GB1309195A - Method of controlling the quality of seam welded product - Google Patents

Method of controlling the quality of seam welded product

Info

Publication number
GB1309195A
GB1309195A GB4582171A GB4582171A GB1309195A GB 1309195 A GB1309195 A GB 1309195A GB 4582171 A GB4582171 A GB 4582171A GB 4582171 A GB4582171 A GB 4582171A GB 1309195 A GB1309195 A GB 1309195A
Authority
GB
United Kingdom
Prior art keywords
welding
tube
stock
welded tube
arc
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
GB4582171A
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.)
Howmet Aerospace Inc
Original Assignee
Aluminum Company of America
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 Aluminum Company of America filed Critical Aluminum Company of America
Publication of GB1309195A publication Critical patent/GB1309195A/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
    • B23K13/00—Welding by high-frequency current heating
    • B23K13/01—Welding by high-frequency current heating by induction heating
    • B23K13/02—Seam welding
    • 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
    • B23K11/24—Electric supply or control circuits therefor
    • B23K11/25—Monitoring devices
    • B23K11/252—Monitoring devices using digital means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
    • G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents

Landscapes

  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Pathology (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Arc Welding In General (AREA)
  • Arc Welding Control (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

1309195 Welding by pressure; making tubes ALUMINUM CO OF AMERICA 1 Oct 1971 [2 Oct 1970] 45821/71 Headings B3A and B3R In a welding process for producing a thin walled longitudinally seamed tube by generating an arc between confronting edges of formed strip stock T at a welding station W and urging the edges together by at least three squeeze rolls S, continuous measurements are made of the pressures applied by the rolls S, of the speed of the strip stock, of eddy currents produced in the welded tube, and of three electrical factors relating to the supply of high frequency electrical power to the arc, and when any one or more of the measured values deviates by a preset amount from values previously determined as producing satisfactory seam welds the particular section of welded tube is identified for subsequent rejection. The welding station is preferably followed by a shearing station at which the welded tube is cut into predetermined lengths and the electrical circuitry is arranged to ensure that a gate is opened to allow the rejection of a substandard section of pipe identified previously by the measurements made in the welding process. Measurements indicating a substandard weld may also be used to actuate physical marking of the tube length by tube marking pens. An additional parameter of the process which may be monitored and used to identify sections of welded tube requiring rejection is the location of and light intensity emitted by the welding are. An impeder is located within the tube stock at the welding station to concentrate the high frequency welding current at the edges of the stock and a controlled flow of coolant serves to maintain the impeder at a constant temperature as a further condition for producing satisfactory weld seams. The three electrical factors which are measured to provide parameters of the arc power supply are the voltage and current on plates of rectifier tubes in the welding apparatus and the current in grid circuits of oscillator tubes therein.
GB4582171A 1970-10-02 1971-10-01 Method of controlling the quality of seam welded product Expired GB1309195A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US7741170A 1970-10-02 1970-10-02

Publications (1)

Publication Number Publication Date
GB1309195A true GB1309195A (en) 1973-03-07

Family

ID=22137893

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4582171A Expired GB1309195A (en) 1970-10-02 1971-10-01 Method of controlling the quality of seam welded product

Country Status (3)

Country Link
DE (1) DE2149538B2 (en)
FR (1) FR2110929A5 (en)
GB (1) GB1309195A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024050127A1 (en) * 2022-09-01 2024-03-07 Cepheid Faulty unit detection system and methods

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2641367C2 (en) * 1976-09-10 1979-04-05 Mannesmann Ag, 4000 Duesseldorf Process for the continuous non-destructive testing of longitudinal or spiral seam welded pipes
CH618899A5 (en) * 1977-06-07 1980-08-29 Erik Allan Olsson
DE3238766A1 (en) * 1982-10-20 1984-04-26 Hoesch Werke Ag METHOD AND DEVICE FOR MONITORING AND / OR REGULATING THE WELDING CURRENT IN HIGH-FREQUENCY RESISTANT PRESSURE WELDING OF LENGTH SEW TUBES
CN115430813B (en) * 2022-08-31 2024-02-13 安阳钢铁股份有限公司 Method for prolonging service life of crystallizer of ultra-wide sheet billet continuous casting machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024050127A1 (en) * 2022-09-01 2024-03-07 Cepheid Faulty unit detection system and methods

Also Published As

Publication number Publication date
DE2149538A1 (en) 1972-04-27
DE2149538B2 (en) 1977-06-02
FR2110929A5 (en) 1972-06-02

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee