JPH0687023A - Take-up machine for strip - Google Patents

Abstract

PURPOSE:To prevent a heat insulating layer from being deteriorated and improve the maintenance by covering the outer surface of an inner layer segment body with the heat insulating layer and integrally forming them. CONSTITUTION:The mandrel 1 of a take-up machine for a strip is constituted by connecting with an inner mechanism so that plural segments 4 can be expanded and contracted in the radial direction. Then, the segments 4 are divided into the outer layer part and an inner layer segment body in the peripheral direction and the outer surface of the inner layer segment body is covered with a heat insulating layer to form them integrally. A sliding part between a slide rod 5 constituting an expanding and contracting mechanism and a wedge shaft 3 does not generate sezure by deterioration of grease coated between a slide rod and a hollow shaft and the mandrel 1 can be expanded and contracted without fail. In this way, occurrence of damage, etc., of the segment itself can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a winding machine for winding a strip in a high temperature state such as a hot strip rolling equipment or a thin wall continuous casting equipment.

[0002]

2. Description of the Related Art Conventionally, a mandrel having a wedge type expansion / contraction mechanism has been used as a hot strip winding device. The hot strip after processing such as rolling is supplied to this mandrel at a high temperature, and the hot strip is wound around a segment provided around the mandrel.

However, when a hot strip is wound by using this type of winding device, the sliding portion between the slide rod and the wedge shaft constituting the expansion / contraction mechanism by the heat input from the hot strip or the slide rod and the hollow portion. In some cases, the mandrel cannot be expanded or contracted due to seizure caused by deterioration of the grease applied between the shaft and the shaft.

When winding the hot strip,
The outer peripheral side of the segment is heated by the hot strip, and at the same time, the inner peripheral side of the segment is removed by heat transfer to the internal mechanism side of the mandrel. In this way, the segment has a temperature distribution in which the temperature on the surface side is higher than that on the inner peripheral side, and as a result, warpage is likely to occur in the thickness direction. If the segment is warped, it has an effect such that it hinders the tightening of the coil of the hot strip being wound, or the segment itself is damaged.

In order to eliminate such troubles, various structures have been conventionally developed. For example, in Japanese Unexamined Patent Publication No. 61-17326, a pressing piece fitted with a heat insulating material is inserted between a segment and a slide rod incorporated as a member for moving the segment in the radial direction, so that the inside of the mandrel is inserted from the segment. A structure for suppressing heat removal to the slide rod is disclosed. And
In this device, by covering the surface of the hollow shaft with a heat insulating material and incorporating a water cooling pipe, it is possible to suppress heat radiation from the segment to the hollow shaft and prevent the temperature rise of the hollow shaft.

Further, JP-A-56-47211, JP-A-56-47212, JP-A-56-47215.
The publication describes that a heat transfer sleeve is fitted around the outer circumference of the segment to suppress heat transfer from the hot strip to the segment.

Further, in Japanese Patent Laid-Open No. 56-62618, a large number of support materials are provided outside the segment at intervals, and an outer layer having a shape along the outer surface of the mandrel is placed and fixed on the support material. An air layer is provided between the outer layer and the outer surface of the mandrel to suppress heat transfer from the hot strip to the segment.

Further, Japanese Patent Application Laid-Open No. 56-95416 proposes that when the hot strip is wound, the hot strip and the heat insulating material are co-wound to suppress heat conduction to the mandrel.

[0009]

Although various measures have been taken to prevent the seizure of the sliding portion and the warp of the segment due to the heat input from the hot strip, various measures have been taken. There are still many aspects that cannot be said to have sufficient functions or effects.

For example, Japanese Unexamined Patent Application Publication No. Sho 6-96 mentioned in the section of the prior art.
According to the publication No. 1-17326, it is necessary to transmit the winding force of the strip to the wedge shaft for moving the segment in the radial direction, so that the entire pressing piece between the segment and the slide rod is covered with a heat insulating material. I can't. For this reason, there is no change in that the heat transfer surfaces of the metal members intervene from the segment toward the internal mechanism side of the mandrel, and there is a tendency that heat insulation or heat removal suppression from the segment toward the slide rod is insufficient. It is in. Further, not only the equipment cost is increased because the water cooling pipe is provided, but there are also many problems in maintenance.

