KR101118994B1 - Method of manufacturing expanded metal with concavo-convex pattern for grating - Google Patents

Abstract

The uneven pattern changes the cold image of the metal so far, which contributes to the improvement of the landscape, and also shows the anti-slip effect in any direction, and furthermore the expanded metal having the uneven pattern which contributes to the improvement of safety and its manufacturing method. To provide.

The first step of making a patterned steel sheet 43, which is provided with irregularities on the surface 43a of the rolling roll 221, is provided with an uneven pattern useful for preventing slipping on one side of the steel sheet, and after this first process, And a second step of making the expanded metal formed in the mesh shape with the uneven pattern by stretching the cut eye into the patterned steel sheet 43 and stretching the cut eye.

Expanded metal, mesh, irregularities, rolled roll, steel sheet, sliding, pattern, incision, notched

Description

METHOD OF MANUFACTURING EXPANDED METAL WITH CONCAVO-CONVEX PATTERN FOR GRATING}

BRIEF DESCRIPTION OF THE DRAWINGS One form of the manufacturing method of the expanded metal for grating of this invention is explanatory drawing of the 1st process of the manufacturing method.

FIG. 2 is an explanatory diagram of a second step of using the patterned steel sheet obtained in the first step as an expanded metal. FIG.

3 is an enlarged vertical cross-sectional view of the (a) pattern steel sheet, and (b) is a plan view thereof.

4 is a partially enlarged view of the expanded metal (a) having an uneven pattern, and (b) is seen from the line I-I of (a).

5 is an explanatory image diagram of an expanded metal having an uneven pattern.

6 is a partially enlarged view of the expanded metal of the prior art, (a) is a partial enlarged view of the expanded metal, (b) is a view seen from the II-II line (a).

<Description of the code>

221: rolled roll 223: transfer roll
43: patterned steel plate 43a: surface

431: convex portion 432: concave portion
51, 52: roller 61: lower blade
62: upper blade 62a: pregnant women

7: expanded metal with a pattern 71: strand

72: Bond O: Mesh (incision eye)
t ₁ : plate thickness touching concave portion t ₂ : height of convex portion
θ ₁ : Angle of inclination LW: Distance between centers of mesh's long eye direction

The present invention relates to a method for producing an expanded metal having an uneven pattern for grating that can be used as a grating.

Expanded metal (commonly known as expanded metal) is, “It is a net with a cut-out in a thin steel sheet. Used for bottom walls. Flat laths of rhombus eyes (diamond mesh), with ribs, bar laths welded with round bars of diameter 5 mm to flat laths [JIS A 5505]. Also, steel plates with a thickness of 6 to 13 mm are used for reinforcement of concrete. ”(Japanese" The Dictionary of Architecture Terms (2nd Edition) ", GIHODO SHUPPAN CO., Ltd., p. 74, ( 1995). The expanded metal is a metal plate in the form of a mesh, and exhibits a high anti-slip effect when used on a floor or the like.

In this regard, the applicant has already proposed an invention technique in which the expanded metal is applied to the grating (for example, Patent Document 1).

[Patent Document 1] Japanese Patent Application Laid-Open No. 7-189422

However, although the conventional expanded metal used in Patent Document 1 is effective in the direction of SW in Fig. 6, there is a problem that the direction of LW is slippery, especially when wet with water (first problem).

In addition, the expanded metal so far has been cut into a steel sheet made of metal with a smooth surface, stretched and processed into a mesh shape, so that the landscape feels a cold image (second problem).

Further, in the conventional expanded metal sheet, the slit is cut in a zigzag shape on the steel sheet, and then stretched and deformed in the direction perpendicular to the slit to form a mesh pattern. The steel plate part (bond 72 or strand 71) which forms an edge was twisted and the sharp unevenness | corrugation was formed. Since the angle (θ ₂ ) of the bond 72 and the portion of the strand 71 was severely erected, it would be as if the floor was ground when a person fell on it, and the result would be as if they were being ground by a steel sheet. (Third issue).

