JPS6013528Y2 - Assembly roll for rolling shaped steel - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a new and improved proposal of a composite roll structure using a sleeve shrink-fitting method as an assembly roll for rolling section steel.

In rolling rolls for rolling and forming various types of steel, rolls with an end flange or part of the caliber on the outer periphery of the roll body are used, but the part of the caliber that comes into contact with the rolled steel material is Abrasion resistance and heat cracking resistance are required.

Particularly in cases where some parts of the caribah have sharp corners, there are many accidents where cracks form in these parts and lead to the body breaking.

Therefore, the outer layer of the roll having such a caliber part is
A material that has the above-mentioned required properties is required, but on the other hand, it is advantageous to use a material that is stronger and does not take wear resistance into consideration for the roll core side. Therefore, this type of roll often adopts a composite roll structure in which the outer layer and core are made of different materials.

In addition, as a composite roll structure, a structure in which a separately formed end flange or part of the caliber is shrink-fitted to the outer periphery of an arbor that serves as the roll core is also known. It is required to prevent movement or misalignment of the shrink fit end flanges and calibers in the axial and circumferential directions, to facilitate the shrink fit work, and to be able to reuse the arbor.

The present invention is an assembly roll for shape steel rolling in which the end flange and part of the caliber are shrink-fitted to the outer periphery of the arbor, and is designed to more fully satisfy the above requirements. An assembled roll for rolling shaped steel in which at least two shrink-fit sleeves such as the above are shrink-fitted over the entire length of an arbor, the inner surface of each sleeve is a smooth inner surface without a groove, and the outer circumferential surface of the arbor has: forming grooves corresponding to the full width of the smooth inner surface of each sleeve with gaps in the axial direction, and shrink-fitting each sleeve to the arbor at each groove;
The point is that a gap is provided between adjacent sleeves in the axial direction.

The present invention will be described in detail below with reference to the illustrated embodiment. Fig. 1 shows an example of a roll for rolling section steel in which the present invention is implemented. To show the general structure of the roll B, both ends of the roll are provided with driving parts 5, 5, and an end flange 1 is provided on the outer circumferential surface of the body part 3 of the roll via the roll neck parts 4, 4 that follow this. .1, a required number of caliber parts 2, 2 are integrally molded between these flanges 1, 1, respectively.

The caliber part 2 in the illustrated example has a sharp ridge-shaped protrusion surface because it is formed into an angular shape.

In such a roll for rolling shaped steel, when all of these parts are formed as an integral structure by casting or other means,
As mentioned earlier, different properties are required for the materials of the roll core and the end flanges 1, 1 and caliber parts 2, 2, which are the roll outer layers, depending on the purpose of use. In order to satisfy these requirements at the same time, a composite roll assembly structure is used in which the roll core and the roll outer layer are manufactured separately and then integrated by shrink fitting or the like.

FIG. 2 shows one embodiment of an assembled roll according to the present invention. For convenience of explanation, the present invention is applied to roll B shown in FIG. An end flange sleeve 7 having an end flange portion having a desired shape on its outer periphery and a caliber sleeve 8 having a caliber ring having a desired shape on its outer periphery are shrink-fitted onto the outer circumferential surface of the arbor 9 having a roll neck portion and a roll neck portion. In this case, the inner surface of the sleeve 7.8 in each part of the sleeve 7. a
, 8a have smooth inner surfaces without grooves, whereas each rib 7.8 on the outer circumferential surface of the arbor 9
In the position for shrink fitting, the smooth inner surface 7 of the sleeve 7.8
Grooves 10 corresponding to the full width of sleeves 7.a and 8a are formed in the shape of concave circumferential grooves at intervals in the axial direction, and these grooves 10 and the inner surfaces 7a and 8a of each sleeve 7.8 are shrink-fitted and integrated. It will be done.

In this example, the total number of sleeves 7.8 is 4, but this number is at least 2 over the entire length of the arbor 9.
The number is considered to be more than 1.

An axial gap is provided between adjacent sleeves 7.8.

The embodiment shown in FIG. 3 differs from the embodiment shown in FIG. 2 in that each end flange and caliber ring are provided with independent sleeves 7.8, and there is no As shown in the figure, the end flange 17 and the caliber ring 18 are integrally formed, and the inner surface 11a of the sleeve 11 to which the sleeve 11 is shrink-fitted is a smooth inner surface 1 having no grooves at all.
1a is the same, and a groove 10 having the same width as the full width of the smooth inner surface 11a is similarly formed on the required outer circumferential surface of the arbor 9, and the groove 10 and the smooth inner surface 11a allow a shrink fit. The same applies to what is done.

