CN207496151U - A kind of Copper-Aluminum compound heat sink - Google Patents

Abstract

The utility model provides a kind of Copper-Aluminum compound heat sink, compared with existing copper aluminium composite heating panel, the connection of aluminum substrate and copper coin is carried out using friction stir welding method, not only connection reliability is high, perfect heat-dissipating, and do not need to carry out aluminum substrate and copper coin it is additional anticipate, production process is simple, with short production cycle, expense is few, environment friendly is good.

Description

A kind of Copper-Aluminum compound heat sink

Technical field

The present invention relates to heat sink field, more particularly to a kind of Copper-Aluminum compound heat sink.

Background technology

Heat sink is a kind of device of the easy heat-generating electronic elements heat dissipation in electric appliance.For heat sink material, each Its heat conductivility of material is different, is arranged from high to low by heat conductivility, is silver, copper, aluminium, steel respectively.But if with silver Can be too expensive to do heat sink, therefore best scheme is using copper.Although aluminium considerably cheaper, it is apparent that thermal conductivity is just not so good as copper It is good（Only about 50% or so of copper）.Currently used heat sink material is copper and aluminium alloy, and the two respectively has its advantage and disadvantage.Copper Thermal conductivity it is good but expensive, difficulty of processing is higher, and weight is excessive, and thermal capacity is smaller, and easily aoxidizes.And fine aluminium is too It is soft, it is impossible to directly to use, all be that the aluminium alloy used could provide enough hardness, the advantages of aluminium alloy is cheap, weight Amount is light, but thermal conductivity will be far short of what is expected than copper.

In existing heat sink, material is formed there are many form, such as pure aluminum or aluminum alloy or fine copper or copper alloy.It is right Cost is no doubt cheap for pure aluminum or aluminum alloy, but its heat absorption and heat radiation function be not notable, and being generally used for requirement heat dissipation needs Want little component.For fine copper or copper alloy, heat dissipation effect is notable, but its production cost is very high, is dissipated for certain Caloric requirement is big, but cost input is required for low component extremely without using value.Therefore, based on above-mentioned, Wo Menxu Want a kind of inexpensive, high efficiency heat radiation heat sink.

In order to make the heat sink of low cost, high efficiency heat radiation, patent（Publication number CN202197491）Propose a kind of needle Copper type heat sink is inlayed to the aluminium of heating module, but the invention is needed using nickel plating process, by aluminium sheet or aluminium alloy plate, Yi Jitong Plate surface nickel plating or the metal that other anti-oxidant heat-conductings are electroplated, then tin metal is melted, tin is poured into mosaic groove, together When copper coin is fastened on mosaic groove, compress so that tin to appearance overflow so that copper coin closely connects with aluminum or aluminum alloy plate It touches.This not only complex procedures, the production cycle is long, costly, influence factor is more, environment friendly is poor, but also reliability is difficult to To guarantee.

Invention content

In view of the above deficiencies of the prior art, the purpose of the present invention is to provide a kind of Copper-Aluminum compound heat sinks, should Not only reliability is high for heat sink, perfect heat-dissipating, but also production process is simple, with short production cycle, expense is few, environment friendly It is good.

In order to achieve the above objects and other related objects, the present invention provides a kind of Copper-Aluminum compound heat sink, including aluminum substrate, Copper coin and stir friction welding seam three parts.The production program of the Copper-Aluminum compound heat sink is：It is dug on aluminum substrate first Go out and the matched notch of copper coin；Then aluminum substrate is placed on the rigid backing plate of agitating friction soldering equipment, and copper coin is put into In the notch dug, aluminum substrate and copper coin are rigidly fixed with fixture；Then start agitating friction soldering equipment, along aluminum substrate with Copper coin bonding wire implements agitating friction welding, stir friction welding seam is obtained, so as to complete the making of Copper-Aluminum compound heat sink.

The material of the aluminum substrate can be 1050 pure aluminum plates, 1060 pure aluminum plates, 6005 aluminium alloy plates, 6061 aluminium alloys Plate, 6063 aluminium alloy plates, 6101 aluminium alloy plates, YL102 aluminium alloy plates, ADC12 aluminium alloy plates etc..

