JP3110200B2 - Composite Looper Roll for Conveying Steel Plate - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite looper roll for transporting a steel sheet.

[0002]

2. Description of the Related Art Conventionally, as a looper roll for transporting a steel sheet, a hard chrome plating or a rubber lining roll or the like is used on the surface of an iron roll tube (actually 2-1140).
No. 7). Due to its installation function, the looper roll requires rapid acceleration and deceleration of the rotation speed of the roll, and the tension of the steel plate is high, so that the load condition on the roll is high.

[0003] Iron rolls are heavy in weight and, therefore, have a high rotational inertia, so that relative slippage between the rolls and the conveyed steel sheet is liable to occur, scratches are generated on the steel sheet surface, the roll surface is roughened quickly, and the roll life is short. There were many problems such as short.

[0004] In this iron roll, in order to prevent relative slippage between the roll and the steel plate, to prevent the surface of the steel plate from being scratched and to prevent the roll surface from being scratched, the surface is subjected to hard chrome plating with an appropriate roughness, and the friction coefficient is increased. In recent years, there has been an attempt to forcibly control the rotation of the roll by installing a motor in order to prevent the occurrence of scratches on the surface of the product steel sheet due to the high inertia of the roll. However, there are many problems in the controllability, the facility installation cost is high, and there are many problems in maintenance management.

[0005]

As described above, the conventional roll made of iron has a heavy pipe weight, and therefore has a high rotational moment of inertia, so that the product (steel plate) is easily scratched, and the life of the roll is long. Was also short-lived. An object of the present invention is to use a lightweight, low-inertia, fiber-reinforced plastic roll that easily follows the conveyance speed of a steel sheet, rotates, has an appropriate surface roughness (2S to 20S), and has a high hardness. The purpose of the present invention is to provide a looper roll having a long life by applying a hard chrome plating having abrasion resistance to the outermost layer, thereby increasing the friction coefficient between the roll and the steel plate to prevent slippage and having a long life.

[0006]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and its gist is to convey a steel sheet having a fiber-reinforced composite tube made of conductive fibers. In the looper roll, the fiber-reinforced composite tube has a copper plating layer on a surface layer portion thereof, and the surface roughness of the copper plating layer has a roughness processed to 2S to 25S. A composite material looper roll for conveying a steel sheet, comprising a hard chromium plating layer having a surface roughness of 2S to 20S on a surface layer.

Hereinafter, the present invention will be described in detail. FIG. 1 is an overall sectional view of an embodiment of a fiber-reinforced composite looper roll according to the present invention. 1 is a tube made of fiber reinforced composite material,
2 is a copper plated layer, 3 is a hard chromium plated layer, 4 is a metal fitting for an internal bearing made of cylindrical steel, 5 is a connecting pin for improving the reliability of joining of the tube and the bearing metal, 6 is a rib, Reference numeral 7 denotes a steel boss, reference numeral 8 denotes a journal, and reference numeral 9 denotes a shaft for connecting metal fittings at both ends provided for the purpose of increasing the reliability of joining between the tube and the bearing hardware. FIG. 2 is an overall cross-sectional view of the fiber-reinforced composite looper roll tube, and FIG. 3 is a schematic diagram of the surface condition (surface roughness of about 2S to 25S) after shot blasting after copper plating of the tube. In order to maintain the surface roughness of the chromium plating layer 3 at an appropriate level, the surface of the copper plating layer 2 having a relatively low hardness and easily processed by shot blasting or the like is subjected to roughness adjustment processing. The appropriate surface roughness can be specified as 2S to 25S, which is slightly rougher than the surface roughness of the hard chromium plating layer. FIG. 4 is a schematic partial cross-sectional view of the tube after hard chrome plating.

[0008]

In order to apply copper plating or hard chrome plating on the surface of the composite roll, the tube must be conductive. Therefore, a conductive material (such as carbon fiber) is used as the reinforcing fiber of the composite material. Also, the surface roughness of the hard chrome plating is such that if the surface is too smooth, the friction coefficient of the roll surface is reduced and slippage with the conveyed steel sheet is liable to occur, and if the surface roughness is too rough, the surface is easily scratched, Changes in properties due to wear and the like are likely to cause problems. Therefore, the appropriate surface roughness can be specified in the range of 2S to 20S.

[0009]

[Example] Outer diameter about 400mm, thickness about 15mm, length 158
A carbon fiber reinforced plastic tube using a pitch-based carbon fiber as a reinforcing fiber of 0 mm and an epoxy resin as an impregnating resin is manufactured, and a structure in which a journal shaft of a roll is joined and held at both ends of the tube. Hold the metal annular body into the end of the composite tubular body by press-fitting it inside, and then drive a pin for connecting and fixing the annular body and the tubular body at equal circumferential intervals, and cut and grind the outer diameter part. Finish to an outer diameter of 398 mm and a thickness of 14 mm, apply copper plating of about 1 mm thickness to the outer surface, and further apply shot blasting (surface roughness of about 15 S) to the surface to make the surface roughness moderately rough. By applying hard chromium plating, the surface roughness is moderately roughened to a pear-skin shape (about 12S), and a slippery carbon fiber reinforced plastic looper roll with an appropriate coefficient of friction against steel plates It was used in the actual machine to complete. The results of its use have demonstrated its effects and a significant extension of its life.

[0010]

According to the present invention, the rotational moment of inertia of the looper roll is about 1/3 to 1/5 that of a conventional iron roll.
It can be reduced to a certain degree, and the friction coefficient of the surface can be appropriately secured. Therefore, the relative slippage between the transported steel sheet and the roll can be reduced drastically because it can easily follow rapid acceleration and deceleration of the rotation speed, preventing the occurrence of scratches on both the steel sheet and the roll surface, and extending the life due to the roll surface roughness. It was demonstrated that the effect of extending the life was extremely large.

[Brief description of the drawings]

FIG. 1 is an overall assembly sectional view of a fiber-reinforced composite looper roll according to an embodiment of the present invention.

FIG. 2 is a partially enlarged sectional view of a tube of a looper roll made of a fiber-reinforced composite material.

FIG. 3 is a partially enlarged cross-sectional view of a tubular portion of a fiber-reinforced composite looper roll.

FIG. 4 is a schematic partial cross-sectional view of a tube after hard chrome plating.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tube made of fiber-reinforced composite material 2 Copper plating layer 3 Hard chrome plating layer 4 Interpolation fitting joint part made of cylindrical steel 5 Connecting pin 6 Rib 7 Steel boss 8 Journal 9 Both ends metal connection shaft

Claims (1)

(57) [Claims] The present invention relates to a looper roll for transporting a steel sheet having a fiber reinforced composite tube made of conductive fibers, wherein the fiber reinforced composite tube has a copper plating layer on a surface layer thereof, and A composite material for conveying steel sheets, characterized by having a surface roughness of 2S to 25S and a hard chromium plating layer having a surface roughness of 2S to 20S on the surface of the copper plating layer. Looper roll.