1 / 14

Parametric Sketching

Parametric Sketching. Motivation. Solid primitives not typically supported in parametric modelers  must create a 2D profile, then sweep. Feature Creation Procedure. Choose sketch plane, either a: Default work plane Planar face of existing feature Work plane Rough sketch

Michelle
Download Presentation

Parametric Sketching

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Parametric Sketching

  2. Motivation Solid primitives not typically supported in parametric modelers  must create a 2D profile, then sweep

  3. Feature Creation Procedure • Choose sketch plane, either a: • Default work plane • Planar face of existing feature • Work plane • Rough sketch • Some geometric constraints applied • Add/delete geometric constraints • Parametric dimensioning • Feature creation • Repeat 1 - 5

  4. Construction Geometry • Geometry created as part of the parametric modeling process that does not represent actual part geometry. Includes: • Work planes • Work axes • Work points • Construction geometry appears in feature tree

  5. Default Construction Geometry: Inventor • Work planes – mutually perpendicular • YZ • XZ • XY • Work Axes • X (red) • Y (green) • Z (blue) • Work Point • Origin of WCS

  6. Rough Sketch • Parametric sketching imitates actual sketching process  rough, approximate

  7. Sketch Plane Views View normal to sketch plane Isometric View

  8. Geometric Constraints • Typical constraints include: vertical, horizontal, collinear, concentric, tangent, etc. • Inventor constraints

  9. Display Geometric Constraints • Software includes option to show constraints

  10. Add/Delete Constraints • User can manually (explicitly) add constraints concentric tangent equal

  11. Parametric Dimensions • Add parametric dimensions to fully constrain profile • Each parametric dimension has two components: • Numerical value • Name Fully Constrained Sketch

  12. Parametric Dimensions - 2 • Default parameter names (e.g., d0) can be changed • Equations can be used to generate parameter value

  13. Under and Over-constrained Sketches Under-constrained Angle not necessary Vertical position of hole not specified Over-constrained

  14. Parametric Sketching

More Related