The aluminum substrate can be fabricated to tabular, discoid, finned plate etc., and extruding, casting, pressure may be used The modes such as casting are molded.

The material of the copper coin can be T1 fine copper plate, T2 fine copper plate, T3 fine copper plate, brass sheet, bronze sheet etc..

The copper coin can be fabricated to arbitrary shape, such as rectangle, square, ellipse, circle as needed, can be with It is molded using modes such as extruding, casting, forgings.

The stir friction welding seam is in forming process, and the stirring-head of use is by retained part, shoulder and stirring Needle part forms, by systems such as 3Cr2W8V steel, 4Cr5MoSiV steel, 4Cr5MoSiV1 steel, GH4169 high temperature alloys, W-25Ce alloys It forms；The shaft shoulder lower face be equipped with multiple grooves, 1.5 ~ 3.5 times of a diameter of copper plate thickness of the shaft shoulder；The mixing needle is Cone is simultaneously provided with multigroup screw thread and three planes on peripheral surface, to increase in welding process weld metal in thickness direction Mobility, mixing needle outside diameter is 0.6 ~ 1.2 times of copper plate thickness, mixing needle end diameter is copper plate thickness 0.3 ~ 0.6 times, 0.9 ~ 0.98 times that mixing needle length is copper plate thickness.

The stir friction welding seam in forming process, rotary speed for 300 ~ 2000r/min, speed of welding 30 ~ 200mm/min, 2 ~ 3 ° of stirring-head angle of inclination, the shaft shoulder 0.1 ~ 0.5mm of volume under pressure, mixing needle deviate 0.1 ~ 0.3mm to copper coin side, Copper coin side obtains more fully heat during promoting agitating friction weldering process, so as to promote the Plastic Flow of copper coin side metal, Obtain the stir friction welding seam of high quality.

As described above, the beneficial effects of the invention are as follows：Compared with existing copper aluminium composite heating panel, welded using agitating friction Method carries out the connection of aluminum substrate and copper coin, and not only connection reliability is high, perfect heat-dissipating, but also does not need to aluminum substrate and copper Plate progress is additional to anticipate, and production process is simple, with short production cycle, expense is few, environment friendly is good.

Description of the drawings

Fig. 1 is the Copper-Aluminum compound cooling plate structure schematic diagram that the scheme of embodiment 1 in the present invention makes；

Fig. 2 is the Copper-Aluminum compound cooling plate structure schematic diagram that the scheme of embodiment 2 in the present invention makes；

Fig. 3 is the Copper-Aluminum compound cooling plate structure schematic diagram that the scheme of embodiment 3 in the present invention makes.

Piece mark explanation

1 aluminum substrate

2 copper coins

3 stir friction welding seams

Specific embodiment

Illustrate the embodiment of invention by particular specific embodiment below, those skilled in the art can be by this specification Disclosed content understands other advantages and effect of invention easily.

Embodiment 1：It is cut on the tabular aluminum substrate of extrusion forming first and the matched notch of rectangle copper coin； Then aluminum substrate is placed on the rigid backing plate of agitating friction soldering equipment, and copper coin is put into the notch dug, use fixture Aluminum substrate and copper coin are rigidly fixed；Then start agitating friction soldering equipment, implement stirring with copper coin bonding wire along aluminum substrate and rub Welding is wiped, the stirring-head that when welding uses is made of retained part, shoulder and mixing needle part, by GH4169 high temperature alloys It is made；The shaft shoulder lower face be equipped with multiple grooves, 1.5 times of a diameter of copper plate thickness of the shaft shoulder；The mixing needle is circle Taper is simultaneously provided with multigroup screw thread and three planes on peripheral surface, 0.6 times, stirring of the mixing needle outside diameter for copper plate thickness Needle end diameter is 0.3 times of copper plate thickness, mixing needle length is copper plate thickness 0.9 times, rotary speed 300r/min, weldering Speed 30mm/min, 2 ° of stirring-head angle of inclination, shaft shoulder volume under pressure 0.1mm are met, mixing needle is surveyed offset 0.1mm to copper coin, obtained Stir friction welding seam, so as to complete the making of Copper-Aluminum compound heat sink, structure diagram is as shown in Figure 1.

