EP0478507A1 - Procédé et dispositif pour la fabrication d'échangeurs de chaleur - Google Patents

Procédé et dispositif pour la fabrication d'échangeurs de chaleur Download PDF

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Publication number
EP0478507A1
EP0478507A1 EP91810765A EP91810765A EP0478507A1 EP 0478507 A1 EP0478507 A1 EP 0478507A1 EP 91810765 A EP91810765 A EP 91810765A EP 91810765 A EP91810765 A EP 91810765A EP 0478507 A1 EP0478507 A1 EP 0478507A1
Authority
EP
European Patent Office
Prior art keywords
tubes
plate
support
tube
expanding mandrel
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.)
Granted
Application number
EP91810765A
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German (de)
English (en)
Other versions
EP0478507B1 (fr
Inventor
Rudolf Lüthi
Walter Pauli
Roland Krebs
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.)
Styner and Bienz AG
Original Assignee
Styner and Bienz 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 Styner and Bienz AG filed Critical Styner and Bienz AG
Publication of EP0478507A1 publication Critical patent/EP0478507A1/fr
Application granted granted Critical
Publication of EP0478507B1 publication Critical patent/EP0478507B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B21D53/08—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal
    • B21D53/085—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of both metal tubes and sheet metal with fins places on zig-zag tubes or parallel tubes

Definitions

  • the present invention relates to a method for producing heat exchangers, wherein tubes are inserted into a plate pack and then each tube is expanded by means of an expanding mandrel.
  • the usual methods of this type have certain disadvantages, which are related in particular to the fact that the tubes change their length when they are expanded, and are generally shortened. This can result in the lamellae of the stack being pushed forward due to the change in length of the tubes and thus the individual lamellae or the stack being damaged.
  • the tubes used do not have absolutely the same dimensions and therefore experience unequal length changes during expansion.
  • the aim of the present invention is to overcome the difficulties and disadvantages mentioned.
  • This goal is achieved in that the pipes are pressurized during the expansion in such a way that they are shortened to a predetermined dimension.
  • a support is moved for the one pipe end against the direction of travel of the expanding mandrel through the pipe, namely at a predetermined speed or by a predetermined path in relation to the speed or the path of the expanding mandrel.
  • the invention also relates to a plant for carrying out the method.
  • Figure 1 shows a package of heat exchanger fins 1, which are provided with openings which are delimited by curved collars 2.
  • the lamellae are stacked at a certain mutual distance from one another and rigidly clamped between two plates 3 and 4.
  • the successive openings or collars 2 of the lamellae each form a channel passing through the entire package, and the plates 3 and 4 are provided with holes 5 and 6, each of which lies in front of a channel of the lamella package 1.
  • the plate 4 is preceded by a further plate 7 with holes 8, the diameter of the holes 8 being smaller than the diameter of the holes 5 and 6.
  • Expansion mandrels 10 each with an expansion head 11, are used for expansion, and these expansion mandrels 10 can be pushed through the tubes 9 by means of a common drive, in particular a spindle drive, in order to expand these tubes so much that they collide with the collars 2 of the lamellae 1 pressed and firmly connected to the same.
  • the pressure acting on the tubes 9 from the expanding mandrels 10 is absorbed by a support plate 12 on which the tubes 9 are supported.
  • This support plate 12 is also provided with holes 13, which are dimensioned such that a driver 14 detachably coupled to the front end of the expanding mandrel 10 can pass through.
  • the support plate 12 is not arranged rigidly, but can be moved in the direction of the arrow against the pressure direction of the expanding mandrels 10. It can also be moved transversely to the longitudinal direction of the tubes 9.
  • a prepared tube 9 ' is shown on the right whose front end has a rolled constriction 15, and in which a driver 14 is inserted.
  • the constriction 15 and the driver 14 are dimensioned such that a new tube can be drawn into a plate pack 1 from a magazine (not shown) by means of this driver.
  • the plate pack 1 is not only rigidly clamped in the stacking direction between the plates 3 and 4, but it is also clamped practically rigid in the transverse direction.
  • Figure 2 shows a view of the plate pack with tubes 9 with plates 3 and 12 removed.
  • the plate pack 1 is clamped between a lower support 18 and an upper clamping frame with transverse profiles 16 and longitudinal profiles 17, which is pressed onto the plate pack by means of clamping means (not shown).
  • the support 18 has lateral support profiles 19 for the plate pack 1. It is thus ensured that the plate pack does not buckle under the considerable pressure of all expanding mandrels 10 which are active at the same time.
  • FIG. 1 shows the operating state during the expansion of the tubes, only one tube 9 with its expanding mandrel 10 being shown in FIG. But actually At the same time, the number of pipes expanded, as shown for example in FIG.
  • the expanding mandrel 10 with the expanding head 11 is advanced from left to right in FIG. 1, the expanding head 11 progressively expanding the tube and pressing it against the fins 1.
  • the tube 9 is shortened by the pressure in the longitudinal direction and the plastic deformation in the region of the expansion head 11, this shortening being somewhat dependent on the tolerances of the tube.
  • This shortening of the tube 9, which occurs anyway, but is not completely controllable, is now converted according to the invention into a controlled shortening by moving the support plate 12, which absorbs the pressure exerted on the tubes in the longitudinal direction, to the left in FIG.
  • This movement takes place in a rigid speed ratio to the rate of penetration of the expanding mandrels 10, the speed of the plate, for example in the case of aluminum tubes, corresponding to 1.5 to 2.5% of the rate of penetration of the expanding mandrels 10.
  • the speed or the path of the support plate 12 is dimensioned such that this path is in any case greater than the shortening of the tube 9 which occurs anyway.
  • the tube 9 is therefore constantly under additional pressure during expansion by the advance of the support plate 12 set, which increases the plastic shortening of the tube to a predetermined value given by the path of the support plate 12.
  • this has the double advantage that, on the one hand, all the pipes are brought to the same length, or protrude exactly the same distance from the plate pack 1, namely on the one hand up to the plate 7 and on the other hand up to the plate 12.
  • the expansion of the tube takes place up to the front end supported on the plate 12 by the coupling member 14 passing through the hole 13 in the support plate 12 and the expansion head 11 also so far can penetrate into the hole 13 that he widens the tube 9 to the end.
  • the expanding mandrel is fully retracted behind the plate 7, whereupon the plate pack with the retracted tubes 9 is removed and replaced by a new plate pack. If the new disk pack is rigidly clamped again in the manner described, all expanding mandrels 10 are pushed forward together after the coupling member 14 has been removed therefrom. Here, the support plate 12 is extended up or down in the direction of its plane, so that the expanding mandrels can be pushed freely up to the bar magazine. There, all expanding mandrels are then coupled, each with a coupling member 14, and then withdrawn in order to pull a new tube into the disk pack 1 with the coupling element 14.
  • the pipes are subjected to tension and, if necessary, are straightened in the plate pack.
  • the tubes 9 are drawn in until the expansion head 11 with its largest diameter is at the level of the inner surface (on the right in FIG. 1) of the plate 7.
  • the support plate 12 is brought back into the operating position shown and is placed against the pipe ends. All pipes are placed under pressure pre-stress, regardless of small differences in length, such that their ends are slipped over the expansion head 11 and thereby widened until they are in contact with the plate 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automatic Assembly (AREA)
EP19910810765 1990-09-28 1991-09-27 Procédé et dispositif pour la fabrication d'échangeurs de chaleur Expired - Lifetime EP0478507B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH313490A CH681565A5 (fr) 1990-09-28 1990-09-28
CH3134/90 1990-09-28