The present invention solves the above-mentioned problems, and the uneven pattern changes the cold image of the metal until now, contributing to the improvement of the landscape, and also exhibiting an anti-slip effect in any direction, and further contributing to the improvement of safety. An object of the present invention is to provide a method for producing expanded metal having a concave-convex pattern.

In order to achieve the above object, the gist of the invention as set forth in claim 1 is a rolling roll 221 related to the final finishing mill or a finishing rolling mill arranged immediately before the plurality of finishing rolling mills arranged in a plurality, and the projections with irregularities on the surface thereof. a by a transfer roll 223, Nancy, on one surface of the steel sheet, the convex portion 431 from the surface (43a) of the leaf (t ₁₎ the thickness reaches the recessed portion 432 is extended, and also when viewed from the longitudinal ( Y), lateral (X) all make a height (t ₂₎ is 0.2mm ~ 1.0mm pattern plate 43 of a pattern to be ohdoltodol the indentation pattern embossed in the range of each convex section 431 is set to less than 10mm A first step and a second step of making an expanded metal formed in a mesh shape with an uneven pattern by putting an incision eye in the patterned steel sheet 43 and stretching it after the first step; In the second process, both upward slopes of the strands 71 and the bonds 72 The angle θ ₁ is maintained in a range of 5 ° to 40 °, and these are held in a state in which the strands 71 are rounded to a circular fan shape, thereby forming an expanded metal formed in the mesh shape. The present invention relates to a method for producing an expanded metal having an uneven pattern for grating.

The manufacturing method of the expanded metal which has the uneven | corrugated pattern for grating of Claim 2 is the lower edge 61 and the upper edge | tip of Claim 1 which made the patterned steel plate 43 so that the uneven | corrugated surface 43a may become lower side. 62, and then the lower surface side lowers the upper blade 62 formed in a wave form at the peak portion 62a and the valley portion 62b, and the patterned steel plate is formed at the peak portion 62a of the wave shape of the upper blade 62. The incision is put into the 43, and the contact portion of the peak 62a is stretched, and then the lowered upper blade 62 is raised, and then the lower blade 61 and the upper blade are moved by the rollers 51 and 52. While the patterned steel plate 43 is sent in between the 62, the upper blade 62 is laterally moved to stop at a time when it is moved by 1/2 of the distance LW between the centers of the mesh O in the long eye direction. After that, the upper blade 62 is lowered so that the cutout is inserted into the patterned steel plate 43 at the corrugated peak portion 62a of the upper blade 62, and the contact portion of the peak portion 62a is stretched. In this way, the patterned steel sheet 43 is characterized in that the zigzag cut-out (O) is put and stretched.

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As in the invention of claim 1, when an incision is inserted into a patterned steel sheet having an uneven pattern on one side of the steel sheet and stretched to form a mesh shape, an expanded metal having an uneven pattern with an uneven pattern is completed. As a result, the effect of slipping in any direction due to the irregularities is obtained. And by this uneven | corrugated pattern, the cold image which a metal of the past has had is eliminated.

