Automatic Narrow-Deep Feature Recognition for Mould Manufacturing

There usually exist narrow-long-deep areas in mould needed to be machined in special machining.To identify the narrow-deep areas automatically,an automatic narrow-deep feature (NF) recognition method is put forward accordingly.First,the narrow-deep feature is defined innovatively in this field and then feature hint is extracted from the mould by the characteristics of narrow-deep feature.Second,the elementary constituent faces (ECF) of a feature are found on the basis of the feature hint.By means of extending and clipping the ECF,the feature faces are obtained incrementally by geometric reasoning.As a result,basic narrow-deep features (BNF) related are combined heuristically.The proposed NF recognition method provides an intelligent connection between CAD and CAPP for machining narrow-deep areas in mould.