JP2011098374A - Method of manufacturing expanded metal or dimpled plate, finely perforated plate or finely dimpled plate manufactured by using the method, and heat radiating substrate material using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing expanded metals, by which finely perforated plates can be efficiently manufactured and finely perforated plate for plate thickness can be manufactured. <P>SOLUTION: In the method of manufacturing the expanded metal, corrugated blades having a stripe-pattern-shaped blades are arranged oppositely to each other at an upper part and a lower part, a flat plate 5 is fed between the upper and lower corrugated blades, the flat plate 5 is pressed from the upper part and the lower part with both corrugated blades, the flat plate 5 is formed into a corrugated shape and meshes are formed on the flat plate 5 by shearing, the processes are repeated, and the flat plate 5 is formed. Laminated blades 3, 4 in which a plurality of thin corrugated blades 3a-3e, 4a-4e are laminated in the feeding direction of the flat plate 5 so that the corrugated shapes are shifted, are used as the corrugated blade, and pressing is successively performed from the top part to the rear part of the flat plate 5 with the plurality of thin corrugated blades 3a-3e, 4a-4e of the laminated blades 3, 4, and two or more meshes are formed by one stroke of the vertical movement of the laminated blades 3, 4. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention provides a method for producing expanded metal that can improve the workability during production, which is a drawback of expanded metal, and can be produced at high speed even with a fine porous plate, and a method for producing a fine porous plate or expanded metal produced thereby. The present invention relates to a method for manufacturing an applied dimple plate, a fine dimple plate manufactured thereby, and a heat dissipation substrate material using the same.

  Conventionally, expanded metal has been known as a perforated plate or a mesh-like plate, and the standard is defined in JIS-G3351 “Expanded Metals” and applied in various fields.

  The feature of expanded metal is that, unlike punching metal, punching scraps are not produced at the time of manufacture, so that the production yield is good and 100% of the material can be made into a product.

  An example of the expanded metal mesh shape (mesh shape) is shown in FIGS.

  As shown in FIGS. 7A to 7C, the hole 72 of the expanded metal 71 has a rhombus shape or a turtle shape, and the surface and cross section thereof have a shape with a step 73.

  As shown in FIGS. 8A to 8F, in the conventional expanded metal manufacturing method, the wave blade 81 having the wavy blades is arranged on the upper side, and the flat blade 82 is arranged on the lower side. Using the flat blade 82, the flat plate 83 as the material is sequentially cut to form the holes 72, and the perforated plate, that is, the expanded metal 71 is manufactured.

  A conventional expanded metal manufacturing apparatus 80 includes a material feed roller 84 and a cutting device 85, and the cutting device 85 has a wave-shaped wave blade 81 arranged above a flat blade 82 fixed below. Can be moved in the vertical direction and in the horizontal direction (the direction from the back left side to the right side in the figure).

  When the expanded metal 71 is manufactured using the expanded metal manufacturing apparatus 80, first, the flat plate 83 is fed from the material feed roller 84 between the wave blade 81 and the flat blade 82 as shown in FIG. As shown in FIG. 8B, the wave blade 81 is lowered to shear the flat plate 83 between the wave blade 81 and the flat blade 82. At this time, the wave blade 81 is stopped halfway so as not to cut the flat plate 83 completely. Thus, the flat plate 83 is cut at regular intervals, and at the same time, the flat plate 83 is formed into a wave shape (wave shape) of the wave blade 81.

  Thereafter, as shown in FIG. 8 (c), after the wave blade 81 is raised, as shown in FIG. 8 (d), the flat plate 83 is fed by the material feed roller 84 (the feed is made by the material feed roller 84). At the same time, the wave blade 81 is moved in the half pitch (p / 2) lateral direction with respect to the pitch (wave pitch) p of the wave shape. Then, as shown in FIGS. 8E and 8F, similarly, the wave blade 81 is lowered to cut the flat plate 83, and the flat plate 83 is formed into a wave shape.

  Thereafter, the flat plate 83 is again fed by the material feed roller 84, the horizontal position of the wave blade 81 is returned to the original half pitch, and the flat plate 83 is indented at regular intervals, and the flat plate 83 is formed into a wave shape. The expanded metal 71 is manufactured by repeating this continuously. The above is the basic manufacturing method of the expanded metal 71.

The shape of the mesh (mesh) of the expanded metal 71 is directly related to the manufacturing method, and the fine width (step width) W of the mesh is the material feed roller 84 with respect to the plate thickness T _O of the flat plate 83 as the material. Is equal to the feed amount (feed pitch) of the flat plate 83, and the connection width of the adjacent holes 72 in the feed direction of the flat plate 83 (the width of the frame around the hole 72) is 2W. The mesh width direction pitch (mountain pitch) L _W is equal to the wave pitch p of the wave blade 81. Further, the longitudinal pitch S _W of the mesh, and thus corresponding to the amount infeed Namiha 81 (either by how much lower the Namiha 81 during shear).