When both the inclined angles (θ ₁ ) of the strands and bonds are maintained in the range of 5 ° to 40 ° and formed into a mesh shape, the strands and bonds are in a divided state. If used, a person can fall over this to avoid injury.
In particular, the convex portion 431 protrudes from one surface of the steel sheet in the first step from the surface 43a of the plate thickness t ₁ that touches the concave portion 432, and the plane Y is viewed in plan view. , Patterned steel plate 43 having an uneven pattern useful for preventing slipping, in which the height t ₂ of each convex portion 431 set to 10 mm or less in both sides (X) is in a range of 0.2 mm to 1.0 mm. When this is made, not only a soft landscape with an uneven pattern can be obtained, but also an uneven pattern can be arranged densely, and a coefficient of friction can be increased, so that a more anti-slip effect can be expected. Here, a known striped steel sheet can be used, and a striped steel sheet can be used in which the uneven pattern of the stripe is raised. However, since the length of the long direction of the striped eye is large, it is prevented from slipping when the expanded metal having the uneven pattern is formed. As a satisfactory effect is not obtained, the anti-slip function is far superior to the uneven patterned steel sheet.
In addition, in the second process, the two upwardly inclined angles θ _{1 of the} strands 71 and the bonds 72 are maintained in a range of 5 ° to 40 °, and these are held in a state where each strand 71 is rounded. When the expanded metal formed in the mesh shape is made in the shape of a fan, the strand is in a state of being laid down. Therefore, even if a person falls on the floor, he / she does not hurt his hand and is excellent in terms of safety. . Moreover, since each strand 71 is only a fan shape, this round shape is also excellent in safety. In addition, staying in a gentle fan shape gives the product an outstanding image. In addition, the bumpy convex and concave pattern is added to give the product a soft atmosphere, which is effective.
As in the invention of claim 2, the patterned steel sheet 43 is introduced between the lower blade 61 and the upper blade 62 with the uneven patterned surface 43a on the lower side, and then the lower surface side is the peak portion 62a. ), The upper blade 62 formed in a wave shape at the valley portion 62b is lowered, and an incision is put into the patterned steel plate 43 at the curved part 62a of the upper blade 62, and the When the abutted portion is stretched to produce an expanded metal having a grooving concave-convex pattern, the concave-convex surface 43a is on the lower side, so that the concave-convex pattern may deform when the upper blade 62 is lowered. There is no concern.

Hereinafter, a manufacturing method of the expanded metal having a concave-convex pattern for grating according to the present invention (hereinafter, simply referred to as a 'manufacturing method of expanded metal having a concave-convex pattern') will be described in detail. 1-5 is one form of the expanded metal manufacturing method of this invention, FIG. 1 is the 1st process drawing, FIG. 2 is the 2nd process which makes the patterned steel plate obtained by the 1st process into expanded metal. Fig. 3 is a longitudinal sectional enlarged view of (a) temporary pattern steel sheet, and (b) is a plan view thereof. 4 is a partially enlarged view of an expanded metal having an uneven pattern, and FIG. 5 is an explanatory image diagram of an expanded metal having an uneven pattern.

(1) Manufacturing method of expanded metal having an uneven pattern

The manufacturing method of the expanded metal 7 having an uneven pattern includes a first step and a second step. The first process is a manufacturing process of making a patterned steel sheet 43 with a concave-convex pattern useful for preventing slipping on one surface of the steel sheet by giving a notched notch on the surface of one of the rolled rolls 221.

For example, the slab surface scratches are scarped by an oxygen-acetylene flame (or propane flame), and the slab 41 is heated in the heating furnace 1 as shown in the schematic process diagram of FIG. Subsequently, the slab 41 taken out from the heating furnace 1 is rolled and rolled in the roughing mill 21, and the rolled process board 42 is rolled to the standard dimension by the finishing mill 22. In the finish rolling mill 22, a plurality of four-stage rolling mills 22a to 22d are arranged in series, and the process plate 42 is passed between the rolling rolls 221 and rolled, and gradually the interval between the rolling rolls 221 is gradually increased. By narrowing, it forms in the rolled plate of a predetermined dimension.

Here, the upper rolling roll 221 of the last finishing mill 22d (or the finishing rolling mill 22c arranged immediately before) among the plurality of finishing rolling mills 22a to 22d arranged thereon is a transfer having an uneven pattern on its surface. The roll 223 is used to finish a patterned steel sheet 43 having a concave-convex pattern useful for preventing slipping on one surface of the steel sheet. On the surface 43a of the rolled steel plate after passing the finish rolling mill 22, the convex part 431 and the recessed part 432 become the patterned steel plate 43 formed like the enlarged view in the circle of FIG. Thereafter, the roller 31 is passed between the hot straighteners 3 arranged in a zigzag manner, and the roller 31 is straightened with a flat patterned steel sheet 43. Since the calibrated patterned steel sheet 43 is high temperature, it cools and cut | disconnects to the magnitude | size of a specification, and makes the patterned steel plate 43 which a desired uneven | corrugated pattern is raised.

