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3DCS Mechanical Modeler Tolerance Analysis - Kinematic and Functional Motion

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Apply Joints and Constraints and Analyze Through the Full Range of Motion

Not all parts and assemblies are static. Many move, react and change during their operation, whether a robotic arm, the shocks of an automobile, the landing gear of a plane or the pistons in an engine. Variation can affect these kinds of assemblies throughout their operation.

Using a new set of kinematic Joints and Constraints and unique simulation, 3DCS Mechanical Modeler can determine the impact of variation on your assembly through its entire range of motion.

With built-in tools like the Degree of Freedom counter, 3DCS Mechanical Modeler allows users to tackle a whole new breadth of models and applications.

3DCS Mechanical Modeler is an add-on module for 3DCS software solutions, available in all versions, and adding a new toolbar containing Joints and Constraints, Mechanical Moves, Deviation in Motion and the Degree of Freedom counter.

Learn More About the Improvements to 3DCS Mechanical - http://www.3dcs.com/tolerance-analysis-software-and-spc-systems/add-ons/mechanical-modeler

Publié dans : Ingénierie
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3DCS Mechanical Modeler Tolerance Analysis - Kinematic and Functional Motion

  1. 1. Dimensional Control Systems | 2017 All Rights Reserved 3DCS Mechanical Modeler Add-on Add kinematic and mechanical functions to your 3DCS software
  2. 2. Dimensional Control Systems | 2017 All Rights Reserved Available in All 3DCS Platforms 3DCS Mechanical Modeler is an Add-on module available for all versions of 3DCS, including all integrated versions and the stand alone version (multi-CAD)
  3. 3. Dimensional Control Systems | 2017 All Rights Reserved Benefits of Mechanical Modeler • Speed up and simplify modeling of kinematic assemblies • Model complicated linkages and mechanical assemblies • Combine 3D Variation and Kinematic Analysis • Depict variation on kinematic assemblies through their range of motion in place of fixed locations. Check clearances throughout a range of motion. Analyze piston heads after thermal expansion and manufacturing variation have been added to see if they will always fit as built.
  4. 4. Dimensional Control Systems | 2017 All Rights Reserved Value of Mechanical Modeler Understand how variation affects moving parts on your product Reduce scrap from kinematic components by optimizing assembly processes and part tolerances Save time by modeling faster with Mechanical Moves
  5. 5. Dimensional Control Systems | 2017 All Rights Reserved What is Mechanical Modeler 3DCS Mechanical Modeler is an Add-on to any 3DCS Variation Analyst Software. 3DCS Mechanical Modeler adds an additional toolbar of Joints, Constraints, Mechanical Moves and the ability to deviate through a range of motion. • An easy-to-use dimensional analysis solution for mechanical and kinematic assemblies • 3DCS Mechanical Modeler has a new simplified kinematic “Move” interface • Joints & Constraint library supports non-3- 2-1-type moves
  6. 6. Dimensional Control Systems | 2017 All Rights Reserved Reasons to User Mechanical Modeler • 3DCS Variation Analyst supports accurate Mechanical Variation Analysis but: – It takes too long to create models – It’s too difficult to model – Requires Expert Modelers – Too much capability • Mechanical Modeler Objectives – Cut Modeling time by 50% – More Intuitive Modeling – Analyze Range of Motion
  7. 7. Dimensional Control Systems | 2017 All Rights Reserved HOW DOES MECHANICAL MODELER WORK What kinds of Joints and Constraints are in Mechanical Modeler
  8. 8. Dimensional Control Systems | 2017 All Rights Reserved How Does Mechanical Modeler Work? • Joints and Constraints replace 3DCS moves – E.g 3 bar link = 3 revolute joints. • Over-constrained systems supported • Under-constrained systems supported • Kinematic Range of Motion Animation and Analysis • Support for multiple sub-assemblies. • All other 3DCS capabilities supported – Tolerances, Measures, Analysis, Reporting – Assemblies can be static or can move through a range of motion
  9. 9. Dimensional Control Systems | 2017 All Rights Reserved Supported Joints and Constraints Joints and Constraints • Revolute • Prismatic • Cylindrical • Spherical • Planar • Coincidence • Contact • Offset • Angle • Fixed • Fixed Together