As described above, the expanded metal 71 has a good yield when manufacturing a perforated plate and can be efficiently processed, but has a drawback. This is related to the above-described manufacturing method, and the conventional expanded metal 71 has a step 73 on the surface thereof, and has a shape of a hole 72 that is larger than the plate thickness T _O. In other words, the conventional expanded metal manufacturing method has a problem that a fine porous plate having fine holes 72 cannot be manufactured with respect to the plate thickness T _O. In addition, since the knives are added one by one, there is a problem that the manufacturing speed is slow and the processing efficiency is lowered.

JIS-G3351 is generally a method of making a net-like perforated plate having a pore size (width direction pitch L _W ) as large as 10 to 100 times the plate thickness T _O , but its hole area ratio is a problem. . In other words, conventionally, it can be produced if it is a net-like perforated plate whose pore size is 10 to 100 times larger than the plate thickness T _O , but a micro perforated plate having a small pore size relative to the plate thickness T _O can be produced. difficult. As a perforated plate having a minute pore size, it is the extent described in Non-Patent Document 1, and the pore size was not less than 5 times the plate thickness T _O.

  Here, the hole shape of the expanded metal 71 will be further considered.

The shape of the expanded metal 71 is as shown in FIGS. 7A to 7C, and the manufacturing method thereof is a flat blade in which the flat plate 83 is fixed downward as described in FIGS. 8A to 8F. A net-like perforated plate, that is, an expanded metal 71 is formed by punching alternately while moving the wave blade 81 disposed on the upper side to the left and right for each pitch (each time the flat plate 83 is fed). However, when attempting to mold the expanded metal 71 of comparatively fine pore size thickness T _O, forming limit is present.

FIG. 9 shows a schematic diagram of the cut and formed portion of the expanded metal 71. In the conventional expanded metal manufacturing method, the flat plate 83 which is a material is cut and formed by the flat blade 82 and the wave blade 81. in the rear (flat blade 82 side) of the molded part of) 91, portions of the flat plate 83 in contact with the end portion 81a of the Namiha 81 and shear fracture pressed into flat blade 82, the hole 72 of width L _h is formed The At this time, a portion (hereinafter referred to as a remaining bridge portion) 92 located in the concave portion of the wave blade 81 of the flat plate 83 remains, and the remaining bridge portion 92 connects the molded portion 91 and the rear flat plate 83.

  The forming portion 91 is subjected to bending deformation by the tip portion (bottom portion) of the wave blade 81. As a result, the hole 72 is formed by shearing. In order to receive bending deformation, the forming portion 91 generates ± yield stress and plastically deforms.

The forming limit in the expanded metal 71 having a fine hole size in place of the plate thickness T _O is that shear fracture occurs in the remaining bridge portion 92 behind the forming portion 91 (the connecting portion between the forming portion 91 and the rear flat plate 83). It depends on what. That is, the molding limit is determined by the magnitude of the shearing force of the remaining bridge portion 92 behind the molding portion 91 and the bending deformation force of the molding portion 91.

The shearing force F _S of the remaining bridge portion 92 on the flat plate 83 side per pitch is expressed by the following equation (1).

F _S = (L _W −L _h ) T _O τ _I (1)
Where L _W : mesh width direction pitch
L _h : width of the hole
T _O : Plate thickness
τ _I : Shear stress of the material (flat plate) If the bending deformation force of the forming portion 91 per pitch is F _b , the moment M at the center of bending is expressed by the following equation (2).

M = F _b / 2 × L _h / 2 = F _b × L _h / 4 (2)
Further, according to Mises' yield condition, the moment M at the center of bending is expressed by equation (3) shown in [Equation 1].

From the equations (2) and (3), the bending deformation force F _b of the forming portion 91 is expressed by the equation (4) shown in [Equation 2].

  The condition under which the expanded metal 71 can be normally formed is expressed by the following formula (5).

F _S > F _b (5)
Therefore, the limit condition is expressed by Expression (6) shown in [Formula 3] when Expressions (1) and (4) are substituted into Expression (5).

Usually, since the feed pitch (step width W) is substantially equal to the plate thickness T _{O of the} flat plate 83, when W = T _o , the equation (6) becomes the equation (7) shown in [Equation 4]. .

That is, in the conventional method of manufacturing expanded metal, what does not mean it is also formed in a mesh shape, have limited thickness T _O of the flat plate 83, the limit value of the thickness T _O of the flat plate 83 the width of the mesh It is proportional to the direction pitch L _W. That is, the width direction pitch L _W of the mesh to be produced small expanded metal 71, the limit value of the thickness T _O of the flat plate 83 becomes small, the plate thickness T _O is larger thickness widthwise pitch L of the mesh in the meat material _This means that an expanded metal 71 having a small _W , that is, a fine porous plate cannot be manufactured.

FIG. 10 shows the relationship between the sheet thickness T _O and the width direction pitch L _W in the JIS commercial product (commercially available JIS) and the expanded metal (non-patent literature) of Non-Patent Document 2 as a commercially available fine expanded metal. Further, the limit value (E limit line) of the plate thickness T _O obtained from the above equation (7) is also shown. As shown in FIG. 10, both are in the shape range satisfying the above-mentioned formula (7), and the expanded metal having a large plate thickness T _O and a small width direction pitch L _W , that is, a fine hole. Is not manufactured.

  In patent document 1, the idea which improves the processing limit (the above-mentioned formula (6) and formula (7)) of the conventional expanded metal is proposed. In Patent Document 1, a measure is taken in which a wavy backer plate that moves in synchronization with the upper wave blade is placed at the end of the cutting flat blade, thereby making it possible to improve the above-described processing limit. ing. However, with this measure, the backup is not complete enough to assist the load force, and a more powerful measure is required.

  Patent Document 2 proposes that the mesh shape is formed in two stages at the same time, and the processing speed is doubled to improve the processing speed, in that the step is fine and the processing speed does not increase. However, there is a need for an order of magnitude improvement in this regard.

  Furthermore, in Patent Document 3, as a method for producing expanded metal in a mass production manner, a method of producing expanded metal using an intermittent slitter and a spreading roll is described in a roll method. Among the products, this is a production method that can be applied only when the pore size is large instead of the thickness, and is not suitable for the production of a fine porous plate.

JP-A-1-127119 JP 2003-33824 A JP 2007-175720 A

Suzuki Technos Co., Ltd., [online], [Search June 19, 2009], Internet <URL: http://www.suzuki-tkns.co.jp/product/expanded/index.html> Cosmo Corporation, [online], [Search June 19, 2009], Internet <URL: http://www.cosmo9.co.jp/zairyo_metal.htm>

  As described above, the problem with the prior art is firstly the productivity, and the processing speed is slow because the knives are inserted one by one. There is no problem as long as a large mesh shape is made, but if a microporous plate with a feed pitch (step width) of the order of 1 mm or less is manufactured by this method, it takes a very long time, resulting in an expensive one. End up. In order to manufacture an inexpensive fine porous plate, it is essential to increase the speed.

  The second problem is the shape of the perforated plate, and when trying to produce a fine perforated plate, the plate thickness must be reduced, and a fine perforated plate cannot be produced in spite of the plate thickness. The expanded metal method is suitable for a porous plate having a large hole portion instead of a plate thickness, and a dimple plate that does not have a hole portion is not manufactured.

  Accordingly, an object of the present invention is to solve the above-described problems, efficiently manufacture a fine porous plate, and manufacture an expanded metal and a dimple plate capable of manufacturing a fine porous plate instead of the plate thickness. It is an object of the present invention to provide a method, a fine porous plate or a fine dimple plate produced thereby, and a heat dissipation substrate material using the same.

  The present invention was devised to achieve the above-described object. Wave blades having wave-shaped blades are vertically arranged opposite to each other, a flat plate is fed between the upper and lower wave blades, and both the flat plates are mounted. A method for producing expanded metal by pressing the wave blades from above and below, forming the flat plate into a corrugated shape and repeatedly forming a mesh by shearing on the flat plate, forming the flat plate, As the wave blade, using a laminated blade in which a plurality of thin wave blades are laminated in the feeding direction of the flat plate so that the wave shape is shifted, the plurality of thin wave blades of the laminated blade, the tip of the flat plate This is a method for producing an expanded metal in which a plurality of meshes are formed by one stroke of the vertical movement of the laminated blade by sequentially pressing from the rear to the rear.

  One of the laminated blades arranged vertically opposite to each other is supported by a multistage guide punch, and the plurality of thin-walled wave blades of the other laminated blade are sequentially tapered from the tip end side of the flat plate to the one laminated blade side. The multi-layered mesh may be formed while pressing the flat plate with one laminated blade supported by the multistage guide punch.

Further, the present invention is a micro perforated plate manufactured by the method for manufacturing an expanded metal, wherein the pitch of the flat plate in the width direction of the holes constituting the mesh is L _W , the width of the hole is L _h , wherein when the step size is the distance of the holes between is W fit, thickness T _O is preferable to satisfy expression (8) shown in [expression 5].

  In addition, the present invention is a heat radiating substrate material formed by joining high heat conductive materials to the upper and lower sides of the fine porous plate by clad rolling and joining the upper and lower high heat conductive materials in the holes.

  In the present invention, corrugated blades having corrugated blades are vertically arranged opposite to each other, a flat plate is fed between the upper and lower corrugated blades, and the flat plate is pressed from above and below with both wave blades to be recessed in the flat plate. Forming a flat plate to form a dimple plate, wherein a plurality of thin wave blades are used as the wave blades, the wave shapes of the thin wave blades are shifted, and the feeding of the flat plate is performed. By using a laminated blade laminated so as to provide a gap between the thin wave blades with respect to the embedding direction, and sequentially performing press processing from the tip of the flat plate to the rear with the plurality of thin wave blades of the laminated blade. The dimple plate manufacturing method is characterized in that a plurality of the recessed portions are formed by one vertical movement of the laminated blade.

