JPH04118250U - mold roll - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a mold roll that can make the surface temperature of the outer peripheral surface of the mold roll uniform. [Structure] A plurality of cooling water passages 4 are formed in the roll body 3 along the axial direction at predetermined intervals in the circumferential direction. It is formed to have a cross-sectional shape substantially parallel to the outer circumferential surface 3a, so that the heat conduction distance from any part of the outer circumferential surface 3a of the roll body 3 to the heat transfer surface 4a of the cooling water passage 4 is approximately equal.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a mold roll used in continuous casting equipment, amorphous metal manufacturing equipment, etc. In particular, it concerns the shape of the cooling water passage.

0002

[Conventional technology]

Traditionally, for example, mold rolls used in twin mold roll type continuous casting equipment In this paper, the present inventor published Japanese Patent Application Laid-Open No. 58-181452 and Japanese Patent Application Laid-open No. 58-1684. There is a proposal in Publication No. 62. This is a predetermined interval in the circumferential direction within the mold roll. A cooling water channel with a circular cross section was provided in the axial direction for each.

0003

[Problem that the idea aims to solve]

However, the cooling channel mentioned above has a circular cross section, and the heat transfer surface on the surface side is semicircular. Therefore, depending on the surface of the mold roll, the distance to the heat transfer surface of the cooling water channel may vary. Because it is uniform, the surface temperature of the outer circumferential surface of the mold roll will decrease when used for a long time. This results in non-uniformity and thermal stress. This thermal stress causes cracks to occur on the roll surface. If the impurities on the surface of the pool gather in this crack and are cast as they are, These impurities are incorporated into the surface of the slab, causing surface defects and reducing the quality of the product. This was causing the problem.

0004 This invention solves the above problems and makes the surface temperature of the mold roll uniform. The purpose is to provide mold rolls.

[0005]

[Means to solve the problem]

In order to solve the above problems, the present invention has a plurality of In a mold roll in which cooling water passages are formed at predetermined intervals in the circumferential direction, The water passage is formed in a cross-sectional shape in which the heat transfer surface on the surface side of the roll body is approximately parallel to the surface. It is.

[0006]

[Effect]

According to the above configuration, the distance between the surface of the roll body and the heat transfer surface of the cooling water passage is almost uniform. As a result, the surface of the roll body is cooled uniformly, the surface temperature is uniform, and the roll body is cooled evenly. No thermal stress occurs even after long use. Therefore, surface cracks may also occur. It is possible to produce homogeneous products without surface defects.

[0007]

【Example】

Hereinafter, one embodiment of the present invention will be described based on the drawings. In Fig. 2, reference numeral 1 denotes mold rolls arranged parallel to each other, with bearings (not shown). ) and a surface (outer peripheral surface) provided on the shaft 2. The roll main body 3 forms a slab (or amorphous metal) at 3a. In the vicinity of the surface 3a in the roll body 3, a cooling water passage 4 in the axial direction is provided in a predetermined circumferential direction. A plurality of them are formed at each interval.

[0008] As shown in detail in FIG. It is drilled at a constant pitch P at a constant distance L from a, and its cross section is The heating surface 4a is formed into a bell shape with a plane parallel to the surface 3a or a circular arc surface. did Therefore, the distance between the cooling water passage 4 and the surface 3a becomes almost uniform, allowing continuous work. Even if the surface 3a of the roll body 3 is continuously heated by Since the heat is conducted over a distance of 100 m and is absorbed by the cooling water 5 from the heat transfer surface 4a of the cooling water passage 4, , the surface temperature can be maintained uniformly without any unevenness. This implementation In the example, the radius R of the roll body 3 is 600 mm, and the surface 3a of the cooling water passage 4 is Distance L from to heat transfer surface 4a is 20 mm, pitch P of cooling water passage 4 is 40 mm, cooling water passage The width W of the passage 4 is 25 mm, and the number M of the cooling water passages 4 is 90.

