JPS59127909A - Set up roll and its manufacture - Google Patents

Abstract

PURPOSE:To obtain a tough roll at low cost with easy manufacturing means and construction, by forming caliber-shaped composite sleeves, each of which consists of inner and outer layers, into plural set up in one body in a rolling roll to be formed by setting up a roll shaft and the sleeves in one body. CONSTITUTION:An arbor 2 i.e. a roll shaft and plural, e.g. two caliber-shaped composite sleeves 1, 1 are manufactured separately. The sleeve 1 is a composite sleeve obtained by forming an outer layer 1a formed with wear-resisting material and an inner layer 1b formed with a meterial different from said material, in one body at a joining boundary C slanting with respect to the axial line of sleeve. A fitting hole 4 is provided to the composite sleeve for fitting it to the arbor 2 along the axial line of sleeve, and two sleeves 1 are joined in one body on the arbor 2 so that the outer layers 1a of them are joined together in V- shape. Thus a V-shaped caliber part 3 covered perfectly with the wear-resisting material is easily obtained, and the quantity of the material consumed is reduced to the necessary minimum, and a roll having high strength in the whole is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a new roll used for shape rolling, etc., and a means for manufacturing the same.

As is well known, in order to improve the wear resistance of the part of a rolling roll that comes into contact with the rolled material, it is common practice to use a highly hard wear-resistant material only in that part. Rolls for rolling small-sized steel sections have a caliber shape that matches the shape of the target steel section, so conventionally two methods have been used to arrange wear-resistant materials on the caliber-shaped surface. . For example, when the roll has a recessed part of the chevron-shaped caliber on the circumferential surface, one of them is to form a wear-resistant material layer with a predetermined thickness on the roll inner layer from the circumferential surface along the part of the chevron-shaped caliber. The other method is to form a wear-resistant material layer as an outer layer on the inner layer of the roll regardless of the potassium content, and to form part of the potash afterwards. The former method can be manufactured using a special caliber casting method or hollow casting method, but this method requires relatively advanced manufacturing technology and has the drawback of being expensive. This method is easy to manufacture because it is sufficient to manufacture and form a composite roll with two layers, the inner and outer layers, and then form a part of the caliber afterward. A roll structure in which the wear-resistant material layer is excessively thick has a disadvantage in that the overall strength required as a rolling roll is reduced.

The present invention solves these problems and provides a roll in which a necessary wear-resistant material layer is placed on a portion of the caliber using relatively easy manufacturing means. , an assembled roll used for rolling section steel, etc., in which a roll shaft body and a plurality of sleeve groups having a caliber shape are manufactured separately and assembled together, and the sleeve group is All of these sleeves are composite sleeves with both inner and outer layers whose joint boundaries are inclined with respect to the sleeve axis, and each sleeve is connected in series in the axial direction.

In manufacturing the assembled roll, after separately manufacturing a plurality of sleeve groups each having a roll shaft body and a caliber shape,
While assembling the sleeve as one piece, the outer layer and the inner layer are sequentially formed by vertical centrifugal casting means.

Further, by adjusting the centrifugal force, a composite sleeve can be formed by casting with the joining boundary between the inner and outer layers set at an arbitrary inclination angle with respect to the sleeve axis.

The present invention will be described in detail below with reference to the embodiments shown in the drawings. The examples shown in FIGS. An example is shown, but if the roll shaft body is -a
A composite sleeve surface consisting of an inner layer (141) and an outer layer (141) is assembled together on η to form a rolling roll, and the sleeve (2) is filled with potassium in a predetermined position to match the shape of the steel section to be obtained. The part (2) is formed as a V-shape in the illustrated example.At this time, the outer layer f141, in which the potash in contact with the rolled material partially contains αG, is made of a wear-resistant material that is harder than the inner layer material. At this time, as illustrated in Fig. 9, an outer layer 14) made of a wear-resistant material is integrally formed on the inner layer (14) to a predetermined thickness along the shape of the part (1). As illustrated in Fig. 1θ, an outer layer (141) is integrally formed with a constant thickness on the inner layer aj, and afterward, some potash is added to the outer layer ti4 surface. As is known, these composite sleeves (c) have a structure in which the inner and outer layers are integrally formed by casting, but the method shown in Fig. 9 involves the casting of Potash requires a relatively advanced casting method such as casting process or hollow casting method, which increases the casting cost. This has the disadvantage that the outer layer (141) made of an expensive wear-resistant material becomes thicker than necessary, and it has to be used in unnecessary areas, reducing the roll strength. also shows the junction boundary between the inner and outer layers.