Further, the present invention is a fine dimple plate manufactured by the method for manufacturing the dimple plate, wherein the pitch in the width direction of the recesses constituting the dimple is L _W , the width of the recess is L _h , and the adjacent When the step width, which is the interval between the recesses, is W, the plate thickness T _O should satisfy the formula (8) shown in [Equation 6]. When the vertical pressure is increased and the expression (8) is satisfied, the dimple can be formed without being sheared, and a gap (for example, a gap of about 1/5 of the blade thickness) is provided between the laminated blades. Fine dimples that form a dimple plate having a thin bottom wall thickness can be formed without making holes.

  Further, the present invention is a substrate material for heat dissipation, characterized in that it is formed by joining high heat conductive materials on top and bottom of the fine dimple plate by clad rolling.

  According to the present invention, a fine porous plate and a fine dimple plate can be efficiently manufactured, and a fine porous plate and a fine dimple plate can be produced instead of the plate thickness.

(A)-(d) is a figure explaining the manufacturing method of the expanded metal which concerns on one embodiment of this invention. (A) is an enlarged perspective view which shows the deformation | transformation state of the flat plate at the time of 1st step | paragraph load, (b) is the A section enlarged perspective view. (A) is a 1st step | stage (middle of a stroke), (b) is a perspective view which shows the net-like molded object after 1st stroke shaping | molding. (A)-(e) is a figure explaining the manufacturing method of the expanded metal which concerns on one embodiment of this invention. In this invention, it is a figure explaining the deformation | transformation state (formation limit) of an expanded metal. In the present invention, it is a graph showing the forming limits and expanded metal hole shape (relationship thickness T _O and widthwise pitch L _W). Note that the same plot is obtained when a fine dimple plate is used instead of the fine porous plate. It is a figure which shows the conventional expanded metal, (a) is a top view, (b) is the enlarged view, (c) is a 7C-7C sectional view taken on the line. (A)-(f) is a figure explaining the manufacturing method of the conventional expanded metal. It is a figure explaining the deformation | transformation state (formation limit) of the conventional expanded metal. Conventional expanded metal hole shape is a graph illustrating the forming limits and (relationship thickness T _O and widthwise pitch L _W). It is an enlarged view of a multistage guide punch. It is a figure which shows the fine dimple board which concerns on other embodiment of this invention, (a) is a perspective view, (b) is a longitudinal cross-sectional view. It is a disassembled perspective view which shows the board | substrate material for thermal radiation using the expanded metal (microporous board) of this invention.

  Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

  First, an expanded metal manufacturing apparatus used in the expanded metal manufacturing method according to the present embodiment will be described.

  As shown in FIG. 1, an expanded metal manufacturing apparatus 1 includes a material feed roller (not shown) and a cutting device 2. In the cutting device 2, the laminated blades 3 and 4 are arranged opposite to each other, and a flat plate (molding material plate) 5 serving as a material is intermittently fed between the laminated blades 3 and 4 from the material feed roller at a predetermined cycle. The

The laminated blade 3 disposed above includes a plurality of (five in FIG. 1) thin wave blades 3a to 3e having a wave shape (uneven wave shape). The flat plates 5 are laminated in the feeding direction so as to be shifted by 2 pitches (1 pitch corresponds to the mesh width direction pitch (blade width direction) L _W shown in FIG. 3B). Each of the thin wave blades 3a to 3e can be moved up and down individually, and the thickness of each thin wave blade 3a to 3e is formed to be equal to the fine width (step width W) of the expanded metal mesh to be manufactured. Has been.

Similarly, the laminated blade 4 disposed below has a plurality of (five in FIG. 1) thin wave blades 4a to 4e having a wave shape of 1/5 to 1/2 pitch (1 pitch is shown in FIG. It corresponds to the mesh width direction pitch L _W shown in b).) It is laminated in the feeding direction of the flat plate 5 so as to be shifted from each other. Each thin wave blade 4a to 4e can move individually up and down, and the thickness of each thin wave blade 4a to 4e is formed to be equal to the fine width (step width W) of the expanded metal mesh to be manufactured. Has been.

  In the present embodiment, the case where the laminated blades 3 and 4 are formed by laminating five thin wave blades 3a to 3e and 4a to 4e will be described, but the number of laminated thin wave blades is not limited to this, For example, several tens of thin wave blades can be stacked and used.

  The laminated blade 4 disposed below is pushed up from the side surface by a light spring force, but a step-shaped multi-stage guide punch 6 is disposed below and supported by a container 7 below. In the state before pressing, the thin-walled wave blades 4a to 4e lightly push up the material plate (flat plate 5) and serve as a plate presser, but when a load is applied from above, it moves to the position of the multi-stage guide punch 6, The multi-stage guide punch 6 is fixed in shape.

Here, an enlarged view of the multistage guide punch 6 is shown in FIG. The height D _Z of stairs shown in Figure 11 is equal to the longitudinal pitch S _W of the mesh, step width D _W of stairs, so equal to the expanded metal mesh fine width (step width W), These sizes are adjusted to the desired size of the expanded metal hole.

