Assembly design
From PLMpedia
Creating an electronic geometric model of a product comprising separate 3D parts (units). There are two approaches to assembly design – downward and upward. The downward approach means design from scratch. When a new part must be added to a device, the modules for part design is called, and the dimensions of the engineerable part must be adjusted to the divisions of already created parts of the device. Under the upward approach, the device is assembled from previously designed parts, that are positioned with respect to each other by means of assembly constrictions (coaxiality, incidence, etc.) Upward assembly design is possible only as variational design. An important function of the assembly design module is calculating freedom degrees of the parts of a device and their dynamic transition in accordance with the imposed constraints. It allows evaluating kinematics of the future product at the design stage. The libraries of standard details (fixing systems, pipes, gears, bearings) allow using ready elements for designing the device. An important feature of the assembly design module is its productive capacity associated with large-scale assemblies (requiring tens of thousands parts).
