JPS57127583A - Method for quality assurance and checking of resistance weld zone - Google Patents

Method for quality assurance and checking of resistance weld zone

Info

Publication number
JPS57127583A
JPS57127583A JP1162681A JP1162681A JPS57127583A JP S57127583 A JPS57127583 A JP S57127583A JP 1162681 A JP1162681 A JP 1162681A JP 1162681 A JP1162681 A JP 1162681A JP S57127583 A JPS57127583 A JP S57127583A
Authority
JP
Japan
Prior art keywords
circuit
voltage
signal
weld zone
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.)
Granted
Application number
JP1162681A
Other languages
Japanese (ja)
Other versions
JPS622915B2 (en
Inventor
Shuji Nakada
Yoshio Kawaguchi
Akira Nishimura
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.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co Ltd
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 Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP1162681A priority Critical patent/JPS57127583A/en
Publication of JPS57127583A publication Critical patent/JPS57127583A/en
Publication of JPS622915B2 publication Critical patent/JPS622915B2/ja
Granted 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
    • B23K11/24—Electric supply or control circuits therefor
    • B23K11/25—Monitoring devices
    • B23K11/252—Monitoring devices using digital means
    • B23K11/258—Monitoring devices using digital means the measured parameter being a voltage

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Arc Welding Control (AREA)

Abstract

PURPOSE:To assure the quality of a weld zone and to check the same surely bt setting a change of the voltage between electrode tips at which the good weld zone is obtainable with time as reference voltage and controlling welding current in such a way that the voltage between the tips is kept within this permissible range. CONSTITUTION:A circuit 5 detects the voltage Vd between electrode tips 2a, 2b momentarily except in the initial period of conduction of electricity. This is compared with the above-described reference voltage Vr changing with time from a circuit 7 in a circuit 6, and a differential signal Sd is emitted. On the other hand, the signal Sr of a circuit 9 is made into Sr' with a circuit 10, and a circuit 8 operates the firing phase angle of a circuit 11 with this and Sd, and a circuit 11 generates firing pulses by the signal S thereof, thereby controlling the primary AC waveform of a transformer 4. When voltage Vd Vr, Sr'=Sr and the circuit 11 is controlled of the firing phase angle in such a way as to flow reference welding current. The voltage V1 of an electric power source 3 and the voltage Vs from a circuit 14 are compared momentarily, and a differential signal Sf is fed to the circuit 10. The circuit 8 corrects the signal S by as much as the signal Sf so that the reference welding current value is prevented from fluctuating despite fluctuation of the voltage V1.
JP1162681A 1981-01-30 1981-01-30 Method for quality assurance and checking of resistance weld zone Granted JPS57127583A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1162681A JPS57127583A (en) 1981-01-30 1981-01-30 Method for quality assurance and checking of resistance weld zone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1162681A JPS57127583A (en) 1981-01-30 1981-01-30 Method for quality assurance and checking of resistance weld zone

Publications (2)

Publication Number Publication Date
JPS57127583A true JPS57127583A (en) 1982-08-07
JPS622915B2 JPS622915B2 (en) 1987-01-22

Family

ID=11783132

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1162681A Granted JPS57127583A (en) 1981-01-30 1981-01-30 Method for quality assurance and checking of resistance weld zone

Country Status (1)

Country Link
JP (1) JPS57127583A (en)

Also Published As

Publication number Publication date
JPS622915B2 (en) 1987-01-22

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