US3648344A - Process of fabricating a radiator core - Google Patents

Process of fabricating a radiator core Download PDF

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Publication number
US3648344A
US3648344A US46033A US3648344DA US3648344A US 3648344 A US3648344 A US 3648344A US 46033 A US46033 A US 46033A US 3648344D A US3648344D A US 3648344DA US 3648344 A US3648344 A US 3648344A
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US
United States
Prior art keywords
fins
pack
holes
plates
pipes
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
Application number
US46033A
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English (en)
Inventor
Andre Chartet
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.)
Chausson Usines SA
Original Assignee
Chausson Usines SA
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 Chausson Usines SA filed Critical Chausson Usines SA
Application granted granted Critical
Publication of US3648344A publication Critical patent/US3648344A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
    • F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49366—Sheet joined to sheet
    • Y10T29/49368—Sheet joined to sheet with inserted tubes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49904—Assembling a subassembly, then assembling with a second subassembly

Definitions

  • This invention relates to a novel process for the manufacture of cooling radiator cores making possible for the making of fins working as secondary exchange surfaces, to use metal sheets fairly thinner than those used heretofore, thereby allowing substantial savings of metal and lowering the weight of the core thus obtained, though said core presents improved thennic and mechanical strength characteristics as compared with those currently manufactured.
  • the process is characterized in that holes delimiting the outlet of pipes are punched into thin plates intended to form fins, said holes having dimensions slightly larger than those of the pipes of the core to be manu factured, and wherein the fins are alternately joined together according to alternate groups of two by a transverse connection, said connection being staggered from a group to another group of fins which are assembled after the carrying out of said connection into a pack in the holes of which the pipes of the core are inserted, and wherein, further, the fins are unfolded by exerting a pull at least upon the end-fins of the pack of fins, so as they are so strained as to take a honeycomb structure while the side edges of the holes thereof are applied against the pipe walls and strained in such way as to form support flanges.
  • the invention also relates to the product obtained by the above-described process, i.e., to radiators including a core made according to said process.
  • FIG. l is a layout of radiator fins showing a particular feature of the invention.
  • FIG. 2 is a front elevational view, showing a particular feature of an embodiment of the invention.
  • FIG. 3 shows a manufacturing stage of a radiator core according to the invention.
  • FIG. 4 is a partial elevational view, at a larger scale, showing another manufacturing stage.
  • FIG. 5 is an explanatory elevational view, at a larger scale, showing a specific result obtained according to the invention.
  • radiator core fins On FIG. 1 are shown radiator core fins, said fins being arranged into two separate groups respectively referenced by 1 and 2.
  • the fins of each group are all manufactured along the same process from thin sheets of metal wherein holes 3 are punched serving as outlet apertures for pipes 4 (FIGS. 3 to 5) which are designed to form a radiator core when assembled with said fins.
  • Holes 3 intended to pipe outlets, have a shape corresponding with that of the pipes, a roughly rectangular shape in the case of flat pipes, for instance.
  • the dimensions of said holes 3 are slightly larger than the outer dimensions of the pipes, so as to allow said pipes to be fitted in the fins without friction or with gentle friction, as described hereunder.
  • One of the stage of the invention consists in assembling together the constituent fins of each fin groups l-2 and also in assembling together the fin groups between them.
  • Various processes may be used for this purpose.
  • Strips of glue 5, for in stance, stretching transversally, are laid over fins of groups ll preferably from the leading edge to the trailing edge thereof, said strips of glue being set in the interval between holes 3, but however by overrunning one interval at each step.
  • strips of glue 5a are laid as indicated above, but in shifting said strips of glue 5a by half a pitch, as shown on FIG. 1.
  • strips of glue 5-50 are staggered in alternate rows.
  • strips of glue 5b are also laid along the tip short sides of the fins, except, possibly, along the two end-fins of the radiator core to be manufactured. All the fins are thereafter joined together by pressing them so as to ensure the mutual assembly thereof along strips of glue 5, 5a and 5b.
  • the assembly for the making up of a pack of fins which is 5 joined as described above, may obviously be carried out by other means than strips of glue.
  • bonds may easily be carried out according to many different processes, by means of soft welding, for instance, or by brazing, or also by coldforging, after coating the rough shapes intended to form the fins with a suitable ink, excepting the parts of said rough shapes to be joined, and by subjecting then the pack of fins to a rolling.
  • FIG. 2 Another process is shown on FIG. 2, according which at the time holes 3 are punched, by means of a press, for instance, the fins are slightly corrugated in such way as they will show alternate support parts 6, the corrugations having a very small amplitude and the support parts 6 being strictly aligned, as shown on said figure.
  • Support parts 6 are thereafter welded together by means of an electronic bombardment by passing the pack of assembled fins under an electron gun, thereby allowing to obtain a rough shape of a pack of fins quite satisfactory for the next manufacturing stages.
  • pipes 4 are set in position, which can be made very easily since, as indicated above, holes 3 have larger dimensions than the pipes.
  • FIG. 4 shows the next manufacturing stage which consists, by means of suitable combs, in the unfolding of the pack of fins inserted over the pipes in such way that said pack of fins will form thereby a honeycomb structure.
  • FIG. 5 shows that during the unfolding of the fins, side edges 30,3! of holes 3 come into contact with the wall of each tube 4. Thereafter, as the unfolding is carried on, and owing to the extreme thinness of the fins, ranging about a few hundredth of a millimeter, said edges 30, 3b are strained in order to form flanges 3c, 3d which are thereby tightened by compression on the walls of pipes 41, once the pack of fins is entirely unfolded. In order to make the shaping of the flanges 3c, 3d still easier, it is recommended, as shown on FIG. I, to work out cutting up scarfs 7 at the edge tips 3a, 3b of each hole 3. As a matter of fact, the metal is thereby folded more easily and particularly more evenly all along said side edges 3a., 3b which delimit each hole 3.
  • the core is made as described above, it only remains to secure tightness between the tips of pipes 41 and the collectors, such as 8, which may be performed according to any ordinary engineering process, by means of flexible joints for instance, or also, by means of a thermic treatment ensuring the fastening by welding.
  • This latter process is particularly recommended in the case the fins are fastened together, as explained on FIG. 2, by electron beams welding at the resting part 6 thereof, because in this case, the welding of the collectors and even that of flanges 3c, 3d, formed when the pack of fins is unfolded, may be easily performed by means of soft welding.
  • a process for the manufacturing of radiators pipe cores comprising punching holes delimiting the outlet of pipes into thin metal plates from which the fins will be formed, said holes having dimensions slightly larger than those of the pipes of the core to be manufactured, alternately joining said plates together to from alternate groups of two by means of a transverse connection, said connection being staggered from one group to another group of said plates, assembling together a plurality of said alternate groups of plates to define a pack having aligned holes, inserting the pipes of the core into said aligned holes in said pack, and unfolding the plates so as to define the fins by exerting a pull at least upon the end plates of the pack of plates, so as to strain the assembly and thus produce a honeycomb structure having the side edges of the holes therethrough are applied against the pipe walls and being strained in such way as to form support flanges.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US46033A 1969-06-18 1970-06-15 Process of fabricating a radiator core Expired - Lifetime US3648344A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6920355A FR2045194A5 (enExample) 1969-06-18 1969-06-18

