EP2260977B1 - Läppvorrichtung - Google Patents

Läppvorrichtung Download PDF

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Publication number
EP2260977B1
EP2260977B1 EP09007778A EP09007778A EP2260977B1 EP 2260977 B1 EP2260977 B1 EP 2260977B1 EP 09007778 A EP09007778 A EP 09007778A EP 09007778 A EP09007778 A EP 09007778A EP 2260977 B1 EP2260977 B1 EP 2260977B1
Authority
EP
European Patent Office
Prior art keywords
cooler
fixture
grinding
grinder
heated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP09007778A
Other languages
English (en)
French (fr)
Other versions
EP2260977A1 (de
Inventor
Kuo-Len Lin
Chen-Hsiang Lin
Jui-Ho Liu
Ken Hsu
Chih-Hung Cheng
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CpuMate Inc
Golden Sun News Techniques Co Ltd
Original Assignee
CpuMate Inc
Golden Sun News Techniques Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CpuMate Inc, Golden Sun News Techniques Co Ltd filed Critical CpuMate Inc
Priority to EP09007778A priority Critical patent/EP2260977B1/de
Priority to AT09007778T priority patent/ATE534489T1/de
Publication of EP2260977A1 publication Critical patent/EP2260977A1/de
Application granted granted Critical
Publication of EP2260977B1 publication Critical patent/EP2260977B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B37/00—Lapping machines or devices; Accessories
    • B24B37/04—Lapping machines or devices; Accessories designed for working plane surfaces
    • B24B37/042—Lapping machines or devices; Accessories designed for working plane surfaces operating processes therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B37/00—Lapping machines or devices; Accessories
    • B24B37/27—Work carriers
    • B24B37/30—Work carriers for single side lapping of plane surfaces