As shown in FIG. 3, the cooling water passage 4 is divided into six equal angle sections, with a section A to which cooling water is supplied from one shaft section 2 and a section A from which cooling water is supplied from the other shaft section 2. The compartments B and B to which are supplied are arranged alternately. Cooling water is supplied and drained from the shaft portion 2 to each of these sections A and B, and cooling water is supplied to one end of the cooling water passage _4I on the one end side in each section A and B, and the cooling water passage on the other end side Cooling water is drained from one _end of the cooling water passage 4, and adjacent ends of the cooling water passage 4 between one end side and the other end side are communicated with each other via a communication passage 6.

[0010] When the roll main body 3 is formed in a hollow shape, as shown in FIG. A cooling water passage 4 is formed within the cylinder 12 . In the hollow part 14 inside the end plate 13, a connecting pipe 17 is connected between the cooling water supply hole 15 formed in the shaft part 2 and the one end side cooling water passage _4I to communicate with each other, and the drain hole 16 A connecting pipe 17 is connected between the cooling water passage 4 O on the other end side and the cooling water passage 4 _O on the other end side to communicate with each other. Further, a U-shaped pipe 19 forming a communication passage 6 is connected between the ends of the other cooling water passages 4 . 20 is a closing plate that closes the end of the cooling water passage 4.

When the roll body 3 is solid and integrally formed with the shaft portion 2, as shown in FIG. A water supply hole 22 and a drainage hole 23 formed in the shaft portion 2 are opened respectively, and the cooling water passage 4 _I on the one end side or the other end is connected through the connecting pipes 24 and 25 arranged in the ring-shaped recess 21. The side cooling water passages 4 _O are connected to each other. Further, a U-shaped pipe 26 forming a communication passage 6 is connected between the ends of the other cooling water passages 4 . 2 7 is a closing plate that closes the end of the cooling water passage 4 , and 28 is a recess closing plate that closes the opening surface of the ring-shaped recess 21 .

0012 Figure 6 shows another embodiment of the cooling water passage, whose cross section is shown by superimposing three circular passages. It was formed at the same time. That is, this cooling water passage 34 is a large diameter main passage. 34b, and two sub passages 32c formed on the surface 3a side of this main passage 31b. The heat transfer surface 31a on the surface 3a side of the roll body 3 is formed into a substantially bell shape. It is formed almost parallel to. Therefore, it is possible to obtain the same effect as in the above embodiment. In addition, the cooling water passage 34 has a shape of three overlapping circular passages. This makes machining the cooling water passage 34 extremely easy.

[0013]

[Effect of the idea]

As described above, according to the present invention, the surface of the roll body and the heat transfer surface of the cooling water passage Since the heat conduction distance between the roll body and the The surface temperature becomes uniform and no thermal stress occurs. Therefore, surface cracks also occur. It is possible to produce homogeneous products without surface defects.

[Brief explanation of drawings]

FIG. 1 is an enlarged cross-sectional view showing a cooling water passage of an embodiment of a mold roll according to the present invention.

FIG. 2 is a schematic perspective view illustrating the mold roll.

FIG. 3 is a schematic cross-sectional view illustrating the mold roll.

FIG. 4 is a partial vertical cross-sectional view of the hollow mold roll.

FIG. 5 is a partial vertical cross-sectional view of the solid mold roll.

FIG. 6 is an enlarged cross-sectional view showing a cooling water passage in another embodiment.

[Explanation of symbols]

1 mold roll 2 Shaft part 3 Roll body 3a Surface (outer surface) 4,34 Cooling water passage 4a,34a Heat transfer surface 5 Cooling water 6 Connecting passage

Claims (1)

[Scope of utility model registration request] 1. A mold roll in which a plurality of cooling water passages are formed at predetermined intervals in the circumferential direction along the axial direction in the roll body, wherein the cooling water passages are formed so that the heat transfer surface on the surface side of the roll body is formed with the surface. A mold roll characterized by being formed into a substantially parallel cross-sectional shape.