In contrast, the present invention provides an assembled roll as illustrated in FIGS. 1 to 6. That is, the examples shown in FIGS. 1 to 4 correspond to the conventional example shown in FIG. By assembling the composite sleeve (1) (11) into one body, the recessed V-shaped caliber portion (3) is formed of a required wear-resistant material. As shown in Fig. 3.4, such a composite sleeve (1) has both inner and outer layers of an inner layer (1b) and an outer layer (la) made of different materials integrated by a joint boundary tc+ that is inclined with respect to the sleeve axis. As shown in the figure, the outer layer (1a) formed of the necessary high-hardness wear-resistant material is wrapped around the negative side of the composite ring (1) with a substantially truncated conical cross-sectional shape. A fitting hole [4] to the aperture (2) is provided along the sleeve axis of this composite sleeve (1), and the outer layer (la
) (la) are joined to each other in a V shape.
), it is easy to obtain a V-shaped caliber part (3) completely covered by the wear-resistant material, and the amount of wear-resistant material used is necessary. It is possible to get by with a sufficient minimum amount. In this case, machining such as cutting is not required at all to form the caliber part (3), apart from surface finishing.

Horse 7 Of course, the shape of the V-shaped caliber portion (3) as described above varies depending on the shape of the steel section, but in the present invention, as illustrated in FIG. 6, both the inner and outer layers ( 1a
It is possible to freely change the shape by adjusting and changing the inclination angle of the joining boundary (C) of M1b) with respect to the sleeve axis. That is, as shown in the figure on the left side of Fig. 6, each joint boundary (C1) in the two composite sleeves (1) (1) (if the inclination angle of C1 with respect to the sleeve axis is equal, it is 90 degrees or A V-shaped caliber part (3) with equal left and right rolling surfaces of 120 degrees is obtained, and one composite sleeve (1) is obtained as shown in the right side of Figure 6. Inner and outer layers N(1a)(1
Different inclination angles α with respect to the sleeve axis, where the joint boundary (CI) in b) is gently inclined, and the joint boundary (C8) in both the inner and outer layers (LA) (1'N) in the other composite sleeve (1) is steeply inclined. , β, the shape of the recessed caliper part (3) is freely adjusted so that the deformed V-shaped potash due to the wide rolling surface and the narrow rolling surface can be obtained in part (5a), and This allows for a wide range of rolling contents.

Furthermore, according to the present invention, it can be easily implemented for rolling purposes that require not only one caliber part as in the example shown in FIG. 1, but also a large number of caliber parts. That is, as an example is shown in FIG. 0-6), and by integrating the outer layers (la) and (la) of two adjacent sleeves by arranging them in series in a joined manner, the same arc can be -( 2) The number of bearings of the composite sleeve (1) (1) may be increased or decreased depending on the number of caliber parts (1), so that a rolling roll having three caliber parts (3) on the top is obtained. In this example, the shapes of the six forces jl A part (3) are the same, but as mentioned earlier, the joint boundary (C)
It goes without saying that by using the composite sleeve fl) (1) with different inclination angles, it is easy to obtain rolling rolls having multiple pieces of caliber parts (3) of different shapes. In manufacturing the assembled roll according to the invention,
The arbor (2), which is the roll shaft, and the composite sleeve (13) were manufactured separately and then assembled into one piece.Since the casting and manufacturing of the arbor (1) is the same as before, The explanation will be omitted, and the manufacturing of the composite sleeve (1) will be explained.In the present invention, both the inner and outer layers (la) (l
b) are of different materials, and the bonding boundary FC between the two is different.
) is inclined with respect to the sleeve axis (1)
In manufacturing, as illustrated in FIGS. 7 and 8, a vertical centrifugal casting method is used. That is, as shown in both figures, a vertical centrifugal casting mold 17 has a flat bottom surface (5) followed by an inclined side wall (6) according to its inclination angle.
), first, the outer layer (1a
Since the outer layer (1a) is cast by pouring the molten metal for ) into the rotating mold, the rotating speed of the mold is relatively low to reduce the centrifugal force, as shown in Fig. 7. As illustrated in FIG.
a) is formed, and by increasing the centrifugal force by increasing the rotating speed of the mold relatively as shown in Fig. 8, a relatively steeply sloped outer layer (1a) is formed along the sloped side wall (6). These can be arbitrarily changed depending on the magnitude of the centrifugal force and the angle setting of the inclined side wall (6).

After casting the outer layer (1a) in this way, the molten metal for the inner layer (1b) made of a normal roll material is cast into the mold (7) by pour casting or the like, thereby forming the inclined side wall of the outer layer (1a). [6) The inner surface of the outer layer (la) solidified and formed in parallel with the molten metal on the inner layer (1b) side is joined and integrated, and here a joint inclined at an arbitrary angle with respect to the mold rotation center (sleeve axis) is formed. A composite sleeve material is cast by integrating the inner and outer layers (la) and (lb) with a boundary (C). After casting is completed, a fitting hole (4) is drilled in the center of the sleeve material taken out, and a composite sleeve (1) is obtained by performing necessary finishing operations. An assembled roll of the present invention can be obtained by assembling the rolls together using a screw fitting method or the like.

In the above embodiment, a rolling roll having a ■-shaped recessed caliber part (3) was described, but of course a mating rolling roll is required for rolling. A similar composite sleeve (1) can also be used for the V-shaped concave caliber portion (3) and the corresponding v-shaped protruding caliber portion. 11 As shown in the multiple caliber embodiment shown in FIG. 5, a pair of adjacent composite sleeves (1-2) to (1-3)
, (1-4) Both sleeves (1-2) (1-3), (1-4) as shown by the one-dot line (A) in (1-5)
(1-5) It is also possible to form a part of the V-shaped protruding caliber by joining the inner layers (1a) and (1a) in a chevron shape), No. 7.8
This can be easily understood from the casting explanatory diagram shown in the figure.

According to the invention, a rolling roll, in particular a rolling potash/<-
As a roll, it is extremely superior in that it can provide a strong roll at a low cost with a manufacturing method and structure that are easier than conventional ones.

In this type of rolling roll, it is necessary to use a highly hard wear-resistant material as the roll outer layer along the caliber surface, but since wear-resistant metal materials generally lack toughness, From the viewpoint of strength as a rolling roll that is used repeatedly under load and pressure, it is desirable to apply it only to the parts where it is needed. All of them have defects or problems. In contrast, in the present invention, both the inner and outer layers (1a) (
By using the composite sleeve (1) group in which the joining boundary (C) of different materials in lb) is inclined with respect to the sleeve axis, it is possible to combine a part of the caliber with a sleeve bear, with only the necessary rolling surface made of wear-resistant material. Therefore, it is possible to use an effective and waste-free wear-resistant material. Furthermore, in manufacturing and assembling, by using a vertical centrifugal casting means and adjusting the magnitude of the centrifugal force, the joining boundary fc) can be easily obtained at an arbitrary inclination angle, which allows for a fairly wide range of applications. A sharp shape can be obtained by joining and assembling sleeve bears face-to-face or back-to-back.1 It is extremely convenient for rolling shaped steel such as angle materials, and there is no risk of reducing the strength of the entire rolling roll, and the roll roll has low strength. It is possible to provide an assembled roll that is inexpensive, strong, and has great utility value for various rolling purposes including shape steel rolling.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view of an embodiment of the assembled roll of the present invention, FIG. 2 is a side view of the same, FIG. 3 is a longitudinal sectional front view of an embodiment of the composite sleeve, FIG. 4 is a side view of the same, and FIG. 5 15 A longitudinal sectional front view of an embodiment of multiple potions/<-- assembled rolls, FIG. , FIG. 9.10 is an explanatory view of an example of a conventional assembly rolling row A/1. (1) Composite sleeve, (1a) Outer layer, (1
b)...Inner layer, fcl...Joining boundary, (2)...Aper, (3)...Part of caliber, C41...Fitting hole,
(6)...bottom wall, C6)...slanted side wall, (7)...
・Mold for vertical centrifugal force casting. Patent Applicant: Kubota Iron Works Co., Ltd. 4 Tomi 7- ε Figure b 101 = 47-

Claims (1)

[Claims] 1. An assembled roll used for shape rolling, etc., in which a roll shaft and a plurality of sleeve groups each having a caliber shape are manufactured separately and assembled into one piece. The assembly is characterized in that each of the sleeve groups is a composite sleeve having both inner and outer layers whose joining boundaries are inclined with respect to the sleeve axis, and each sleeve is connected in series in the axial direction. roll. 2. We manufacture assembly rolls used for shape rolling, etc. After separately manufacturing a plurality of sleeve groups each having a roll shaft and a potion shape, they are assembled together, and the sleeves are formed by vertical centrifugal force casting means in the order of the outer layer and the inner layer.
A 12 system for manufacturing an assembled roll, characterized in that the composite sleeve is cast as a composite sleeve whose joining boundary between the inner and outer layers is set at an arbitrary angle of inclination with respect to the sleeve axis by adjusting the centrifugal force.