Further, JP-A-56-47211, JP-A-56-47212 and JP-A-56-47215.
In the one disclosed in the publication, a complicated work of attaching and detaching a heat insulating sleeve provided around the segment for each coil of the hot strip to be wound is required. For this reason, not only the work load is increased, but also it is necessary to prepare a plurality of sleeves, and therefore an obstacle in terms of equipment cost cannot be ignored.

Further, in the one disclosed in Japanese Patent Laid-Open No. 56-62618, a support material between the segment and the outer layer transmits the tightening force of the strip, and a heat insulating material is used as the support material. Therefore, there is no change in the fact that the heat transfer surfaces of the metal members intervene from the segment toward the internal mechanism side of the mandrel, and heat insulation or heat removal suppression from the segment toward the slide rod is insufficient. There is a tendency. Further, there is a problem that the support material itself is severely worn by the transmission of the strip winding force, and cannot be used for a long period of time. Furthermore, since it is necessary to fix a large number of supporting materials between the segment and the outer layer, not only the mechanical structure is complicated and the equipment cost is high, but also there are many maintenance problems.

Further, in the case where the hot strip and the heat insulating material are co-wound as described in JP-A-56-95416, it is necessary to remove the heat insulating material when the coil is rewound, which complicates the work. This hinders the improvement of productivity.

As described above, in any of the technologies, sufficient insulation of the segment is not achieved,
Therefore, the problem of obstacles due to the warp deformation of the segments has not been solved yet.

The problem to be solved in the present invention is that the heat transfer from the segment to the internal structure can be suppressed without complicating the mandrel structure, the warp deformation of the segment is surely prevented, and the hot strip winding is performed for a long time. The purpose is to provide a structure that can withstand harvesting.

[0016]

SUMMARY OF THE INVENTION The present invention is a strip winder having a mandrel in which a plurality of segments are connected to an internal mechanism such that the segments can be expanded and contracted in a radial direction, and the segments are circumferentially arranged with an outer layer portion. It is characterized in that it is divided into inner layer segment bodies, and an outer surface of the inner layer segment bodies is integrally coated with a heat insulating layer.

[0017]

[Function] When the outer layer segment is heated by the hot strip, the segment is circumferentially divided into the outer layer portion and the inner layer segment body, and the outer surface of the inner layer segment body is integrally molded with the heat insulating layer. The heat transfer to the inner segment body is suppressed by the heat insulating layer. Therefore, the outer layer segment can be maintained in a high temperature uniform temperature distribution, and the inner layer segment body can be maintained in a low temperature uniform temperature distribution. As a result, heat transfer from the inner layer segment body to the internal mechanism side of the mandrel is suppressed, and the grease applied between the slide rod and the wedge shaft that form the expansion / contraction mechanism and between the slide rod and the hollow shaft is reduced. It is possible to operate without causing seizure due to deterioration and without making it impossible to expand or contract the mandrel. Further, since the generation of the temperature gradient in the thickness direction of the outer layer segment and the inner layer segment main body is suppressed, the warp deformation of the segment is prevented.

Since the heat insulation layer is integrally formed on the outer surface of the inner layer segment body, it is extremely excellent in preventing deterioration of the heat insulation layer and improving maintainability, as compared with the method of simply sandwiching the heat insulation material.

[0019]

1 is a longitudinal sectional view of a mandrel of a winding device, and FIG. 2 is a longitudinal sectional view taken along a plane orthogonal to the axis of the mandrel. The mandrel 1 is a segment type that has been conventionally used, and a wedge shaft 3 is inserted into a hollow shaft 2 so as to be movable in the axial direction thereof. Four segments 4 are arranged on the outer circumference of the mandrel 1, and the inner circumference side of each is connected to the hollow shaft 2 so that they can be moved in the radial direction.

The wedge shaft 3 has a wedge surface 3a on its peripheral surface.
Are arranged, and the radial position of each segment 4 is set by utilizing the movement in the axial direction and the inclination of the wedge surface 3a. Such a radial movement of the segment 4 is performed via a slide rod 5 incorporated between the wedge shaft 3 and the segment 4, and the slide rod 5 changes its position in the radial direction by the movement of the wedge surface 3a. The position of segment 4 is determined by.

