JP4879609B2 - Manufacturing method of expanded metal with uneven pattern for grating - Google Patents

Description

The present invention relates to manufacturing method of the grating for uneven patterned expanded Metall that can be used in Gurechin grayed.

Expanded metal (commonly known as expanded metal) is “a thin steel plate with a cut and stretched into a net. Used for painted walls. There are flat laces with diamonds (diamond mesh), ribs, and burlas in which a round bar with a diameter of 5 mm is welded to the flat lath [JIS A 5505]. Moreover, what was made from the steel plate of thickness 6-13mm is used for reinforcement of concrete. ("Architecture Dictionary (Second Edition)", Gihodo, p. 74, (1995)). This expanded metal is a mesh-like metal plate and exhibits a high anti-slip effect when used on a floor surface or the like.
For this reason, the present applicant has already proposed an invention technique in which the expanded metal is applied to grating (for example, Patent Document 1).

JP-A-7-189422

However, the conventional expanded metal used in Patent Document 1 is effective in the SW direction in FIG. 6, but the LW direction has a problem that it becomes slippery particularly when wet with water (No. 1). Problem 1).
In addition, the conventional expanded metal was cut and stretched into a metal steel plate with a smooth surface and processed into a mesh shape, so that the landscape felt a cold image to see (second problem) ).
Furthermore, the conventional expanded metal is a plate material in which a slit is cut in a zigzag pattern in a steel plate, and then this steel plate is stretched and deformed in a direction perpendicular to the slit to create a mesh pattern. The steel plate portion (bond 72 and strand 71) was twisted to form steep irregularities. Since the angle θ ₂ of the portion of the bond 72 and strand 71 stood strongly, event, there was a problem becomes the same result as the cut in the grater When you have or with the hand when the people on it to overturn the ( Third problem).

The present invention solves the above-mentioned problems, the uneven image changes the cold image of the metal so far, contributes to the improvement of the landscape, exhibits an anti-slip effect in any direction, and further safety an object of the present invention is to provide a grating for the uneven pattern with extract bread manufacturing method of the dead meta Le also contribute to the improvement.

In order to achieve the above object, the gist of the invention described in claim 1 is that the final finish rolling mill among the finish rolling mills arranged in a plurality, or the rolling roll (221) according to the finishing rolling mill arranged in front of the final rolling mill. the), as a transfer roll scored there is unevenness on the surface of its (223), on one surface of the steel sheet, the convex portions from the surface (43a) of the plate thickness corresponding to the recess (432) (t ₁₎ (431) projects In addition, a concavo-convex pattern appears in which the height (t ₂ ) of each convex portion (431) set to 10 mm or less in both vertical (Y) and horizontal (X) in plan view is in the range of 0.2 mm to 1.0 mm. a first step of making a pattern steel plate (43) of the satin finish, after the first step, expanded formed in a mesh shape left with uneven pattern by stretching scored in the pattern steel plate (43) comprising a second step of making a metal, and in addition the second step, the strands (71)及In a state laid these I both upward inclination angle (theta ₁₎ the coercive in the range of 5 ° to 40 ° of the bond (72), and in that each strand (71) is kept in a fan shape with rounded , in grating for uneven textured method for producing expanded metal, characterized in that to produce the expanded metal formed into the mesh shape.
The manufacturing method of the expanded metal with the uneven pattern for grating according to claim 2 is the method according to claim 1, wherein the patterned steel plate (43) is formed so that the surface (43a) having the uneven pattern faces downward. ), And between the upper blades (62), and then the upper blade (62), whose lower surface side is formed in a wave shape with a peak portion (62a) and a trough portion (62b), is lowered, and the upper blade (62 ), The pattern steel plate (43) is cut at the wavy crest (62a), the contact portion of the crest (62a) is further stretched, and then the lowered upper blade (62) is raised, The patterned steel plate (43) is fed between the lower blade (61) and the upper blade (62) by the rollers (51) and (52), and the upper blade (62) is moved laterally to move the mesh (O) in the long direction. It stops when it has moved by half the center-to-center distance (LW), and then the upper blade (62) is lowered, and the wavy peak (62a) of the upper blade (62) is applied to the patterned steel plate (43). Break Put further so as to stretch the contact portion of the crests (62a), sequentially, and wherein the stretching placed staggered cuts (O) to the pattern steel plate (43).

