JPS60227902A - Production of rolled thin metallic sheet - Google Patents

Abstract

PURPOSE:To produce a rolled thin metallic sheet having good quality without camber by slitting a rolled sheet which is formed by crown rolls provided with hollow grooves and has slender thick-walled parts at both side ends and a broad thick-walled part between said parts in the rolling direction at the broad thick- walled part. CONSTITUTION:The metallic sheet such as a steel sheet is passed between a pair of the crown rolls for rolling formed with the hollow grooves 4 at both ends in the transverse direction on the outside periphery and the center and is rolled by using backup rolls 8 provided thereto. The rolled sheet 2 having longitudinally the slender thick wall parts 5 at both side ends in the transverse direction and the broad thick walled part 6 having the width of about twice the width of the parts 5 and having the thin walled parts 7 between the parts 5 and the part 6 is thus obtd. The sheet 2 is then fed to a cutting section 9 where the sheet is slit in the longitudinal direction at the center in the transverse direction of the part 6. Two sheets of the thin rolled metallic sheets 3 having a prescribed width are thus obtd. at the same instant.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field 1] 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 1 Conventionally, a thin rolled plate is manufactured by rolling using a crown roll for up rolling, but in recent years, a wide rolled plate is rolled using a crown roll for rolling and the rolled plate is slit 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 slipped, there is a drawback that internal distortion occurs during rolling with a rolling crown roll, and the resulting rolled thin metal sheet is warped.

[Objective of the Invention 1 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 1 of the Invention The method for manufacturing a rolled thin metal sheet of the present invention is a method of manufacturing a rolled thin metal sheet 3 having a predetermined width by rolling a rolled sheet 2 with a rolling crown roll 1 and slitting it in the rolling direction. ,
Rolling is performed using a crown roll 1 for loaf rolling having a concave groove 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 thin metal plate 3 is formed by forming a rolled plate 2 having one or more wide thick inner parts 6 having a width twice as wide as the width of the rolled plate 2, and slitting the wide thick part 6 in the widthwise center in the rolling direction. It is characterized by
By configuring as described above, the drawbacks of the conventional example are solved.

The present invention will be explained in detail below with reference to Examples. The rolling crown roll 1 shown in FIG. #S1 is for producing two rolled thin metal plates 3. The outer peripheral 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 periphery in the width direction. As shown in FIG. 2, the rolling crown rolls 1 are arranged in pairs above and below.
A backup roll 8 is attached to the rolling crown roll 1, and a metal plate such as a steel plate is passed between the pair of rolling crown rolls 1 to be rolled to form a rolled plate 2. As shown in FIG. 3, this rolled plate 2 has narrow thick-walled portions 5 on both sides in the width direction extending in the direction of the operator's hand, and a narrow thick-walled portion 5 extending in the direction of the operator's hand at the center in the width direction. It has a wide thick part 6 with a width 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 wall portion 5 and the wide thick wall portion 6 is, for example, 1+nm, and the thickness of the civ wall portion 7 is 2 nm.
μ.

The rolled plate 2 thus formed is cut tI! As shown in FIG.
Manufactured between rows. The rolled thin metal plate 3 manufactured in this manner is used, for example, to make a resin-coated metal plate by punching a large number of through holes over the entire surface and coating both surfaces with a synthetic resin. The resin-coated metal plate is molded using a 7-ohming 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, there are 4 strips in 1 rolling crown roll! ! I groove 4
5, a rolled plate 2 having two wide and thick interior parts 6 is manufactured, and three strips of rolled thin metal plate 3 can be formed at the same time. Furthermore, if five or more grooves 4 are provided on the rolling crown roll 1, four or more rolled thin metal plates 3 can be manufactured at the same time.

[Effects of the Invention 1] As described above, the present invention uses a rolling crown roll having 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 thin metal plate is formed by forming a rolled plate having one or more wide thick parts having a width twice the width of the narrow thick part, and slitting the widthwise center of the wide thick part in the rolling direction. Therefore, even if many rolled thin metal sheets are manufactured from one rolled sheet at the same time,
The obtained rolled thin metal plate has thick parts on both sides in the direction of the operator's hand, and the thick parts have a rib effect, so that a high quality rolled thin metal plate without warping can be manufactured. Secondary products made from rolled thin metal sheets are also easy to manufacture.

[Brief explanation of the drawing]

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. 4 Same pressure! 5 is a sectional view of another example of the same rolled plate as above, 1 is a crown roll, 2 is a rolled plate, 3 is a rolled thin metal plate, 4 is a groove, 5 is a narrow thick walled portion, and 6 is a wide thick walled portion. Agent Patent attorney Ishi 1) Ai 7 Figure 1 Figure 5 Procedural amendment (voluntary) 2. Name of the invention Method for manufacturing rolled thin metal sheets 3. Relationship with the case of the person making the amendment Patent applicant Location Osaka Prefecture 1048 Kadoma, Oaza, Kadoma City Name (
583) Matsushita Electric Works Co., Ltd. Representative Iku Kobayashi 4, agent may be about 2 to 5 μm.

Claims (1)

[Claims] [11 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, using a rolling crown roll having grooves on the outer periphery. A rolled plate that is rolled and has narrow thick-walled portions at both ends in the width direction, and one or more wide thick-walled portions having a width twice the width of the narrow thick-walled portion between the narrow thick-walled portions. Form the widthwise center of the wide thick part in the rolling direction.
) A method for manufacturing a rolled thin metal sheet, comprising: forming a rolled thin metal sheet.