Publications (1)

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US3648344A true US3648344A (en) 1972-03-14

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ID=9035972

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US46033A Expired - Lifetime US3648344A (en) 1969-06-18 1970-06-15 Process of fabricating a radiator core

Country Status (6)

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US (1) US3648344A (enExample)
BE (1) BE751506A (enExample)
DE (1) DE2030063A1 (enExample)
ES (1) ES380785A1 (enExample)
FR (1) FR2045194A5 (enExample)
GB (1) GB1313604A (enExample)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3874053A (en) * 1972-10-18 1975-04-01 Philips Corp Method of manufacturing a radiator
JPS53123566U (enExample) * 1977-03-07 1978-10-02
JPS543656U (enExample) * 1977-06-13 1979-01-11
WO2020183124A1 (en) * 2019-03-08 2020-09-17 Encocam Limited Heat exchanger with tubes and honeycomb-structured fins and its manufacturing method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2528961A1 (fr) * 1982-06-17 1983-12-23 Chausson Usines Sa Procede de fabrication d'echangeurs multitubulaires et echangeur obtenu par ce procede
FR2722563B1 (fr) * 1994-07-15 1996-09-06 Valeo Thermique Moteur Sa Tube a section transversale oblongue pour echangeur de chaleur

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1220744A (en) * 1916-07-25 1917-03-27 Herbert Champion Harrison Process of making radiator-cores.
US2815795A (en) * 1955-02-16 1957-12-10 Armstrong Cork Co Honeycomb core material and method of fabricating the same
US2999306A (en) * 1956-11-19 1961-09-12 Reynolds Metals Co Hot pressure welded honeycomb passageway panels and like structures
US3512238A (en) * 1965-02-26 1970-05-19 Aluminium Francais & Cie Gener Method for fabricating radiators

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1220744A (en) * 1916-07-25 1917-03-27 Herbert Champion Harrison Process of making radiator-cores.
US2815795A (en) * 1955-02-16 1957-12-10 Armstrong Cork Co Honeycomb core material and method of fabricating the same
US2999306A (en) * 1956-11-19 1961-09-12 Reynolds Metals Co Hot pressure welded honeycomb passageway panels and like structures
US3512238A (en) * 1965-02-26 1970-05-19 Aluminium Francais & Cie Gener Method for fabricating radiators

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3874053A (en) * 1972-10-18 1975-04-01 Philips Corp Method of manufacturing a radiator
JPS53123566U (enExample) * 1977-03-07 1978-10-02
JPS543656U (enExample) * 1977-06-13 1979-01-11
WO2020183124A1 (en) * 2019-03-08 2020-09-17 Encocam Limited Heat exchanger with tubes and honeycomb-structured fins and its manufacturing method
GB2582016B (en) * 2019-03-08 2021-12-01 Encocam Ltd Heat exchanger

Also Published As

Publication number Publication date
ES380785A1 (es) 1972-09-16
BE751506A (fr) 1970-11-16
DE2030063A1 (de) 1971-01-07
GB1313604A (en) 1973-04-18
FR2045194A5 (enExample) 1971-02-26

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