The patterned steel plate 43 with which the uneven | corrugated pattern of this embodiment is raised is finished by the soft pattern of a soft feeling as shown in the enlarged view of the circle | round | yen of FIG. As shown in Fig. 3 (a), the convex portions 431 protrude to the height t ₂ from the surface 43a of the thickness t ₁ corresponding to the recessed portions 432, as shown in Fig. 3 (a). Form a pattern. For expanded metal exhibiting an anti-slip function, the height t ₂ of the convex portion 431 is in the range of 0.2 mm to 1.0 mm, more preferably 0.4 mm to 0.6 mm. As shown in FIG. 3B, the size of the vertical Y and the horizontal X of each convex portion 431 is not particularly limited, but the vertical Y and the horizontal X are both 10 mm or less. It is preferable to set, and it is more preferable to set it as 5 mm or less. This is because when the thickness is set to 10 mm or less, and further 5 mm or less, not only a soft landscape with an uneven pattern can be obtained, but also irregular patterns can be arranged densely, and the coefficient of friction is increased, so that a more slip preventing effect can be expected. The patterned steel plate 43 here uses the patterned steel plate of NAKAYAMA STEEL WORKS, LTD. The thickness of the patterned steel sheet 43 includes 3 mm, 4.5 mm, 6 mm, 9 mm, and the like. In this embodiment, the patterned steel sheet 43 having a thickness of 4.5 mm is adopted to expand the metal sheet 43 having an uneven pattern. )

Here, the patterned steel sheet 43 may use, for example, a known striped steel sheet instead of the patterned steel sheet of the pattern. The stripe steel sheet is also made of a stripe patterned steel sheet 43, which has irregularities on the surface of the rolling roll 221, and is formed with stripe irregularities in the form of stripes useful for preventing slipping on one side of the steel sheet. This stripe steel sheet has a larger friction coefficient than the flat steel sheet and can be used as the expanded steel sheet 43 for expanded metal. However, since the length of the striped eye in the long direction is larger than 30 mm, a satisfactory effect is not obtained as an anti-slip when the expanded metal having an uneven pattern is obtained, and the anti-slip function is an uneven patterned steel sheet 43. The side is much better. The coefficient of friction under the disc state is 0.781μ in the flat steel plate, while 0.774μ in the striped steel plate, and 0.812μ in the patterned steel plate 43 which is bumpy. In addition, the coefficient of friction under the watering condition is 0.338μ in flat steel plate, while 0.370μ in striped steel plate, and 0.617μ in patterned steel plate 43 (extracted from the steel sheet catalog of Nakayama Seiko Sho). Even when it becomes an expanded metal, since the surface shape of the unevenness | corrugation remains almost intact, the patterned steel plate 43 which becomes bumpy is more suitable.

A 2nd process is a manufacturing process which makes expanded metal formed in mesh shape with uneven | corrugated pattern by putting an incision eye in the patterned steel plate 43 obtained by the said 1st process, and stretching it. The patterned steel sheet 43 obtained in the first step is processed into a mesh shape by, for example, a known expanded metal manufacturer as shown in FIG. In Fig. 2, reference numerals 51 and 52 denote rollers for conveying steel plates, and reference numerals 61 and 62 denote fixed lower blades 61 and movable upper blades 62 arranged in front thereof. The lower edge side widens the upper blade 62 and the fixed lower blade 61, which are formed in a wave shape by the peak portion 62a and the valley portion 62b, by a predetermined pitch width, and furthermore, the steel plates are fixed by the rollers 51 and 52. The mesh O is formed by sequentially feeding the blade 61 provided with the 61 and the movable upper blade 62 inward.

