Creating Advanced Drafts: About Parting Line Adjustment

You can create an advanced draft using the Parting Line Adjustment option. In this case, machining techniques can be applied onto the part at later stage.

Before you begin: To illustrate that option, let's consider the 3D shape we used in the previous scenario.
Related Topics
Creating Advanced Drafts
About Creating Draft Features
More about Basic Drafts
More about Advanced Drafts

  1. Set the Fitted option in the Draft Definition (Advanced) dialog box.

    This option lets you perform a draft operation on two opposite sides of the part while adjusting the resulting faces on the parting element you chose.



  2. Keep 0.1mm as the parting line adjustment value, and enter 17 degrees to change the draft angle value you previously set to the draft.

    This excessive value does not reflect angle values designers usually use, but this lets us quickly see what happens next. You obtain a draft which is not satisfactory. As indicated by the arrow, the curvature radius would invalid any machining process because it is too small:



  3. If you click Top View from the View toolbar, the curvature radius causing trouble for being too small, becomes more visible, as pointed to by the arrow:



  4. Now, changing the parting line adjustment value to 0.7 mm would add material up to the curve pointed to by the arrow. Consequently, the curvature radius would be more acceptable.



  5. Changing the parting line adjustment value to 0.9mm would let you obtain an even larger curvature radius:





    Concretely speaking, when setting the parting line adjustment parameter, you define a length value that sets a maximum thickness to be added to the draft to enlarge the wrong curvature radius. As illustrated in the case just above, that length is represented by L. The chosen value is 0.9mm, which means that L might be 0.9mm or even a little bit less. Considering the rest of the curvatures of the draft feature, depending on the part shape, that thickness will most often be thinner, but will never exceed the value you entered.