JPH04322802A - Spreading device for metallic plate - Google Patents

Abstract

PURPOSE:To offer a device for efficiently spreading metallic plate with high quality and at a low cost. CONSTITUTION:After a metallic plate or metallic strip is formed into a state with waves in the breadthwise direction, this device is used for spreading process of the width of that corrugated metallic plate or metallic strip and plural pairs of roll groups are arranged in the longitudinal direction. The shape of roll gap of respective pairs 9a, 9b of rolls is made into smooth shape where the middle part is smaller and where the end parts are larger. Those roll groups are arranged so that the shape of roll gap becomes flat shape gradually from the upstream side to the downstream side of roll groups.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for widening a long metal plate or strip.

0002

2. Description of the Related Art Conventionally, as a means for widening a long metal plate or metal strip, as disclosed in Japanese Patent Publication No. 50-1463, a sinusoidal wave-like unevenness is formed in the roll axis direction as shown in FIG. After forming the metal plate material 2 into a plate material having waves in the width direction using a pair of rolls 1a and 1b,
A method is known in which the waves of a corrugated plate material 2 are expanded using flat rolls 3a and 3b as shown in FIG.

On the other hand, as disclosed in Japanese Unexamined Patent Publication No. 58-184002, when widening a corrugated plate material using a plurality of sets of flat rolls arranged in the longitudinal direction, first, the roll gap is adjusted to the wave height. As shown in Fig. 11, the center part of the corrugated plate material 2 in the width direction is A method is known in which the waves are gradually expanded at the ends of the waves.

0004

[Problem to be Solved by the Invention] In the case of these conventional techniques, for example, in the technique disclosed in Japanese Patent Publication No. 50-1463, a flat roll is used to expand the waves of a corrugated plate material. By the way, Figure 1
As shown in Fig. 2, since each convex portion of the corrugated plate material 2 and the outer peripheral surfaces of the flat rolls 3a and 3b are in contact with each other simultaneously in the entire area in the width direction of the plate, the displacement in the width direction is restrained in the entire contact area of the corrugated plate material 2. box office. As a result, surface flaws due to buckling and the like occur. Further, there is a problem in that it is difficult to obtain a sufficient width widening amount in one pass, and multiple passes including corrugation processing are required in order to obtain a desired width widening amount. On the other hand, when using the technique disclosed in, for example, Japanese Unexamined Patent Publication No. 58-184002, the above-mentioned problem occurs due to the use of flat rolls. Furthermore, when using a device in which rolls 4a and 4b having roll body lengths corresponding to the wavelength and wave height of the corrugated plate material 2 are sequentially arranged as shown in FIG. 11, the amount of width expansion is increased compared to the processing method described above. However, in order to prevent surface flaws due to contact between the roll body end and the corrugated sheet material 2 when expanding the corrugations of the corrugated sheet material 2, various methods corresponding to the wave height of the corrugated sheet material 2 must be applied. It is necessary to prepare a roll having a roll body length of . Therefore, there was a problem in that the equipment cost was large, and furthermore, the rolls needed to be changed in accordance with the wave height of the corrugated plate material 2, resulting in a decrease in productivity.

That is, the flat roll 3 shown in FIG.
When the corrugations are pushed out using rollers a and 3b, the flat rolls 3a and 3b simultaneously contact each convex part of the corrugated plate material 2 over the entire width of the plate, and the rolling force applied to each contact point is applied to the central part in the width direction of the plate. increases towards. This means that the resultant force of the widthwise components of the forces acting on the corrugated plate material 2 from the flat rolls 3a, 3b at the contact points closer to the ends in the width direction is applied as a compressive force to the central part in the width direction of the plate. Also, plate material 2
The restraint force against the width expansion is the sum of the rolling force applied to each contact point multiplied by the friction coefficient. Therefore,
When applying wave spreading processing using a flat roll as disclosed in Japanese Patent Application Laid-Open No. 1463 and 1984-184002, the restraining force at the central part in the width direction of the plate increases, and the width of the plate increases. The effect becomes smaller. Further, since the restraining force against the width expansion of the plate material is directed entirely toward the central portion in the width direction of the plate, and the restraining force increases at the central portion in the width direction, surface flaws are likely to occur in the plate material.