Definitions

  • the present invention in general relates to an apparatus for grinding a heated plane of a cooler
  • a cooling device including vapor chamber or heat pipe
  • a thermally conductive seat When operated, a cooling device, including vapor chamber or heat pipe, is first combined to a thermally conductive seat and is arranged a plurality of cooling fins thereon.
  • one side of the thermally conductive seat is contacted closely with the heating electronic component.
  • the heat generated from the heating electronic component is thermally conducted.
  • the heated face of a general cooler is usually configured as a matte, which looks flat and smooth after machined.
  • the roughness and flatness on the surface of the heated face is still poor, making the heated face and the heating component unable to be contacted closely, thereby, limiting the thermal conduction between the heated face and the heating electronic component. Therefore, if the roughness and the flatness on the heated face can be further improved, the contact tightness between the heated face and the heating electronic component will be thereby increased, so is the thermally conductive effect.
  • Japan patent application publication No. 2003-188320 discloses a heat sink and its manufacturing method.
  • the heat sink is provided with a heat-receiving surface, which is formed in a recessed state.
  • a thermo-conductive medium is provided between the heat receiving surface and a heating surface of an element to be cooled.
  • US 6,074,283 A discloses a lapping apparatus comprising a lapping plate, a fixture combined to the grinder and a pressure plate for pressing and clamping the work piece.
  • this grinder does not disclose to press and clamp the work piece via a point contact manner and to arrange the fixture to the grinder elastically by means of an elastic element and to elevate and lower the fixture elastically with respect to the grinding plate.
  • US 6,435,496 B1 is concerned with a low-profile rocking lever clamp that is provided with a workpiece-engaging edge that may be formed as a knife edge, an angled edge, a serrated edge, straight contact edge, and a rounded edge.
  • a workpiece-engaging edge may be formed as a knife edge, an angled edge, a serrated edge, straight contact edge, and a rounded edge.
  • the clamp is provided with a machinable workpiece engaging edge.
  • the clamp is used for fixing a workpiece on a support.
  • the invention is mainly to provide a grinding apparatus for grinding a heated plane of a cooler, so that the roughness and flatness on the surface of the heated plane is improved. Furthermore, the thermally conductive effect is enhanced due to a better contact relative to the heating electronic component.
  • An apparatus for grinding the heated plane of a cooler in which a heated plane of a cooler is ground includes a grinder and a fixture, in which the grinder has a grinding plate and an abrasive supply barrel that is arranged above the grinding plate for supplying abrasive into the gap between the heated plane and the grinding plate.
  • the fixture is combined to the grinder and has at least one pressure plate for arranging the cooler. Thereby, the pressure plate presses and clamps the cooler, making the heated plane of the cooler contact closely to the abrasive.
  • the roughness on the surface of the heated plane can be under Ra 0.03 ⁇ m and the flatness can be under 10 ⁇ m.
  • the invention is to arrange a fixture to a grinder.
  • the fixture presses and clamps a cooler via a point contact manner, whereby the heated plane of the cooler can possess a better flatness and surface roughness after being ground. Therefore, the contact tightness between the heated plane and the heating electronic component is increased, further generating a better effect of thermal conduction and enhancing the practicability of the invention.
  • Fig. 1 is an assembled illustration of a grinder and a fixture according to the present invention.
  • the invention is to provide a method for grinding the heated plane of a cooler, in which a grinder 10 having grinding plate 11 and fixing frame 15 is provided.
  • the grinding plate 11 is actuated by a motor 12 to rotate.
  • the fixing frame 15 is fixed onto the grinder 10 and is arranged an abrasive supply barrel 13 thereon.
  • the abrasive supply barrel 13 is filled with abrasive and has a nozzle 131 to inject the abrasive onto the grinding plate 11.
  • the grinder 10 is additionally connected a fixture 20.
  • At least one elastic element 14 e.g., spring, etc.
  • the elastic element 14 keeps a gap 100 between the fixture 20 and the grinder 11, such that the fixture 20 can be displaced upwardly and downwardly in an elastic way.
  • a driving device 21, such as hydraulic cylinder or pneumatic cylinder, is arranged on the fixing frame 15. The driving device 21 is connected by abutting against the fixture. By elevating or lowering the driving device 21, the fixture 20 is moved toward or far away the grinding plate 11.
  • Fig. 2 and Fig. 3 are an illustration and a cross-sectional view of a cooler that is pressed and clamped by a fixture.
  • the fixture 20 can correspond to the grinding plate 11 and is shown as a disk configuration.
  • the circumference of the fixture 20 is divided equally to project out a plurality of pressure plates 22, each of which is arranged a cooler 30.
  • the bottom portion of the pressure plate 22 is arranged a pointed bulge 221 that is abutted against the center of the cooler 30, thereby, the fixture 20 pressing and clamping the cooler 30 via a point contact manner.
