GB670574A - Improvements in and relating to the manufacture of finned tubes - Google Patents

Improvements in and relating to the manufacture of finned tubes

Info

Publication number
GB670574A
GB670574A GB22029/47A GB2202947A GB670574A GB 670574 A GB670574 A GB 670574A GB 22029/47 A GB22029/47 A GB 22029/47A GB 2202947 A GB2202947 A GB 2202947A GB 670574 A GB670574 A GB 670574A
Authority
GB
United Kingdom
Prior art keywords
welds
tube
fin
welding
current
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
Application number
GB22029/47A
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.)
Brown Fintube Co
Original Assignee
Brown Fintube 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 Brown Fintube Co filed Critical Brown Fintube Co
Publication of GB670574A publication Critical patent/GB670574A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/002—Resistance welding; Severing by resistance heating specially adapted for particular articles or work
    • B23K11/004—Welding of a small piece to a great or broad piece
    • B23K11/0046—Welding of a small piece to a great or broad piece the extremity of a small piece being welded to a base, e.g. cooling studs or fins to tubes or plates

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

670,574. Making gilled tubes. BROWN FINTUBE CO. Aug. 8, 1947 [March 12, 1940; Feb. 26, 1941], Nos. 22029/47 and 22030/47. Classes 83 (ii) and 83 (iv). [Also in Group XIII] Welding.-In a method of spotwelding radiator fins to metal tubes each weld is made in rapid succession at such a speed that the tube at the welding point is not softened by conduction of heat from the preceding weld. The combined areas of the welds are substantially equal to the cross-sectional area of the fin and the perimetric length of the welds is equal to the total length of the fin. In a machine, Fig. 7, of known construction for carrying out the method a length of tubing is guided into the machine by rolls 42 with channelshaped fin members positioned by rolls 40. Welding rolls 31, 32 with thyratron control for determining the time and duration of the flow of current effect spot-welding at a speed high enough to prevent softening of the tube. As an example, low carbon steel fins 0.031. inch thick are welded to a tube of similar material with an electrode pressure of about 1000 lbs. and current 12000 amps at 6-8 volts. Each weld is made with a duration of current of 3 cycles to 60 cycle single phase A.C., the current being shut off for a period of 3 cycles between the welds. A tube feed of 18-20 ft. per minute being sufficient to prevent the tube being damaged and deformed. The speed of the tube may vary between 12- 20 ft. per minute with 3-12 welded areas per inch. The spot welds may be spaced apart or may overlap to give a welded area with scalloped edges, the combined areas of the welds being substantially equal to the longitudinal cross-sectional area of the fin flanges and the total perimetric length of said welds exceeding the total length of the flanges.
GB22029/47A 1940-03-12 1947-08-08 Improvements in and relating to the manufacture of finned tubes Expired GB670574A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US670574XA 1940-03-12 1940-03-12

Publications (1)

Publication Number Publication Date
GB670574A true GB670574A (en) 1952-04-23

Family

ID=22073445

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22029/47A Expired GB670574A (en) 1940-03-12 1947-08-08 Improvements in and relating to the manufacture of finned tubes

Country Status (1)

Country Link
GB (1) GB670574A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2001160A (en) * 1977-07-13 1979-01-24 Carrier Corp Heat transfer surface and method of manufacture
ES2292343A1 (en) * 2006-03-24 2008-03-01 Fermupe S.L. Welding method for manufacturing of guard rails, involves carrying out welding using electrical resistance of spot welding type for joining each linker or couplings of guard rail with vertical tube

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2001160A (en) * 1977-07-13 1979-01-24 Carrier Corp Heat transfer surface and method of manufacture
GB2001160B (en) * 1977-07-13 1982-10-13 Carrier Corp Heat exchange surface
ES2292343A1 (en) * 2006-03-24 2008-03-01 Fermupe S.L. Welding method for manufacturing of guard rails, involves carrying out welding using electrical resistance of spot welding type for joining each linker or couplings of guard rail with vertical tube

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