JPH0524101U - Ribbed steel plate manufacturing roll - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a roll for manufacturing a ribbed steel plate, which is made of a material having a hardness higher than that of conventional adamite, such as high-chromium cast iron, and which does not cause roll loss. [Structure] From the outer edge 11a of the caliber 11 located on the outermost side in the axial direction of the roll 2 to the roll end 2a of the roll 2.
The roll diameters up to are smaller than the roll diameter inside the caliber 11. From the outer edge 11a of the outermost caliber 11 to the roll end 2a of the roll 2, there is no portion having the same diameter as the inner roll diameter of the caliber 11.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a roll for manufacturing a ribbed steel plate.

[0002]

[Prior Art]

 Conventionally, the material of the caliber roll used for rolling ribbed steel sheets (hot-rolled steel sheet with surface ribs = steel sheet with vertical striped protrusions) has mainly been adamite. 2 to 4 illustrate the relationship between the caliber shape and the metal flow of the ribbed steel sheet manufacturing roll. 2 is an overall view showing the roll and the steel plate, FIG. 3 is a cross-sectional view showing the shape of one end of the roll in the axial direction, and FIG. 4 is a cross-sectional view showing the central part. The double arrow A indicates the direction of force, and the single arrow B indicates the direction of metal flow. 4 is a normal roll. As shown in the figure, a plurality of calibers are provided in the circumferential direction of the outer peripheral surface of the roll 2 at a predetermined interval in the axial direction of the roll for manufacturing a steel plate with ribs (hereinafter, simply referred to as “roll”) 2. In the other calibers except for the outermost caliber 11, the caliber A is balanced among the calibers as shown in FIG. On the other hand, in the outermost caliber 11, it is known that an unreasonable force A is applied to one side (outer side), as shown in FIG.

Further, if the roll diameter from the outer edge 11a of the outermost caliber 11 to the roll end and the roll diameter inside the inner edge 11b of the caliber 11 are made the same as shown in FIG. It is also known that the shape of the steel sheet becomes an ear wave, which causes problems on the strip during rolling. Therefore, a process called "edge drop" is applied to both ends of the roll 2. FIG. 5 is a cross-sectional view showing a shape of one end portion in the axial direction of the roll showing a processing example of a conventional end cutting. As shown in FIG. 5, in the conventional edge drop, the roll diameter at the predetermined distance x between the roll end and the outer edge 11a of the caliber 11 is larger than the roll diameter inside the caliber 11. The roll diameter is made smaller and the remaining distance y is made the same as the roll diameter inside the caliber 11. Thus, the reason that only the roll diameter at the distance x is made smaller than the roll diameter at the distance y is to ensure the mountain height at both ends of the steel sheet to be rolled. Furthermore, chamfering processing is performed on the edges 11a and 11b on both sides of the caliber 11 to disperse the pressure (not shown), and this is the same for other calibers. This chamfering process is performed by a pencil grinder.

[0004]

[Problems to be solved by the device]

 In the roll for steel plate manufacturing with ribs, which has been subjected to the above-mentioned end trimming processing on both ends of the roll, the material was conventionally adamite, so the roll caused by the pressure applied to both ends of the roll as described above. The damage was rare. On the other hand, in recent years, as a material for a roll for manufacturing a ribbed steel sheet, a material having a hardness higher than that of adamite, such as high-chromium cast iron, is often used. In the roll for manufacturing ribbed steel plate made of high chrome cast iron, with the caliber shape with end trimming as shown in FIG. there were. Therefore, an object of the present invention is to provide a roll for manufacturing a ribbed steel plate which is made of a material having a hardness higher than that of conventional adamite, such as high chromium cast iron, and which does not cause roll loss.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, in this invention, a caliber is formed in the circumferential direction of the outer peripheral surface of the roll, and the caliber is provided with a plurality of ribs at predetermined intervals in the axial direction of the roll. In the steel sheet manufacturing roll, the roll diameter of the roll from the outer edge of the caliber located on the outermost side in the axial direction of the roll to the roll end is smaller than the inner roll diameter of the caliber. I have.

Next, the invention will be described with reference to the drawings. FIG. 1 shows one embodiment of the present invention and is a sectional view showing the shape of one end of the roll in the axial direction. As shown in the figure, the roll diameter from the outer edge 11a of the caliber 11 located on the outermost side in the axial direction of the roll 2 to the roll end 2a of the roll 2 is smaller than the inner roll diameter of the caliber 11. Has been formed. Further, chamfers are applied to the edges 11 a and 11 b on both sides of the caliber 11 and the edges on both sides of the other calibers (not shown). As described above, in the roll of the present invention, the portion having the same diameter as the inner roll diameter of the caliber 11 is from the outer edge 11a of the outermost cover 11 to the roll end 2a of the roll 2. not exist.

