GB1453526A - Method of and apparatus for controlling depth of fusion in electron- beam welding - Google Patents

Method of and apparatus for controlling depth of fusion in electron- beam welding

Info

Publication number
GB1453526A
GB1453526A GB4064874A GB4064874A GB1453526A GB 1453526 A GB1453526 A GB 1453526A GB 4064874 A GB4064874 A GB 4064874A GB 4064874 A GB4064874 A GB 4064874A GB 1453526 A GB1453526 A GB 1453526A
Authority
GB
United Kingdom
Prior art keywords
signal
welding
weld
fusion
comparator
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
GB4064874A
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.)
Institut Elektrosvarki Imeni E O Patona Akademii Nauk Ukrainskoi Ssr
Original Assignee
Institut Elektrosvarki Imeni E O Patona Akademii Nauk Ukrainskoi Ssr
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 Institut Elektrosvarki Imeni E O Patona Akademii Nauk Ukrainskoi Ssr filed Critical Institut Elektrosvarki Imeni E O Patona Akademii Nauk Ukrainskoi Ssr
Priority to GB4064874A priority Critical patent/GB1453526A/en
Publication of GB1453526A publication Critical patent/GB1453526A/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
    • B23K15/00—Electron-beam welding or cutting
    • B23K15/02—Control circuits therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Welding Or Cutting Using Electron Beams (AREA)

Abstract

1453526 Welding by fusion INST ELEKTRO IM EO PATONA AKAD NAUK UKRAIN SSR 18 Sept 1974 40648/74 Heading B3R [Also in Divisions G1 and G3] The depth of fusion in electron beam welding is controlled by deriving a signal proportional to the scattering of beam electrons due to interaction with metal vapour produced by welding, filtering the signal to obtain a component with a frequency of over 200 c/s, and using the component to control the welding heat input. The method is used in a welding apparatus comprising an electron gun 1 producing a beam 7 which is automatically focused by a coil 6 and unit 8 to give a constant size hot spot on the workpiece 9. The gun comprises a cathode 3, control grid 4 and anode 5, and the whole apparatus is in a vacuum chamber 2. A beam trap 11 collects scattered electrons and produces a signal across resistor 12. A filter 13 blocks the passage of D.C. and frequencies below 200 c/s, and the signal is then amplified, rectified and smoothed before feeding to an indicator or recorder Q and a comparator 17. The latter also receives a reference signal from a source 18 which is adjustable or may vary to give a changing weld depth. The output of the comparator is amplified and fed to the grid 4 to reduce the welding power input if the scatter current is increasing, and vice versa. The recorder Q may be a chart recorder driven at the speed of the workpiece relative to the beam so that a defective weld portion may be quickly located by laying the chart over the weld. It is stated that weld quality is improved if the beam is periodically removed from the workpiece at the frequency of the selected component of the scatter current signal. This may be achieved by use of a further signal fed to an additional beam deflection coil (24, Fig. 5, not shown) or to the grid 4. The further signal is produced by a generator (21) and comprises pulses of a duration determined by the output of the comparator 17 and synchronized with the leading edges of the half waves produced by amplifier 14.
GB4064874A 1974-09-18 1974-09-18 Method of and apparatus for controlling depth of fusion in electron- beam welding Expired GB1453526A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4064874A GB1453526A (en) 1974-09-18 1974-09-18 Method of and apparatus for controlling depth of fusion in electron- beam welding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4064874A GB1453526A (en) 1974-09-18 1974-09-18 Method of and apparatus for controlling depth of fusion in electron- beam welding

Publications (1)

Publication Number Publication Date
GB1453526A true GB1453526A (en) 1976-10-27

Family

ID=10415943

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4064874A Expired GB1453526A (en) 1974-09-18 1974-09-18 Method of and apparatus for controlling depth of fusion in electron- beam welding

Country Status (1)

Country Link
GB (1) GB1453526A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4229639A (en) * 1976-08-19 1980-10-21 Steigerwald Strahltechnik Gmbh Energy beam welding method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4229639A (en) * 1976-08-19 1980-10-21 Steigerwald Strahltechnik Gmbh Energy beam welding method

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Legal Events

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