EP0144460A1 - Procédé pour la fabrication d'un tube de transfert de chaleur - Google Patents

Procédé pour la fabrication d'un tube de transfert de chaleur Download PDF

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Publication number
EP0144460A1
EP0144460A1 EP83112439A EP83112439A EP0144460A1 EP 0144460 A1 EP0144460 A1 EP 0144460A1 EP 83112439 A EP83112439 A EP 83112439A EP 83112439 A EP83112439 A EP 83112439A EP 0144460 A1 EP0144460 A1 EP 0144460A1
Authority
EP
European Patent Office
Prior art keywords
tube
grooves
pipe
ribs
produced
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.)
Withdrawn
Application number
EP83112439A
Other languages
German (de)
English (en)
Inventor
Charly Dipl.-Ing. Miret-Azopardo
Hans-Werner Ing. grad. Kästner
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.)
Wieland Werke AG
Original Assignee
Wieland Werke AG
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 Wieland Werke AG filed Critical Wieland Werke AG
Priority to EP83112439A priority Critical patent/EP0144460A1/fr
Publication of EP0144460A1 publication Critical patent/EP0144460A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls
    • B21C37/207—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls with helical guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/02—Making uncoated products
    • B21C23/04—Making uncoated products by direct extrusion
    • B21C23/08—Making wire, bars, tubes
    • B21C23/10—Making finned tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls

Definitions

  • the invention relates to a method for producing a heat transfer tube with helically surrounding ribs formed on the outer surface and having slots, notches or the like running in the radial direction, an outlet tube which is regularly structured on the outer surface being subjected to a deformation process for producing the ribs.
  • the fins are often provided with slots, notches or the like.
  • the structuring of the starting tube is carried out by knurling a smooth tube.
  • the invention is therefore based on the object of designing a method of the type mentioned in such a way that a substantially larger area can be covered with regard to the slot depth.
  • the object is achieved in that the starting tube is produced by an extrusion process, in which grooves extending in the longitudinal direction of the tube are produced on the outer surface.
  • the slot depth can be varied. Compared to the prior art, there is at the same time the advantage that only one process step is required for the production of the structured starting tube.
  • the starting pipe is produced with grooves which open to the outside of the pipe, so that the slots can be formed without problems.
  • the cross section of the grooves is preferably triangular or trapezoidal.
  • the starting tube To control the slot width, it is advisable to produce the starting tube with triangular grooves which have a notch angle ⁇ of 60 to 120 °, a notch angle oc of 90 ° being preferred.
  • the starting tube is produced with grooves which have a groove depth of 0.1 to 2.5 mm.
  • the outlet tube For the common diameter range of the heat transfer tube of approximately 10 to 40 mm, it is advisable to manufacture the outlet tube with 0.1 to 10 grooves per mm of tube circumference.
  • the starting tube is preferably made of aluminum or an aluminum alloy.
  • FIG. 1 the transition from an output pipe 6 with grooves 7 running in the longitudinal direction to the heat transfer pipe 1 is shown at the same time.
  • the cross section through the outlet tube 6 according to FIG. 2a clearly shows the triangular shape of the grooves 7 and the notch angle ⁇ .
  • a press tube 6 with triangular grooves 7 pressed out is then subjected to a fin rolling process in a manner known per se (cf. US Pat. No. 1,865,575), in that the fin material is obtained by displacing material from the tube wall 4 outwards by means of the rolling process and the heat transfer tube is rotated by the rolling forces is displaced and advanced according to the resulting ribs.
  • a device (cf. in particular FIG. 4) is used, which consists of three tool holders 10, in each of which because a rolling tool 11 is integrated. (Only one tool holder 10 is shown in FIG. 4, two tool holders 10 in FIG. 3, but four or more tool holders 10 can also be used, for example.)
  • the tool holders 10 are each offset by 120 ° on the circumference of the tube 6.
  • the tool holder 10 are radially adjustable. For their part, they are arranged in a stationary roller head (not shown).
  • the press tube 6 runs into the device in the direction of the arrow and is rotated by the driven rolling tools 11 arranged on the circumference, the axes of the rolling tools 11 being inclined to the tube axis.
  • the rolling tools 11 consist, in a manner known per se, of a plurality of rolling disks 12 arranged side by side, the diameter of which increases in the direction of the arrow. (Eight rolling disks 12 are indicated in FIG. 4.)
  • the centrally arranged rolling tools 11 form the helically surrounding ribs 2 from the tube wall 4 of the press tube 6 in a known manner, the support being provided by a rolling mandrel 13.
  • the slots 5 are not arranged in an extension of the grooves 7, but instead each follow a helical line, as shown particularly clearly on the right half in FIG.
  • Example: Starting from a cast bolt 8 made of an aluminum alloy (AlMn), a press tube 6 was produced with the following dimensions: outer diameter 23.5 mm, inner diameter 15.0 mm, twenty grooves 7 with a groove depth of 1 mm (notch angle oe 90 °) .
  • a heat transfer tube 1 with the dimensions according to the following table was produced by means of a device according to FIGS. 3 and 4:

