JPH0462801B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a method of manufacturing a rolled thin metal plate of a predetermined width by slitting a rolled plate rolled with a rolling crown roll in the rolling direction.

[Background technology] Conventionally, thin rolled plates have been produced by rolling using rolling crown rolls, but in recent years, wide rolled plates have been rolled with rolling crown rolls to slit the rolled plates in the rolling direction. In order to improve productivity, a large number of rolled thin metal sheets of a predetermined width are manufactured simultaneously. However, when a rolled sheet is slit, there is a drawback that internal distortion occurs during rolling with a rolling crown roll, and the resulting rolled thin metal sheet is warped.

[Object of the Invention] The present invention has been made in view of the above points, and an object of the present invention is to form thick-walled portions on both sides in the longitudinal direction, and to prevent warping due to the rib effect of the thick-walled portions. An object of the present invention is to provide a method for producing a rolled thin metal plate that can produce a rolled thin metal plate that does not require the following.

[Disclosure of the Invention] The method for producing a rolled thin metal plate of the present invention is a method of producing a rolled thin metal plate 3 of a predetermined width by rolling a rolled plate 2 with a rolling crown roll 1 and slitting it in the rolling direction. , is rolled using a rolling crown roll 1 having concave grooves 4 on the outer periphery to have a narrow thick wall portion 5 at both ends in the width direction, and a narrow thick wall portion 5 between the narrow thick wall portions 5. A rolled plate 2 having one or more wide thick walled parts 6 having a width twice the width of the rolled plate 2 is formed, and the widthwise center of the wide thick walled part 6 is slit in the rolling direction. Continuous rolled thin metal plate 3
The present invention is characterized in that it forms, and by configuring it as described above, the drawbacks of the conventional example are solved.

The present invention will be explained in detail below with reference to Examples. A rolling crown roll 1 shown in FIG. 1 is used for manufacturing two rolled thin metal sheets 3. The outer circumferential surface of this rolling crown roll 1 has a predetermined crown shape, and grooves 4 are provided at both ends and in the center of the outer circumference in the width direction. The rolling crown rolls 1 are arranged in pairs, one above the other, as shown in FIG. By passing it through, it is rolled and a rolled plate 2 is formed. As shown in FIG. 3, this rolled plate 2 has a narrow thick wall portion 5 extending in the longitudinal direction on both sides in the width direction, and a narrow thick wall portion 5 extending in the longitudinal direction at the center in the width direction. It has a wide thick part 6 that is twice the width, and a thin part 7 between the narrow thick part 5 and the wide thick part 6. The thickness of the narrow thick part 5 and the wide thick part 6 is, for example, 1 mm, and the difference between the thickness of the narrow thick part 5 and the wide thick part 6 and the thickness of the thin part 7 is, for example, 2 to 5 μm. That's about it. Further, the width of the narrow thick portion 5 may be, for example, about 5 to 30 mm. The rolled plate 2 thus formed is sent to a cutting machine 9, where it is slit in the rolling direction at the widthwise center of the wide thick part 5, as shown in FIG. Two pieces are manufactured at the same time. The rolled thin metal plate 3 manufactured in this way is, for example, perforated with a large number of through holes over the entire surface, coated with synthetic resin on both sides,
Used to produce resin-coated metal sheets. The resin-coated metal plate is formed by a forming device or the like to manufacture rain gutters and the like.

In the above embodiment, the production of two rolled thin metal plates 3 has been described, but two or more strips can be produced in the same manner. In other words, rolling crown roll 1
When four grooves 4 are provided in the strip, a rolled plate 2 having two wide thick portions 6 is produced as shown in FIG. 5, and three rolled thin metal plates 3 can be formed at the same time.
In addition, the crown roll 1 for rolling has five or more concave grooves 4.
By providing this, four or more rolled thin metal plates 3 can be manufactured at the same time.

[Effects of the Invention] As described above, the present invention rolls using a rolling crown roll provided with concave grooves on the outer periphery, and has narrow thick-walled portions at both ends in the width direction, and also has narrow thick-walled portions between the narrow-width thick-walled portions. A rolled plate having one or more wide thick parts with a width twice the width of the narrow thick part is formed, and the widthwise center of the wide thick part is continuous in the rolling direction of the rolled plate. Since a rolled thin metal sheet is formed by slitting, even if a large number of rolled thin metal sheets are manufactured at the same time from one rolled sheet, the resulting rolled thin metal sheet has a thickness that extends in the longitudinal direction on both sides. A rolled thin metal plate that has a thick wall part and has a rib effect due to the thick wall part and that does not warp and is of good quality, and it is easy to manufacture secondary products from the rolled thin metal plate. In addition, if the widthwise center of the wide thick part is slit in the rolling direction, continuous lengths can be obtained from one rolled plate by slitting in the rolling direction of the rolled plate after rolling. A plurality of rolled thin metal plates can be manufactured continuously.

[Brief explanation of drawings]

FIG. 1 is a front view of a rolling crown roll for carrying out the method of the present invention, FIG. 2 is a schematic cross-sectional view of the same as the above in a rolling state, FIG. 3 is a perspective view showing the same as the above rolled plate, and FIG. 5 is a sectional view of another example of the same rolled plate as above, in which 1 is a crown roll, 2 is a rolled plate, 3 is a rolled thin metal plate, and 4 is a sectional view of another example of the same rolled plate as above. 5 is a concave groove, 5 is a narrow thick portion, and 6 is a wide thick portion.

Claims (1)

[Claims] 1. In a method of manufacturing a rolled thin metal plate of a predetermined width by rolling a rolled plate with a rolling crown roll and slitting it in the rolling direction, rolling is performed using a rolling crown roll with grooves provided on the outer periphery. and has a narrow thick walled portion at both ends in the width direction, and a wide thick walled portion twice the width of the narrow thick walled portion between the narrow thick walled portions.
- A rolled thin metal plate comprising a plurality of rolled plates, and a rolled thin metal plate that is continuous in the rolling direction of the rolled plate by slitting the widthwise center of the wide thick part in the rolling direction. manufacturing method.