US3625170A - Process of making holes in a plate to be used in a heat exchanger - Google Patents

Process of making holes in a plate to be used in a heat exchanger Download PDF

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Publication number
US3625170A
US3625170A US880568A US3625170DA US3625170A US 3625170 A US3625170 A US 3625170A US 880568 A US880568 A US 880568A US 3625170D A US3625170D A US 3625170DA US 3625170 A US3625170 A US 3625170A
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US
United States
Prior art keywords
recess
tubes
holes
length
row
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.)
Expired - Lifetime
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US880568A
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English (en)
Inventor
Rolv Gunnar Josok
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OLOFSTROM AB
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OLOFSTROM AB
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • 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
    • B21D22/04—Stamping using rigid devices or tools for dimpling
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2225/00—Reinforcing means
    • F28F2225/08—Reinforcing means for header boxes

Definitions

  • an elongated, preferably rectangular recess is pressed for each row of tubes, the recess having a length at least equal to the length of the tube row, a width less than the length of the tube cross section and a depth approximately equal to the height of the collar formed around the edge of each hole, the recess having along its longitudinal sides at the locations of junction of the tubes opposite with the end plate pairwise opposed widened portions corresponding in shape and size to the end portions of the tube cross sections extending outside the longitudinal sides of the recess.
  • a motor car cooler has two spaced distributing and collecting vessels i.e. headers for liquid heat exchanging medium, generally water. These headers are interconnected by one or several rows of tubes of elongated cross section with thin tins in heat transmitting connection with the tubes.
  • the tubes are connected to plates, here called end plates forming the bottom and the top wall of the distribution and collecting headers respectively, or their sidewalls, depending on whether the tubes are vertical or horizontal.
  • the tubes are inserted through correspondingly elongated holes provided in the plates.
  • the sealing is obtained by soldering.
  • the tubes have a flattened i.e. elongated cross section and the holes have correspondingly a length of about 20 mm. and a width of about 2 mm. These holes are formed by drawpunching, which is a simple operation and which automatically provides upstanding edge collars, which are of importance for the tightness and the resistance of the soldered joint.
  • the soldering between the end plates and the tubes can be effected in different manners, e.g., by dipping in a tin bath or melting a tin foil wound around each tube at the inside of the end plate.
  • the thickness of the end plates generally is about 0.5 mm., the height of the collar will evidently be too low at the ends of the elongated holes to permit the formation of a satisfactory soldering joint at this place. If the soldered joint does not become infallibly tight by soldering, which is generally effected in an automatic device, this causes important economical losses since time robbing and costly corrections of the product often have to be made. Such corrections must of course be avoided as far as possible in an automatic manufacturing process.
  • FIG. 1 shows a vertical section through the upper portion of a motor car cooler with vertical tubes seen from the front side.
  • FIG. 2 shows a portion of an end plate seen from above when positioned as in FIG. 1 but before punching the holes for the tubes.
  • FIG. 3 shows a cross section taken along line Ill-III in FIG. 2.
  • FIG. 4 shows the end plate according to FIG. 2 after the punching of the holes.
  • FIG. 5 shows a cross section taken along line V-V in FIG. 4.
  • the cooler has a distribution header 1 with an inlet 2, a row of tubes 3 with fins 4 and an upper end plate 5, which in this case forms the bottom wall of the distribution header 1.
  • the tubes have a flattened cross section and are turned with their flat sides towards each other. They are inserted through holes 6 in the end plate. The holes have collars 7 along their edges.
  • the tubes are united to the end plate by soldering.
  • an elongated recess 8 is pressed therein as shown in FIGS. 2 and 3.
  • the cooler has two rows of tubes and the end plate is therefore provided with two of such pressed-in recesses 8.
  • Each recess is rectangular and at least as long as the appertaining row of tubes. In the drawing the recess is shown to be a little longer than the tube row. The recess is further placed symmetrically with the tube row.
  • the width of the recesses 8 is less than the length of the cross section of the tubes, but along both sides the recess has widened portions 9 placed in pairs opposite each other in the places where the tubes are to be inserted and where the holes thus are to be punched.
  • widened portions correspond in shape and dimension to the portions of the length of the tube section which project past the width of the recess. It has been found advantageous to give the recess a width of about 60 to percent of the length of the tube section. Its depth and even that of the widened portions, is about equal to the desired height of the collar, which is to be formed around the holes finally punched.
  • the pressing operation described above can be effected to the necessary depth in one single pressing operation without fissures appearing at the widened portions 9.
  • the end portions 10 of the collars are thus formed to the desired height without ruptures.
  • FIG. 4 shows the end plate after the punching of the holes.
  • a collar 7 is formed around the hole, which has the desired and continuous height even at the ends of the holes.
  • the invention is not limited to motor car coolers but can also be used in connection with any other heat exchanger of similar type.
  • said recess having a length at least equal to the length of the tube row, a width less than the length of the elongated tube section and a depth approximately equal to the desired height of the hole collar, said elongated recess also including along the opposite longitudinal sides, and at those places where the tubes are to be located, widened portions located opposite each other in pairs and corresponding in shape and dimensions to those portions of the ends of the tube sections projecting out- 5 side the longitudinal sides of said pressed-in recess, and draw-punching the holes along the recess at the paired widened portions.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US880568A 1968-12-03 1969-11-28 Process of making holes in a plate to be used in a heat exchanger Expired - Lifetime US3625170A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE16479/68A SE326681B (enrdf_load_stackoverflow) 1968-12-03 1968-12-03

