Neural network approach for datum selection in CAPP

Jiannan Mei, Hong C. Zhang, William J.B. Oldham

Research output: Contribution to conferencePaperpeer-review


Process planning is to convert design specifications into manufacturing instructions to make products precisely and economically. Therefore, the tolerance information from design and manufacturing processes must be carefully studied for a computer aided process planning system (CAPP) to generate a feasible and economical process plan. Tight tolerances are usually specified in design when higher accuracy of a feature (such as flatness, roundness, etc.) or a relationship (such as parallelism, perpendicularity, etc.) is required. For such relationships concerning more than one feature, especially for those geometric tolerances with specified datum(s), selection of datum of manufacturing in process planning plays a very important role to make parts within the specifications at the lowest cost. This paper presents a neural network approach for CAPP to select datums for rotational parts based on the shape of the parts and tolerance constraints. Back-propagation algorithm is used and some experiments are conducted. The results are analyzed and further research is proposed.

Original languageEnglish
Number of pages8
StatePublished - 1994
EventProceedings of the 1994 International Mechanical Engineering Congress and Exposition - Chicago, IL, USA
Duration: Nov 6 1994Nov 11 1994


ConferenceProceedings of the 1994 International Mechanical Engineering Congress and Exposition
CityChicago, IL, USA


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