Embodiment 2：It is cut on the tabular aluminum substrate of extrusion forming first and the matched notch of oval copper coin； Then aluminum substrate is placed on the rigid backing plate of agitating friction soldering equipment, and copper coin is put into the notch dug, use fixture Aluminum substrate and copper coin are rigidly fixed；Then start agitating friction soldering equipment, implement stirring with copper coin bonding wire along aluminum substrate and rub Welding is wiped, the stirring-head that when welding uses is made of retained part, shoulder and mixing needle part, by GH4169 high temperature alloys It is made；The shaft shoulder lower face be equipped with multiple grooves, 3.5 times of a diameter of copper plate thickness of the shaft shoulder；The mixing needle is circle Taper is simultaneously provided with multigroup screw thread and three planes on peripheral surface, 1.2 times, stirring of the mixing needle outside diameter for copper plate thickness Needle end diameter is 0.6 times of copper plate thickness, mixing needle length is copper plate thickness 0.98 times, rotary speed 2000r/min, Speed of welding 200mm/min, 3 ° of stirring-head angle of inclination, shaft shoulder volume under pressure 0.5mm, mixing needle are surveyed offset 0.3mm to copper coin, are obtained Stir friction welding seam is obtained, so as to complete the making of Copper-Aluminum compound heat sink, structure diagram is as shown in Figure 2.

Embodiment 3：It is cut on the discoid aluminum substrate of extrusion forming first and the matched notch of square copper coin； Then aluminum substrate is placed on the rigid backing plate of agitating friction soldering equipment, and copper coin is put into the notch dug, use fixture Aluminum substrate and copper coin are rigidly fixed；Then start agitating friction soldering equipment, implement stirring with copper coin bonding wire along aluminum substrate and rub Welding is wiped, the stirring-head that when welding uses is made of retained part, shoulder and mixing needle part, by GH4169 high temperature alloys It is made；The shaft shoulder lower face be equipped with multiple grooves, 2 times of a diameter of copper plate thickness of the shaft shoulder；The mixing needle is circular cone Shape is simultaneously provided with multigroup screw thread and three planes on peripheral surface, and mixing needle outside diameter is 1 times of copper plate thickness, mixing needle is small It holds 0.45 times of a diameter of copper plate thickness, 0.95 times that mixing needle length is copper plate thickness, rotary speed 800r/min, weld Speed 120mm/min, 2.5 ° of stirring-head angle of inclination, shaft shoulder volume under pressure 0.3mm, mixing needle are surveyed offset 0.2mm to copper coin, are obtained Stir friction welding seam, so as to complete the making of Copper-Aluminum compound heat sink, structure diagram is as shown in Figure 3.

Any person skilled in the art can all repair above-described embodiment under the spirit and scope without prejudice to invention Decorations change.Therefore, such as those of ordinary skill in the art without departing from invent it is revealed spirit and technology All equivalent modifications completed under thought or change should be covered by the claim invented.

Claims (3)

1. a kind of Copper-Aluminum compound heat sink, it is characterised in that：The Copper-Aluminum compound heat sink is by aluminum substrate, copper coin and agitating friction Welding line forms；In forming process, the stirring-head of use by retained part, shoulder and stirs the stir friction welding seam Mix needle part composition；The shaft shoulder lower face is equipped with multiple grooves；The mixing needle is provided with for cone and on peripheral surface Multigroup screw thread and three planes.

2. a kind of Copper-Aluminum compound heat sink according to claim 1, it is characterised in that：The shape of the aluminum substrate is tablet Shape, discoid, finned plate, molding mode is extruding, casting, die casting.

3. a kind of Copper-Aluminum compound heat sink according to claim 1, it is characterised in that：The shape of the copper coin is rectangular Shape, square, ellipse, circle, molding mode are extruding, casting, forging.