As in the first aspect of the present invention, an expanded pattern having a concavo-convex pattern with a concavo-convex pattern still attached to a patterned steel sheet provided with a concavo-convex pattern on one side of the steel sheet. Dead metal is formed, and a non-slip effect can be obtained in any direction due to unevenness. And this relief pattern softens, and the cold image of the metal so far is wiped away.
When scan Portland and both upward inclination angle theta ₁ of the bond kept in the range of 5 ° to 40 ° is formed in a mesh shape, since the state of strands and bonds have been laid, the unevenness patterned expanded When metal is used for grating etc., even if a person falls on this, he can escape from injury.
In particular, the convex portion (431) protrudes from the surface (43a) of the plate thickness (t ₁ ) corresponding to the concave portion (432) on one side of the steel plate in the first step , and both the vertical (Y) and horizontal (X) in plan view. height (t ₂₎ is patterned steel satin finish stand out is uneven pattern to help slip in the range of 0.2 mm to 1.0 mm (43) is made of each convex section (431) that is set to 10mm or less In addition to providing a soft texture with a satin pattern, it is possible to arrange finely uneven patterns, increasing the coefficient of friction and further anti-slip effect. Here, using a known striped steel plate, it is possible to adopt a striped patterned steel plate in which a striped uneven pattern emerges, but when the expanded metal with a concave and convex pattern is formed because the length in the longitudinal direction of the stripe is large A satisfactorily anti-slip effect cannot be obtained, and the anti-slip function is more excellent with a textured steel plate.
Further, in the second step, both upward inclination angles (θ ₁ ) of the strand (71) and the bond (72) are kept in the range of 5 ° to 40 °, and the strands (71) are laid down. If you make the expanded metal formed in the mesh shape so that it can be kept in a rounded fan shape, it is in a state where the strands are laid down, so if a person falls over it, Even if you do not hurt your hands, it will be extremely safe. Furthermore, since each strand 71 stays in a fan shape, this rounded shape is also excellent from the viewpoint of safety. In addition, the strand staying in a gentle fan shape creates a product-friendly image. In addition, the textured texture of the satin is added to give a more relaxing atmosphere to the product.
As in the invention of claim 2, the patterned steel plate (43) is fed between the lower blade (61) and the upper blade (62) so that the uneven surface (43a) is on the lower side, The upper blade (62) whose lower surface side is formed in a wave shape by a peak portion (62a) and a valley portion (62b) is lowered, and a patterned steel plate (43) is formed by the wavy peak portion (62a) of the upper blade (62). When the expanded metal with an uneven pattern for grating is manufactured by extending the contact part of the mountain part (62a) and further making the uneven surface (43a) on the lower side, There is no possibility that the concavo-convex pattern is deformed when the upper blade (62) is lowered.

Manufacturing method of grating for the uneven pattern with expanded meta-le of the present invention, exhibits also non-slip effect on any of the direction, and also to overturn the person in the case of using the grating, such as a safe, Furthermore, the rugged pattern changes the cold image of the metal so far, and has great effects such as contributing to the improvement of the landscape.

Below, manufacturing method of grating for the uneven pattern with expanded meta-le according to the present invention (hereinafter, simply referred to as "manufacturing method of uneven pattern with expanded metal".) Will be described in detail. 1 to 5 in a form of concavo-convex patterned expanded Metall manufacturing method of the present invention, FIG. 1 is a first process diagram thereof, FIG 2 is expandettes de de patterns steel sheet obtained in the first step FIG. 3A is an enlarged longitudinal sectional view of a patterned steel plate, and FIG. 3B is a plan view thereof. FIG. 4 is a partially enlarged view of the expanded metal with a concavo-convex pattern, and FIG. 5 is an explanatory image diagram of the expanded metal with a concavo-convex pattern.