  The laminated blade 3 disposed above is supported by a taper punch 8 from above. The bottom surface of the taper punch 8 has a horizontal portion 8a and an inclined portion 8b. The inclination of the inclined portion 8b is the same as the inclination of the lower multi-stage guide punch 6, and moves in the inclination direction as the press head is lowered. It is said. Before pressing, each of the laminated blades 3a to 3e of the laminated blade 3 is in contact with the horizontal portion 8a of the taper punch 8, and each blade is horizontal, but the press head is lowered, and the taper punch 8 moves along the inclined surface 8b. Then, each laminated blade 3a-3e descend | falls from the front-end | tip part side of the flat plate 5 to the lower laminated blade 4 side sequentially.

  The material of the flat plate 5 is not particularly specified, but basically, a ductile metal material such as copper, aluminum, iron, titanium, nickel, niobium, gold, silver, and Invar (Fe-36Ni ) And the like, or an alloy system thereof may be used. Further, not only metals but also plastics and ceramic molding materials can be processed as long as they are ductile materials.

  Next, the manufacturing method of the expanded metal which concerns on this Embodiment is demonstrated.

  The expanded metal manufacturing method according to the present embodiment basically improves the conventional expanded metal manufacturing method, and does not form a notch for each line, but can form multiple layers of mesh at a time. It is a molding method by punching.

  More specifically, first, as shown in FIG. 1A, the flat plate 5 as a material is fed between the upper and lower laminated blades 3 and 4 by the material feeding roller. At the start of pressing, the thin wave blades 3a to 3e and the thin wave blades 4a to 4e are aligned horizontally, and the flat plate 5 is disposed therebetween.

  After feeding the flat plate 5 between the laminated blades 3 and 4, as shown in FIG. 1 (b), the cutting device 2 is operated, and the taper punch 8 is inclined (in the direction in which the flat plate 5 is pressed against the multistage guide punch 6). ) Then, it is pushed by the taper punch 8 and the entire laminated blade 3 and the flat plate 5 move downward. The opposing thin wave blade 4 also moves downward, but only the first thin wave blade 4a is supported by the lower multi-stage guide punch 6, and therefore cannot move, and the thin wave blade 4a The wave-shaped convex portion is pushed into the flat plate 5, and a slit (hole) is formed at the edge portion (the edge portion behind the first-stage thin wave blade 4a).

  FIGS. 2A and 2B show the deformed state of the flat plate 5 when the pressure is reduced by one pitch (when only the first-stage thin wave blade 4a is pressurized; first-stage load). 2A and 2B, for the sake of simplification of the drawing, the first-stage thin wave blade 3a, the second-stage thin wave blade 3b of the upper laminated blade 3, and the lower laminated wave blade 3 are shown. Only the first thin wave blade 4a of the blade 4 is shown, and the thin wave blades 3c to 3e and 4b to 4e in the subsequent stage are omitted.

  As shown in FIGS. 2 (a) and 2 (b), when the first-stage thin wave blade 4a is pushed in, the upper first-stage thin wave blade facing the first-stage thin wave blade 4a. Between 3a, the flat plate 5 receives bending deformation and is formed into a wave shape. Further, the first-stage thin wave blade 4a and the second-stage thin wave blade 3b are shifted by 1/5 to 1/2 pitch in the blade width direction (from the right front side to the left back direction in the drawing) Between the first-stage thin wave blade 4a and the second-stage thin wave blade 3b, shear cutting is performed at the protruding edge portion (wave-shaped convex portion) for each pitch in the blade width direction.

  Furthermore, when the taper punch 8 moves on the inclined surface and becomes the second stage load, as shown in FIG.1 (c), only the upper first stage thin wave blade 3a is detached from the horizontal part of the taper punch, The other thin wave blades 3b to 3e contact the horizontal portion of the taper punch and move downward, and the flat plate 5 also moves downward. On the other hand, the lower first stage thin wave blade 4 a and the second stage thin wave blade 4 b are supported by the multistage guide punch 6 and pushed into the flat plate 5. At this time, the flat plate 5 is subjected to bending deformation between the second stage thin wave blades 3b and 4b by pressurization between the taper punch 8 and the multistage guide punch 6, and is formed into a corrugated shape. Between the thin wave blade 4b and the third-stage thin wave blade 3c, a shear cut is made at the protruding edge portion (wave-shaped convex portion) for each pitch in the blade width direction.

