How to create a helmet in SIemens NX

The following tutorial shows how to create a helmet in SIemens NX, using the basic commands of the software. You can follow the tutorial to create it.
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Step 1:

First, create the following sketch on the YZ datum plane, here we will use two spline curves for this. And label the detailed dimensional constraints.

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Step 2:

Next, we create the following curve on the XZ datum plane with the detailed dimensional constraints as follows:

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Step 3:

Switch to the Curve toolbar and use the Spline Curve command to create the curve shown below.

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Step4:

Create a new sketch, in the XY datum plane, here to create a spline curve before, first use the “Intersection Point” command to create the following Figure 1 in the four datum and the curve of the intersection point. Then according to these 4 intersection points, create the spline curve.

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Step 5:

Create a new datum plane, select the XY datum plane with an offset of 30mm. to get the new datum plane.

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Step 6:

Create a new sketch on the datum plane created above, create the sketch in the same way as step 4, is the same method.

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Step 7:

Continue to create a datum plane, select the XY datum plane, offset 130mm, to get a new datum plane; and create a new sketch on this new datum plane, as shown below;

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Step 8:

Use the Mesh Surface command to create a surface as shown below.

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Step 9:

Use the Fill Surface command to create the surface shown in the following figure to complete the overall surface.

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Step 10:

Create a sketch of the following dimensions in the XZ datum plane and use this sketch to pull out a new surface that will be used later as a clipping surface;

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Step 11:

Use the surface trimming command to trim off the lower portion of the main surface to get the effect shown below;

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Step 12:

Create a new datum plane, using curves and points, as shown below;

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Step 13:

On the datum plane created above, create the following sketch and use the Stretch command to cut out the material, the effect is shown in Figure 3 below:

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Step 14:

Continue to create a new datum plane based on the curve and point approach and on this datum plane create a sketch with the following dimensions;

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Step 15:

Using the pass through curve command, create the following surface;

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Step 16:

Finally, we stitch all the surfaces together and add a thickness of 2mm to the surface treatment:

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