(1) Manufacturing method of expanded metal with concavo-convex pattern The manufacturing method of expanded metal 7 with concavo-convex pattern includes a first step and a second step. The first step is a manufacturing step for producing a patterned steel plate 43 in which a concave and convex pattern useful for preventing slipping is raised on one surface of the steel plate by making a notch having a concave and convex surface on one surface 223 of the rolling roll 221.
For example, slab surface scratches are scarfed with 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 tentered and rolled by the roughing mill 21, and the in-process plate 42 that has been tentered and rolled 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 work plate 42 is passed between the rolling rolls 221 and rolled. The rolling mill 221 is predetermined by gradually narrowing the interval between the rolling rolls 221. It is formed into a rolled plate of the size.
Here, the upper rolling roll 221 of the final finishing mill 22d (or the finishing rolling mill 22c arranged in front of the finishing rolling mills 22a to 22d) arranged in a plurality is provided with dents and recesses on the surface thereof. The transfer roll 223 is used so that a patterned steel plate 43 having a concavo-convex pattern useful for preventing slippage on one side of the steel plate is formed. On the surface 43a of the rolled steel sheet after passing through the finish rolling mill 22, a patterned steel plate 43 is formed with convex portions 431 and concave portions 432 as shown in the enlarged view in the circle of FIG. Thereafter, the roller 31 is straightened to the flat patterned steel plate 43 through the hot straightening machines 3 in a staggered arrangement. Since the corrected patterned steel plate 43 is at a high temperature, it is cooled and cut to a standard size, and the patterned steel plate 43 from which a desired uneven pattern is raised is produced.

The patterned steel plate 43 from which the concavo-convex pattern of the present embodiment emerges is finished in a satin pattern with a soft feeling as shown in the enlarged view in a circle of FIG. Each pattern like body as shown in FIG. 3 (b), protrudes the convex portion 431 is the height t ₂ from the surface 43a of the plate thickness t ₁ corresponding to the recess 432 to form a satin finish. The expanded for the metal which exhibits a non-slip function, height _{t 2} of the convex portion 431 0.2mm~1.0mm, more preferably in the range of 0.4mm~0.6mm. As shown in FIG. 3 (b), the vertical Y and horizontal X sizes of the convex portions 431 are not particularly limited, but it is preferable to set both the vertical Y and horizontal X to 10 mm or less, and more preferably 5 mm or less. preferable. If it is set to 10 mm or less, and further 5 mm or less, not only a soft texture with a satin pattern can be obtained, but also fine uneven patterns can be arranged, and the friction coefficient increases and a further anti-slip effect can be expected. It is. The patterned steel plate 43 used here is a textured steel plate from Nakayama Steel Co., Ltd. There are 3 mm, 4.5 mm, 6 mm, 9 mm, and the like in the thickness of the patterned steel plate 43. In this embodiment, the patterned steel plate 43 having a thickness of 4.5 mm is adopted, and this is used as the expanded metal 7 with the uneven pattern. .

  Here, the patterned steel plate 43 may be a known striped steel plate, for example, instead of the textured steel plate. The striped steel plate is also made into a striped patterned steel plate 43 in which a notched surface is formed on the surface of the rolling roll 221 and a striped uneven pattern that is useful for preventing slippage appears on one side of the steel plate. The striped steel plate has a larger coefficient of friction than the flat steel plate and can be used as the patterned steel plate 43 for the expanded metal. However, since the length of the stripes in the longitudinal direction is as large as 30 mm or more, an expanded metal with a concavo-convex pattern does not provide a satisfactory effect as a non-slip, and the anti-slip function of the textured steel plate 43 Is much better. The friction coefficient under the condition of the original plate is 0.781 μ for the flat steel plate, 0.774 μ for the striped steel plate, and 0.812 μ for the textured steel plate 43. Furthermore, the coefficient of friction under submerged conditions is 0.338μ for flat steel sheets, 0.370μ for striped steel sheets, and 0.617μ for textured steel sheets 43 (steel sheet catalog of Nakayama Steel Co., Ltd.). (Excerpt) Even when the expanded metal is formed, the uneven surface shape remains almost as it is, so that the textured steel plate 43 is more suitable.

  The second step is a manufacturing step for producing an expanded metal that is formed in a mesh shape with a concavo-convex pattern by cutting and stretching the patterned steel plate 43 obtained in the first step. The patterned steel plate 43 obtained in the first step is processed into a mesh shape by a known expanded metal manufacturing machine as shown in FIG. In FIG. 2, reference numerals 51 and 52 denote steel sheet feeding rollers, and reference numerals 61 and 62 denote a fixed lower blade 61 and a movable upper blade 62 arranged in front of the rollers. The upper blade 62 whose lower surface side is formed in a wave shape by the peak portion 62a and the valley portion 62b widens only a predetermined step width with the fixed lower blade 61, and further, the steel plate is movable with the fixed lower blade 61 by the rollers 51 and 52. The mesh O is formed by sequentially feeding toward the blade mold having the blade 62.