Each segment 4 makes direct or indirect contact with each of the slide rod 5, the wedge shaft 3 and the hollow shaft 2 which are connected to the inner peripheral side thereof, and when the hot strip is wound on the segment 4, these segments are connected to these members. Heat transfer occurs. The segment 4 itself is provided with a heat insulating structure for suppressing such heat transfer and making the temperature distribution in the thickness direction of the segment 4 uniform.

FIG. 3 is a perspective view of an essential part showing an example of the heat insulating structure of the segment 4. The segment 4 is divided into an outer layer segment 6 part and an inner layer segment body 7 in the circumferential direction, and an outer surface of the inner layer segment body 7 is integrally molded with a heat insulating layer 8 by thermal spraying or chemical treatment. This heat insulation layer 8
Is preferably integrally formed by coating ceramics such as alumina and zirconia by thermal spraying, etc., and is significantly superior in preventing deterioration of the heat insulating layer 8 and improving maintainability, as compared with a method of simply sandwiching a heat insulating material by the single molding. ing.

With this structure, even if the outer layer segment 6 is heated by the hot strip when the hot strip is wound, the heat transfer from the outer layer segment 6 to the inner layer segment body 7 is small due to the presence of the heat insulating layer 8. . Therefore, the inner layer segment body is maintained at a low temperature, and no temperature gradient occurs in the thickness direction. Therefore, the warp of the inner layer segment body 7 is suppressed.

Further, the outer layer segment 6 has a uniform temperature distribution at high temperature, and no temperature gradient occurs in the thickness direction. Therefore, the warp of the outer layer segment 6 can be suppressed. Furthermore, since the inner layer segment body 7 is maintained at a low temperature,
There is no heat conduction from the inner layer segment body 7 to the internal mechanism side of the mandrel 1, and the slide rod 5 constituting the expansion / contraction mechanism.
The mandrel 1 can be operated without causing expansion and contraction of the mandrel 1 without causing seizure due to deterioration of grease applied between the sliding shaft 5 and the wedge shaft 3 or between the slide rod 5 and the hollow shaft 2. .

Further, since the heat insulating layer 8 is formed integrally with the inner layer segment body 7 on the outer surface of the inner layer segment body 7 without fixing a large number of supporting materials between the outer layer segment 6 and the inner layer segment body 7. It has the advantages of simple mechanical structure, low cost, and easy maintenance.

[0026]

According to the present invention, when the hot strip is wound, the outer layer segment has a uniform temperature distribution at a high temperature, and the inner layer segment body can be prevented from having a large temperature gradient in the thickness direction at a low temperature. Operation can be performed without causing seizure due to deterioration of grease applied between the slide rod and wedge shaft or between the slide rod and hollow shaft, and the mandrel cannot be expanded or contracted. it can. Further, since the warp deformation of the segment is prevented, the coil can be wound tightly and the segment itself is not damaged. Further, since the heat insulating layer is formed integrally with the outer surface of the inner layer segment body by coating, the heat insulating layer is extremely excellent in preventing deterioration of the heat insulating layer and improving maintainability as compared with a method of simply sandwiching the heat insulating material.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of a mandrel of a winding device of the present invention.

2 is a cross-sectional view of the mandrel of FIG.

FIG. 3 is a perspective view of a main part showing an example in which a heat insulating layer is formed on the outer surface of the inner layer segment main body by integral molding.

[Explanation of symbols]

 1 Mandrel 2 Hollow shaft 3 Wedge shaft 4 Segment 5 Slide rod 6 Outer layer segment 7 Inner layer segment 8 Insulation layer 9 Mounting bolt

Claims (1)

[Claims] 1. A winder for a strip having a mandrel connected to an internal mechanism so as to be capable of expanding and contracting a plurality of segments in a radial direction, wherein the segment is circumferentially divided into an outer layer portion and an inner layer segment body. A winder for a strip, wherein the outer surface of the inner layer segment body is integrally molded with a heat insulating layer.