Here, as a material to be introduced to a known expanded metal manufacturing machine as shown in Figure 2, the present invention, unlike the conventional flat steel plate by using the patterned steel plate 43 is raised by the uneven pattern by having an uneven pattern Finished with padded metal (7). Specifically, in Fig. 2 (a), first, the concave-convex surface 43a of the patterned steel sheet 43 is placed upward, and the rollers 51 and 52 are inserted into the positions of the lower blade 61 and the upper blade 62. The upper blade 62 is then lowered. By the lowering of the upper blade 62, the corrugated peak portion 62a of the upper edge 62 inserts the cut eye into the patterned steel plate 43, and further extends the contact portion of the peak portion 62a. Next, the lowered upper blade 62 is raised (b in FIG. 2). Then, a new patterned steel sheet 43 is introduced between the lower blade 61 and the upper blade 62 by the rollers 51 and 52, and the upper blade 62 is laterally moved back and forth with each other (Fig. 2). . The lateral movement of the upper blade 62 stops at a time point moved by 1/2 of the distance LW in the long eye direction of the mesh O shown in FIG. 4 (D in FIG. 2). Subsequently, the upper blade 62 is lowered, and the corrugated hill portion 62a of the upper blade 62 is cut into the patterned steel plate 43 so as to further stretch the abutment portion of the hill portion 62a. Since the position of the upper blade 62 is moved by 1/2 of the distance LW between the centers of the long eye direction of the mesh, the zigzag cut eyes O are formed on the patterned steel sheet 43. By repeating the working steps of FIGS. 2A to 2D, the expanded metal 7 having an uneven pattern can be formed. Meanwhile, in order to make the description easy to understand, in FIG. 2, the uneven patterned surface 43a of the patterned steel sheet 43 is upward, but the uneven pattern is deformed when the upper edge 62 is pressed downward toward the patterned steel sheet 43. It is preferable that the surface 43a with the concave-convex pattern should be on the lower side because it may be.

In the present embodiment, in the manufacture of the expanded metal 7 having the uneven pattern, the conveying width, ie, the pitch width W, through which the patterned steel sheet 43 is introduced into the rollers 51 and 52 is taken larger than that of the conventional art. The angle of the strand 71 and the bond 72 of the expanded metal can be pushed down compared with the conventional one. The strand 71 refers to the thin portion of the mesh, and the bond 72 refers to the intersecting thick portion of the mesh. If the conventional product has a long eye center distance LW of the mesh of 30.5 mm and a short distance center SW of the mesh of 12 mm, the pitch width W _{2 of the} standard type is 1.5 mm, In the product of this embodiment, the pitch width W ₁ is large (the pitch width W ₁ here is 4 mm to 5 mm), and the angles θ ₁ of the strands 71 and the bonds 72 are pressed. While the upward inclination angle θ ₂ of the conventional product is about 60 ° as shown in FIG. 6 (b), the strands 71 and the bonds 72 of the expanded metal 7 having the uneven pattern are present. The two upward inclination angles θ ₁ are set in the range of 5 ° to 40 °, more preferably in the range of 15 ° to 35 °, as shown in Fig. 4B. The expanded metal 7 having the uneven pattern has a small upward inclination angle θ ₁ of the strands 71 and the bonds 72, and becomes a state in which the strands 71 and the bonds 72 are pressed. If a person falls on it, he can't hurt his hand on the floor. Expanded metal (7) with the desired concave-convex pattern, which is also considered for safety, is made. Since the pitch width W is taken to be larger than that of the prior art, an expanded metal 7 having an uneven pattern with improved durability is made (FIGS. 4 and 5). On the other hand, the expanded metal 7 with the concave-convex pattern shown in Fig. 6 has been subjected to silver plating coating on its surface.

(2) Expanded metal with irregularities

For example, the expanded metal 7 having a concave-convex pattern made by using the above-mentioned manufacturing method is a concave-convex formed in a mesh shape by putting an incision eye into a patterned steel sheet 43 having a concave-convex pattern on one side of the steel sheet. Expanded metal with pattern (7).

An uneven pattern of irregularities is formed on the surface 43a of the expanded metal 7 having an uneven pattern, and the height of the convex portion 431 from the substrate surface 43a corresponding to the concave portion 432 (t _2). ) Is 0.2 mm to 1.0 mm, more preferably 0.4 mm to 0.6 mm. In addition, the size of the length Y and the width X of each irregular pattern is set to 10 mm or less and 5 mm or less as a more preferable numerical value. Therefore, when used for the grating, the irregularities of the uneven pattern exhibit a non-slip function, and are suited to the expanded metal 7 having the uneven pattern for grating.

