Our client created a concept CAD model for a dispenser drawer storage system that would provide storage for tea and coffee sachets. The concept design was modular and could cater for different sachet volume quantities in a 9 drawer or 12 drawing configuration. It could also expand to join several assemblies together making the volume even bigger.
With the concept complete they now required the concept to proceed to the manufacturing stage. This required the production of separate CAD models along manufacturing drawings of each individual component that made up the assembly for their overseas manufacturer to start pre-production of the concept within a short “10 day” timeframe.
As with any reverse CAD engineering project there are a number of challenges the first one is to understand the feature tree in order to decide the method of separating the model i.e. start from scratch and re-model the components or separate the bodies re-assigning the references.
In addition there were a number of other considerations due to how the part had been modelled, such as:
– Top down modelling for the concept design
– 400+ features within design tree
– Associated reference planes
– Configurations of the part
– Mirrored features
Following a consultation with the client, it was agreed that it would be more beneficial to spend some time understanding the references of each individual component and reposition the features in the feature tree.
The first step was to delete the unwanted features by using save as copy and create a new part. Using this method as well as retaining the main reference plane meant the individual parts could be separated and brought back into the assembly in the same orientation as it was originally modelled.
The next step was to re-create mirrored features and generate new planes that were not cited in the original model. Due to several moving features within the feature tree it was important to comprehend the references. This included consistent examination of the Parent and Child relationships to arrange the features in order and separate from the other components.
Re-creating sketch planes and surfaces separated the sketch geometry this enabled the surface geometry to be modified before modifying a number of surface features including:
– Offset surfaces
– Planar surfaces
– Revolved surfaces