3D modelling of complex assemblies and heavy structures


A heavy engineering manufacturer wanted to convert their drawings from 2D to 3D and to create assemblies of the 3D models. This work was challenging due to the complexity of the drawings and the relatively short time duration of time available for completing the project.

Technical approach

The inputs received from the client were in the form of pdf drawing of parts and assemblies.

These complex 2D drawings were studied and the conflicts in the assemblies and in the subassemblies of the parts were identified, reported to the client and resolved after discussions.

  • A skeleton design (conceptual design) was prepared in order to form an envelope. This envelope helps identify the length, width and height requirements of the final product which were shared with the customer for making an analysis for the positioning and the space requirements. Changes were made to the design as per the space available.
  • A custom frame was prepared in order to obtain the cutting length and cutting angle. This framework helped in reducing material wastage and utilization of frame, enabled us to do corner treatment which in turn reduced the time if any changes are required, and at the same time increased flexibility of work.
  • A linking mechanism was created so that any changes made to the design would automatically be incorporated in the final assembly.
  • Tests were carried out to detect any collision amongst different parts and modifications were made accordingly.


  • Total of 7 assemblies, 14 subassemblies and 3200 parts were modelled.
  • A simplified BOM was generated by using a proper parent-child relationship. This deep and accurate BOM smoothed the new product introduction process and gave more control to ramp up to full production.
  • The linking mechanism was also connected to the BOM which in turn was linked to the cost. So any change made in the assembly would automatically change the BOM and thus change the final cost.