  • the cooler 30 includes a thermally conductive seat 31, at least one heat pipe 32 and a plurality of cooling fins 33.
  • the heat pipe 32 has a flat evaporation section 321 and a condensation section 322.
  • the thermally conductive seat 31 is arranged at least one slot 310, into which the flat evaporation section 321 is inset.
  • the plural cooling fins 33 are arranged by being passed through by the condensation section 322 of the heat pipe 32.
  • the flat evaporation section 321 is formed as a heated plane 34 provided for contacting the heat source.
  • a cooler 30 is separately arranged under each pressure plate 22 of the fixture 20.
  • an abrasive 132 is injected into the gap 100 between the grinder 11 and the heated plane 34.
  • the abrasive 132 includes grinding liquid 1321 and grinding particle 1322, as shown in Fig. 7 .
  • the driving device 21 is actuated, making the fixture 20 lowered down and the pressure plate 22 separately press and clamp the top portion of each thermally conductive seat 31.
  • the pointed bulge 221 presses and clamps at the center of the thermally conductive seat 31, making each heated plane 34 touch the abrasive 132 and closely contact the grinding plate 11.
  • the motor 12 is actuated to bring along the grinding plate 11 to make a circular rotation.
  • the abrasive 132 can uniformly grind the heated plane 34.
  • the flatness of the heated plane 34 is improved to obtain a best value of roughness on the surface.
  • the driving device 21 is actuated again and lifted up. In so doing, the fixture 20 is rid of press and clamp and lifted up due to the elastically recovering force of the elastic element 14. Finally, the heated plane 34 of the cooler 30 gets rid of the relative contact with the grinding plate 11.
  • the coolers 30 can be moved to another grinding machine to undergo next grinding.
  • a series of grinding can be made in a grinder by separately injecting different abrasives 132 with different particle sizes.
  • a grinding process can first be undergone by injecting an abrasive 132 with larger particles. After the first grinding process, another abrasive 132 with finer particle is then injected to undergo a second grinding process. Following each grinding process, a finer abrasive 132 is injected until the required accuracy of the heated plane 34 is reached.
  • the value of the surface roughness is under Ra 0.03 ⁇ m, preferably, between Ra 0.03 ⁇ m and Ra 0.01 ⁇ m and the flatness is between 0.3 ⁇ m and 10 ⁇ m.
  • Fig. 8 is a flowchart diagram showing a grinding method , in which a heated plane of a cooler is ground.
  • a grinder 10 and a fixture 20, with a grinding plate 11 is first provided (step 61); next, a cooler 30 with a heated plane 34 is further provided (step 62); then, an abrasive 132 is injected into the gap between the grinding plate 11 and the heated plane 34 (step 63); during a series of grindings, different abrasives 132 with different particle sizes can be injected and, in the meantime, the fixture 20 presses and clamps the cooler 30 via a point contact manner, for example, another side of the heated plane 34 being pressed and clamped, making the heated plane 34 contact closely to the grinding plate 11 to touch the abrasive 132 (step 64); finally, the grinding plate 11 is rotated, making the heated plane 34 undergone at least one grinding process (step 65).
  • the thermally conductive seat 31 has a bottom plane 311 that is arranged at least one slot 310, into which the flat evaporation section 321 of the heat pipe 32 is inset.
  • the flat evaporation sections 321 are the heated plane 34. Nonetheless, when the surface of the flat evaporation sections 321 is flush with the bottom plane 311 of the thermally conductive seat 31, the heated plane 34 then includes the flat evaporation sections 321 and the bottom plane 311.
  • a delicate plane like mirror is obtained, which is provided for closely contacting a heating electronic component to dissipate the heat thereof.
  • Fig. 10 showing another cooler with ground heated plane .
  • This embodiment is substantially same as the first embodiment. The differences are that the bottom plane 311' of the thermally conductive seat 31' is only arranged an accommodating groove 310'; the cooler 30' has three heat pipes 32', each of which has a flat evaporation section 321' passing through a plurality of cooling fins 33'; the three heat pipes 32' arranged in parallel and pressed (clamped) in the accommodating groove 310' are flush with each other to form a flat evaporation section 321'; similarly, when the surface of the flat evaporation sections 321' is higher than the bottom plane 311' of the thermally conductive seat 31', the flat evaporation sections 321' are the heated plane 34'; on the other hand, when the surface of the flat evaporation sections 321' is flush with the bottom plane 311' of the thermally conductive seat 31', the heated plane 34' then includes the flat evaporation sections 321' and the bottom plane 311'.
  • the cooler 40 is a flat-plate heat pipe 41 that has a flat evaporation section 411 and is arranged a plurality of cooling fins 43.
  • the flat evaporation section 411 is the heated plane 42 that is ground to make its surface possess better surface roughness and flatness, thereby, the heated plane 42 contacting the heating electronic component further closely to increase its thermally conductive effect.
  • the ground heated plane is an indispensably design for a cooler indeed, which may positively reach the expected usage objective for solving the drawbacks of the prior arts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)

Claims (1)

  1. Vorrichtung zum Schleifen der erhitzten Fläche einer Kühleinrichtung, in der eine erhitzte Fläche (34, 34', 42) einer Kühleinrichtung (30, 30', 40) geschliffen wird und die umfasst:
    eine Schleifeinrichtung (10), die eine Schleifplatte (11) und eine Schleifmaterial-Zufuhrtrommel (13), die über der Schleifplatte (11) angeordnet ist, um einem Spalt zwischen der erhitzten Fläche (34, 34', 42) und der Schleifplatte (11) ein Schleifmittel (132) zuzuführen, besitzt; und
    eine Befestigungseinrichtung (20), die mit der Schleifeinrichtung (10) kombiniert ist und wenigstens eine Druckplatte (22) zum Anordnen der Kühleinrichtung (30, 30', 40) besitzt;
    wodurch die Druckplatte (22), die die Kühleinrichtung (30, 30', 40) presst und festklemmt, bewirkt, dass die erhitzte Fläche (34, 34', 42) in engen Kontakt mit dem Schleifmittel (132) gelangt,
    gekennzeichnet durch
    einen Befestigungsrahmen (15), der an der Schleifeinrichtung (10) befestigt ist, und wenigstens ein elastisches Element (14), das zwischen der Befestigungseinrichtung (20) und der Schleifeinrichtung (10) angeordnet ist, um die Befestigungseinrichtung (20) an der Schleifeinrichtung (10) elastisch anzuordnen, wobei die Schleifeinrichtung (10) ferner eine Antriebsvorrichtung (21) umfasst, die an dem Befestigungsrahmen (15) angeordnet ist und an der Befestigungseinrichtung (20) anliegt, um die Befestigungseinrichtung (20) so anzutreiben, dass sie elastisch angehoben und abgesenkt wird, um die Kühleinrichtung (30, 30', 40) zu pressen und festzuklemmen, wobei die Befestigungseinrichtung (20) entsprechend der Schleifplatte (11) in einer Scheibenkonfiguration ausgeführt ist, wovon ein Umfang in gleiche Teile unterteilt ist, so dass mehrere Pressplatten (22) nach außen vorstehen, wovon in einem unteren Teil wenigstens eine zugespitzte Erhebung (221) angeordnet ist, die die Kühleinrichtung (30, 30', 40) presst und festklemmt, so dass die Druckplatte (22) die Kühleinrichtung (30, 30', 40) punktkontaktartig pressen und festklemmen kann, wobei das Schleifmittel (132) eine Schleifflüssigkeit (1321) und Schleifpartikel (1322) enthält, während die Schleifmittel-Zufuhrtrommel (13) eine Düse (131) besitzt.
EP09007778A 2009-06-12 2009-06-12 Läppvorrichtung Not-in-force EP2260977B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP09007778A EP2260977B1 (de) 2009-06-12 2009-06-12 Läppvorrichtung
AT09007778T ATE534489T1 (de) 2009-06-12 2009-06-12 Läppvorrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09007778A EP2260977B1 (de) 2009-06-12 2009-06-12 Läppvorrichtung

Publications (2)

Publication Number Publication Date
EP2260977A1 EP2260977A1 (de) 2010-12-15
EP2260977B1 true EP2260977B1 (de) 2011-11-23

Family

ID=41302734

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09007778A Not-in-force EP2260977B1 (de) 2009-06-12 2009-06-12 Läppvorrichtung

Country Status (2)

Country Link
EP (1) EP2260977B1 (de)
AT (1) ATE534489T1 (de)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06104817B2 (ja) * 1990-10-09 1994-12-21 日本研磨材工業株式会社 アルミナ―ジルコニア系ラップ研磨材とその製造方法及び研磨用組成物
JP3982890B2 (ja) * 1997-08-06 2007-09-26 富士通株式会社 研磨装置、この装置に用いられる研磨治具、及び、この研磨治具に取り付けられる被研磨物取付部材
US6435496B1 (en) 1999-07-23 2002-08-20 Steven E. Phillips Low-profile rocking lever clamp
JP2003188320A (ja) 2001-12-17 2003-07-04 Matsushita Electric Ind Co Ltd 電子部品用ヒートシンクおよびその製造方法

Also Published As

Publication number Publication date
ATE534489T1 (de) 2011-12-15
EP2260977A1 (de) 2010-12-15

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