  Here, as a material to be fed to a known expanded metal manufacturing machine as shown in FIG. 2, the present invention is different from a conventional flat steel plate, and by using the patterned steel plate 43 on which the concave and convex pattern is raised, the expanded with concave and convex pattern is used. Finish with metal 7. Specifically, in FIG. 2 (a), first, the surface 43a of the patterned steel plate 43 with the concavo-convex pattern is placed on the upper side, and the rollers 51 and 52 are fed to the positions of the lower blade 61 and the upper blade 62, and then the upper blade 62 is moved. Lower. By the lowering of the upper blade 62, the wavy crest 62a of the upper blade 62 cuts the patterned steel plate 43, and the contact portion of the crest 62a is further extended. Next, the lowered upper blade 62 is raised (B in FIG. 2). Thereafter, a new patterned steel plate 43 is fed between the lower blade 61 and the upper blade 62 by the rollers 51 and 52, and the upper blade 62 is moved laterally in parallel with this (FIG. 2C). The lateral movement of the upper blade 62 stops when it has moved by half the center-to-center distance LW in the long direction of the mesh O shown in FIG. 4 (D in FIG. 2). Subsequently, the upper blade 62 is lowered, and the wavy crest 62a of the upper blade 62 cuts the patterned steel plate 43 so that the contact portion of the crest 62a is further extended. Since the position of the upper blade 62 has moved by a half of the center-to-center distance LW in the long direction of the mesh, staggered cuts O are formed in the patterned steel plate 43. The expanded metal 7 with a concavo-convex pattern can be produced by repeating such work steps shown in FIGS. In order to make the explanation easy to understand, in FIG. 2, the surface 43 a having the concavo-convex pattern of the patterned steel plate 43 is placed on the upper side, but the concavo-convex pattern may be deformed when the upper blade 62 is pressed downward toward the patterned steel plate 43. Therefore, it is preferable that the surface 43a with the uneven pattern is on the lower side.

In the present embodiment, when the expanded metal 7 with the uneven pattern is manufactured, the feed width in which the patterned steel plate 43 is fed by the rollers 51 and 52, that is, the step width W is set larger than the conventional product, and the expanded metal 7 is expanded than the conventional product. The angle of the metal strand 71 and the bond 72 is made to lie down. The strand 71 is a thin portion of the mesh, and the bond 72 is a thick portion where the mesh intersects. When the conventional product has a mesh center distance LW of 30.5 mm and a mesh mesh center distance SW of 12 mm, the standard type has a step width W ₂ of 1.5 mm. In the embodiment product, the step width W ₁ is set large (here, the step width W ₁ is 4 mm to ₅ mm), and the angle θ ₁ of the strand 71 and the bond 72 is laid down. The upward inclination angle θ ₂ of the conventional product is about 60 ° which is steep as shown in FIG. 6B, whereas the upward inclination angle θ ₁ of both the strand 71 and the bond 72 related to the expanded metal 7 with this uneven pattern is As shown in FIG. 4B, it is set in the range of 5 ° to 40 °, more preferably in the range of 15 ° to 35 °. This uneven pattern with the expanded metal 7 has a small both upward inclination angle theta ₁ of the strand 71 and bond 72, by becoming figure which laid the strands 71 and bond 72, the hand when the person on it falls down Do not hurt your hands even if you put on. The expanded metal 7 with a desired concavo-convex pattern in consideration of safety is produced. Since the step width W is larger than that of the conventional product, the expanded metal 7 with a concavo-convex pattern with improved durability is produced (FIGS. 4 and 5). In addition, the expanded metal 7 with a concavo-convex pattern in FIG. 6 has a surface plated with silver.

(2) Expanded metal with concavo-convex pattern For example, expanded metal 7 with concavo-convex pattern made by using the above-mentioned manufacturing method is cut and stretched in patterned steel plate 43 provided with a concavo-convex pattern on one side of the steel plate. An expanded metal 7 with a concavo-convex pattern formed in a mesh shape. The surface 43a of the concave and convex pattern with expanded metal 7 is formed irregularities of satin finish, height _{t 2} is 0.2mm~1.0mm the protrusion 431 from the substrate surface 43a corresponding to the recess 432, and more preferably It is provided in the range of 0.4 mm to 0.6 mm. In addition, the size of the vertical Y and horizontal X of each satin is set to 10 mm or less, more preferably 5 mm or less. Therefore, when used for the grating, the textured unevenness exerts a non-slip function and is applied to the expanded metal 7 with the uneven texture for grating.