[0006] Furthermore, when considering the adjustment of the amount of width expansion in the process of spreading the corrugations of a corrugated plate material, there is a method of changing the wave height by adjusting the roll gap of the grooved rolls in the corrugation process. With this method, for example, as shown in Fig. 13, when the roll body length is set in the longitudinal direction and the arranged roll group is used to expand the waves of the corrugated plate material 2 with different wave heights, 1 as shown in 13(a) and (b)
Due to the difference in the amount of width expansion of the passes, the end of the roll body and the corrugated plate material 2 come into contact with each other at the entrance of the roll bite after the second pass, and surface flaws 7 occur. Therefore, JP-A-58-18
As disclosed in Japanese Patent Application No. 4002, in an apparatus composed of a plurality of roll groups arranged in the longitudinal direction, it is possible to ensure high width widening efficiency and to apply waves to a corrugated board without generating surface flaws. In order to perform the spreading process, it is necessary to prepare rolls with various roll body lengths that correspond to the wave height of the corrugated sheet material, and it is also necessary to change the rolls according to the wave height of the corrugated sheet material. shall be.

The present invention solves the above-mentioned conventional problems, and
The purpose of the present invention is to provide a metal plate widening device that has high productivity, high quality, low cost, and high efficiency.

[0008]

[Means for Solving the Problems] The gist of the present invention is an apparatus used in the process of widening the width of a corrugated metal plate or metal strip, which comprises a plurality of roll groups arranged in the longitudinal direction,
The roll gap shape of the roll group is a smooth shape with a small center part and a large end part, and the roll gap shape is arranged so that it gradually becomes a flat shape as it goes from the upstream side to the downstream side of the roll group. This is a special feature of the processing equipment for widening the width of metal plates.

[0009]

[Operation] The present invention will be explained in detail below.

For example, as shown in FIG. 8, a rolling mill 5 has grooved rolls having sinusoidal waves in the width direction.
The corrugated plate material 2 formed by is passed through the metal plate width widening processing device 6 of the present invention. As a result, the spreading process of the corrugated plate material 2 from the center in the width direction to the ends in the width direction is carried out without being constrained by displacement in the width direction so as to shift over time. That is, in a plurality of roll groups arranged in the longitudinal direction, for example, as shown in FIG. 1, first, the upstream roll gap shape (1) is used to expand the waves in the widthwise center of the corrugated plate material,
Next, using the roll gap shape (2), the waves closer to the ends than the center in the width direction of the corrugated plate material are expanded, and further downstream, the waves closer to the ends in the width direction are expanded.

In the case of the apparatus of the present invention, the corrugation of the corrugated plate material 2 is expanded as shown in FIG. 2, for example. That is, the spreading process of the corrugated board material 2 is performed by dividing it over time from the central part in the board width direction to the end parts. Therefore, the number of contact points that are simultaneously constrained in the plate width direction is significantly reduced, and the restraining force in the plate width direction does not become large, so it is possible to secure a sufficient amount of width expansion for the plate material 2, and it also prevents buckling, etc. Surface flaws are less likely to occur.

Furthermore, in the case of the apparatus of the present invention, it is not necessary to change the rolls in accordance with the wave height shape of the corrugated plate material, which greatly affects the width widening efficiency.

Furthermore, since the length of the roll body is sufficiently larger than the width of the corrugated plate material, and the corrugated plate material does not come into contact with the end of the roll body, surface flaws that occur in the conventional method do not occur.

[0014] Furthermore, in order to obtain the above effects,
The apparatus is not limited to the apparatus configured as shown in FIG. 2, but may be an apparatus in which a plurality of roll groups are used as a cross mill as shown in FIG. 3, and a cross angle is set to form the roll gap shape.

On the other hand, as shown in FIG. 4, for example, a plurality of roll groups are constituted by a large-diameter roll 10 and a plurality of small-diameter rolls 11 disposed in the circumferential direction of the large-diameter roll 10 to form a roll gap shape. It may also be a device formed with

Furthermore, in order to improve the surface quality of the plate material after widening, rolling with slight reduction may be performed.