Publications (2)

Publication Number Publication Date
EP0478507A1 true EP0478507A1 (fr) 1992-04-01
EP0478507B1 EP0478507B1 (fr) 1995-03-29

Family

ID=4249354

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910810765 Expired - Lifetime EP0478507B1 (fr) 1990-09-28 1991-09-27 Procédé et dispositif pour la fabrication d'échangeurs de chaleur

Country Status (3)

Country Link
EP (1) EP0478507B1 (fr)
CH (1) CH681565A5 (fr)
DE (1) DE59105043D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004087348A1 (fr) * 2003-04-01 2004-10-14 Applied Systems Management Limited Procede et machine pour la formation d'ailettes sur des tubes
CZ301687B6 (cs) * 2008-11-14 2010-05-26 Lapácek@František Zalisovaný spoj trubky a lamely otopného telesa, zpusob jeho výroby a nástroj k provádení tohoto zpusobu

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4343820A1 (de) * 1993-12-22 1995-06-29 Behr Gmbh & Co Vorrichtung zum mechanischen Aufweiten von metallischen Rohren

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3457620A (en) * 1967-03-23 1969-07-29 Roland A Ares Method of making a prestressed heat exchanger
GB2157986A (en) * 1984-04-30 1985-11-06 Carrier Corp Expanding u-tubes into stacked fins and tube plates
US4597171A (en) * 1983-09-09 1986-07-01 Hitachi, Ltd. Tube-enlarging press for use in heat exchanger fabrication
US4734969A (en) * 1986-10-16 1988-04-05 Carrier Corporation Floating rod lacer for automatic coil assembly
US4780955A (en) * 1987-05-20 1988-11-01 Crown Unlimited Machine, Inc. Apparatus for making a tube and fin heat exchanger

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3457620A (en) * 1967-03-23 1969-07-29 Roland A Ares Method of making a prestressed heat exchanger
US4597171A (en) * 1983-09-09 1986-07-01 Hitachi, Ltd. Tube-enlarging press for use in heat exchanger fabrication
GB2157986A (en) * 1984-04-30 1985-11-06 Carrier Corp Expanding u-tubes into stacked fins and tube plates
US4734969A (en) * 1986-10-16 1988-04-05 Carrier Corporation Floating rod lacer for automatic coil assembly
US4780955A (en) * 1987-05-20 1988-11-01 Crown Unlimited Machine, Inc. Apparatus for making a tube and fin heat exchanger

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004087348A1 (fr) * 2003-04-01 2004-10-14 Applied Systems Management Limited Procede et machine pour la formation d'ailettes sur des tubes
GB2415156A (en) * 2003-04-01 2005-12-21 Applied Systems Man Ltd Tube finning machine and method
CZ301687B6 (cs) * 2008-11-14 2010-05-26 Lapácek@František Zalisovaný spoj trubky a lamely otopného telesa, zpusob jeho výroby a nástroj k provádení tohoto zpusobu

Also Published As

Publication number Publication date
EP0478507B1 (fr) 1995-03-29
CH681565A5 (fr) 1993-04-15
DE59105043D1 (de) 1995-05-04

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