Also, uneven textured expanded metal 7 is mesh O is formed by strands 71 and bond 72, both upward inclination angle theta ₁ of the strand 71 and bond 72 are provided in a range of 5 ° to 40 ° ing. Here, the lower limit is set to 5 °. If the upward inclination angle is smaller than 5 °, the expanded metal is overlaid, and the mesh of the mesh O becomes too small. It is because it becomes difficult to obtain sufficient. For example, when the mesh of the mesh O becomes small, the weight increases and the aesthetic appearance also decreases. Furthermore, for example, when used as a grating, there is a problem that drainage becomes worse. On the other hand, the upper limit is set to 40 °. When the upward inclination angle exceeds 40 °, the degree of slit expansion increases as in the conventional product, and the strand 71 is greatly twisted. For example, when used for grating In addition, when a person falls over it, there is a risk of being hurt in the same way as shaving with a dropper. A more preferable range of both upward inclination angles of the strand 71 and the bond 72 is 15 ° to 35 °. If the strand 71 and the bond 72 are placed in a lying state within this range, even if a person falls over and puts his / her hand on the strand 71 and the bond 72, the strand 71 and the bond 72 are less likely to be cut.

  The expanded metal 7 with a concavo-convex pattern of the present embodiment has a large step width W, and the upward inclination angles of both the strand 71 and the bond 72 are 5 ° to 40 ° (more preferable range is 15 ° to 35 °). , This also leads to a form that suppresses the expansion of the mesh on the way. In the conventional product, as shown in FIG. 6, the strands 71 are fully expanded to form an acute diamond shape, and the twisted strands 71 are almost upright and form steep irregularities. On the other hand, in this embodiment product, each strand 71 stays in a fan shape in front of the rhombus as shown in FIGS. 4 and 5, and this rounded shape is also excellent in terms of safety. In addition, as shown in FIGS. 4 and 5, the gentle fan-shaped fan in front of the rhombus creates a product-friendly image.

(3) Effect According to the thus constituted grating for uneven patterned manufacturing method of expanded Metall exert stopping effect slip uneven pattern formed on the surface 43a. The conventional expanded metal has a problem that it is slippery in the LW direction, and particularly slippery when wet with water, but this is solved by forming an uneven pattern on the surface 43a. In particular, when the expanded metal 7 with a concavo-convex pattern having a satin pattern as in the present embodiment is used, the friction coefficient is increased, and further power can be exhibited (first effect).
Moreover, when it becomes the expanded metal 7 with the textured pattern of the satin pattern, the cold feeling of the metal of the steel sheet is wiped out by the textured pattern of the textured pattern, creating a soft atmosphere that looks and feels. The scenery makes you feel peaceful (second effect). Since the conventional product was only processed flat steel, it gave a cold image. On the other hand, the expanded metal 7 with a concavo-convex pattern changes its image depending on the pattern, and can be used not only for slip applications but also for landscape products such as fences, and can contribute to expansion of applications.

Furthermore, since the strand 71 and the bond 72 are laid down, even if a person falls on the top of the strand 71 and the bond 72, the hand is not injured. It is extremely superior from the viewpoint of safety (third effect). It is a safe, non-slip expanded metal that is friendly to people. In the conventional expanded metal, after cutting slits in a staggered pattern in a steel plate, the steel plate is stretched in the direction perpendicular to the slit and deformed to create a mesh pattern close to a rhombus. When the strand 71 and the bond 72 that are bound to expand are twisted and the upward inclination angle θ ₂ forms a steep angle and is used for grating or the like, it is uneasy from the viewpoint of safety. However, in the expanded metal 7 with the uneven pattern, the anxiety of the strand 71 and the bond 72 is removed. Moreover, the mesh O formed by the strands 71 and the bonds 72 stays in front of the rhombus and is rounded in a fan shape, which is excellent from the viewpoint of safety. The gentle Yamabushi fan shape in front of the rhombus is more effective in giving the product a relaxing atmosphere with the addition of the textured pattern on the satin.
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 improving aesthetics and improving safety, so it is suitable for grating. Unlike conventional expanded metal, vehicle tires traveling on the metal are not unnecessarily worn. Furthermore, it can be used in a wide range of fields such as fence coasting parts, especially roller coaster inspection scaffolds such as steel towers, bridges, amusement parks, multi-story parking lots, and carrier cars that carry cars, and it is extremely useful from the spread of applications.

