JP3139404B2 - Method and apparatus for manufacturing embossed steel sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method and an apparatus for producing an embossed steel sheet, and more particularly to a method and an apparatus for producing an embossed steel sheet capable of adjusting the surface gloss of the steel sheet.

[0002]

2. Description of the Related Art In an embossed steel sheet, there are various demands by consumers for not only the type of embossed pattern but also the surface gloss.

As for the embossed pattern, a work roll provided with a corresponding embossed pattern is selected from a group of embossed work rolls and used. For the surface gloss, selection of a work roll with an embossed pattern suitable for the polishing count from the group of embossed work rolls, or a work roll for rolling before embossing is performed with the work roll with an embossed pattern, suitable for this work roll group for rolling. This is handled by selecting a work roll for rolling with a polishing count.

[0004]

However, in such a conventional method, it is necessary to prepare a large number of work rolls having different polishing numbers in order to meet the demands of the customer, and to prepare the work rolls in accordance with the demands of the customer. It is necessary to change rolls frequently. Furthermore, even if the work rolls are of the same polishing count, the surface roughness changes due to wear due to long-term use. It is necessary to change roles.

[0005] These factors cause a reduction in the basic unit of the work roll, leading to an increase in manufacturing cost and deterioration in workability.

The techniques relating to the embossed steel plate disclosed in Japanese Patent Application Laid-Open Nos. 56-62601 and 7-115045 relate to controlling the depth of unevenness of the embossed pattern and preventing warpage of the embossed steel plate, respectively. This is not a technique relating to the adjustment of the surface gloss as in the present invention.

Accordingly, a main object of the present invention is to meet the demands of customers by reducing the frequency of replacing work rolls as much as possible and by using the same embossed work rolls to give an elongation to an embossed steel sheet. Surface gloss can be obtained, thereby increasing the basic unit of work roll,
An object of the present invention is to reduce manufacturing costs and improve workability.

[0008]

According to a first aspect of the present invention, there is provided a steel sheet rolled by an embossed work roll and embossed.
Thereafter, a bright annealing treatment is performed, and then a predetermined elongation is given to the steel sheet to obtain a desired surface gloss.

According to a second aspect of the present invention, there is provided means for rolling a steel sheet with an embossed work roll and applying embossing, means for performing a bright annealing treatment on the steel sheet, And elongation imparting means for imparting the desired surface gloss in this order, wherein the elongation imparting means is selected from the group consisting of a leveler facility, a tension bridle roll facility, and a temper rolling facility. This is a manufacturing device for embossed steel sheets.

According to the present invention, when a given elongation is given after the bright annealing treatment of an embossed steel sheet, the grain boundaries of the surface layer of the steel sheet are unevenly stretched, the grain boundary width is expanded, and the grain boundaries themselves are expanded. It utilizes a phenomenon in which irregular irregularities occur and the gloss of the steel sheet surface decreases.

According to the present invention, by giving elongation to a steel sheet, it is possible to obtain a white shiny embossed stainless steel sheet after the bright annealing treatment and a steel sheet having a surface gloss corresponding to the elongation rate. The resulting steel sheet shows calm luster with excellent antiglare properties.

When the elongation of the steel sheet is given, by selecting the elongation rate given to the steel sheet, since the elongation rate and the surface gloss have a linear relationship shown in FIG.
The desired surface gloss (surface gloss required by the consumer) can be adjusted, and thus, a steel sheet having a different surface gloss can be manufactured by the single work roll (without changing the work roll). Further, the ability to adjust the surface gloss when flattening a steel sheet by a leveler, for example, means that the steel sheet can be manufactured without adding additional equipment.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in more detail. The advantages of the present invention are particularly prominent when stainless steel embossed steel sheets used for building materials, kitchen materials, exterior materials, and the like are obtained. Therefore, SUS304 will be described below as an example.

First, a steel sheet is rolled by a work roll having an embossed pattern, and embossing is performed. In this case, the polishing number of the work roll surface may be arbitrary. After embossing, a known bright annealing treatment is performed. After performing the bright annealing treatment, the steel sheet is given a predetermined elongation to obtain a desired surface gloss.

As elongation imparting means for imparting a predetermined elongation to a steel sheet and obtaining a desired surface gloss, there are leveler equipment,
Tension bridle roll equipment, temper rolling equipment and the like can be mentioned.

For example, a tension leveler 1 shown in FIG. 1 is used. This is the extension leveler work roll 2
A, 2A, etc., and a straightening leveler 3, which is arranged downstream of the stretching leveler 3A, 3A, etc., and bridle rolls 4, 4 are provided upstream and downstream of the tension leveler 1. Are located.
The steel sheet M is given a predetermined elongation rate by the extension leveler 2 and the straightening leveler 3. The elongation rate given to the steel sheet M is adjusted by the amount of reduction of the elongation leveler 2 and the straightening leveler 3 or the tension by the bridle rolls 4 and 4. Further, as shown in FIG. 1, a temper rolling facility 5 is provided upstream of the upstream bridle roll 4, and adjustment is performed by providing a tension difference between the bridle roll 4 and the temper rolling facility 5. Can also.

It is preferable that the elongation in the present invention is at most 2%. If the elongation is extremely high,
This is because the flatness of the steel sheet is adversely affected.

In the present invention, in addition to the tension leveler, in addition to a leveler such as a stretcher leveler or a roller leveler, a tension applying means using a tension bridle roll, and a temper, as means for giving a predetermined elongation rate to the steel sheet. A rolling mill or the like can also be used.

FIG. 3 shows a schematic view of the crystal grains of the surface layer of the embossed steel sheet subjected to the bright annealing treatment under a microscope. On the other hand, in the steel sheet given a predetermined elongation rate (strain) by the elongation imparting means, as shown in FIG. 4, the crystal grain boundaries of the surface layer of the steel sheet are unevenly stretched and the grain boundary width is expanded, In addition, irregular irregularities occur in the crystal grains themselves, and the gloss of the steel sheet surface is reduced.

[Experimental Example] Embossed steel plate (test material: SU
S304, plate thickness: 0.8 mm, plate width: 3 width), and after performing a bright annealing treatment, a tension leveler similar to that shown in FIG. The relationship between the elongation rate by the tension leveler and the surface gloss was examined by measuring the surface gloss as a ratio (GS20 °) to the light flux reflected from the glass surface at an incident angle of 20 ° specified in JIS. As a result, as shown in FIG. 2, the surface gloss decreased from about 360 to 180 as the elongation increased. As is apparent from the results, it is possible to adjust the surface gloss by selecting the elongation.

Also, the surface gloss can be adjusted by changing the elongation rate by using a leveler such as a stretcher leveler or a roller leveler, applying tension using a bridle roll, applying tension using a temper rolling mill, or the like. confirmed.

[0022]

According to the present invention, the frequency of replacing work rolls is reduced as much as possible, and while using the same work roll with an embossed pattern, elongation is given to the embossed steel plate, so that the surface can meet the demands of customers. Gloss can be obtained,
Accordingly, the basic unit of the work roll can be increased, the production cost can be reduced, and the workability can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic view of a tension leveler.

FIG. 2 is a graph showing the relationship between elongation and surface gloss.

FIG. 3 is a schematic diagram of crystal grains on the surface layer of a steel sheet after bright annealing and before applying strain.

FIG. 4 is a schematic diagram of crystal grains of a surface layer after strain is applied.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... tension leveler, 2 ... extension leveler, 2A ... extension leveler work roll, 3 ... straightening leveler, 3A ... straightening leveler work roll, 4 ... bridle roll, M ...
steel sheet.

Continuation of the front page (56) References JP-A-6-63603 (JP, A) JP-A-2-274860 (JP, A) JP-A-6-71302 (JP, A) JP-A-62-6703 (JP) JP-A-61-276702 (JP, A) JP-A-61-56703 (JP, A) JP-B-7-90247 (JP, B2) JP-B-7-115045 (JP, B2) (58) Field surveyed (Int. Cl. ⁷ , DB name) B21B 1/00-11/00 B21H C21D 1/76, 9/52

Claims (2)

(57) [Claims] 1. A steel sheet is rolled by an embossed work roll, embossed, and then subjected to bright annealing treatment to give a predetermined elongation to the steel sheet to obtain a desired surface gloss. A method for producing an embossed steel sheet, characterized by obtaining 2. A means for rolling a steel sheet by an embossed work roll and embossing, a means for bright annealing the steel sheet, and a method for imparting a predetermined elongation to the obtained steel sheet. An elongation imparting means for obtaining a target surface gloss, in this order, the elongation imparting means, the embossed steel plate characterized by being selected from the group of leveler equipment, tension bridle roll equipment, and temper rolling equipment manufacturing device.