Introduction to

Part 3

Outline of class1st part: How to make sketches

Entities Relations Dimensioning

2nd part: How to make features Starting/ending points Different kind of features

3rd part: practice

Things that can be sketched

Line Rectangle Slot Circle Arc Polygon Spline Ellipse Chamfer/Fillet

Offset Trim

Line

Click on the line symbol

Line OptionsAs sketchedHorizontal

Line will snap to be horizontalVertical

Line will snap to be verticalAngle

Will define the line based on an angleFor Construction

Will be used as a hidden lineInfinite Length

Line is infinitely long

Rectangle

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

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Slot

Circle

Arc

Polygon

Spline

Start clicking

Edit Spline

Adjust arrows Change slope of tangent

Add points (open spline tools) Chose ‘insert spline point’

Ellipse

1. Define center2. Define major axis3. Define minor axis

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Chamfer

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Fillet

Offset

Creates a copy of selected sketch entities a certain distance away

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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

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Sketch Relations

Relations add geometric constrains to the sketch entities Relations appear in green boxes by the entities they relate to

Horizontal relation

Horizontal/Vertical Parallel Perpendicular Collinear Coincident

Midpoint Intersection Tangent Coradial Concentric

Equal Pierce

Geometric Relations Tangent

Tangent

Parallel

HorizontalVertical

Intersection

Concentric Perpendicular

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.

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

How to constrain

Click ‘Add Relation’ Select entities Make the relation

The Status of a sketch

Under defined

Fully defined

Over defined

Creating Basic FeaturesExtrude Boss/Base FeatureExtruded Cut FeatureRevolve Boss/Base FeatureRevolved Cut FeatureFillet, ChamferDome Feature

Extrude Boss/Base Feature

Where to start the extrusion

Where to end the extrusion

Can extrude in a second direction

Can extrude from a thin feature or a contour

Add a draft to the part

Can choose the angle of extrusion

FromSketch Plane

The plane of the sketchSurface/Face/Plane

Can choose any faceVertex

Can choose a point for reference to startOffset

Can enter a quantity to offset from surface

Direction 1/Direction 2Blind

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

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

Contours Vs. Thin Features

2 Contours

3 Contours

Thin Feature

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Thin Feature One direction Midplane Two-direction

Sets the thickness of the extruded feature

Extruded Cut

All options are similar to extruded boss/base

Revolve Boss/Base Feature

Axis of revolution

Where to end the extrusion

Can revolve from a thin feature or a contour

Revolved Cut Feature

Fillet

Fillet Types Constant Radius

Entire fillet has a constant radius Variable Radius

Radius varies Face fillet Full round fillet

Rounds off bosses or ribs

Chamfer

Dome

Practice

Practice

Additional Stuff

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

Sweeping In order to sweep, you need two things Sketch profile Path sketch

The path must start in/on the sketch profile.

Lofting Lofting is when you have multiple cross sections, and the part

extrapolates the extrude from cross section to cross section

Lofting Need to make multiple sketches of multiple cross sections

Additional Stuff Mirror Patterns Shell