Fabrication Controls
We maintain accuracy for sawing, shearing, and cutting to ± .010"
and surface finish to within 100 rms. Brake press bends are inspected
for angular/straightness accuracy. Necessary adjustments are made in dies
to maintain straightness to ±.010" and angularity to ±.1
degree. After cold forming, material is inspected for stress cracking.
Geometric and dimensional accuracy in punch-pressed holes is maintained
to ±.010" with necessary adjustments made in jigs and fixtures.
All roll-formed parts are inspected for contour (roundness), and adjustments
are made to keep dimensions within ±.010".
Welding Controls
Careful inspections determine the weldability of the material, the metal
filler, surface condition, and fit. Workpieces are inspected for proper
joints, and assemblies are measured for geometric/dimensional accuracy.
In addition, our welding machines are recalibrated monthly. Our experienced
technicians visually inspect all welds for incomplete fusion, underfill,
cracks, cavities, warping, and other irregularities. Nondestructive testing,
such as dye penetrant, ultrasound, and radiographic testing, is used as
required to search for hidden faults. We also conduct destructive tests
by taking coupons of the materials and welds for metallurgic microanalysis
or for testing to failure as a check on physical consistency.
Material Controls
We require all raw materials to be accompanied by certified analyses of
physicals and chemistry, and we double-check these analyses in our laboratory.
Bend testing and grain alignment are assessed on materials that require
cold forming. Weldability tests are performed on materials destined for
welding.
