FR2255137A1 - Beam control for electron beam welder - has beam focus and stability controlled by periodically deflecting beam - Google Patents

Beam control for electron beam welder - has beam focus and stability controlled by periodically deflecting beam

Info

Publication number
FR2255137A1
FR2255137A1 FR7345530A FR7345530A FR2255137A1 FR 2255137 A1 FR2255137 A1 FR 2255137A1 FR 7345530 A FR7345530 A FR 7345530A FR 7345530 A FR7345530 A FR 7345530A FR 2255137 A1 FR2255137 A1 FR 2255137A1
Authority
FR
France
Prior art keywords
focus
probe
coils
welder
control
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.)
Granted
Application number
FR7345530A
Other languages
French (fr)
Other versions
FR2255137B1 (en
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 FR7345530A priority Critical patent/FR2255137A1/en
Publication of FR2255137A1 publication Critical patent/FR2255137A1/en
Application granted granted Critical
Publication of FR2255137B1 publication Critical patent/FR2255137B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
    • H01J37/02—Details
    • H01J37/21—Means for adjusting the focus
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
    • H01J37/02—Details
    • H01J37/04—Arrangements of electrodes and associated parts for generating or controlling the discharge, e.g. electron-optical arrangement or ion-optical arrangement
    • H01J37/147—Arrangements for directing or deflecting the discharge along a desired path
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
    • H01J37/30—Electron-beam or ion-beam tubes for localised treatment of objects
    • H01J37/304—Controlling tubes by information coming from the objects or from the beam, e.g. correction signals

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Welding Or Cutting Using Electron Beams (AREA)

Abstract

An electron gun produces a collimated and accelerated beam of electrons via the collimator and accelerating anode respectively. The beam is focussed onto a workpiece by coils and is deflectable by further coils. A water cooled probe (or a Faraday slit) is positioned adjacent the beam and, by a periodic signal generated as a saw tooth wave by the generator, the beam is periodically deflected across the probe. The dwell time of the beam on the probe is a signal proportional to the dia. of the beam and hence its focus. The current induced in the probe is compared with a reference signal from a generator and the beam focus adjusted accordingly by an operational amplifier acting on the focus coils.
FR7345530A 1973-12-19 1973-12-19 Beam control for electron beam welder - has beam focus and stability controlled by periodically deflecting beam Granted FR2255137A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7345530A FR2255137A1 (en) 1973-12-19 1973-12-19 Beam control for electron beam welder - has beam focus and stability controlled by periodically deflecting beam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7345530A FR2255137A1 (en) 1973-12-19 1973-12-19 Beam control for electron beam welder - has beam focus and stability controlled by periodically deflecting beam

Publications (2)

Publication Number Publication Date
FR2255137A1 true FR2255137A1 (en) 1975-07-18
FR2255137B1 FR2255137B1 (en) 1978-08-11

Family

ID=9129462

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7345530A Granted FR2255137A1 (en) 1973-12-19 1973-12-19 Beam control for electron beam welder - has beam focus and stability controlled by periodically deflecting beam

Country Status (1)

Country Link
FR (1) FR2255137A1 (en)

Also Published As

Publication number Publication date
FR2255137B1 (en) 1978-08-11

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Legal Events

Date Code Title Description
ST Notification of lapse