JPH08290225A - Joining method of extruded materials each other and joined structure - Google Patents

Abstract

PURPOSE: To obtain joining of extruded materials having good joining state and excellent in heat conductivity by strongly joining so as to scrape off oxidized faces of projecting streak part and recessed streak part. CONSTITUTION: By jointly using a general purpose hydraulic press, etc., and simple jig, a projecting streak part 4 of base 3 of heat sink 1 is force-fitted in a corresponding recessed streak part 8 of base 7 of heat sink 2 with several ten pressure. The outer surface of projecting streak 4A and the inner surface of recessed streak part 8A are exposed to air to form the oxidized film of some thickness. At fitting, the outer surface of projecting streak part 4A is entered into the inner surface of recessed streak part 8A while being in tight contact each other. At this time, the width (d1) of projecting part 4A is formed a bit larger than the width (d2) of recessed streak part 8A, the oxidized film of part having width (d1) of projecting part 4A and oxidized film of the inner surface of recessed part 8A are srcaped off each other, the new born surface of metal to metal are exposed, partially is turned to normal temp state and then turning to tightly joined state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining method and joining structure for extruded members.

[0002]

2. Description of the Related Art For example, in consideration of thermal conductivity and electric conductivity of aluminum alloys, the welding is performed by resistance welding because of the high heat dissipation of aluminum and the oxide film formed on the surface. It is more difficult than metal joining, which is usually used in brazing and brazing, and in the case of extruded materials, the product size is restricted in the extrusion die, so products with widths of 500 mm or more cannot be produced. However, it was impossible to produce a product having a width larger than that and having a good thermal conductivity, unless a plurality of products having a size smaller than that were welded.

Therefore, for example, in a heat sink,
The width of the surface to which the heating element is attached (hereinafter referred to as the base) is 5
In the case of specifications exceeding 00 mm, it was either to give up production with an extruded material, or to weld and join the bases. There is also a method of fitting the two surfaces to be joined into a concavo-convex line, but the fitting is not enough to sufficiently satisfy the thermal conductivity and the electrical conductivity. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned conventional drawbacks and provide a joining method and joining structure for extruded materials having good thermal conductivity and electrical conductivity.

[0004]

According to the method of joining extruded members according to the present invention, a plurality of ridges are provided on the joint surface of one of the two independent extruded members to be joined, Providing a plurality of concave ridges corresponding to the convex ridges on the joint surface of the other extruded material, when press-fitting each convex ridge into the corresponding concave ridge, the oxidized surface of each convex ridge and concave ridge is It is characterized in that they are tightly fitted to each other so as to be peeled off from each other so that the new surfaces after being peeled off are in a state of being joined to each other by substantially normal temperature pressure welding.

Further, according to the extruded material joining method of the present invention, a plurality of ridges are provided on the joining surface of one of the two independent extruded materials to be joined and the other extruded material is provided. A plurality of concave streak portions corresponding to the convex streak portions are provided on the joint surface, and the convex streak portions project in a direction perpendicular to the joint surface and the width thereof is formed to be slightly larger than the width of the concave streak portion. The ridge has a part that has a predetermined angle to the direction perpendicular to the joint surface, and when each ridge is press-fitted into the corresponding ridge, the angle of the ridge is inside the ridge. It changes according to the angled part of the ridge, and the frictional force generated when the ridge and the ridge are fitted together causes the oxide film on the ridge and the ridge to be stripped off, creating a new metal surface. When exposed and partially brought into a state of pressure contact at room temperature, the ridges and ridges of the two extruded materials come into contact with each other. It is characterized in that it has to be.