  The present invention is not limited to those shown in the above-described embodiment, and various modifications can be made within the scope of the present invention depending on the purpose and application. Shape, size, number, material, etc. of heating furnace 1, rolling mill, rolling roller, patterned steel plate 43, convex portion 431, concave portion 432, feed roller, lower blade 61, upper blade 62, strand 71, bond 72, etc. Can be selected as appropriate. For example, the second step can be made by an expanded metal manufacturing method such as those disclosed in JP-A-11-10250 and JP-A-8-135127. The grating can be applied to the grating of JP-A-2006-2425 in addition to Patent Document 1.

In one form of the grating for uneven patterned manufacturing method of expanded Metall of the present invention, a first process explanatory view of the manufacturing process. It is 2nd process explanatory drawing which uses the patterned steel plate obtained at the 1st process as an expanded demetal. (A) is an enlarged vertical cross-sectional view of a patterned steel plate, and (B) is a plan view thereof. (A) is a partially enlarged view of an expanded metal with a concavo-convex pattern, and (B) is a view taken along line I-I in (A). It is an explanatory image figure of an expanded metal with a concavo-convex pattern. It is the elements on larger scale of the expanded metal of a prior art, (a) is the elements on larger scale of the expanded metal, (b) is the II-II arrow line view of (a).

221 Rolling roll
223 Transfer roll 43 Patterned steel plate 43a Surface 431 Convex part 432 Concave part
51,52 Roller
61 Lower blade
62 Upper blade
62a Yamabe 7 Expanded metal with pattern 71 Strand 72 Bond O mesh (cut)
t ₁ Thickness corresponding to the recess
t ₂ Height of convex part
θ ₁ tilt angle
Center distance in the long direction of LW mesh

Claims (2)

Multiple sequence is the finishing mill last finishing mill of, or transfer roll rolling roll (221), which scored in the irregularities on the surface of that of the finishing mill to be placed on the front (223 ), The convex portion (431) protrudes from the surface (43a ) of the plate thickness (t ₁ ) corresponding to the concave portion (432) on one side of the steel plate , and both the vertical (Y) and horizontal (X) in plan view are 10 mm or less. a first step of making the height (t ₂₎ is patterned steel satin finish stand out is uneven pattern in the range of 0.2mm~1.0mm of each convex section that is set (431) (43), said first After the step, a second step of forming an expanded metal formed in a mesh shape with a concavo-convex pattern by cutting and stretching the patterned steel plate (43) is further provided , and in the second step , strands (71) and bond (72) both upward inclination angle (theta ₁₎ of 5 ° to 40 ° of In a state laid them I coercive in circumference, and each strand (71) so as to be kept in a fan shape with rounded, characterized in that build expanded metal formed in the mesh shape grating For producing expanded metal with concave and convex patterns for use . The patterned steel plate (43) is fed between the lower blade (61) and the upper blade (62) so that the surface (43a) having the uneven pattern is on the lower side, and then the lower surface side is a ridge (62a). And lowering the upper blade (62) formed in a wave shape by the trough portion (62b), and making a cut in the patterned steel plate (43) by using the wavy peak portion (62a) of the upper blade (62). After extending the contact portion of the portion (62a), the lowered upper blade (62) is raised, and then the rollers (51) and (52) are moved between the lower blade (61) and the upper blade (62). Stops when the patterned steel plate (43) is fed and the upper blade (62) is moved laterally to move by half the distance (LW) in the longitudinal direction of the mesh (O). (62) is lowered, the pattern steel plate (43) is cut by the wavy crest (62a) of the upper blade (62), and the contact portion of the crest (62a) is further extended, On the patterned steel plate (43) The manufacturing method of the expanded metal with the uneven | corrugated pattern for gratings of Claim 1 which puts and extends a zigzag-like cut | interruption (O).

Images