MIL-DTL-45210B(MR)
4.
VERIFICATION
4.1
Certification of welding equipment and recorded welding procedures. Prior
to welding the first production assembly of each specific design, the contractor
or the manufacturer, or both shall weld and test the welds in one assembly or
specimen under Government surveillance. The assembly or specimen shall be
welded in accordance with the recorded welding procedure. This certification
test shall be carried out on each welding machine that will be used for the
production of weldments for each specific design.
4.1.1 Certification testing. The specific welding unit used must demonstrate
that it has the electrical and mechanical capacity for producing the weldment
that is being tested. Any new design and/or material used in a part must be
tested to ensure that the welding unit demonstrates an acceptable electrical and
mechanical capacity for producing the new weldment. These tests shall be
carried out on all welding machines used for production of weldments on each new
design/material.
4.2 Welding specimens. When a specimen is used, the material thickness,
composition range, weld edge distance, spot spacing, and the general weld area
contour and metal fit shall be the same as the production part. When the
application of weld primer or sealer is required by the recorded welding
procedure for production assemblies, the specimens shall have these materials
applied before welding in the same manner as applied to the production parts.
When a substantial amount of magnetic material such as the assembly fixtures,
locators, etc., are inserted in the throat of the welding machine during the
welding of a production part, this condition shall be closely duplicated for the
specimen.
4.3 Visual examination of welded assembly or specimen. All welds shall be
subject to visual examination. The outer surface of all welds shall be smooth
and free of cracks, tip pickup, pits, metal expulsion, and other defects which
indicate that the welds were made with contaminated electrodes, or with
improperly prepared surfaces.
4.4 Tolerances. Tolerances on spot weld spacing and edge distance shall be in
accordance with applicable drawings.
4.5 Peel testing. The welded assembly or specimen shall be subjected to the
peel test. The peel test shall be conducted by separating the welded components
by driving a chisel between them in an unwelded area or by peeling one sheet
back against the weld until failure occurs around the periphery of the weld or
until the part fails. Failure of the base metal outside the weld area shall be
considered evidence that the welds are satisfactory. The minimum average button
diameter as measured in two perpendicular directions at the faying surface shall
conform to table III.
4
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business