plating amount of the plating layer formed by the plating device, and the grinding device Controlling the grinding device to maintain the grinding amount of the surface of the plating layer being grinded,
When the second plating film thickness information is less than the standard range and the grinding amount information is more than the standard range, the plating device is controlled to maintain the plating amount of the plating layer formed by the plating device, and the grinding device Controlling the grinding device to reduce the amount of grinding of the surface of the plating layer to be ground,
When the second plating film thickness information is less than the standard range and the grinding amount information is less than the standard range, the plating device is controlled to increase the plating amount of the plating layer formed by the plating device, and the grinding device Controlling the grinding device to increase the amount of grinding of the surface of the plating layer to be ground,
When the second plating film thickness information is less than the standard range and the grinding amount information is within the standard range, the plating device is controlled to increase the plating amount of the plating layer formed by the plating device, and the grinding device Controlling the grinding device to maintain the grinding amount of the surface of the plating layer being grinded,
When the second plating film thickness information is within the standard range and the grinding amount information is beyond the standard range, the plating device is controlled to maintain the plating amount of the plating layer formed by the plating device, and the grinding device Controlling the grinding device to reduce the amount of grinding of the surface of the plating layer to be ground,
When the second plating film thickness information is within the standard range and the grinding amount information is less than the standard range, the plating device is controlled to maintain the plating amount of the plating layer formed by the plating device, and further, the grinding device Controlling the grinding device to increase the grinding amount of the surface of the plating layer to be ground,
When the second plating film thickness information is within the standard range and the grinding amount information is within the standard range, the plating device is controlled to maintain the plating amount of the plating layer formed by the plating device, and further, the grinding device Controlling the grinding device to maintain the grinding amount of the surface of the plating layer being ground,
Equipment for manufacturing plated steel sheets with texture. According to any one of claims 12 to 15,
Further comprising a coating film forming device disposed downstream of the grinding device and forming a coating film on the surface of the ground plating layer,
Equipment for manufacturing plated steel sheets with texture. According to any one of claims 12 to 16,
Further comprising one or a plurality of gloss meters disposed downstream of the grinding device and measuring the glossiness of the surface of the plated steel sheet having the ground plating layer,
Equipment for manufacturing plated steel sheets with texture. According to clause 17,
The gloss meter is,
a gloss meter that measures the gloss of the surface of the plated steel sheet in the longitudinal direction of the plated steel sheet, and a gloss meter that measures the gloss of the surface of the plated steel sheet in the width direction of the plated steel sheet. Glossy artist,
Equipment for manufacturing plated steel sheets with texture. According to claim 17 or 18,
The control device is,
Based on the first plating film thickness information, the second plating film thickness information, and the glossiness of the surface of the plated steel sheet, to adjust the plating amount of the plating layer formed on the surface of the steel sheet by the plating device. Controlling the plating device, and grinding the surface of the plating layer with the grinding device based on the first plating film thickness information, the second plating film thickness information, and the glossiness of the surface of the plated steel sheet. Controlling the grinding device to adjust the grinding amount,
Equipment for manufacturing plated steel sheets with texture.

Images