Nosecone (page 2) | Onshape CAD Tutorial | Stage One Education

Build the nosecone bridge

in which we constrain our sketches

8. Look at the bottom of your extrude

Hold the right mouse button to look at the bottom of the rocket
Zoom in using the mouse wheel to move the camera close to the bottom face

9. Start a sketch for the string bridge on your tube

Select the sketch tool
Click the bottom face of your tube to start sketching on that face

Right click and select View normal to sketch plane to line up your view

10. Start to draw the string bridge

Select the Use (Project/Convert) tool
Click on the inner circle

That line will bold, as it becomes part of your sketch

11. Draw the bridge

Select the Line tool

Click on the left side of the inner circle
Click on the right side of the inner circle
Right click and select escape line

Repeat to draw a second line below the first

12. Dimension the bridge

Select the dimension tool
Click the first line, then the second
Set the dimension to 0.1
Select the Equal tool
Click on each line to make their lengths' equal
Did you notice how the lines turned black? »

Black lines mean, “fully defined,” which means that you have told Onshape exactly where the line is.
If a line is blue, it means that there are still things to be constrained or dimensioned.

13. Finish the sketch

Select the "Trim" tool
Select the part of the circle outside the lines

On the top
On the bottom

Click the green check to finish the sketch

14. Extrude the bridge

Select the extrude tool
Click on "Sketch 2"
Click on Add to add to your part instead of creating a new part
Set the Depth to 0.25 in
Click the "Opposite direction" button to make the bridge go inside your tube
Click the green check

15. Strengthen the bridge with fillets

What is a fillet? »

Fillet: “a rounding of an interior or exterior corner of a part design.”

Select the "fillet" tool
Set the radius to 0.05
Click the 4 edges of your bridge
Click the green check