Pro/ENGINEER: Mechanism Design

Wildfire 4.0

Student Guide Revision 1.0

February 2010

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ASCENT - Center for Technical Knowledge® Pro/ENGINEER: Mechanism Design

Wildfire 4.0 Revision 1.0

Prepared and produced by:

ASCENT Center for Technical Knowledge 1001 E. Market Street, Suite 102 Charlottesville, VA 22902 866-527-2368 www.ascented.com

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© ASCENT - Center for Technical Knowledge, 2010

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Table of Contents

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Table of Contents

Chapter 1 Capabilities of MDX .................................................... 1-11.1 Mechanism Introduction............................................... 1-31.2 Mechanism Components.............................................. 1-4

Connections .................................................................... 1-4Joint Axis Settings........................................................... 1-4Servo Motors................................................................... 1-4Analysis Definition........................................................... 1-4

1.3 Design Approach .......................................................... 1-51.4 Mechanism Design & Subassemblies......................... 1-61.5 Mechanism Interface..................................................... 1-7

Chapter 2 Creating Assemblies .................................................. 2-12.1 Types of Connections................................................... 2-3

Rigid Connection............................................................. 2-4Pin Connection................................................................ 2-4Slider Connection............................................................ 2-5Cylinder Connection........................................................ 2-5Planar Connection........................................................... 2-6Ball Connection ............................................................... 2-6Weld Connection............................................................. 2-7Bearing Connection......................................................... 2-8General Connection ........................................................ 2-86DOF Connection ........................................................... 2-9

2.2 Assembling a Component with Connections........... 2-10Constraint Conversion................................................... 2-11

2.3 Degrees of Freedom ................................................... 2-12Exercise 2a Creating Connections..................................... 2-13Exercise 2b Three-Bar Linkage .......................................... 2-22Exercise 2c Project - Engine............................................... 2-27Exercise 2d Project - Hydraulic Boom ............................... 2-35

Chapter 3 Simulating Motion....................................................... 3-13.1 Dynamic Drag ................................................................ 3-33.2 Saved Views .................................................................. 3-53.3 Control the Drag Function............................................ 3-63.4 Joint Axis Settings........................................................ 3-8

Defining the References.................................................. 3-9

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Setting a Regeneration Value ....................................... 3-10Setting the Minimum and Maximum Limits ................... 3-11Dynamic Properties....................................................... 3-12

Exercise 3a Joint Axis Settings.......................................... 3-14Exercise 3b Snapshots ....................................................... 3-24Exercise 3c Project - Engine Assembly............................. 3-26Exercise 3d Project - Hydraulic Boom Assembly............. 3-31

Chapter 4 Advanced Connections.............................................. 4-14.1 Slot-Follower Connection ............................................ 4-3

Creating a Slot-Follower Connection .............................. 4-4

4.2 Cam-Follower Connection ........................................... 4-7Creating a Cam-Follower Connection............................. 4-8

4.3 Gear Connections....................................................... 4-11Standard Gear Connection ........................................... 4-12Rack & Pinion Connection ............................................ 4-14

Exercise 4a Display Slot-Follower Motion......................... 4-16Exercise 4b Create a Cam Assembly................................. 4-21Exercise 4c Create a Gear Pair Connection...................... 4-27

Chapter 5 Servo Motors and Analyses ...................................... 5-15.1 Servo Motors ................................................................. 5-35.2 Analysis Definition........................................................ 5-9Exercise 5a Applying Servo Motors I................................. 5-13Exercise 5b Applying Servo Motors II ............................... 5-19Exercise 5c Applying Servo Motors III............................... 5-23

Chapter 6 Playback Results ........................................................ 6-16.1 Playback ........................................................................ 6-36.2 Movie and Image Files.................................................. 6-56.3 Checking for Interference ............................................ 6-66.4 Motion Envelope Creation............................................ 6-86.5 Analyzing Measures ................................................... 6-106.6 Trace Curves ............................................................... 6-136.7 Cam Synthesis Curves ............................................... 6-15Exercise 6a Use Playback and Create Trace Curves ....... 6-16Exercise 6b Create Movie and Image Files ....................... 6-20

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Exercise 6c Analyze Measures and Motion Envelopes.... 6-22

Chapter 7 Design Animation ....................................................... 7-17.1 DAO Interface ................................................................ 7-37.2 Design Approach .......................................................... 7-57.3 Creating an Animation.................................................. 7-6

Body Definitions .............................................................. 7-6Drag and Snapshots ....................................................... 7-7Key Frame Sequence ..................................................... 7-8

7.4 Servo Motors ............................................................... 7-107.5 Lock Bodies................................................................. 7-117.6 Visibilities .................................................................... 7-12

View @ Time................................................................. 7-12Transparency @ Time................................................... 7-13Display @ Time............................................................. 7-14

7.7 Animation Timeline ..................................................... 7-157.8 Finishing the Animation ............................................. 7-16Exercise 7a Create an Animation ....................................... 7-17Exercise 7b Apply Servo Motors ........................................ 7-26Exercise 7c Specify Component Displays & Views.......... 7-28Exercise 7d Create an Animation Sequence ..................... 7-36

Appendix A Additional Exercise ................................................ A-1A.1 Drivers Project.............................................................. A-3

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