Engineering 1182 Constraint Based Modeling Geometric Constraints College

• Engineering 1182 Constraint Based Modeling Geometric Constraints College of Engineering Education Innovation Center Rev: 20121023, AJP Geometric Constraints 1

• Engineering 1182 Constraints Two different types of constraints: 1. Geometric • Constraining geometry based on normal orientations or relative to other parts of the geometry 2. Dimensional • Numerical values that constrain the size and location of geometry Rev: 20121023, AJP Geometric Constraints 2

• Geometric Constraints 2 Options Constraints relative to the normal conventions for direction. Examples: vertical, horizontal Rev: 20121023, AJP Engineering 1182 Constraints that are relative to other sketch entities. Examples: perpendicular, parallel Geometric Constraints 3

• Engineering 1182 Advanced Geometric Constraints • Accurate Models • Tangent Constraints • Arcs or Circles • Equality Constraints • Equal sizes • Concentric constraints • Align Center Points Rev: 20121023, AJP Geometric Constraints 4

• Automatic Constraints While sketching Solid. Works will automatically guess at the constraints that the user implies Rev: 20121023, AJP Engineering 1182 Unwanted constraints can be selected (left click) and deleted (delete key) Dotted lines show alignment and icons show the constraints Geometric Constraints 5

• Engineering 1182 Solid. Works: Selecting Lines or points can be selected by holding Ctrl and left clicking on each Rev: 20121023, AJP At the left of the screen relations can be added by selecting the appropriate icon Geometric Constraints The lines will snap to the applied constraint and icons will display the current constraints 6

• Engineering 1182 Solid. Works: Applying Constraints This edge can be selected and moved manually Original Shape Rev: 20121023, AJP Step 1: Horizontal and Vertical Constraints Geometric Constraints Step 2: Make Slants Parallel 7

• Engineering 1182 Solid. Works: Applying Constraints This profile is not fully constrained but the shape is generally constrained by using only Geometric Constraints Step 3: Equality Constraints on all similar members Rev: 20121023, AJP Geometric Constraints 8

• Engineering 1182 Geometric Constraints Wrap Up Relationships: • Vertical • Horizontal • Parallel • Perpendicular • Equal • Coincident Homework Assignment Draw the following object and constrain with geometric constraints only Circular Relationships: • Tangent • Concentric Rev: 20121023, AJP Geometric Constraints 9

• In-Class Assignment 1 8 2 Engineering 1182 List all the necessary constraints to go from the initial shape to the final, then apply the constraints on the Solid. Works part file to confirm 7 3 6 4 5 Rev: 20121023, AJP Geometric Constraints 10