Further, according to the method of joining extruded materials according to the present invention, a plurality of ridges are provided on the joining surface of one of the two extruded materials to be joined and the other extruded material is provided. A plurality of concave streak portions corresponding to the convex streak portions are provided on the joint surface, and the convex streak portions project in a direction perpendicular to the joint surface and the width thereof is formed to be slightly larger than the width of the concave streak portion. The ridge has a part that has a predetermined angle to the direction perpendicular to the joint surface, and when each ridge is press-fitted into the corresponding ridge, the angle of the ridge is inside the ridge. It changes according to the angled part of the ridge, and the frictional force generated when the ridge and the ridge are fitted together causes the oxide film on the ridge and the ridge to be stripped off, creating a new metal surface. The exposed part of it will be in a state of pressure contact at room temperature, and the contraction and expansion of the concave and convex parts due to the pressure during press fitting. 2 in combined action with the al results internal stresses
It is characterized in that the convex streak portion and the concave streak portion of the two extruded members are joined together. In addition, in the method for joining together extruded members according to the present invention, the tip end of the ridge is formed into a wedge shape or a round shape.

In the joint structure of the extruded members according to the present invention, a plurality of ridges are provided on the joining surface of one of the two independent extruded members to be joined,
A plurality of concave streak portions corresponding to the convex streak portions are provided on the joint surface of the other extruded material, and the shape of each convex streak portion and the concave streak portion is obtained by pressing each convex streak portion into the corresponding concave streak portion. , The ridges and ridges should be fitted so that the oxidized surfaces are stripped from each other, and the new surfaces after stripping should be shaped so that they will be in a welded state at approximately room temperature pressure welding. It is characterized by.

Further, in the joint structure of the extruded materials according to the present invention, a plurality of ridges are provided on the joining surface of one of the two extruded materials to be joined and the other extruded material is provided. A plurality of concave streak portions corresponding to the convex streak portions are provided on the joint surface, and the convex streak portions project in a direction perpendicular to the joint surface and the width thereof is formed to be slightly larger than the width of the concave streak portion. The ridge has a part that has a predetermined angle to the direction perpendicular to the joint surface, and when each ridge is press-fitted into the corresponding ridge, the angle of the ridge is inside the ridge. It changes according to the angled part of the ridge, and the frictional force generated when the ridge and the ridge are fitted together causes the oxide film on the ridge and the ridge to be stripped off, creating a new metal surface. When exposed and partially brought into a state of pressure contact at room temperature, the ridges and ridges of the two extruded materials come into contact with each other. It is obtained by configured to be.

Further, in the joint structure of the extruded materials according to the present invention, a plurality of ridges are provided on the joining surface of one of the two extruded materials to be joined and the other extruded material is provided. A plurality of concave streak portions corresponding to the convex streak portions are provided on the joint surface, and the convex streak portions project in a direction perpendicular to the joint surface and the width thereof is formed to be slightly larger than the width of the concave streak portion. The ridge has a part that has a predetermined angle to the direction perpendicular to the joint surface, and when each ridge is press-fitted into the corresponding ridge, the angle of the ridge is inside the ridge. It changes according to the angled part of the ridge, and the frictional force generated when the ridge and the ridge are fitted together causes the oxide film on the ridge and the ridge to be stripped off, creating a new metal surface. The exposed part of it will be in a state of pressure contact at room temperature, and the contraction and expansion of the concave and convex parts due to the pressure during press fitting. 2 in combined action with the al results internal stresses
It is configured such that the convex strip portion and the concave strip portion of the two extruded members are joined together. In addition, in the joint structure of the extruded members according to the present invention, the tip of the ridge portion has a wedge shape or a round shape.

Further, in the joint structure of the extruded materials according to the present invention, the two extruded materials are the bases of the heat sink. In addition, in the joint structure of the extruded members according to the present invention, a convex strip portion is provided on one side surface of one of the two bases, and a concave strip portion is provided on one side surface of the other base. There is. Further, in the joint structure of the extruded members according to the present invention, the base is provided with a convex strip portion on one side surface and a concave strip portion on the other side surface,
A plurality of bases are coupled one after another by press-fitting the ridges and the ridges of another base into the ridges and the ridges. In addition, in the joint structure of the extruded members according to the present invention, each side surface of the two bases has a thickness larger than that of the side surface of the mounting portion of the fin.

[0011]

A plurality of protrusions are provided on the joint surface of one extruded member of the two independent extruded members to be joined, and a plurality of recesses corresponding to the protrusions are formed on the joint surface of the other extruded member. When the ridges are provided and the ridges are press-fitted into the corresponding ridges, the new surfaces after the ridges and the ridges are fitted so that the oxidized surfaces of the ridges and the ridges are peeled off from each other Weld them so that they are in a state of being joined by pressure welding at room temperature. The ridges project in a direction perpendicular to the joint surface and the width thereof is formed to be slightly larger than the width of the recesses, and the ridge portion has a portion having a predetermined angle with respect to the direction perpendicular to the joint surface. Then
When press-fitting each ridge into the corresponding ridge, the angle of the ridge changes according to the angled part of the ridge inside the ridge, Due to the frictional force generated at the time of fitting, the oxide films on the ridges and the ridges are stripped off and the newly-formed surfaces of the metal members are exposed, and the ridges of the two extruded materials are partially in contact with each other at room temperature. The groove portion is joined. Even if the oxide film on the ridges and the ridges is thick and cannot move to a sufficiently room temperature pressure-welded state, the combined action of the internal stress generated by the contraction and expansion of the ridges and the ridges due to the pressure during press fitting The convex strip portion and the concave strip portion of the two extruded materials are intimately joined to each other, and the thermal conductivity and the electrical conductivity are improved.

[0012] Therefore, as the base of the heat sink, one having a ridge portion provided on one side surface and a ridge portion provided on the other side surface is used, and another number is used for the ridge portion and the ridge portion. A plurality of bases can be coupled one after another by press-fitting the concave and convex portions of the base to form a heat sink having a large heat dissipation area.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic view of an embodiment of a heat sink to which the present invention is applied, (A) is an exploded perspective view,
(B) is an exploded front view, (C) is an enlarged view of the main parts of disassembly, (D)
Shows an enlarged view of the main part after the connection. In the figure, reference numeral 1 denotes a heat sink, a base 3 having a surface 3a for mounting a heating element (not shown), and a heating element mounting surface 3 of the base 3.
It is composed of a plurality of fins 2 attached to the surface 3b facing a and cooling the heat of the heat generating element by contact with wind or the like. Reference numeral 5 denotes a heat sink similar to the heat sink 1, which is attached to a base 7 having a surface 7a for mounting a heat generating element (not shown) and a surface 7b of the base 7 facing the heat generating element mounting surface 7a. It is composed of a plurality of fins 6 having a surface for cooling the air by contact with wind or the like. Each of the components of the heat sinks 1 and 5, that is, the fins 2 and 6 and the bases 3 and 7 are made of a material having high heat conductivity, for example, an extruded material made of an aluminum material.

One side surface 3c of the base 3 of the heaton sink 1 is formed to have a thickness larger than that of the side surface 3d of the mounting portion of the fin 2, and the side surface 3c is provided with a plurality of (for example, four) ridges 4. It is provided. On the other hand, one side surface 7c of the base 7 is formed to have a thickness larger than the thickness of the side surface 7d of the mounting portion of the fin 6, and the side surface 7c has a number corresponding to the position corresponding to each ridge 13 of the base 3 ( (For example, four) concave streak portions 8 are provided, and the convex streak portions 4 are formed on the concave streak portions 8 by press fitting.
Are fitted together, and the bases 3 and 7 are joined at the ridge portion 4 and the ridge portion 8 with the side surfaces 3c and 7c as joint surfaces.

Each of the ridges 4A, 4B, 4C and 4D of the base 3 has a rounded tip and projects in a direction perpendicular to the joint surface 3c, and the width d1 of each ridge 8A, 8B. ,
It is formed slightly larger than the width d2 of 8C and 8D. On the other hand, the concave streak portion 8A of the base 7 has an inner surface 8A1 which is bent so as to have a predetermined angle θ with respect to the direction perpendicular to the joint surface 7c, and the concave streak portion 8B has a joint surface 7c.
It has an inner surface 8B1 which is bent on the side opposite to the portion 8A1 of the concave streak portion 8A with respect to a direction perpendicular to. In FIG. 1, the concave streaks 8A and 8B are arcuate.
The groove portions 8C and 8D have the same shape as the groove portions 8A and 8B described above.