  Further, when the taper punch 8 moves on the inclined surface, as shown in FIG. 1 (d), the third to fifth steps are formed in the same manner as the second step described above, and a mesh-like forming process for one stroke is performed. finish. In the state of FIG. 1D, the steps of the thin wave blades 3 a to 3 e are generated in accordance with the inclination of the inclined portion of the taper punch 8, and the steps of the thin thin wave blades 4 a to 4 e are the steps of the multistage guide punch 6. The inclination is the same as the taper punch 8 depending on the shape. The thin wave blades 4a to 4e arranged below are spring-supported on the side surfaces, and the flat plate 5 is formed while holding the flat plate 5 with the thin wave blades 4a to 4e of the laminated blade 4 at a constant load. Is done. As a result, a step-like net-like molded body in which a plurality of layers (here, five layers) of meshes are formed on the upper and lower thin-walled wave blades 3a to 3e and 4a to 4e, that is, the expanded metal 10, is obtained. 3A and 3B are perspective views of the first stage (in the middle of the stroke) and the expanded metal 10 after forming the first stroke, respectively.

  The multi-stroke of the first stroke is thus completed, and then the second stroke is entered. FIGS. 4A to 4E show the operation diagrams.

  As shown in FIG. 4A, first, the flat plate 5 as a material is fed between the upper and lower laminated blades 3 and 4 by the material feeding roller, and the first stroke is formed as shown in FIG. 4B. Do. Thereafter, as shown in FIG. 4C, the taper punch 8 is moved upward to perform unloading / release, and as shown in FIG. ), The second stroke is formed. In this way, after forming one stroke, the flat plate 5 is fed for one stroke (the length of the laminated blades 3 and 4), and the infinite length is intermittently repeated by repeatedly feeding the press-flat plate 5. The reticulated molded body, that is, the expanded metal 10 can be manufactured.

As shown in FIG. 3B, the expanded metal 10 manufactured in the present embodiment has a pitch in the width direction of the holes constituting the mesh as L _W , a width of the holes as L _h , and an interval between adjacent holes. When a certain step width is W, it is desirable that the plate thickness T _O satisfies the formula (9) shown in [Equation 7].

That is, it is desirable that the expanded metal 10 according to the present embodiment is formed with a small hole width direction pitch L _W instead of the plate thickness T _O. As described above, the width direction pitch L _W is equal to the wave pitch of the thin-walled wave blades 3a to 3e and 4a to 4e constituting the laminated blades 3 and 4, and is thus formed with a wave pitch that provides a desired mesh shape. The thin wave blades 3a to 3e and 4a to 4e may be used.

  The expanded metal 10 can be used for various applications as a fine porous plate. For example, the high thermal conductive material can be joined to the upper and lower sides of the fine porous plate made of the expanded metal 10 by clad rolling, and the upper and lower high thermal conductive materials can be joined in the hole and used as a heat dissipation substrate material.

  Here, the reason why the fine porous plate can be manufactured by the expanded metal manufacturing method according to the present embodiment will be described.

In the present embodiment, the flat plate 5 is formed with wave blades (thin wave blades 3a to 3e, 4a to 4e), but in the first stage, the upper thin wave blades 3a to 3e, the flat plate, and the lower portion are formed. Although the thin wave blades 4b to 4e move downward in the horizontal state, only the lower first wave blade 4a is supported by the multistage guide punch, so that the flat plate 5 is formed with the thin wave blade 3a. It is sandwiched between the thin wave blades 4a, bent and deformed, and the wave shape of the thin wave blades 3a, 4a is transferred and molded. The bending deformation force F _f generated at this time is the same as the expression (4) in the conventional expanded metal, and is expressed by the expression (10) shown in [Equation 8].

The flat plate 5 side of the forming part is perforated by shear deformation, and the load at that time is given by the lower first stage thin wave blade 4a and the upper second stage thin wave blade 3b. The force (load force) F _h is the same as the formula (1) in the conventional expanded metal, and is expressed by the following formula (11).

F _h = F _S = (L _W −L _h ) T _O τ _I (11)
Immediately after the start of shearing, the hole width L _h is close to zero, so it is a load of F _h = L _W T _O τ _I , but when the hole becomes large, the load of equation (11) is obtained.

Eventually, the force F _W applied to the first-stage thin wave blade 4a is expressed by the following equation (12).

F _W = F _f + F _h (12)
The manufacturing method of the expanded metal according to the present embodiment is a multi-stage forming method, and the bending deformation force F _f for forming is loaded by the thin-walled wave blade 4a at the first stage below. The minute force is not applied to the flat plate 5 side of the forming portion (the connecting portion between the forming portion and the rear flat plate 5), the limit condition is not satisfied, and the net-like formed body can be formed stably. it can.

  In the second-stage deformation, the molding is performed between the second-stage thin wave blades 3b and 4b and the third-stage thin wave blade 3c, which is the same as the first-stage deformation, and the expression (10) (12) is established. The same applies to the subsequent modifications.

  If n-stage molding is performed with one stroke, the stroke becomes longer by that amount, but the load is constant and does not change. Further, there is no fear of breaking at the mesh connecting portion (remaining bridge portion), and the processing speed is increased n times.

In the conventional expanded metal manufacturing method, as described with reference to FIG. 10, there is a processing limit. With a thick material, a porous material having a pore pitch L _W smaller than the E limit line cannot be manufactured. In the multi-stage molding method, there is no such limit.

  Further, as can be seen by comparing FIG. 5 and FIG. 9, the combination of the wave blade and the wave blade has a smaller amount of bending deformation at the time of molding than the conventional combination of the wave blade and the flat blade. Therefore, it is possible to form a thick hole with fine holes.

  As described above, in the expanded metal manufacturing method according to the present embodiment, the plurality of thin wave blades 3a to 3e and 4a to 4e are arranged so that the wave shape is shifted by 1/5 to 1/2 pitch. Using the laminated blades 3 and 4 laminated in the feeding direction of the flat plate 5, the plurality of thin wave blades 3 a to 3 e and 4 a to 4 e of the laminated blades 3 and 4 are sequentially pressed from the front end portion to the rear side. Thus, a multi-layered mesh is formed with one stroke of the vertical movement of the laminated blades 3 and 4.

  In the present embodiment, the thin-walled wave blade 3a having a thickness corresponding to the fine width (step width) W of a large number of meshes, in contrast to the manufacturing method in which the conventional wavy blade and the flat blade are used to cut one by one. Using the laminated blades 3 and 4 in which 3e and 4a to 4e are laminated, the wave blades are used to form a multi-step notch in one stroke, and the processing speed is the thin-walled wave blades 3a to 3e and 4a to be used. 4e times the number of sheets, making it possible to manufacture with extremely high productivity.

  Furthermore, by stacking a large number of thin wave blades and using them as the laminated blades 3 and 4, the length that can be formed in one stroke can be improved, for example, by 20 to 30 times, and the processing speed can also be increased at that ratio. This effect is particularly significant for a microporous plate, in which productivity is lowered in the prior art, and the same effect can be expected for a large size product.

  Furthermore, according to the present invention, not only productivity is improved, but also an effect is exhibited in terms of shape stability. In the conventional expanded metal manufacturing method, when a thick material is processed, the joint portion of the mesh is cut due to shear deformation, so there is a limit to the processing of the molded product, and the wall thickness exceeding the E limit line in FIG. Although it has been stated that it cannot be molded unless it is in the range, the production method of the present invention has no such limitation, and even if it is a thick material that cannot be processed by the prior art, a fine porous plate having a fine pitch network Molding becomes possible.

  The manufacturing method of the expanded metal and the fine porous plate has been described above, but when the flat plate is pressed with a laminated blade from above and below, the flat plate is sheared and no mesh is formed. Dimples in which dents are formed on the flat plate instead of expanded metal or microporous plate by providing a gap (for example, about 1/5 of the blade thickness) between the thin wave blades of the laminated blades 3 and 4 shown in FIG. The board can be made.

Further, when the pitch in the width direction of the recesses constituting the dimples is L _w , the width of the recesses is L _h , and the step width which is the interval between the adjacent recesses is W, the plate thickness To is By satisfying the formula (8) shown in 9], a fine dimple plate can be manufactured. A fine dimple plate is shown in FIG. (A) is a perspective view of the fine dimple plate 100, (b) is a longitudinal sectional view of the fine dimple plate 100, 101 is a dimple (dent), 102 is the surface of the fine dimple plate 100, and 103 is This is the back surface of the fine dimple plate 100.

  Note that the gap between the thin wave blades may be appropriately adjusted so that the dimple has a desired shape (size).

  In carrying out the present invention, pure copper and Invar (Fe-36Ni) were used as the material of the flat plate 5, and the flat plates 5 having thicknesses of 0.15 mm and 0.2 mm and a width of 50 mm were used. The production of the micro perforated plate (expanded metal 10) is performed by using the multi-stage pressing method shown in FIGS. 1 to 4, and as the laminated blades 3 and 4, 25 thin wave blades having a thickness of 0.2 mm are laminated. Was performed by pressing in 25 multistages.

  Therefore, 5 mm can be formed by one stroke, and by forming a feed of 5 mm for each stroke, continuous forming can be performed and a mesh-like fine porous body of several m to several tens m can be formed.

  Tables 1 and 2 show the results of comparison between the expanded metal produced by the conventional expanded metal production method shown in FIG. 8 and the expanded metal 10 produced by the expanded metal production method of the present invention.

  As shown in Tables 1 and 2, both the copper material and Invar (Fe-36Ni) have a thick plate thickness of 0.2 mm and 0.15 mm, and a wave blade pitch of 1 mm, 0.5 mm and 0.3 mm. However, according to the expanded metal manufacturing method of the present invention, a stable shape was exhibited and required dimensions could be obtained. On the other hand, in the conventional expanded metal manufacturing method, both the copper material and Invar (Fe-36Ni) break the connecting portion (remaining bridge portion), and normal molding is impossible.

  FIG. 6 shows the data of the expanded metal of the present invention (product of the present invention) in FIG. 10, but it can be seen that according to the present invention, normal forming is possible even in the region exceeding the E limit line. . With the conventional expanded metal, as calculated, the dimensions in Tables 1 and 2 exceeded the processing limit, and normal molding was impossible.

