CN1128038C

CN1128038C - Thermal radiator and its manufacture technology

Info

Publication number: CN1128038C
Application number: CN98122202A
Authority: CN
Inventors: 李顺荣; 李学坤
Original assignee: FUJIN PRECISION INDUSTRY (SHENZHEN) CO LTD; Hon Hai Precision Industry Co Ltd
Current assignee: FUJIN PRECISION INDUSTRY (SHENZHEN) CO LTD; Hon Hai Precision Industry Co Ltd
Priority date: 1998-11-06
Filing date: 1998-11-06
Publication date: 2003-11-19
Anticipated expiration: 2018-11-06
Also published as: CN1253273A

Abstract

The present invention provides a heat radiator and a manufacture method thereof. Jacks are directly punched on a plurality of thin plate surfaces, and the jacks are overlapped into a base which is leaned on a computer central processor; blades which convexly extend at the same side of the base are orderly inserted in the jacks; then, all the thin plate surfaces are quickly inserted into one body by the method that deformation slotted holes are punched on gaps of the blades to shorten the machining time; the thin plate surfaces are properly ground and cut into finished products. The heat radiator which is provided with a plurality of blades can be manufactured.

Description

Heat abstractor and manufacture method thereof

The present invention is relevant a kind of heat abstractor and manufacture method thereof, refer in particular to a kind of on the thin plate face punching insert for blade, and borrow each the thin plate face of distortion slotted eye embedding group that impacts to form the heat abstractor and the manufacture method thereof of base.

At present, the scope of using computer along with the fast-developing and various industries of computing information industry is more and more wide, the user is also more and more fast to the rate request that computer CPU (CPU) is handled data, and the circuit design of CPU has simplification at present, the trend of centralization, therefore central processing unit no longer only comprises simple wafer, also have the electronic component of many miniaturizations to include in the CPU gradually, so, the arithmetic speed that such electronic component is more and more fast, quite high whole heat will be supervened, so the heat of high temperature extremely is unfavorable for the stability and the quality of the telecommunication transmission of CPU, so need assist the heat that sheds by the fast heat radiation media of radiating rate.The structure of relevant heat abstractor can be with reference to United States Patent (USP) the 4th, 712 in the prior art, and 159,4,879, patents such as No. 891.The heat abstractor of these patents is modes of utilizing extrusion forming, one convexes with several large-area radiator shutters on the same side surface of radiation panel, therefore borrow radiation panel to be placed in that CPU is other to derive its heat, contact with air via blade again and convection current sheds.But the radiating efficiency of above-mentioned structure is not high, can not effectively satisfy the actual heat radiation needs of present CPU, and many problems of deriving easily during fabrication, and wherein greatest problem comes from the cooling surface area that how effectively enlarges heat abstractor.Generally speaking, it is the more closeer that blade is provided with number, and during the relative scale of its extended height and width bigger (being that blade is thin higher), the integral heat sink surface area of heat abstractor just can suitably increase, still, under the manufacturing technology of existing extrusion molding, the width of blade and aspect ratio reach 1: 8 and are not easy very much, and therefore, the width of blade can not be too thin, relatively number then can't increase, thereby heat dissipation capability is restricted.

For addressing the above problem the U.S. the 4th, 884,331,5,208,731,5,464,054,5,486, patents such as No. 980 have been done some and have been improved, and profile groove on above-mentioned large tracts of land radiator shutter is about to a plurality of fin that each blade will cut open into strip, and then increase the cooling surface area of heat abstractor.But, so design can only increase the part cooling surface area, can not effectively increase lobe numbers or change its width and aspect ratio, and too approach narrow blade on making when profile groove, the situation of bending or fracture takes place easily, the speed of therefore processing profile groove can not be too fast, and then productivity ratio will greatly be reduced.

Main purpose of the present invention is to provide a kind of cooling surface area that makes heat abstractor to increase to the heat abstractor and the manufacture method thereof of several times, it can be provided with the more closeer blade of number on heat abstractor base of the same area, and effectively improves the integral heat sink efficient of heat abstractor.In addition, utilize the more or less freely characteristic of thin plate punching processing, heat abstractor can be used for the blade winding by rapid punching out jack, and then can shorten the processing time-histories, effectively improve production capacity.

Technical characterictic of the present invention is: it includes punching, punching, combination, impact, milling and step such as cuts off, it is to borrow punching and punching step to make the plate face of tool jack and blade bar in a row respectively, then each plate face is formed base and blade in a row is tightly fitted on the corresponding jack successively and suitably extend in the ipsilateral of base, blastic deformation slotted eye on each interlobate base appropriate location then, so that each plate face each other build-in be integral and the combination of reinforced blade, impose cutting off of suitable length again and can obtain finished product.

Compared with prior art, the present invention has the following advantages: because of this heat abstractor is set up the more number of blade in the side of base, and make blade height not be subjected to the restriction of extrusion molding production technology, and effectively increased area of dissipation, make radiating efficiency better and more can keep the central processing unit operate as normal.