Next, a method of joining the two heat sinks 1 and 5 made of the extruded material will be described. In the heat sinks 1 and 5 having the above-described structure, for example, by using a general-purpose hydraulic press or the like and a simple jig together, the protrusions 4 of the base 3 of the heat sink 1 become the corresponding recesses 8 of the base 7 of the heat sink 2. When press-fitting with a pressure of several tens of tons in a short time, the angle of the ridge 4 changes and fits inside the groove 8 according to the angled portion 8a of the groove 8.

The manner in which the ridges 4 and the recesses 8 are fitted will be described in detail with respect to the ridges 4A and the recesses 8A as an example. First, an oxide film having a certain thickness is formed in contact with air on the outer surface of the convex strip 4A and the inner surface of the concave strip 8A before fitting. Next, at the time of fitting, the convex ridge 4A enters the concave ridge 8A from the rounded portion of the tip thereof, and the angle is inside the concave ridge 8A, and the inner surface 8A1 has the angle of the concave ridge 8A. The outer surface of the ridge portion 4A comes in close contact with the inner surface of the ridge portion 8A. At this time, the width d1 of the protrusion 4A is formed to be slightly larger than the width d2 of the recess 8A, in other words, the protrusion 4A.
Since the volume V1 is slightly larger than the volume V2 of the concave streak portion 8A, an action called "stripping" occurs between the outer surface of the convex streak portion 4A and the inner surface of the concave streak portion 8A.

That is, the boundary portion 4A1 between the rounded portion of the convex strip portion 4A and the outer surface perpendicular to the joint surface 3c, and the concave strip portion 8
Frictional force is generated between the curved inner surface 8A1 of
Oxide film in the portion having the width d1 of the ridge 4A and the ridge 8A
The oxide films on the inner surfaces of the metal strips are peeled off from each other, and the outer surfaces of the ridges 4A and the inner surfaces of the ridges 8A are exposed to the newly-formed surfaces of the metal members and partially come into a state close to room temperature pressure welding. A tightly bonded state is achieved. Therefore, the thermal conductivity and the electrical conductivity of the combined bases 3 and 7 are improved.

FIG. 1 (D) shows the state of connection between the convex streak 4A and the concave streak 8A after the fitting is completed. The connection between the convex streak 4A and the concave streak 8A is mainly described above. The mating ridge portion 4A is designed to be slightly larger than the concave ridge portion 8A, and the concave ridge portion 8A has a predetermined angle with respect to the direction perpendicular to the joint surface. Since the ridge 4A has an angled portion in the insertion direction of the ridge 4A, when it is inserted by pressure, the inserted metal members contract and expand as shown by the arrow in the figure. The joint force is further increased by the combined stress of the internal stress that occurs due to the bending of the insertion direction during insertion.

Therefore, even when the oxidized surfaces of the convex stripes 4A and the concave stripes 8A are thick and cannot be transitioned to the state of sufficient galling, the stress of the joint surface generated by the applied pressure can improve the heat conduction. . The joining relationship between the ridges 4B, 4C and 4D and the ridges 8B, 8C and 8D is similar to the above-described joining relationship between the ridge 4A and the ridge 8A. Therefore, the heat generated from the heat generating element attached to the base is conducted to the fins 2 and 6 through the bases 3 and 7 joined so as to have good thermal conductivity as described above, and the fins 2 and 6 are 6 is the base 3 by the wind of a fan (not shown) attached to the heat sink.
And removes the heat transmitted from 7 and 7.

Each side surface 3c of the two bases 3 and 7
And 7c may have the same ridges and concaves as the thickness of the side surfaces 3d and 7d of the fin mounting portion, but the side surface 3c
If the thicknesses of 7 and 7c are made larger than the thicknesses of the side surfaces 3d and 7d of the mounting portion of the fins and the number of the convex stripes and the concave stripes is increased, the coupling force is further enhanced. Also, the ridge portion 4
The tips of A, 4B, 4C and 4D have a round shape, but may have a tapered wedge shape.

Next, FIG. 2 shows a modification of the ridges and ridges of the base of the heat sink to which the present invention is applied.
(A) is an enlarged view of the main part, (B) is a detailed view of the ridges, (C)
Shows a detailed view of the concave streak portion. Each ridge portion of the ridge portion 40 of the base 3 of the heat sink 1, for example, 40A and 40B has a predetermined width d1 and is formed by a caulking portion 40A2 protruding from the joining surface 3c in a direction perpendicular to the caulking portion 40A2. Further, the positioning portion 40A1 further extends, and the positioning portion 40A1 has a rounded tip.

On the other hand, each of the groove portions of the groove portion 80 of the heat sink 5, for example, 80A and 80B has a predetermined width d2, and the positioning portion 80 formed in the direction perpendicular to the joint surface 7c.
A1 and a caulking portion 80A2 which is inclined by a slight angle θ with respect to the direction perpendicular to the joint surface 7c and further protrudes from the positioning portion 80A1. The bottom portion of the caulking portion 80A2 is a ridge positioning portion 40A1. Is formed into a round shape that matches the tip shape of the. The width d2 of each groove 80 is the same as or slightly smaller than the width d of each groove 40. Positioning portion 40A of the base 3 of the heat sink 1
1 and the positioning portion 80A1 of the base 7 of the heat ink 5
Since the pressure from the base 3 at the time of press-fitting is surely converted to the fastening at the convex streak portion 40 and the concave streak portion 80 of the bases 3 and 7, the role of maintaining the squareness when the base 3 is fitted to the base 7 Do.

In the structure shown in FIG. 2, the ridges 40 of the base 3 of the heat sink 1 are connected to the base 3 of the heat sink 5.
When it is press-fitted into the concave streak portion 80 of No. 4 by a large pressure,
As described above, the width d1 of 0 is the same as the width d2 of each recessed portion 80 or slightly larger than the width d2 due to the dimensional tolerance. Therefore, the outer surface of the protruding portion 40 has an outer surface of the recessed portion 80. Friction occurs between the inner surface and the above-mentioned galling effect. Therefore, due to this galling action, the oxide film on the outer surface of the convex streak portion 40 and the oxide film on the inner surface of the concave streak portion 80 are stripped from each other, and the outer surface of the convex streak portion 40A and the inner surface of the concave streak portion 80A are separated from each other. The newly formed surface is exposed, and the newly formed surfaces are partially in a state close to room temperature pressure contact with each other, and the positioning portion 40A1 and the caulking portion 80A2, and the positioning portion 80A1 and the caulking portion 4 are formed.
0A2 is in a very tightly joined state. Therefore, the base 3 joined by the ridges 40 and the ridges 80
The thermal conductivity and electrical conductivity of Nos. 7 and 7 are improved.

After press fitting, the positioning portion 40 of the base 3
A1 depends on the angle θ of the caulking portion 80A2 of the base 7,
In this portion, the bases 3 and 7 are joined more reliably because they are forcibly bent in the direction perpendicular to the joining surface 7c and joined.

When the bases 3 and 7 are extruded materials,
Unlike cutting materials, there are dimensional tolerances at the time of extrusion, and this dimensional tolerance makes the galling action of the bases 3 and 7 insufficient, resulting in partial oxidation of the outer surface of the ridge and the inner surface of the ridge. This can result in areas where the membrane is not well stripped. However, the portion of the base 3 that is forcibly bent, that is, the positioning portion 40A1 generates a springback force that tries to return to the original position, and causes a stress different from that of the base fixing portion, which increases the coupling force between the bases. Thereby, the thermal conductivity is increased. That is, this portion plays a role of covering the variation in the heat sink performance due to the variation in the dimension of the product produced by the extrusion.

As described above, the bases 3 and 7 are joined to each other at the ridges 40 and the ridges 80 mainly by the galling action, but even in the case where the oxidized surface is thick and it is not possible to shift to the state of sufficient galling. The thermal conductivity can be improved by the stress generated by the applied pressure.
In addition, in FIG. 2, mainly the ridge portion 40A and the ridge portion 80A
The bonding state of the other is described, but the other ridges (the ridges 4
0B included) and corresponding ridges (including ridge 80B)
Also becomes the same joined state. Further, although the tip of the ridge portion 40 is formed in a round shape, it may be formed in a wedge shape or another shape.