  Next, the substrate material for heat dissipation was produced using the fine multi-plate produced with the manufacturing method of said expanded metal, and the characteristic was evaluated.

As shown in FIG. 13, an Invar microporous plate 111 having a mountain pitch L _{W of} 0.5 mm and a plate thickness T of 0.2 mm shown in Table 2 is sandwiched from above and below by a Cu plate 112 (high thermal conductive material) having a plate thickness of 0.2 mm. The substrate for heat dissipation 113 (A) having a CIC structure was manufactured by clad rolling. Specifically, after cold rolling at a workability of about 70%, diffusion heat treatment was performed at about 600 ° C. so as not to form an intermetallic compound at the interface between Invar and Cu. Thereby, the Cu plates arranged above and below are joined in the holes of the Invar microporous plate 111. The plate thickness of the final heat dissipation substrate material 113 was 0.2 mm.

  As a comparative example, a heat dissipation substrate material (B) having a conventional CIC structure was manufactured by clad rolling an Invar plate with no holes formed between Cu plates (high thermal conductivity materials) from above and below. Except for using an Invar plate in which no hole is formed, the plate thickness and the production conditions are the same as those in the above example.

When the thermal expansion coefficients are compared, the heat dissipation substrate material (B) is 11 × 10 ⁻⁶ / ° C. · m, whereas the heat dissipation substrate material (A) is 8.6 × 10 ⁻⁶ / ° C · m. When the thermal conductivity in the thickness direction is compared, the heat dissipation substrate material (B) is 31 W / ° C · m, whereas the heat dissipation substrate material (A) is 163 W / ° C · m. The heat dissipation substrate material (A) had lower thermal expansion and higher thermal conductivity.

  It should be noted that a heat radiating board that is rolled by sandwiching it with a high heat conductive material such as a Cu plate from the top and bottom of the fine dimple plate instead of the fine porous plate has the same low thermal expansion and high thermal conductivity as the heat radiating board material (A). Became a rate.

DESCRIPTION OF SYMBOLS 1 Expanded metal manufacturing apparatus 2 Forming and cutting apparatus 3 and 4 Laminated blades 3a to 3e, 4a to 4e Thin wave blade 5 Flat plate 6 Multi-stage guide punch 7 Container 8 Tapered punch

Claims (7)

Wave blades having wave-shaped blades are vertically arranged opposite to each other, a flat plate is fed between the upper and lower wave blades, and the flat plate is pressed from the upper and lower sides in order to make the flat plate into a wave-shaped shape. It is a method of forming an expanded metal by forming the flat plate by repeating forming and forming a mesh by shearing on the flat plate,
As the wave blade, using a laminated blade in which a plurality of thin wave blades are laminated in the feeding direction of the flat plate so that the wave shape is shifted, the plurality of thin wave blades of the laminated blade, the tip of the flat plate A method for producing an expanded metal, wherein a plurality of meshes are formed by one stroke of vertical movement of the laminated blade by sequentially pressing from the rear to the rear.   One of the laminated blades arranged vertically opposite to each other is supported by a multistage guide punch, and the plurality of thin-walled wave blades of the other laminated blade are sequentially tapered from the tip end side of the flat plate to the one laminated blade side. The expanded metal manufacturing method according to claim 1, wherein the plurality of layers of meshes are formed while pressing the flat plate with one laminated blade supported by the multistage guide punch. A fine porous plate manufactured by the expanded metal manufacturing method according to claim 1, wherein a pitch in a width direction of holes constituting the mesh is L _W , a width of the holes is L _h , and the adjacent holes A microporous plate characterized in that the plate thickness T _O satisfies the formula (1) shown in [Equation 1], where W is a step width which is an interval between each other.

  A heat-dissipating substrate material formed by joining high heat conductive materials to the top and bottom of the fine porous plate according to claim 3 by clad rolling and joining the top and bottom high heat conductive materials in the holes. A wave blade having a wave-shaped blade is vertically arranged opposite to each other, and a flat plate is fed between the upper and lower wave blades, and the flat plate is pressed from above and below with both wave blades to form a recess in the flat plate. It is a method for producing a dimple plate by molding the flat plate,
As the wave blade, a plurality of thin wave blades are used, the wave shape of which is shifted, and a laminated blade laminated so as to provide a gap between the thin wave blades in the feeding direction of the flat plate, With the plurality of thin wave blades of the blade, a plurality of the recessed portions are formed by one stroke of the vertical movement of the laminated blade by sequentially pressing from the front end portion of the flat plate to the rear. A method for manufacturing a dimple plate. When the pitch in the width direction of the recesses constituting the dimples is L _W , the width of the recesses is L _h , and the step width which is the interval between the adjacent recesses is W, the plate thickness T _O is [several A fine dimple plate manufactured according to claim 5 that satisfies the formula (1) shown in [2].

  A heat-dissipating substrate material, which is formed by joining high heat conductive materials on top and bottom of the fine dimple plate according to claim 6 by clad rolling.

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