Publications (1)

Publication Number Publication Date
US3625170A true US3625170A (en) 1971-12-07

Family

ID=20302307

Family Applications (1)

Application Number Title Priority Date Filing Date
US880568A Expired - Lifetime US3625170A (en) 1968-12-03 1969-11-28 Process of making holes in a plate to be used in a heat exchanger

Country Status (5)

Country Link
US (1) US3625170A (enrdf_load_stackoverflow)
DE (1) DE1959913A1 (enrdf_load_stackoverflow)
FR (1) FR2025095B1 (enrdf_load_stackoverflow)
GB (1) GB1240749A (enrdf_load_stackoverflow)
SE (1) SE326681B (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4400965A (en) * 1980-03-27 1983-08-30 Modine Manufacturing Company Forming integral flanges in a sheet apparatus therefore
EP0845650A3 (en) * 1996-11-29 1999-05-12 Denso Corporation Heat exchanger assembled without brazing in which adhesive is used to seal tube end portions and an end plate
WO2007113320A1 (en) * 2006-04-05 2007-10-11 Valeo Termico S.A. Heat exchanger for gases, especially exhaust gases from an engine
US20240085116A1 (en) * 2021-03-31 2024-03-14 Mitsubishi Electric Corporation Heat exchanger

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4373369A (en) * 1980-03-27 1983-02-15 Modine Manufacturing Company Method of forming integral flanges in a sheet
AU610938B2 (en) * 1987-10-21 1991-05-30 Sanyo Radiator Co., Ltd. Plate-fin type radiator
IT1280900B1 (it) * 1995-08-07 1998-02-11 Borletti Climatizzazione Procedimento per la produzione di uno scambiatore di calore, in particolare per la produzione di un condensatore per sistemi di
US5898996A (en) * 1997-09-05 1999-05-04 General Motors Corporation Method of forming a cylindrical heat exchanger header tank
CN106334740B (zh) * 2016-08-19 2017-11-17 西北有色金属研究院 一种细径薄壁金属管材表面加工凹形结构的装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2091593A (en) * 1935-11-04 1937-08-31 Borg Warner Radiator
CA621332A (en) * 1961-06-06 W. Kritzer Richard Method of making and heat transfer units
US3182483A (en) * 1962-01-23 1965-05-11 Karmazin Prod Apparatus and method for manufacturing tube sections for heat exchangers
US3211118A (en) * 1962-12-20 1965-10-12 Borg Warner Heat exchanger

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA621332A (en) * 1961-06-06 W. Kritzer Richard Method of making and heat transfer units
US2091593A (en) * 1935-11-04 1937-08-31 Borg Warner Radiator
US3182483A (en) * 1962-01-23 1965-05-11 Karmazin Prod Apparatus and method for manufacturing tube sections for heat exchangers
US3211118A (en) * 1962-12-20 1965-10-12 Borg Warner Heat exchanger

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4400965A (en) * 1980-03-27 1983-08-30 Modine Manufacturing Company Forming integral flanges in a sheet apparatus therefore
EP0845650A3 (en) * 1996-11-29 1999-05-12 Denso Corporation Heat exchanger assembled without brazing in which adhesive is used to seal tube end portions and an end plate
US6082439A (en) * 1996-11-29 2000-07-04 Denso Corporation Heat exchanger assembled without brazing in which adhesive is used to seal a combined portion and a core plate
WO2007113320A1 (en) * 2006-04-05 2007-10-11 Valeo Termico S.A. Heat exchanger for gases, especially exhaust gases from an engine
US20240085116A1 (en) * 2021-03-31 2024-03-14 Mitsubishi Electric Corporation Heat exchanger
US12339070B2 (en) * 2021-03-31 2025-06-24 Mitsubishi Electric Corporation Heat exchanger

Also Published As

Publication number Publication date
FR2025095A1 (enrdf_load_stackoverflow) 1970-09-04
SE326681B (enrdf_load_stackoverflow) 1970-08-03
GB1240749A (en) 1971-07-28
DE1959913A1 (de) 1970-06-18
FR2025095B1 (enrdf_load_stackoverflow) 1975-12-12

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