Although the two embodiments of the present invention have been specifically shown and described in FIGS. 1 and 2, the present invention is not limited to the above, and various modifications can be made. For example, the ridge portion may have an angled portion and the recess portion may have a straight shape. In addition, the shapes and numbers of the ridges and the ridges are
It can be appropriately changed according to the magnitude of the pressure applied at the time of press fitting. Further, in the above example, the description has been given of the combination of the base having the convex strip portion on one side surface and the base having the concave strip portion on the one side surface, but it has the convex strip portion on one side surface and the concave strip portion on the other side surface. It is also possible to form a heat sink having a large heat dissipation area by using a number of bases each having a number of s and having the ridges and the ridges press-fitted one after another and coupled as described above. Further, in the above-mentioned embodiment, although the description has been given on the connection between the bases of the heat sink, the present invention is not limited to this, and is generally applicable to the connection between the extruded materials.

[0029]

According to the present invention, equipment for brazing and
By combining a general-purpose hydraulic press or the like with a simple jig, it is possible to obtain a joined extruded material with a good joining state, that is, with excellent thermal conductivity, without using an expensive dedicated machine for crimping.

Further, according to the present invention, the joint surfaces of the extruded materials are strongly rubbed against each other at the time of fitting, and the oxidized surfaces are peeled off so that the newly formed surfaces are joined to each other by galling, and their thermal conductivity is improved. Can be increased.

In consideration of the extrusion technique and the heat treatment process, when the oxidized surface is too thick to form a new surface sufficiently,
Further, even under various circumstances such as when the extrusion accuracy is slightly changed, the fastening of the extruded materials can be made more reliable.

[Brief description of drawings]

FIG. 1 is an exploded schematic view of an embodiment of a heat sink to which the present invention is applied, (A) is a perspective view, (B) is a front view,
(C) is an enlarged view of the main part, and (D) is an enlarged view of the main part after the connection.

FIG. 2 is a modified example of the ridges and the ridges of the base of the heat sink to which the present invention is applied, FIG.
(B) shows a detailed view of the convex stripes, and (C) shows a detailed view of the concave stripes.

[Explanation of symbols]

1,5 Heat sink 2,6 Fin 3,7 Base 4,4A, 4B, 4C, 4D, 40, 40A, 40B
Ridges 8,8A, 8B, 8C, 8D, 80,80A, 80B
Groove

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[Procedure amendment]

[Submission date] September 7, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

Claims (12)

