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Introduction to

Introduction to. Part 3. Outline of class. 1 st part: How to make sketches Entities Relations Dimensioning 2 nd part: How to make features Starting/ending points Different kind of features 3 rd part: practice. Things that can be sketched. Line Rectangle Slot Circle Arc Polygon

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Introduction to

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  1. Introduction to Part 3

  2. Outline of class • 1st part: How to make sketches • Entities • Relations • Dimensioning • 2nd part: How to make features • Starting/ending points • Different kind of features • 3rd part: practice

  3. Things that can be sketched • Line • Rectangle • Slot • Circle • Arc • Polygon • Spline • Ellipse • Chamfer/Fillet • Offset • Trim

  4. Line

  5. Click on the line symbol

  6. Line Options • As sketched • Horizontal • Line will snap to be horizontal • Vertical • Line will snap to be vertical • Angle • Will define the line based on an angle • For Construction • Will be used as a hidden line • Infinite Length • Line is infinitely long

  7. Rectangle

  8. Rectangle Options • Corner Rectangle • Assumes a horizontal rectangle • Center Rectangle • Assumes horizontal • 3 point corner rectangle • Chose 3 points for the corners • 3 point center rectangle • Chose two points for a center axis • Parallelogram • 3 points for a parallelogram

  9. Slot

  10. Circle

  11. Arc

  12. Polygon

  13. Spline Start clicking

  14. Edit Spline • Adjust arrows • Change slope of tangent • Add points (open spline tools) • Chose ‘insert spline point’

  15. Ellipse • Define center • Define major axis • Define minor axis

  16. Chamfer

  17. Fillet

  18. Offset • Creates a copy of selected sketch entities a certain distance away

  19. Trim • Power Trim • Trim all entities the mouse moves over • Corner • Connect two lines • Trim away inside • Cut lines passing through two entities • Trim away outside • Cut lines extending past two entities • Trim to closest • Cut the entity up to the next closest entity

  20. Sketch Relations • Relations add geometric constrains to the sketch entities • Relations appear in green boxes by the entities they relate to • Horizontal/Vertical • Parallel • Perpendicular • Collinear • Coincident • Midpoint • Intersection • Tangent • Coradial • Concentric • Equal • Pierce Horizontal relation

  21. Geometric Relations Horizontal Vertical • Tangent Intersection Parallel Tangent Concentric Perpendicular

  22. Geometric Relations (These can be added automatically via hotpoints) • Horizontal • Straight left to right • Vertical • Straight up and down • Parallel • Lines side by side and having the same distance continuously between them • Perpendicular • at an angle of 90° to a given line • Coincident • Coincident points will lie on a line/curve • Midpoint • Point will at the center of a line/curve • Intersection • Point where two lines/curves cross • Tangent • a line that touches a curve at a point, but if extended does not cross it at that point.

  23. Geometric Relations (These can only be added manually) • Coradial • Two arcs with the same center point and radius • Concentric • Two arcs/circles with the same center point • Equal • The driving dimension for the entities are equal • Length • Radius • Pierce • When there is a coincident reference to a different sketch • Symmetric • Add some symmetry about an axis/centerline

  24. How to constrain • Click ‘Add Relation’ • Select entities • Make the relation

  25. The Status of a sketch • Under defined • Fully defined • Over defined

  26. Creating Basic Features • Extrude Boss/Base Feature • Extruded Cut Feature • Revolve Boss/Base Feature • Revolved Cut Feature • Fillet, Chamfer • Dome Feature

  27. Extrude Boss/Base Feature

  28. Where to start the extrusion Can choose the angle of extrusion Where to end the extrusion Add a draft to the part Can extrude in a second direction Can extrude from a thin feature or a contour

  29. From • Sketch Plane • The plane of the sketch • Surface/Face/Plane • Can choose any face • Vertex • Can choose a point for reference to start • Offset • Can enter a quantity to offset from surface

  30. Direction 1/Direction 2 • Blind • Extrudes a specified distance • Through All • Goes through all bodies • Up To Next • Extrudes to the nearest feature • Up to Vertex • Up to a specified point • Up to Surface • Can choose a surface to extrude to • Offset from Surface • Can set a distance from a selected surface • Up to Body • Similar to surface, but can choose a whole object (body) • Midplane • Extrude in two directions with the current plane set as center

  31. Draft • You can use a draft to add an angle to the extrusion • Useful for injection molding

  32. Contours Vs. Thin Features • 2 Contours • 3 Contours • Thin Feature

  33. Thin Feature • One direction • Midplane • Two-direction • Sets the thickness of the extruded feature

  34. Extruded Cut • All options are similar to extruded boss/base

  35. Revolve Boss/Base Feature

  36. Axis of revolution Where to end the extrusion Can revolve from a thin feature or a contour

  37. Revolved Cut Feature

  38. Fillet

  39. Fillet Types • Constant Radius • Entire fillet has a constant radius • Variable Radius • Radius varies • Face fillet • Full round fillet • Rounds off bosses or ribs

  40. Chamfer

  41. Dome

  42. Practice

  43. Practice

  44. Additional Stuff

  45. Sweeping • Normal extrusion restricts your extrude to a linear path. • Sweeping is when you extrude along a path

  46. Sweeping • In order to sweep, you need two things • Sketch profile • Path sketch • The path must start in/on the sketch profile.

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