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
EP83112439A 1983-12-10 1983-12-10 Procédé pour la fabrication d'un tube de transfert de chaleur Withdrawn EP0144460A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP83112439A EP0144460A1 (fr) 1983-12-10 1983-12-10 Procédé pour la fabrication d'un tube de transfert de chaleur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP83112439A EP0144460A1 (fr) 1983-12-10 1983-12-10 Procédé pour la fabrication d'un tube de transfert de chaleur

Publications (1)

Publication Number Publication Date
EP0144460A1 true EP0144460A1 (fr) 1985-06-19

Family

ID=8190869

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83112439A Withdrawn EP0144460A1 (fr) 1983-12-10 1983-12-10 Procédé pour la fabrication d'un tube de transfert de chaleur

Country Status (1)

Country Link
EP (1) EP0144460A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0292127A2 (fr) * 1987-04-29 1988-11-23 Peerless of America, Incorporated Element à ailettes pour échangeur de chaleur et procédé pour sa production
US5311661A (en) * 1992-10-19 1994-05-17 Packless Metal Hose Inc. Method of pointing and corrugating heat exchange tubing
US5409057A (en) * 1993-01-22 1995-04-25 Packless Metal Hose, Inc. Heat exchange element
US5803128A (en) * 1994-04-28 1998-09-08 Packless Metal Hose, Inc. Braided conduit and method of making a braided conduit
US5813438A (en) * 1994-04-28 1998-09-29 Packless Metal Hose, Inc. Braided conduit and method of making a braided conduit
US9277766B2 (en) 2012-07-31 2016-03-08 Republic Tobacco L.P. Tabletop semi-automatic cigarette-making machine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1865575A (en) * 1928-11-30 1932-07-05 Wolverine Tube Company Apparatus for manufacturing integral finned tubing
CH401876A (fr) * 1962-03-21 1965-11-15 Commissariat Energie Atomique Filière pour former des tubes à ailettes hélicoïdales en partant de tubes à ailettes rectilignes
CH510473A (fr) * 1965-03-29 1971-07-31 Trane Co Elément d'échange de chaleur et procédé pour sa fabrication
US3781959A (en) * 1970-09-02 1974-01-01 Peerless Of America Method of fabricating a finned heat exchanger tube
US3791003A (en) * 1970-02-24 1974-02-12 Peerless Of America Method of frabricating a plural finned heat exchanger
DE2532143A1 (de) * 1974-08-21 1976-03-04 Universal Oil Prod Co Metallischer waermeuebertrager, insbesondere rohr, und verfahren zu seiner herstellung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1865575A (en) * 1928-11-30 1932-07-05 Wolverine Tube Company Apparatus for manufacturing integral finned tubing
CH401876A (fr) * 1962-03-21 1965-11-15 Commissariat Energie Atomique Filière pour former des tubes à ailettes hélicoïdales en partant de tubes à ailettes rectilignes
CH510473A (fr) * 1965-03-29 1971-07-31 Trane Co Elément d'échange de chaleur et procédé pour sa fabrication
US3791003A (en) * 1970-02-24 1974-02-12 Peerless Of America Method of frabricating a plural finned heat exchanger
US3781959A (en) * 1970-09-02 1974-01-01 Peerless Of America Method of fabricating a finned heat exchanger tube
DE2532143A1 (de) * 1974-08-21 1976-03-04 Universal Oil Prod Co Metallischer waermeuebertrager, insbesondere rohr, und verfahren zu seiner herstellung

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0292127A2 (fr) * 1987-04-29 1988-11-23 Peerless of America, Incorporated Element à ailettes pour échangeur de chaleur et procédé pour sa production
EP0292127A3 (en) * 1987-04-29 1989-05-24 Peerless Of America, Inc. Finned heather exchanger tubing with varying wall thickness
US5311661A (en) * 1992-10-19 1994-05-17 Packless Metal Hose Inc. Method of pointing and corrugating heat exchange tubing
US5409057A (en) * 1993-01-22 1995-04-25 Packless Metal Hose, Inc. Heat exchange element
US5551504A (en) * 1993-01-22 1996-09-03 Packless Metal Hose, Inc. Heat exchange element
US5803128A (en) * 1994-04-28 1998-09-08 Packless Metal Hose, Inc. Braided conduit and method of making a braided conduit
US5813438A (en) * 1994-04-28 1998-09-29 Packless Metal Hose, Inc. Braided conduit and method of making a braided conduit
US5819807A (en) * 1994-04-28 1998-10-13 Packless Metal Hose, Inc. Braided conduit and method of making a braided conduit
US9277766B2 (en) 2012-07-31 2016-03-08 Republic Tobacco L.P. Tabletop semi-automatic cigarette-making machine

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19840820

AK Designated contracting states

Designated state(s): AT CH DE FR GB LI SE

17Q First examination report despatched

Effective date: 19860327

R17C First examination report despatched (corrected)

Effective date: 19860616

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19861226

RIN1 Information on inventor provided before grant (corrected)

Inventor name: KAESTNER, HANS-WERNER, ING. GRAD.

Inventor name: MIRET-AZOPARDO, CHARLY, DIPL.-ING.