Vehicle Body In White Dimensional Inspection Based On Functional Dimension

In the current automobile industry field in China, every company are importing newmodel as well as trying to raise build capacity and reduce cost. But most important ofthese is quality improvement. And fitting finish quality becomes more and moreimportant and being focused by all around because it represent the manufacturing processability of the company. So how to inspect body in white dimension so as to improvecomplete vehicle fitting finish performance shall be well studied. This is what this articlestudies.In the discourse, it will discuss a new kind of dimensional inspection method beingused in CMM measurement for normal massive production. This is called functionaldimension. It can show the complete vehicle fitting status better than the normal CMMmeasurement data. This discourse will focus on the below subject:1) Functional Dimension set up: Study the process of dimension spec building fromnew vehicle project to normal production to define the Functional Dimension and itstheory.2) Functional Dimension specification build: Study the dimensional chain theory inalternate way, combine with6sigma, and base on single point spec and full vehicletolerance to set up the spec tolerance and define the method how to set it.3) Functional Dimension application in practical area: Put in use of functionaldimension in real production. Collect measurement data and compare it with traditionaldata to show the better relativity of functional dimension. Also set up process incompany to use it as a realtime BIW inspection.During the write of this discourse, functional dimension inspection is put in use at thesame time. It helps plant to build BIW with a better way of inspection. And this waycan also use in a new model launch.