Accession Number:

AD0294774

Title:

DEVELOPMENT OF AUTOMATIC QUALITY CONTROL FOR RESISTANCE WELDS IN ALUMINUM ALLOYS. PHASE II. MODIFICATION OF CIRCUITRY AND EVALUATION OF A FREEDBACK WELD CONTROL FOR RESISTANCE SPOT WELDING ALUMINUM ALLOYS

Descriptive Note:

Corporate Author:

BUDD CO PHILADELPHIA PA

Personal Author(s):

• HURLEBAUS,RICHARD P.

Report Date:

1962-11-20

Pagination or Media Count:

1.0

Abstract:

Three principles for w ld feedback control of resistance spot welding of aluminum alloys are constant electrode voltage, constant weld current, and weld zone resistance change. The latter principle proved to be the most reliable signal for a feedback system. The weld control circuits for a single phase feedback system were modified to produce a laboratory working model of a control for the three phase welding machine. The weld tests indicated the feedback control corrected for changes in the weld zone resistance, as the weld zone resistance decreased with the weld growth or development. This was in accordance with the correlation that as the weld grew larger the weld zone resistance decreased in a predictable and reliable manner. The weld control system performed satisfactorily during the tests to maintain weld size and strength during a qualification-type weld test. Author

Descriptors:

• *ALUMINUM ALLOYS
• *RESISTANCE WELDING
• *SPOT WELDING
• ALLOYS
• AUTOMATION
• CIRCUITS
• CONTROL
• LABORATORY EQUIPMENT
• MANUFACTURING
• QUALITY CONTROL
• ELECTRICAL RESISTANCE
• SPOT WELDS
• WELDING
• WELDS

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE