Functional tolerancing and testing increase microassembly yield

Gfeller, J.; Koelemeijer, Sandra; Bourgeois, F.; Richard, Roger Bruno; Jacot, Jacques

doi:10.1109/isam.2007.4288484

Cited by 1 publication

(1 citation statement)

References 9 publications

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“…Furthermore, the functional interference leading to an acceptable range of assembly forces has to be investigated in more detail. The commonly admitted interval range may be enlarged for several ball-bearings, and the effects as well on the yield as on production control are to be analysed [15,16,17,18].…”

Section: Further Workmentioning

confidence: 99%

When Manufacturing Capability Exceeds Control Capability: The Paradox of High Precision Products, or is it Possible to Assemble Functional Products out of Components we are Unable to Measure?

Chollet

Braun

Bourgeois

et al.

Micro-Assembly Technologies and Applications

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Sorting and mating is a very common practice in high precision manufacturing, as well in the watch industry, biomedical or automotive industry. This strategy helps to increase the assembly yield, but is costly and timeconsuming. The question is, when is it necessary to apply sorting and mating, and when can it by avoided without loss in product quality? We furthermore show in this paper that the measurement precision is often lower than that of manufacturing. New and more precise manufacturing equipment and assembly devices allow for narrower distributions, and this raises many questions: is it possible to stop sorting? how can we be sure of the quality of the components and of the products? A case study at the company MPS AG, manufacturer of miniature ball bearings, illustrates this trend. We propose another manufacturing and assembly strategies, and show what the conditions are that are necessary to permit this approach.

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Section: Further Workmentioning

confidence: 99%