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Description / Abstract:
Application
This procedure defines the clinching acceptance test for clinch
schedule development for aluminum and low carbon steel sheet. All
such sheet material must pass minimum performance testing. Consult
the appropriate Engineering Material Specification for material
exceptions. Testing confirms that the correct punch and die
combination were used to satisfactorily join given gauges of sheet
metal together. Cross sections of the clinch joint must be
evaluated to ensure a robust joint. After the correct tooling has
been identified, lap shear and coach peel samples are fabricated.
Initial testing requires a sample size of 30 each for the strength
tests. Samples are pulled on a tensile test machine.