US20120047984A1 - Method for manufacturing depressed heat pipe - Google Patents

Method for manufacturing depressed heat pipe Download PDF

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Publication number
US20120047984A1
US20120047984A1 US12/861,910 US86191010A US2012047984A1 US 20120047984 A1 US20120047984 A1 US 20120047984A1 US 86191010 A US86191010 A US 86191010A US 2012047984 A1 US2012047984 A1 US 2012047984A1
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US
United States
Prior art keywords
heat pipe
work fluid
depressed
manufacturing
mold
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.)
Abandoned
Application number
US12/861,910
Inventor
Yu-Po HUANG
Tung-Jung Kuo
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.)
KUNSHAN JUE-CHUNG ELECTRONICS Co Ltd
Kunshan Jue Chung Electronics Co
Original Assignee
Kunshan Jue Chung Electronics Co
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 Kunshan Jue Chung Electronics Co filed Critical Kunshan Jue Chung Electronics Co
Priority to US12/861,910 priority Critical patent/US20120047984A1/en
Assigned to KUNSHAN JUE-CHUNG ELECTRONICS CO., LTD. reassignment KUNSHAN JUE-CHUNG ELECTRONICS CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HUANG, YU- PO, KUO, TUNG-JUNG
Publication of US20120047984A1 publication Critical patent/US20120047984A1/en
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • B21D22/025—Stamping using rigid devices or tools for tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033—Deforming tubular bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/06—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of metal tubes

Definitions

  • the invention relates to heat pipes, particularly to manufacture of heat pipes.
  • a heat pipe is provided with a round cross-section. But sometimes a heat pipe with an oblate cross-section made by a pressing process is required.
  • a mold with a flat surface is needed to press the heat pipe.
  • a linear contact is formed between the mold and pipe, and then it will progressively turn into planar contact.
  • the linear contact tends to invite a problem of stress concentration.
  • dents will be formed at the pressed portions, i.e., the pressed portions cannot keep flat. This will adversely affect the thermo-conductivity of the heat pipe.
  • An object of the invention is to provide a method for manufacturing a depressed heat pipe, which can prevent the pressed portions of the heat pipe from forming dents so as to obtain a completely flat surface.
  • the method of the invention includes the steps of:
  • FIG. 1 is a flowchart of the invention
  • FIG. 2 shows the first status of the first embodiment of the invention
  • FIG. 3 shows the second status of the first embodiment of the invention
  • FIG. 4 shows the third status of the first embodiment of the invention
  • FIG. 5 shows a finished product made by the first embodiment of the invention
  • FIG. 6 is a cross-sectional view along line 6 - 6 in FIG. 5 ;
  • FIG. 7 shows the first status of the second embodiment of the invention
  • FIG. 8 shows the second status of the second embodiment of the invention
  • FIG. 9 shows the third status of the second embodiment of the invention.
  • FIG. 10 shows a finished product made by the second embodiment of the invention.
  • FIG. 1 is a flowchart of the invention.
  • the invention provides a method for manufacturing a depressed heat pipe. The method is used for reshaping a round cross-section of a heat pipe into an oblate one.
  • a heat pipe with a round cross-section is reshaped into an oblate one (i.e. two parallel depressed flat surfaces). Please refer to FIGS. 1 and 2 .
  • a heat pipe 1 containing a work fluid 10 is provided in step 51 , in which the heat pipe 1 is provided with a round cross-section.
  • the heat pipe 1 is heated up to vaporize the work fluid 10 in step S 2 and as shown in FIG. 3 .
  • the heat pipe 1 is heated up directly or indirectly and to a temperature of 80 to 200° C.
  • the work fluid 10 in liquid phase is heated to turn into gas phase 10 ′.
  • the heat pipe 1 is heated up directly or indirectly and to a temperature of 80 to 200° C.
  • Step S 4 can be performed by employing a mold 2 including an upper mold 20 and a lower mold 21 .
  • the pressing surfaces of the upper mold 20 and lower mold 21 are flat planes.
  • the work fluid 10 ′ has been a vapor while the mold 2 is pressing the heat pipe 1 .
  • the vaporized work fluid 10 ′ may generate pressure to the heat pipe 1 to prevent the pressed portions 11 from denting.
  • two parallel pressed portions 11 are formed because both of the upper mold 20 and lower mold 21 are planar as shown in FIGS. 5 and 6 .
  • FIG. 7 shows the second embodiment of the invention.
  • the invention also can be applied in a heat pipe embedded in a seat.
  • a heat pipe 1 containing a work fluid 10 is provided, in which the heat pipe 1 is provided with a round cross-section.
  • a seat to be connected with the heat pipe 1 is provided, in which the seat has a heated surface 30 and a slot 31 in the heated surface 30 .
  • the slot 31 may be preferably applied with a thermo-conductive medium such as thermal grease.
  • the heat pipe 1 is heated up to vaporize the work fluid 10 as shown in FIG. 8 .
  • the heat pipe 1 is heated up directly or indirectly and to a temperature of 80 to 200° C.
  • the work fluid 10 in liquid phase is heated to turn into gas phase 10 ′.
  • the heat pipe 1 is heated up directly or indirectly and to a temperature of 80 to 200° C.
  • the heat pipe 1 is pressed into a trough 31 and to form a pressed portion 12 coplanar with the heated surface 30 as shown in FIGS. 9 and 10 .
  • This step can be performed by employing a mold including an upper mold 40 and a lower mold 41 .
  • the pressing surface of the upper mold 20 is provided with a holding groove 410 for accommodating the seat 3 .
  • the work fluid 10 ′ has been a vapor while the mold 2 is pressing the heat pipe 1 .
  • the vaporized work fluid 10 ′ may generate pressure to the heat pipe 1 to prevent the pressed portions 11 from denting.
  • the method of the invention can prevent a round heat pipe being pressed from denting.
  • the pressed portions can be kept completely flat.
  • the flat pressed portions can maintain good thermo-conductivity.
  • a heat pipe which has been pressed still can perform its original effect and function.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

