Siemens NX Tutorial: Top-Down Design using ‘Create New’ Feature

By | 07/26/2016

    Today we will speak about the Create New command which located under the Assemblies tab. This command creates a new part file for the selected geometry. It considers a part of co-called ‘Top-Down Design Methodology’. Using this feature allows you to:

  • Copy an existing geometry to a new part file;
  • Create an empty part file;

    It is possible to use the next objects as a geometry for a new part:

  • Curves, points, splines
  • Sketches
  • Solid and Sheet bodies
  • Datum Coordinate System
  • Drafting objects: dimensions, notes, crosshatch
  • Datum Axis and Datum Planes
  • Feature Groups


  • If copying a sketch, a link to the related face would be broken
  • All the expressions used in a sketch would be copied to a new part. The expressions  that aren’t connected to the sketch won’t be copied. All the dimension, related to a sketch, would be copied.
  • A drafting object would be copied to a new part only if all related objects are copying. The only exception is a crosshatch, which is copying together with it associative boundary.
  •  An ordinate dimensions won’t be copied.

     I downloaded the STEP214 file with the industrial robot solid model. It consists of several solid bodies. I would create an assembly using these solids, therefore it is needed to save each solid as a new part.

Create New

Industrial Robot

     Go to Assemblies tab and click on the Create New button.

'Create New' Button

‘Create New’ Button

    Insert a valid name for a new part and click Ok. Now let’s slow down and discover the options, provided by appeared Create New Component window:

NX Create New Component Window

NX Create New Component Window

  • Add Defining Objects – defines whether the defining objects will be copied to a new part or not;
  • Delete Original Objects – defines whether original objects will be deleted or not;

    Click OK and proceed to the Assembly Navigator. As it shown on the picture, the selected geometry was copied to a new component, which also was added to the assembly structure:

New Component Geometry

New Component Geometry

    Repeat the previous steps to gain a result: all solids were copied to the new assembly components:

Create New Completed

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