The present invention will be further described below in conjunction with drawings and Examples.

Fig. 1 is the finished product partial perspective view that heat abstractor of the present invention vertically disposes blade.

Fig. 2 is the manufacturing flow chart of heat abstractor of the present invention.

Fig. 3 is the stereogram of heat abstractor base plate of the present invention in conjunction with blade.

Fig. 4 is that heat abstractor of the present invention impacts the also stereogram of assembling plate.

Fig. 5 is the cutaway view of Fig. 4 along V-V line direction.

Fig. 6 is the cutaway view of Fig. 1 along VI-VI line direction.

Fig. 7 is the finished product stereogram of heat abstractor landscape configuration blade of the present invention.

As shown in Figure 1, heat abstractor 1 includes and is placed in central processing unit (not shown) upward so as to absorbing and conduct the base 10 of the heat that central processing unit produced, and the blade in a row 2 that extends setting by susceptor surface to a side, wherein base 10 is by the first plate face 11, the second plate face 12 and the 3rd plate face 13 are formed by stacking, the needs of its also visual actual processing are provided with the plate face of more or lesser amt, on these plate faces, be provided with several sockets hole 111 by corresponding the dashing of certain spacing, 121,131 (shown in Figure 3), and when these plate faces were overlapped into base 10 each other, the jack on each plate face be able to consistency from top to bottom.Blade 2 is rectangular en plaque, it is after directly punching goes out two staggered continuous blade bars 20 (Fig. 3 shows) on the strip, form with base 10 combinations and cracking-off steering tape 21 respectively again, each blade 2 all has bottom 22 and the comparatively sharp narrow top 23 slightly wide than the jack aperture, therefore utilize the narrow top 23 of blade 2 points that each blade 2 can be inserted rapidly to opposite side from a side of base 10 via the jack that is oppositely arranged, relending its more roomy bottom 22 is filled in only fixing, like this, just, can on base 10 surfaces, winding number row extend the blade 2 that is provided with to a side.Be formed with the passage that gap 14 can be used as circulation of air in 2 in these blades, therefore, the heat that central processing unit produced, can conduct on each blade 2 via base 10, and the side surface of borrowing each blade 2 and gap 14 interior air contact, heat is passed in the air, relend the cross-ventilation heat that sheds.In addition, processing is dashed and is provided with distortion slotted eye 15 on base 10 surfaces of 2 of per four adjacent blades, these distortion slotted eyes 15 are after each plate face of base is superimposed together and inserts blade 2 in a row successively, on blade 2 gaps, rush again, therefore can cooperate bottom 22 plugs of each blade 2 to terminate in the interior characteristic of jack, make each plate face combine closely into complete base 10 and unlikely separation, and after going out distortion slotted eye 15, base 10 plate faces with related pulling side, make near the jack peritreme of distortion slotted eye 15 and be out of shape thereupon, so also help blade 2 to be fastened on the base 10 and be difficult for deviating from.

See also shown in Figure 2ly, it is the flow process that the present invention makes above-mentioned heat abstractor 1, and it includes following several steps: one, punching step (Stamping) 30:

Take at first that the good raw material of heat conductivity is made, the thin plate of tool suitable thickness (being generally aluminium sheet) is as the

plate face

11,12,13 of base 10, and directly makes jack in a row 111,121,131 in these plate face upper punches.Two, punching step (Stamping) 31:

When each plate face is carried out the punching operation, can on rectangular strip, borrow the mode of punching moulding to make the blade bar 20 (shown in Figure 3) of two cross-over configuration in addition, wherein staggered punching blade bar 20 is the rapid windings of plate face that then help blade 2 and base 10 on the steering tape 21 in order to save material, in advance blade 2 one to be connected to.Three, integrating step (Assembling) 32:

As shown in Figure 3, the plate face of finishing punching is overlapped into base 10 each other, and make the blade in a row 2 that is connected on the steering tape 21 guide and aim at base 10 each jack respectively, make each blade 2 insert jack one by one then and protrude out out by opposite side from base 10 bottom sides, the bottom 22 that relends each blade 2 broad tightly fits in the jack of respective panels face and is fixed, after finishing the combining of base 10 and each blade 2, can the removal that fractures of the unnecessary steering tape 21 in blade 2 bottom sides will be connected in.Four, impact step (Punching) 33:

As shown in Figure 4, there is the base 10 of blade 2 in a row to move to mould 4 belows combination, this mould is formed by fixed head 40 and from the striking arm in a row 41 that fixed head 40 extends downwards, wherein fixed head 40 is connected to board (not shown) and goes up and drawn by pushing away of board to move up and down, and convexes with several across a certain distance square jacking blocks 42 mutually at root edge of each row's striking arm 41.Because vertical configuration that each row's striking arm 41 parallels with blade 2 trends of heat abstractor 1, and it is provided with the position and just is positioned on the gap 14 of respectively arranging blade 2, therefore when board drive fixed head 40 moves up and down, it is movable that each striking arm 41 will be inserted in respectively in the gap of respectively arranging blade 2, and, the length that striking arm 41 extends downwards is big than the height of blade 2, so moving downward, striking arm 41 will the square jacking block 42 of its bottom directly be impinged upon on the gap of adjacent four blades 2, and cause appropriate depth, trapezoidal poroid distortion slotted eye 15, it is faster that board pushes away the speed of drawing mould 4, the degree of depth of distortion slotted eye 15 is darker, then the ability of the plate face of its build-in base 10 and each blade 2 is stronger, as shown in Figure 5.Five, milling step (Milling) 34:

Please contrast Fig. 5 and shown in Figure 6, after finishing the winding of base 10 plate faces and blade 2, milling operation is carried out in the another side that can be further base 10 not be convexed with blade 2, to remove the protrusion 16 that protrudes because of punching out distortion slotted eye 15, make this side recovery smooth and be beneficial to and abut on the central processing unit.Six, cut off step (Cutting) 35:

On the above-mentioned semi-finished product of finishing milling, cut off operation by the required specification of heat abstractor 1.Seven, finish finished product 36.

Therefore, borrow the made heat abstractor 1 of each step of the invention described above, can save time, under the situation of cost, on base 10, set up the blade 2 of a greater number, cooling surface area with effective increase entire heat dissipation device 1, make the integral heat sink of heat abstractor 1 respond well, to solve the heat dissipation problem of present central processing unit.And, base 10 is divided into the structure of several plate faces, will help finishing rapidly of punching processing, and also having with the practice of organizing solid base 10 plate faces and blade 2, blastic deformation slotted eye 15 is convenient to processing, time saving effectiveness.

In addition, as shown in Figure 7, heat abstractor 1 ' blade 2 also can base 10 ' on according to respect to base 10 ' transverse direction arrange to be provided with so that base 10 ' on more blade 2 is set, effectively increase heat abstractor 1 ' heat-sinking capability.

Claims

1. a heat abstractor is used for resting on thermal source, so as to absorbing and heat that conduction heat sources produces, it is characterized in that:

Base is made up of a plurality of plate faces, dashes according to certain spacing on the plate face and is provided with several sockets hole;

Blade is inserted in the jack of each plate face and protrudes and extends on the side of base by base one side;

The distortion slotted eye, be located between the base blade and adjacent these blades on the appropriate location, can end the plate face of base and adjacent blades embedding fixing.

2. according to the described heat abstractor of claim 1, it is characterized in that: base is to be formed by stacking each other and when superimposed, jack set on it be able to consistency from top to bottom by plural plate face.

3. according to the described heat abstractor of claim 1, it is characterized in that: blade is behind the continuous blade bar cracking-off steering tape that gone out by the direct punching of strip and make, these blades all are long strip-board shape, and having than the jack aperture is wide bottom and comparatively sharp narrow top, when each blade is inserted to opposite side by base one side, utilize the bottom plug of its broad only to be fixed on the jack of each plate face.

4. according to the described heat abstractor of claim 1, it is characterized in that: the distortion slotted eye is gone out by mould institute's punching out on the susceptor surface between per four adjacent blades.

5. the manufacture method of a heat abstractor is characterized in that: the punching step is the jack of punching out number row on the good thin plate of heat conductivity;

Forming step is to make the blade that fuses by means of steering tape on strip;

Integrating step, be several to be dashed have the thin plate of jack to be overlapped into heat dissipation base, guide blade in a row again and aim at successively and insert in the jack of each thin plate, make each blade protrude out out, and the bottom of each blade is tightly fitted in the jack fixed by opposite side;

Impact step, but be distortion with mould bump base knocking-on build-in base and each blade on the position between adjacent blades;

The milling step is not carry out milling operation with protruding out vaned base another side, makes on this flat side down and the smooth plug in central processing unit of energy.

6. according to the manufacture method of the described heat abstractor of claim 5, it is characterized in that: being used for the thin plate of punching is aluminium sheet.

7. according to the manufacture method of the described heat abstractor of claim 5, it is characterized in that: forming step be borrow punching processing make blade on the strip and make by interconnected mode each blade bottom one be connected in the strip dual-side on the related steering tape of making.

8. according to the manufacture method of claim 5 or 7 described heat abstractors, it is characterized in that: its bottom of the made blade of forming step is wide than the jack of each thin plate, with the jack tight fit.

9. according to the manufacture method of claim 5 or 7 described heat abstractors, it is characterized in that: after integrating step is inserted the jack of base with each blade, can will be connected in the removal that fractures of the unnecessary steering tape in blade bottom side.

10. according to the manufacture method of the described heat abstractor of claim 5, it is characterized in that: impact the mould that step adopted and is formed, at each striking arm root edge and convex with several jacking blocks by fixed head and from the striking arm in a row that fixed head extends downwards.

11. the manufacture method according to the described heat abstractor of claim 5 is characterized in that: the semi-finished product of finishing milling can further cut off step again, to cut off out the heat abstractor finished product that meets required specification.