GB2014331A - Flash Welders - Google Patents

Flash Welders

Info

Publication number
GB2014331A
GB2014331A GB7839773A GB7839773A GB2014331A GB 2014331 A GB2014331 A GB 2014331A GB 7839773 A GB7839773 A GB 7839773A GB 7839773 A GB7839773 A GB 7839773A GB 2014331 A GB2014331 A GB 2014331A
Authority
GB
United Kingdom
Prior art keywords
voltage
comparator
potentiometer
source
platen
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.)
Withdrawn
Application number
GB7839773A
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.)
Wean United Inc
Original Assignee
Wean United Inc
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 Wean United Inc filed Critical Wean United Inc
Publication of GB2014331A publication Critical patent/GB2014331A/en
Withdrawn legal-status Critical Current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
    • B23K11/04—Flash butt welding
    • B23K11/043—Flash butt welding characterised by the electric circuits used therewith
    • 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
    • B23K11/241—Electric supplies
    • B23K11/246—Electric supplies for flash welding

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Arc Welding Control (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

An electrical control terminates the upset current of a flash welding process as a function of platen position. It comprises an operational amplifier which is used as a comparator. Voltage from a first source is fed to the comparator, this voltage being adjustable to provide for termination of the upset current at a selected position of the movable platen of the flash welder. Voltage from a second source is impressed upon a potentiometer and this voltage is varied in magnitude as the movable platen moves toward its closed position on the stationary platen. The variable voltage from the potentiometer is also fed into the comparator. When the algebraic sum of the voltage from the potentiometer and offset voltage of the comparator becomes of a magnitude (more or less) than the adjusted voltage from the first source, the comparator acts in the manner of a precision switch to set into operation means to terminate the upset current. <IMAGE>
GB7839773A 1978-02-08 1978-10-09 Flash Welders Withdrawn GB2014331A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US87601078A 1978-02-08 1978-02-08

Publications (1)

Publication Number Publication Date
GB2014331A true GB2014331A (en) 1979-08-22

Family

ID=25366784

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7839773A Withdrawn GB2014331A (en) 1978-02-08 1978-10-09 Flash Welders

Country Status (6)

Country Link
BE (1) BE874044A (en)
DE (1) DE2904414A1 (en)
FR (1) FR2416765A1 (en)
GB (1) GB2014331A (en)
IN (1) IN150364B (en)
IT (1) IT1164932B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2457736A1 (en) * 1979-05-29 1980-12-26 Inst Po Stroitelstvu Magistral Flash butt welding machine - with sensors for all parameters affecting weld quality (OE 15.6.80)
FR2481172A1 (en) * 1980-04-23 1981-10-30 Matix Ind Flash butt welding machine, esp. for railway rails - where hydraulic circuit contg. adjustable control valves is used to adjust welding gap between rails

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3706316C2 (en) * 1987-02-27 1994-07-21 Stahlberg Roensch Gmbh & Co Kg Process for flash butt welding of parts to be butted together

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE693189C (en) * 1936-09-01 1940-07-03 Siemens Schuckertwerke Akt Ges Automatically controlled drive device for electrical flash welding machines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2457736A1 (en) * 1979-05-29 1980-12-26 Inst Po Stroitelstvu Magistral Flash butt welding machine - with sensors for all parameters affecting weld quality (OE 15.6.80)
FR2481172A1 (en) * 1980-04-23 1981-10-30 Matix Ind Flash butt welding machine, esp. for railway rails - where hydraulic circuit contg. adjustable control valves is used to adjust welding gap between rails

Also Published As

Publication number Publication date
FR2416765A1 (en) 1979-09-07
IT7967274A0 (en) 1979-02-07
BE874044A (en) 1979-08-08
DE2904414A1 (en) 1979-08-09
IN150364B (en) 1982-09-18
IT1164932B (en) 1987-04-15

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)