A special specimen was designed for the purpose of accuracy assessment, and investigated not only with respect to the dimension tolerances but also regarding the possibility to assemble/disassemble specific geometric interferences.
A slit designed with very tight dimension tolerances was manufactured to perform pressure drop measurements in fully developed laminar flows, viewing the isolation of the effects of the walls roughness from those of the entrance developing flow and from uncertainties in the channel height.
To finalize the design of this double wall component, the main emphasis is now to define the cooling channels geometry and to identify the optimum manufacturing route to assure adequate flow of coolant and sufficient mechanical strength in compliance with required dimension tolerances and quality of the welds.
With the advent of rapid fabrication processes such as additive manufacturing, abrasive waterjet machining, and laser cutting etc., parts fabricated from these processes can be designed with special elastic features that "average out" the uncertainty in dimension tolerances and manufacturing errors as a collective system at very low cost.
Based on the DSM-IV criteria and the observation of clinical case, Chen designed the Chinese Internet Addiction Scale containing 26 items in four dimensions: tolerance, withdrawal, compulsive behavior and other related factors [9].
When dealing with MEMS, because of their small dimensions, tolerances on shapes are relatively high.
Process planning accepts the design information of mechanical part such as dimensions, tolerances, geometry etc. and converts it into orderly manufacturing steps.
This chapter provides information on the way to specify manufacturing requirements in an engineering drawing according to International Standards Organization (ISO) standards and discusses issues such as sizes, shapes, dimensions, tolerances, surface finishes, and assembly specifications.
Usually, the integration of these levels is only carried out at the geometry level, without a complete integration of the dimension and tolerance levels.
This paper presents a product remanufacturability assessment model consisting of a set of numerical metrics, namely, disassembly accessibility, product complexity, disassemblability, and recoverability, based on the design features and information available in CAD models, e.g., bill of material, mating features, dimension and tolerance features, tools and accessories, etc.