First, a heat pipe containing a work fluid is provided. The heat pipe is not pressed until the work fluid turns into a vapor phase so as to form a desired shape. The method can be employed to shape a round cross-section of a heat pipe into an oblate one.

Description

    BACKGROUND OF THE INVENTION
  • 1. Technical Field
  • The invention relates to heat pipes, particularly to manufacture of heat pipes.
  • 2. Related Art
  • Usually, a heat pipe is provided with a round cross-section. But sometimes a heat pipe with an oblate cross-section made by a pressing process is required. In a conventional pressing process, a mold with a flat surface is needed to press the heat pipe. At the initial time of the pressing process, a linear contact is formed between the mold and pipe, and then it will progressively turn into planar contact. However, the linear contact tends to invite a problem of stress concentration. Thus, dents will be formed at the pressed portions, i.e., the pressed portions cannot keep flat. This will adversely affect the thermo-conductivity of the heat pipe.
  • On the other hand, when a heat pipe is connected with a thermo-conductive seat, the heat pipe with round cross-section is embedded into a slot of the seat by pressing. The heat pipe will be deformed by pressure to fit the shape of the slot. However, this process will also suffer from the same problem. That is to say, dents will be formed in the pressed portions of the heat pipe. As abovementioned, the pressed portions must be as flat as possible so as to keep good thermo-conductivity. However, the dents on the pressed portions are disadvantageous to the thermo-conductivity.
    • SUMMARY OF THE INVENTION
  • An object of the invention is to provide a method for manufacturing a depressed heat pipe, which can prevent the pressed portions of the heat pipe from forming dents so as to obtain a completely flat surface.
  • To accomplish the above object, the method of the invention includes the steps of:
  • a) providing a heat pipe containing a work fluid;
  • b) vaporizing the work fluid; and
  • c) pressing the heat pipe to form a depressed portion thereon.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a flowchart of the invention;
  • FIG. 2 shows the first status of the first embodiment of the invention;
  • FIG. 3 shows the second status of the first embodiment of the invention;
  • FIG. 4 shows the third status of the first embodiment of the invention;
  • FIG. 5 shows a finished product made by the first embodiment of the invention;
  • FIG. 6 is a cross-sectional view along line 6-6 in FIG. 5;
  • FIG. 7 shows the first status of the second embodiment of the invention;
  • FIG. 8 shows the second status of the second embodiment of the invention;
  • FIG. 9 shows the third status of the second embodiment of the invention; and
  • FIG. 10 shows a finished product made by the second embodiment of the invention.
    •  DETAILED DESCRIPTION OF THE INVENTION
  • Please refer to FIG. 1, which is a flowchart of the invention. The invention provides a method for manufacturing a depressed heat pipe. The method is used for reshaping a round cross-section of a heat pipe into an oblate one.
  • In the first embodiment of the invention, a heat pipe with a round cross-section is reshaped into an oblate one (i.e. two parallel depressed flat surfaces). Please refer to FIGS. 1 and 2. First, a heat pipe 1 containing a work fluid 10 is provided in step 51, in which the heat pipe 1 is provided with a round cross-section.
  • Secondly, the heat pipe 1 is heated up to vaporize the work fluid 10 in step S2 and as shown in FIG. 3. In this step, the heat pipe 1 is heated up directly or indirectly and to a temperature of 80 to 200° C.
  • The work fluid 10 in liquid phase is heated to turn into gas phase 10′. The heat pipe 1 is heated up directly or indirectly and to a temperature of 80 to 200° C.
  • Finally, after the work fluid 10 has been vaporized, the heat pipe 1 is pressed to form a depressed portion in step S3 and as shown in FIG. 4. Step S4 can be performed by employing a mold 2 including an upper mold 20 and a lower mold 21. In this embodiment, the pressing surfaces of the upper mold 20 and lower mold 21 are flat planes. The work fluid 10′ has been a vapor while the mold 2 is pressing the heat pipe 1. Thus the vaporized work fluid 10′ may generate pressure to the heat pipe 1 to prevent the pressed portions 11 from denting. In this embodiment, two parallel pressed portions 11 are formed because both of the upper mold 20 and lower mold 21 are planar as shown in FIGS. 5 and 6.
  • FIG. 7 shows the second embodiment of the invention. As can be seen in FIG. 7, the invention also can be applied in a heat pipe embedded in a seat. First, a heat pipe 1 containing a work fluid 10 is provided, in which the heat pipe 1 is provided with a round cross-section. And a seat to be connected with the heat pipe 1 is provided, in which the seat has a heated surface 30 and a slot 31 in the heated surface 30. The slot 31 may be preferably applied with a thermo-conductive medium such as thermal grease.
  • Secondly, the heat pipe 1 is heated up to vaporize the work fluid 10 as shown in FIG. 8. In this step, the heat pipe 1 is heated up directly or indirectly and to a temperature of 80 to 200° C.
  • The work fluid 10 in liquid phase is heated to turn into gas phase 10′. The heat pipe 1 is heated up directly or indirectly and to a temperature of 80 to 200° C.
  • Finally, after the work fluid 10 has been vaporized, the heat pipe 1 is pressed into a trough 31 and to form a pressed portion 12 coplanar with the heated surface 30 as shown in FIGS. 9 and 10. This step can be performed by employing a mold including an upper mold 40 and a lower mold 41. In this embodiment, the pressing surface of the upper mold 20 is provided with a holding groove 410 for accommodating the seat 3. The work fluid 10′ has been a vapor while the mold 2 is pressing the heat pipe 1. Thus the vaporized work fluid 10′ may generate pressure to the heat pipe 1 to prevent the pressed portions 11 from denting.
  • Therefore, the method of the invention can prevent a round heat pipe being pressed from denting. The pressed portions can be kept completely flat. The flat pressed portions can maintain good thermo-conductivity. As a result, a heat pipe which has been pressed still can perform its original effect and function.
  • While the forgoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof. As such, the appropriate scope of the invention is to be determined according to the claims.