In addition, the expanded metal 7 having a concave-convex pattern has a mesh O formed by the strands 71 and the bonds 72, and the upward angle of inclination (θ) of the strands 71 and the bonds 72 is formed. ₁ ) is formed in the range of 5 ° to 40 °. The lower limit of 5 ° here means that when the upward inclination angle is smaller than 5 °, the expanded metal is excessively squeezed, and the eye of the mesh O is too small to sufficiently obtain the advantages of the expanded metal. Because it will not lose. For example, as the eye of the mesh O becomes smaller, the weight increases, and the aesthetics also decreases. Moreover, when used as a grating etc., the problem that a drainage worsens also arises. On the other hand, when the upper inclination angle exceeds 40 °, on the other hand, the degree of expansion of the slit is increased and the strands 71 are greatly twisted as in the prior art, such that when a person is used for grating, for example, the person falls down thereon. This is because there is a risk of being injured, such as pushing with a steel sheet. The more preferable range of both upward inclination angles of the strand 71 and the bond 72 is 15 degrees-35 degrees. When the strands 71 and the bond 72 are in the state of the leakage of this range, even if a person falls on the floor and lays the floor, the strands 71 and the bond 72 are hardly cut by the strands 71 or the bond 72.

The expanded metal 7 having the uneven pattern of the present embodiment has a large pitch width W, and the angles of upward upward inclination of the strands 71 and the bonds 72 are 5 ° to 40 ° (a more preferable range is 15 ° to 35 °), which also leads to a condition that suppresses the expansion of the mesh in the middle. In the prior art, as shown in FIG. 6, the strands 71 are expanded as much as possible to form an acute lozenge, and further, the twisted strands 71 are close to the standing state to form steep irregularities. On the other hand, as for the product of this embodiment, as shown in FIGS. 4 and 5, each strand 71 is just a fan shape immediately before a lozenge, and this round shape is also excellent in terms of safety. In addition, staying in a gentle mountain fan before the lozenge, as shown in Figs. 4 and 5, creates a soft image of the product.

(3) effect

According to the manufacturing method of the expanded metal which has the uneven | corrugated pattern for gratings comprised in this way, the uneven | corrugated pattern formed in the surface 43a exhibits an anti-slip effect. The conventional expanded metal has a problem of slipping in the direction of LW and slipping, especially when wet, but this is eliminated by the formation of the uneven pattern on the surface 43a. In particular, when the expanded metal 7 having the uneven pattern with the uneven pattern of the uneven pattern as in the present embodiment is used, the coefficient of friction becomes large, thereby enabling more power to be exerted (first effect).

In addition, when the expanded metal 7 has an uneven pattern of irregularities, the cold feeling of the metal of the steel sheet is eliminated by the unevenness of the irregular patterns, which gives an appearance that is soft and soft to the surface. The landscape makes you feel at ease (second effect). The conventional product was only processed by a flat steel plate, thus giving a scenic cold image. On the other hand, the expanded metal 7 having the concave-convex pattern changes its image by entering a pattern, and can be used not only for sliding applications but also for landscape products such as fences, thereby contributing to the expansion of the applications.

Furthermore, since the strands 71 and the bonds 72 are in a state of being laid down, even if a person falls on the floor, the hands are not damaged. It is very excellent in terms of safety (third effect). It is made of safe, non-slip expanded metal that is soft to humans. The conventional expanded metal cuts the slit in a zigzag form on the steel sheet, and then stretches the steel sheet in the direction orthogonal to the slit as much as possible to form a mesh pattern close to a lozenge, thereby creating an acute mesh (O). In addition, when the strand 71 and the bond 72 constituting the edge thereof is twisted according to expansion, the upward inclination angle θ ₂ forms a steep angle, and when used for grating, there is anxiety in terms of safety. In the expanded metal 7 having the uneven pattern, such anxiety is removed because the strands 71 and the bonds 72 are pressed. In addition, the meshes 0 formed by the strands 71 and the bonds 72 stay in the state immediately before the lozenge and are rounded in a fan shape, and are excellent in safety. Staying in the gentle mountain fan shape just before the lozenge adds a bumpy bumpy pattern, which gives the product a softer atmosphere.