[0017]

【Example】

Example 1 A plate material having a thickness of 5 mm and a width of 1000 mm was rolled to a wave height of 12 mm by a rolling mill having slotted rolls 1a and 1b shown in FIG.
It was formed into a corrugated plate material with a wave length of 0 mm and a wave wavelength of 250 mm. Next, as shown in FIG. 5, the corrugated board material is subjected to a process of spreading the corrugations gradually from the center in the width direction to the ends using the apparatus of the present invention having three sets of rolls 12 to 14 arranged in the longitudinal direction. did. In addition, the three roll groups 12 to 14 have a body length of 1.
500mm, roll diameter 500mm, roll group 12 per radius of upper and lower roll crowns: 50mm, roll group 13
: 25 mm, roll group 14: 0 mm.

Example 2 Corrugation processing was performed in the same manner as in Example 1, and then three sets of rolls 15 to 1 were arranged in the longitudinal direction as shown in FIG.
Using the apparatus of the present invention using a cross mill as shown in FIG. 7, the waves of the corrugated board material were expanded gradually from the center in the width direction to the ends. The three roll groups 15 to 17 have flat roll crowns, body lengths of 1500 mm, and roll diameters of 500 mm.
Then, the cross angle θ is set to 12 degrees for roll group 15 and 16 degrees for roll group.
: 8.5 degrees, roll group 17: 0 degrees.

Example 3 Corrugation processing was performed in the same manner as in Example 1, and then, as shown in FIG. 7, a large diameter roll 18 and three small diameter rolls 19 to 20 were arranged in the circumferential direction of the large diameter roll 18. Using the apparatus of the present invention, the waves of the corrugated board material were expanded gradually from the central part in the width direction to the ends. In addition, large diameter roll 1
8 has a flat roll crown, body length 1500 mm, roll diameter 800 mm, and small diameter rolls 19 to 21 have a body length 1500 mm, roll diameter 200 mm, roll crown per radius small diameter roll 19: 100 mm, small diameter roll 20: 50 mm, small diameter roll 21:0 mm.

As a result of Examples 1, 2, and 3, it was possible to obtain a plate material whose width was increased by about 20%.

[0021]

According to the present invention, it is possible to obtain a high-quality plate with no surface flaws after widening, and a sufficient amount of widening at a practical cost.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an example of a roll gap shape used in the present invention.

FIG. 2 shows an embodiment of the invention.

FIG. 3 shows an embodiment of the invention.

FIG. 4 is a diagram showing an embodiment of the present invention.

FIG. 5 is a diagram showing an embodiment of the present invention.

FIG. 6 is a diagram showing an embodiment of the present invention.

FIG. 7 is a diagram showing an embodiment of the present invention.

FIG. 8 is a diagram showing an embodiment of the present invention.

FIG. 9 is a diagram showing an example of a roll for corrugating a plate material.

FIG. 10 is a diagram showing a conventional example of wave spreading processing.

FIG. 11 is a diagram showing a conventional example of wave spreading processing.

FIG. 12 is a diagram illustrating how force is applied when processing a corrugated plate material according to the prior art.

FIG. 13 is a diagram illustrating problems when performing a process of expanding the waves of a corrugated plate material according to the prior art.

[Explanation of symbols]

1a, 1b roll 2 plate materials 3a, 3b flat rolls 4a, 4b roll 5 rolling machine 6 metal plate width widening processing device 7
Surface flaw 8 Flat plate 9a, 9b Roll 10 Large diameter roll 11 Small diameter roll 12-17 Roll group 18 Large diameter roll 19-21 Small diameter roll

Claims (4)

[Claims] Claim 1: A device used in the process of widening the width of a corrugated metal plate or metal strip, which is composed of a plurality of roll groups arranged in the longitudinal direction, and the roll gap shape of the roll sets is narrower in the center. A metal sheet widening device characterized in that the end portions have a large and smooth shape, and the roll gap shape is arranged so that it gradually becomes a flat shape as it goes from the upstream side to the downstream side of the roll group. 2. The metal plate width widening apparatus according to claim 1, wherein the roll gap shape is formed by setting a roll crown of at least one of the upper and lower rolls in the plurality of roll groups arranged. 3. The metal plate width widening apparatus according to claim 1, wherein the plurality of roll groups arranged are cross mills, and a cross angle is set to form the roll gap shape. 4. The widening process of a metal sheet according to claim 1, wherein the plurality of roll groups are composed of a large diameter roll and a plurality of small diameter rolls arranged circumferentially of the large diameter roll. Device.