By forming the shape of both ends of the roll 2 in the axial direction as described above, the most burdensome force on the outer edge 11a of the caliber 11 can be released to the outside. Also, the chamfering applied to each edge of the caliber helps disperse the stress to each edge. By making this chamfer larger than that of the conventional chamfer shown in FIG. 5, the distribution of stress to each edge portion is more effective than that of the conventional one. Furthermore, this chamfering process can be performed by a lathe.

[0008]

【Example】

The hot-rolled steel sheet with surface ribs was rolled using the roll for producing ribbed steel sheet of the present invention made of high-chromium cast iron. P, D, H, L ₁ , L ₂ and F shown in FIG. 1 are defined as follows. P: Load applied to the roll 2 during rolling D: Step outside the outer edge 11a of the caliber 11 located on the outermost side H: Depth of the caliber 11 L ₁ : Width of the caliber 11 (long part) L ₂ : Caliber Width of 11 (short part) F: Force applied to the outer edge 11a of the caliber 11. Then, the step D on the outer side of the outer edge 11a of the caliber 11 was set to 0.3 mm, and the steel sheet was rolled under the same rolling condition as the conventional one. The step D on the outer side of the outer edge 11a of the caliber 11 was obtained by the following method. When each parameter (P, D, H, L ₁ , L ₂ , F) is assumed as described above, F is represented by the following (1). FαK · f (1 / D, P, 1 / H, 1 / L 1, 1 / L 2) ─ (1) formula, however, K: constant. Since P, H, L ₁ and L ₂ are almost constant, F = K ′ / D, and in the roll for ribbed steel sheet production using high chromium cast iron as a material, empirically, F / K ′ = 3.5 is required and D ≧ 0.28mm. Therefore, if D is 0.28 mm or more, roll loss can be prevented, but if the value of D is too large, the peak height at both ends of the rolled steel sheet cannot secure the desired prescribed amount. For this reason, the step D on the outer side of the outer edge 11a of the caliber 11 is preferably made as small as possible, and in this embodiment, it is set to 0.3 mm. That is, the radius of the roll between the outer edge 11a of the outermost caliber 11 and the roll end 2a is 0.3 mm smaller than the radius of the inner roll of the caliber 11. In this example, the roll was not missing, and the desired peak height could be secured at both ends of the rolled steel sheet.

For comparison, the level difference of the rib-making steel plate manufacturing roll made of high chrome cast iron having the shape shown in FIG. 5 is set to 0.3 mm, that is, the roll at a predetermined distance x to the outer edge 11 a of the caliber 11 is rolled. The radius was made 0.3 mm smaller than the radius of the roll inside the caliber 11, and the hot-rolled steel sheet with surface ribs was rolled. In the comparative example, roll deficiency occurred at the outer edge 11a of the caliber 11.

[0010]

[Effect of the device]

 As described above, according to the present invention, there is provided a rib steel plate manufacturing roll that is manufactured from a material having a hardness higher than that of conventional adamite, such as high-chromium cast iron, and that does not cause roll loss. The industrially useful effects that can be obtained are brought about.

[Brief description of drawings]

FIG. 1 is a sectional view showing the shape of one end in the axial direction of a roll showing an embodiment of the present invention.

FIG. 2 is an overall view showing a roll and a steel plate

FIG. 3 is a cross-sectional view showing the shape of one end of the roll in the axial direction.

FIG. 4 is a cross-sectional view showing the central portion of the roll in the axial direction.

FIG. 5 is a cross-sectional view showing a shape of one end portion in the axial direction of the roll showing a processing example of a conventional end cutting.

[Explanation of symbols]

 1, 11 Caliber 11a Outer edge 11b Inner edge 2 Roll for manufacturing steel plate with ribs 2a Roll end 3 Steel plate 4 Normal roll

Claims (2)

[Scope of utility model registration request] 1. A roll for manufacturing a steel plate with ribs, wherein a caliber is formed on the outer peripheral surface of the roll in the circumferential direction, and a plurality of the caliber is provided at predetermined intervals in the axial direction of the roll. A roll for producing a steel sheet with ribs, wherein the roll diameter from the outer edge of the caliber located on the outermost side in the axial direction to the roll end is smaller than the roll diameter inside the caliber. 2. The roll for manufacturing a ribbed steel sheet according to claim 1, wherein the roll is made of high chromium cast iron.