The expanded metal 7 with the uneven pattern not only exhibits an anti-slip function not found in the conventional expanded metal, but also contributes to improved aesthetics and improved safety, making it suitable for grating. Unlike conventional expanded metal, there is no case that the vehicle tires traveling thereon are unnecessarily worn. In addition, it can be used in a wide range of fields such as fences, scaffolds, especially rollercoaster check scaffolds such as steel towers, bridges, and amusement parks, three-dimensional parking lots, and car transporting cars, which is very advantageous in terms of expanding its use.

In addition, in this invention, it is not limited to what was shown to the said embodiment, It can variously change in the range of this invention according to the objective and a use. Heating furnace 1, rolling mill, rolling roller, patterned steel sheet 43, convex portion 431, concave portion 432, feed roller, lower blade 61, upper blade 62, strand 71, bond ( 72) shape, size, number, material, etc. can be appropriately selected depending on the intended use. For example, the second step may be one made of a method for producing expanded metal such as Japanese Patent Application Laid-open No. Hei 11-10250 and Japanese Patent Application Laid-open No. Hei 8-135127. In addition to patent document 1, it can apply to the grating etc. of Unexamined-Japanese-Patent No. 2006-2425.

The manufacturing method of the expanded metal having the uneven pattern for grating of the present invention exhibits an anti-slip effect in any direction, and is safe even if a person falls when used in grating or the like. This changes the cold image of the metal and contributes to the improvement of the landscape.

Claims (3)

On one side of the steel sheet, a rolling roll 221 related to the last finishing mill or a finishing rolling mill arranged immediately before the plurality of finishing rolling mills is used as a transfer roll 223 having a notch on the surface thereof. The convex portions 431 protrude from the surface 43a of the plate thickness t ₁ touching the concave portion 432, and each convex portion whose length Y and the horizontal X are set to 10 mm or less in plan view. A first step of making a patterned steel sheet 43 with an uneven pattern in which the height t ₂ of 431 is in a range of 0.2 mm to 1.0 mm, and after the first step, the patterned steel sheet 43 And a second step of making the expanded metal that is formed into a mesh shape with an uneven pattern by stretching the incision eye and stretching it), and in this second step, the amount of the strands 71 and the bonds 72 The upward inclination angle θ ₁ is kept within a range of 5 ° to 40 °, and these are held in a state of being pressed. In addition, each strand (71) is a rounded fan-shaped, making the expanded metal formed in the mesh shape to form an expanded metal having a grooving concave-convex, characterized in that. The patterned steel sheet 43 is introduced between the lower blade 61 and the upper blade 62 with the uneven patterned surface 43a on the lower side, and then the lower surface side is the peak portion 62a. ), The upper blade 62 formed in a wave shape at the valley portion 62b is lowered, and an incision is put into the patterned steel plate 43 at the curved part 62a of the upper blade 62, and the After the abutting portion is stretched, the lowered upper blade 62 is raised, and then the patterned steel sheet 43 is introduced between the lower blade 61 and the upper blade 62 by rollers 51 and 52, , The upper edge 62 is laterally moved to stop at a time point moved by 1/2 of the inter-center distance LW in the long eye direction of the mesh O. Then, the upper edge 62 is lowered, and the upper edge 62 The cutout is inserted into the patterned steel sheet 43 at the corrugated peak portion 62a, and the contact portion of the peak portion 62a is stretched. In turn, the zigzag-shaped cutout O is patterned on the patterned steel sheet 43. Put) and hold The manufacturing method of expanded metal with the uneven | corrugated pattern for grating characterized by extending. delete

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