Claims (9)

What is claimed is:
1. A method for manufacturing a depressed heat pipe comprising the steps in the order named:
a) providing a heat pipe containing a work fluid;
b) vaporizing the work fluid; and
c) pressing the heat pipe to form a depressed portion thereon.
2. The method of claim 1, wherein the heat pipe of the step a) has a round cross-section.
3. The method of claim 1, wherein the step b) is performed by heating up the heat pipe to a temperature range of 80° C. to 200° C.
4. The method of claim 1, wherein the step c) is performed by employing an upper mold and a lower mold.
5. The method of claim 4, wherein the step c) is to heat up the upper mold and the lower mold to a temperature range of 80° C. to 200° C.
6. The method of claim 1, wherein the step c) is to form a flat pressed portion.
7. The method of claim 1, wherein the step c) further comprises a seat to be connected with the heat pipe, the seat is provided with a trough for accommodating the heat pipe.
8. The method of claim 7, wherein the trough is applied with a thermo-conductive medium.
9. The method of claim 8, wherein the thermo-conductive medium is thermal grease.
US12/861,910 2010-08-24 2010-08-24 Method for manufacturing depressed heat pipe Abandoned US20120047984A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/861,910 US20120047984A1 (en) 2010-08-24 2010-08-24 Method for manufacturing depressed heat pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US12/861,910 US20120047984A1 (en) 2010-08-24 2010-08-24 Method for manufacturing depressed heat pipe

Publications (1)

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US20120047984A1 true US20120047984A1 (en) 2012-03-01

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150113807A1 (en) * 2013-10-31 2015-04-30 Asia Vital Components Co., Ltd. Manufacturing method of heat pipe structure
WO2017186219A1 (en) * 2016-04-28 2017-11-02 Schuler Pressen Gmbh Method for producing a hollow component, component and press for producing a hollow component

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4018269A (en) * 1973-09-12 1977-04-19 Suzuki Metal Industrial Co., Ltd. Heat pipes, process and apparatus for manufacturing same
US20090205396A1 (en) * 2007-02-14 2009-08-20 Alexander Zak Explosion forming system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4018269A (en) * 1973-09-12 1977-04-19 Suzuki Metal Industrial Co., Ltd. Heat pipes, process and apparatus for manufacturing same
US20090205396A1 (en) * 2007-02-14 2009-08-20 Alexander Zak Explosion forming system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JP-2006284020 Motomura Osamu October 19, 2006 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150113807A1 (en) * 2013-10-31 2015-04-30 Asia Vital Components Co., Ltd. Manufacturing method of heat pipe structure
US9421648B2 (en) * 2013-10-31 2016-08-23 Asia Vital Components Co., Ltd. Manufacturing method of heat pipe structure
WO2017186219A1 (en) * 2016-04-28 2017-11-02 Schuler Pressen Gmbh Method for producing a hollow component, component and press for producing a hollow component

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Legal Events

Date Code Title Description
AS Assignment

Owner name: KUNSHAN JUE-CHUNG ELECTRONICS CO., LTD., CHINA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HUANG, YU- PO;KUO, TUNG-JUNG;REEL/FRAME:024875/0802

Effective date: 20100816

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION