measurement: Tolerances and Inspection Go Hand-in-Hand
Optical gages that measure parts also scan the conical seat, including roundness, straightness, roughness and more.
Tight tolerances and rapid form-and-surface inspection might not have gotten along very well in the past. But they certainly seem to be going hand-in-hand much more often these days-if developments in fuel-injector manufacturing are any indication. Suppliers to the automobile industry are using laser and white light interferometers to measure mating surfaces inside the injectors so they can guarantee that the metal-to-metal seals will withstand pressures greater than 30,000 psi.