AIA/NAS 981-2012 pdf download GAS TUNGSTEN ARC (GTA) SPOT WELDING EQUIPMENT
Purpose
This specification provides a standard for the manu-facture，performance,inspection，reliability,andprocurement of an inert gas tungsten arc spot weldingsystem. This standard lists minimum requirements andis not limited to design advances.
Classification
This machine shall be of the following type, size andclass.
Type
Constant Current (DCSP)
Size
The maximum rated output shall be not less than 300amperes at 100% duty cycle.
Class
General Purpose – Manual and Mechanized (GTA)
Intended Use
The welding system described by this specification isintended for use primarily in the aerospace manufacturingindustry. It provides performance criteria for inert-gastungsten arc spot welding of materials including,but notlimited to,titanium and titanium alloys,nickel andcobalt alloys,and ferrous alloys.
APPLICABLESPECIFICATIONS，CODES AND STANDARDS
The latest revision of the following specifications, codes and standardsare included as a portion of this specification， Detail requirementslisted in this specification shall override anycontradicting portionsof the following specifications， codes and standards.
MIL-W-27664 – Inert Gas Shielded Arc Spot Welding
The Joint Industrial Council (JIC) Electrical Standardsfor General Purpose Machine Tools，EGP，1，1967.
National Electrical Code (NEC)
Federal, state and local regulations pertaining toradio interference.
National Aerospace Standard 972，Glossary of Manu-facturing Equipment Terms .
American Welding Society’s Standard A3.0-69.
State and local safety and electrical codes.
Occupational Safety & Health Standard Part 19l0 ofChapter XVII of Title 29 of the Code of FederalRegulations(Occupational Safety & Health Act [OSHA] -1970.
National Aerospace Standard (NAS) 938，Machine Axis andMotion Nomenclature.
National Aerospace Standard (NAS) 955，InterchangeableTape Standards – Variable Block Format，NumericallyControlled Equipment.
National Aerospace Standard (NAS) 953，Numerical ControlSystem (Reference Only).
AIA/NAS 981-2012 pdf download
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