In the embodiment shown in FIG. 4, one end flange 17 and two caliber rings 18, 18 are integrally formed on the outer peripheral surface of the shrink-fit sleeve 12.
In this case as well, the inner surface of the sleeve 12 to be shrink-fitted is a smooth inner surface 12a without a groove, whereas the arbor 9 is formed with a groove 10 having the same width as the entire width of the inner surface 12a.
In the embodiment shown in FIG. 5, three caliber rings 18 are arranged in a row on the outer peripheral surface of the shrink-fit sleeve 13 having a smooth inner surface 13a. , the groove 10 of the arbor 9 and the smooth inner surface 1
As shown in each of these embodiments, in the present invention, the sleeve that is shrink-fitted onto the Dever 9 has an independent sleeve 7 on each end flange and one surface of the caliber. .8, the same effect is obtained even if the sleeves 11, 12, and 13 are formed in such a way that the end flange and the caliber part are connected (the combination is free). The shrink-fit inner surface has no groove at all, and the shrink-fit surface of the arbor 9 is formed into a groove 10 having the same width as the entire width of the smooth inner surface, and is integrated with the sleeve. The number is at least two over the entire length of the arbor.

Needless to say, the cross-sectional shapes of the end flange and caliber ring can be freely designed depending on the intended rolling roll.

That is, Fig. 6 I, n. As shown in FIGS. 1 to 5, one example is shown in FIG. The sleeve 11 is a combination of a caliber ring 18 and an end flange 17 to obtain the angle shape shown in Fig. 2, and the sleeve 11 is a combination of a caliber ring 18 and an end flange 17 to obtain an H-shaped steel C. The cross-sectional shape of a part of the caliber is made into a shape according to the purpose of rolling, as shown in FIG. .

The internal fit allowance, the depth of the groove 10, etc. are designed to withstand rolling torque and thrust load, as in conventional shrink fit.

As shown in FIG. 7, the sleeve 7.8 may, of course, be made of a composite material, such as an outer sleeve layer 19 having wear resistance and an inner sleeve layer 20 having toughness.

Needless to say, this can also be applied to the sleeves 11, 12 and 13.

According to the assembly roll of the present invention, the shrink fit sleeves 7.8 to 11. include the arbor 9 and the end flange and caliber part that are shrink fit to the arbor 9. 12. 13, the roll core and outer layer can be made of materials that have sufficient properties required for the purpose of the roll, and a roll with improved breakage resistance can be obtained. Needless to say, in the present invention, when shrink-fitting such a shrink-fit sleeve onto the arbor 9, the inner surface of the sleeve is made smooth without any grooves, and this is used as the inner surface of the sleeve on the arbor 9.
Since the shrink fit is made in the groove 10 formed with the same width on the outer circumferential surface of the arbor 9, a groove is formed on the inner surface of the conventional shrink fit sleeve, and this groove is formed into a convex stepped groove on the outer circumferential surface of the arbor 9. Compared to the case where the sleeve is shrink-fitted to a convex portion, there is no need to form a groove on the inner surface of the sleeve, it is easier to process, and the strength of the sleeve is not impaired. Since the arbor 9 is shrink-fitted to the arbor 10 in a drop-in manner, the work on the arbor 9 is easy, and by embedding the shrink-fitted surface in the arbor, the resistance against displacement in the axial direction is increased. Coupled with the expansion of the shrink fit surface, it provides solidity that can withstand heavy loads, and the arbor 9 can be reused, making the shrink fit work easier, and is an improvement over the conventional method for this type of assembly roll. It is excellent as.

Further, since at least two or more sleeves are shrink-fitted over the entire length of the arbor 9, and relatively short sleeves are shrink-fitted to the arbor 9, the shrink-fitting operation is easy.

Furthermore, the grooves 10 of the arbor 9 are formed at intervals in the axial direction, and each sleeve is independently shrink-fitted into each groove 10, so that the axial displacement of each sleeve can be prevented separately. In addition, since there are multiple sleeves and the length of the sleeves is relatively short, axial shrinkage after shrink fitting of the sleeves is small, and each sleeve and arbor 9
The gap in the axial direction that occurs between each groove portion 10 is also small,
This is more advantageous in preventing the sleeve from shifting in the axial direction.

Further, since a gap is provided between adjacent sleeves in the axial direction, force can be prevented from being applied to each sleeve from the adjacent sleeve, and the prevention of displacement of each sleeve in the axial direction can be further strengthened.

[Brief explanation of drawings]

Fig. 1 is a half longitudinal sectional front view of an example of a shaped steel rolling roll, Fig. 2 is a half longitudinal sectional front view of an embodiment of the roll of the present invention, and Fig. 3.4.5.
．． 7 is a front view of a modified embodiment of the sleeve, and FIG. 6 is an explanatory diagram of a partial application of the caliber. 7... End flange sleeve, 8...
・Caliber ring sleeve, 11, 12, 13...
...Sleeve, 7at 8a, 11a* 12aw
13a...Smooth inner surface, 9...Arbor, 10...Groove portion, 17...End 7 lange, 18...Caliber ring.

Claims (1)

[Scope of utility model registration request] An assembly roll for rolling section steel in which at least two or more shrink-fit sleeves such as end flanges, parts of calibers, etc. are shrink-fitted over the entire length of the arbor, and the inner surface of each sleeve is a smooth inner surface without grooves. , grooves corresponding to the full width of the smooth inner surface of each sleeve are formed on the outer peripheral surface of the arbor at intervals in the axial direction, each sleeve is shrink-fitted to the arbor at each groove, and a gap in the axial direction is formed between adjacent sleeves. An assembly roll for rolling shaped steel, characterized by being provided with.