[Claims] 1. A plurality of protrusions are provided on a joint surface of one of the two extruded members to be joined, and a plurality of protrusions are provided on a joint surface of the other extruded member. When the ridges are provided, and each ridge is press-fitted into the corresponding ridge, the ridges and the oxidized surfaces of the ridges are firmly fitted and peeled off from each other. A joining method for extruded members, characterized in that the later new faces are brought into a joined state by pressure welding at almost room temperature. 2. A plurality of protrusions are provided on a joint surface of one of the two extruded members to be joined, and a plurality of protrusions are provided on a joint surface of the other extruded member. The ridge portion is provided, the ridge portion protrudes in a direction perpendicular to the joint surface, and the width thereof is formed slightly larger than the width of the ridge portion, and the ridge portion with respect to the direction perpendicular to the joint surface. It has a part with a predetermined angle, and when press-fitting each ridge into the corresponding ridge, the angle of the ridge should match the part with the angle of the ridge inside the ridge. The oxide film on the ridges and the ridges is peeled off by the frictional force generated when the ridges and the ridges are fitted, and the newly-formed surfaces of the metal members are exposed and the parts are in a state of pressure welding at almost room temperature. The extruded material is characterized in that the ridges and the recessed portions of the two extruded materials are joined together. How to combine wills. 3. A plurality of protrusions are provided on the joint surface of one of the two extruded members to be joined, and a plurality of protrusions are provided on the joint surface of the other extruded member. The ridge portion is provided, the ridge portion protrudes in a direction perpendicular to the joint surface, and the width thereof is formed slightly larger than the width of the ridge portion, and the ridge portion with respect to the direction perpendicular to the joint surface. It has a part with a predetermined angle, and when press-fitting each ridge into the corresponding ridge, the angle of the ridge should match the part with the angle of the ridge inside the ridge. The oxide film on the ridges and the ridges is peeled off by the frictional force generated when the ridges and the ridges are fitted, and the newly-formed surfaces of the metal members are exposed and the parts are in a state of pressure welding at almost room temperature. At the same time, two extrusions are performed by the combined action of the internal stress caused by the contraction and expansion of the concave and convex ridges due to the pressure during press fitting. A method for joining together extruded materials, characterized in that the convex and concave portions of the material are joined together. 4. The method according to claim 2 or 3,
The tip of the ridge is wedge-shaped or rounded. 5. A plurality of protrusions are provided on the joint surface of one of the two extruded members to be joined and a plurality of protrusions are provided on the joint surface of the other extruded member. By providing each of the ridges and the shape of each ridge by pressing each ridge into the corresponding ridge,
Fit the ridges and ridges so that the oxidized surfaces are peeled off from each other, and make sure that the new surfaces after being peeled off are in a state of being joined by almost normal temperature pressure welding. Characteristic extruded material joint structure. 6. A plurality of protrusions are provided on the joint surface of one of the two extruded members to be joined, and a plurality of protrusions are provided on the joint surface of the other extruded member. The ridge portion is provided, the ridge portion protrudes in a direction perpendicular to the joint surface, and the width thereof is formed slightly larger than the width of the ridge portion, and the ridge portion with respect to the direction perpendicular to the joint surface. It has a part with a predetermined angle, and when press-fitting each ridge into the corresponding ridge, the angle of the ridge should match the part with the angle of the ridge inside the ridge. The oxide film on the ridges and the ridges is peeled off by the frictional force generated when the ridges and the ridges are fitted, and the newly-formed surfaces of the metal members are exposed and the parts are in a state of pressure welding at almost room temperature. Thus, the extruding member is configured so that the convex streak portion and the concave streak portion of the two extruded members are joined together. Combined structure of materials. 7. A plurality of ridges are provided on the joint surface of one of the two extruded members to be joined, and a plurality of ridges are provided on the joint surface of the other extruded member. The ridge portion is provided, the ridge portion protrudes in a direction perpendicular to the joint surface, and the width thereof is formed slightly larger than the width of the ridge portion, and the ridge portion with respect to the direction perpendicular to the joint surface. It has a part with a predetermined angle, and when press-fitting each ridge into the corresponding ridge, the angle of the ridge should match the part with the angle of the ridge inside the ridge. The oxide film on the ridges and the ridges is peeled off by the frictional force generated when the ridges and the ridges are fitted, and the newly-formed surfaces of the metal members are exposed and the parts are in a state of pressure welding at almost room temperature. At the same time, two extrusions are performed by the combined action of the internal stress caused by the contraction and expansion of the concave and convex ridges due to the pressure during press fitting. A joint structure of extruded members, characterized in that the convex and concave portions of the material are joined together. 8. The device according to claim 6 or 7,
The tip of the ridge is a wedge-shaped or rounded joint structure of extruded materials. 9. The device according to claim 6 or 7,
The two extruded materials are a combination structure of the extruded materials that are the base of the heat sink. 10. The apparatus according to claim 9, wherein one of the two bases has a ridge on one side surface of the base, and the other base has a ridge on one side surface of the base. Extruded material joint structure. 11. The apparatus according to claim 9, wherein the base is provided with a convex strip portion on one side surface and a concave strip portion on the other side surface, and the convex strip portion and the concave strip portion are formed of other bases. A joint structure of extruded materials in which a plurality of bases are joined one after another by press-fitting the concave and convex portions. 12. The extruded member coupling structure according to claim 10, wherein each side surface of the two bases has a thickness larger than a thickness of a side surface of the mounting portion of the fin.