JPS61147904A - Manufacture of corrugated sheet - Google Patents

Abstract

PURPOSE:To make the quality of corrugated sheets uniform by rolling a sheet stock to produce the difference in working ratio of the same distribution in its width direction, through the difference in working ratio of its cross section in its longitudinal direction. CONSTITUTION:A sheet stock 3 having the central part larger in thickness than its side ends is rolled by flat rolls 1, 2 into a sheet 4 corrugated in its longitudinal direction. The drafts by the flat rolls 1, 2 at the side ends and central part of sheet stock 3 are different from each other, because the thickness of the central part of stock 3 is smaller than those of the side ends. That is, the stress produced in the side end is larger than that produced in the central part. Accordingly, the extended amount of the side end is larger than that of the central part in the longitudinal direction, and the extended side-end is plastically deformed into a corrugated form in the longitudinal direction by the action of stock 3 itself, and a stably corrugated sheet 4 is obtained. At that time, the difference in working ratio in the longitudinal direction and the difference in working ratio of the same distribution in the width direction are accurately produced, to improve the quality of a corrugated sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a rolling method for corrugating a metal plate.

[Prior Art] Conventionally, processing methods for deforming a plate material into a corrugated shape include a method using a batch type press using a mold of a desired shape, and a method using a continuous method using an embossing roll.

However, in the former case, there are limitations such as slow processing speed and limited size of the workpiece. In the latter case, the rolls must be replaced in order to process various sheet widths, and the rotation of the upper and lower rolls must be controlled at the same speed.
Otherwise, it has drawbacks such as the inability to produce processed materials with uniform thickness.

As described above, the above method has the problem that it is inefficient and difficult to obtain a desired material of good quality and uniformity.

An object of the present invention is to provide a method for manufacturing a corrugated plate material that can be easily processed from a plate material into a workpiece of good quality and desired shape.

An object of the present invention is to provide a highly productive and efficient method for manufacturing a corrugated plate material.

[Means for Solving the Problems] The above object is to roll a strip material plate so that the difference in working degree in the longitudinal direction in an arbitrary cross section of the strip material plate material is distributed in the width direction with substantially the same distribution. This is achieved by a method for producing a corrugated plate material, which is characterized by causing waveform deformation in the longitudinal direction of a desired region.

The present invention will be explained in further detail.

The present invention uses a commonly used simple roll or the like to roll a plate material, and when rolling the plate material, an unregulated working degree is applied to the contact surface and/or non-contact surface formed between the plate material and the roll. By applying it in the direction, waveform deformation is caused in the desired region in the longitudinal direction.

Therefore, in order to meet the above requirements, it is preferable to use various plate materials having different thicknesses in the width direction, so that various desired materials can be efficiently manufactured. That is, the size and shape can be easily manufactured without changing the rolls.

Alternatively, the above requirements can be similarly met by using rolling rolls with different rolling reduction ratios for the plate material to be rolled, that is, rolls that do not have a constant roll diameter in the roll width direction but have a varying roll diameter.

In this case, a combination with a flat roll is common, but it is also possible to combine the same roll with a different roll diameter, taking into account the shape of the material plate, the shape of the desired corrugated material, etc.

Therefore, by combining various plate materials and various rolls, it is possible to easily manufacture desired materials with good and uniform quality.

Further, applicable materials include general nonferrous metals such as copper, copper alloys, and aluminum alloys, steel materials, and composite materials made of metals and nonmetals.

[Function and Examples] Examples will be described below with reference to the accompanying drawings.

1 and 3 are simplified diagrams for explaining an embodiment of the method of the present invention.

Figure 2(a) shows the AA-
FIG. 3 is a cross-sectional view, and (b), (al, and (i))' are cross-sectional views of as-, aa', and bb-, respectively, after processing.

In Fig. 4, cross-sectional views of the plate material shown in Fig. 3 before and after processing are shown in (C) and (d), respectively, and Fig. 3 CC=
A vertical cross-sectional view is shown in (d-).

The unprocessed plate material 3 is rolled by flat rolls 1.2 to form a processed plate material 4 having a corrugated shape in the longitudinal direction.

In FIG. 2(a), the portion of the plate material 3 before processing including point D has a thickness smaller than that of the peripheral edge portions C and E.

Therefore, the portion including rolling points C and E and the portion including point D of rolling 1i differ in the working degree by the flat roll 1.2, that is, in this case, the rolling reduction rate. That is, the stress applied to the plate 3 by the 0-rules 1 and 2 differs depending on the part of the plate 3, and the stress applied to the plate 3 by the C and E
It acts strongly in part D, and weakly or hardly at all in part D. Therefore, the amount of elongation of the constituent substances of the plate material particularly in the longitudinal direction in the C and E sections, that is, the amount of elongation is large, and the amount of elongation in the D section is small or almost non-existent. The extended C and E parts are the second
The processed plate material 4 is stabilized by being acted upon by the plate material itself so as to recover to the position shown in Fig. 2(a), and as a result is plastically deformed into a waveform in the longitudinal direction (Fig. 2(t)).
It is formed as shown in (a'') and (b'').

The plate material 4 after processing has a uniform thickness as shown in FIG.
, corresponding to point E, respectively, and C, D.

E Included in a cross-sectional view that substantially matches the cross-sectional view having each point.

A similar principle to that described above also explains the embodiment shown in FIG.

That is, in FIG. 3, the plate material (C
), the rolls 5 have different diameters, with the roll diameter F located at the center being the minimum, increasing the roll diameter toward both ends, and rolling down the rolls 5 at both ends. The diameter is changed so that the roll diameter G becomes maximum.

Further, the flat roll 6 stably holds the plate material 7. Therefore,
Similar to the above, wave-like deformations are formed at both ends of the plate 7 in the longitudinal direction as shown in FIG. 4 (d>(dl).

In order to obtain a processed material with uniform quality, it is preferable that the plate materials used in the present invention have the same cross-sectional shape. It can be applied to material plates having a cross-sectional shape.

The device used for rolling is not limited to the above-mentioned rolls, and any rolling mill may be used as long as the present invention is applicable.

[Effect of the invention] By using the method of the present invention, it is possible to easily produce
A desired corrugated plate material with uniform quality can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a simplified illustration of an embodiment of the method. Figure 2 (a) is the Figure 1 A/MIFiffi diagram 1,
2(b), (a"), and (b-) are sectional views of 8B'. aa=, bb-, respectively. FIG. 3 is an explanatory diagram of an embodiment of this method. Figures (c) and (d) are cross-sectional views of the material plate before and after processing by the method shown in Figure 3, respectively.
(d') is a longitudinal sectional view of a part of the CC shown in FIG. 3. 1.2...Flat roll, 3...Plate material before processing. 4... Plate material after processing, 5... Rolls with different diameters. 6...Flat roll. Showa year month day

Claims (3)

[Claims] (1) Generating waveform deformation in the longitudinal direction of a desired area of the material plate by rolling the strip material so that the difference in working degree in the longitudinal direction in an arbitrary cross section occurs in the width direction with substantially the same distribution. A method for manufacturing a corrugated plate material characterized by: (2) A method for producing a corrugated sheet material according to claim 1, characterized in that sheet materials having the same cross-sectional shape and uniform or different sheet thicknesses in the width direction are used. (3) The corrugated plate material according to claims 1 and 2, characterized in that rolls consisting of rolls having the same or different roll diameters from the roll axis in at least one roll are used for rolling the material plate material. manufacturing method.