  10. 10. Dimensional Control Systems | 2017 All Rights Reserved Supported Constraints Coincidence Sphere Hole/Pin/ Edge Planar Surface Slot/Tab Sphere Yes Yes Yes Yes Hole/Pin/ Edge Yes Yes Yes Yes Planar Surface Yes Yes Yes Yes Slot/Tab Yes Yes Yes Yes Contact Sphere Hole/Pin/ Edge Planar Surface Sphere Yes Yes Yes Hole/Pin/ Edge Yes Yes Yes Planar Surface Yes Yes Yes Offset Sphere Hole/Pin/ Edge Planar Surface Slot/Tab Sphere Yes Yes Yes Yes Hole/Pin/ Edge Yes Yes Yes Yes Planar Surface Yes Yes Yes Yes Slot/Tab Yes Yes Yes Yes Angle Sphere Hole/Pin/ Edge Planar Surface Slot/Tab Sphere N/A N/A N/A N/A Hole/Pin/ Edge N/A Yes Yes Yes Planar Surface N/A Yes Yes Yes Slot/Tab N/A Yes Yes Yes
  11. 11. Dimensional Control Systems | 2017 All Rights Reserved Supported Joints
  12. 12. Dimensional Control Systems | 2017 All Rights Reserved DEGREE OF FREEDOM COUNTER Helpful tools for validating your Mechanical Models
  13. 13. Dimensional Control Systems | 2017 All Rights Reserved Degree of Freedom Counter Validation tool in Mechanical Modeler for checking a parts Degrees of Freedom, whether it is properly constrained Method of checking Mechanical Moves to validate their set up
  14. 14. Dimensional Control Systems | 2017 All Rights Reserved Use to Check Shared Models Validate the move of shared models Make sure models created by colleagues are set up correctly before continuing your work Failed Move
  15. 15. Dimensional Control Systems | 2017 All Rights Reserved Use to Validate as You Model 1. Check each of your moves as you make them. 2. Compare before and after changes to your model to verify that your moves are properly constrained
  16. 16. Dimensional Control Systems | 2017 All Rights Reserved BEST PRACTICES Tips to using and modeling with Mechanical Modeler
  17. 17. Dimensional Control Systems | 2017 All Rights Reserved Mechanical Move Order ● Order the motion after the moving joint ● Joints or Constraints o Parts that will have motion use Joints o Parts that will not have motion use Constraints ● Use actual functional indexing features
  18. 18. Dimensional Control Systems | 2017 All Rights Reserved Best Practices Mechanical Moves need to match the locators, not the assembly process or the part tree. Select the moves type based on how the parts are attached. Consider the number of Degrees of Freedom restrained by the attachment. Group together moves for the same part in the move list(s) for ease of modeling. Be consistent and logical when selecting object and target features and parts for ease of modeling.
  19. 19. Dimensional Control Systems | 2017 All Rights Reserved Best Practices Mechanical Moves • The Mechanical moves only allow either one or two features to be selected in each feature list. The object and target lists do not need to contain the same number of features. • The Move Parts tab from most Mech moves only allows two parts to be added: the first should contain the object features and the second should contain the target features. • When creating a Mech move, however, it is common for the object features or the target features to be from separate parts. • This is especially common with flat or non-ideal tree structures. For example, when a shaft with two bearings is attached to the rest of the assembly, the two object features will be the outer surfaces of each bearing.
  20. 20. Dimensional Control Systems | 2017 All Rights Reserved • Motion moves allow the model to simulate a single free DoF in an assembly. For example, the opening and closing of a four-bar linkage. • Use the Fixed move after the moves that fully constrain a part. • Use lots of validation measures. • Over-constraint and conditional locators will give you grief. See Mechanical Best Practices Expanded in the Appendix for more details
  21. 21. Dimensional Control Systems | 2017 All Rights Reserved MECHANICAL EXAMPLES Case studies and example models for Mechanical Modeler
  22. 22. Dimensional Control Systems | 2017 All Rights Reserved Examples of Mechanical Analysis
  23. 23. Dimensional Control Systems | 2017 All Rights Reserved Automotive Suspension 1. Validate assembly process 2. Determine the best locators for assembly. 3. Verify that given current GD&T, the product can build and function without failure.
  24. 24. Dimensional Control Systems | 2017 All Rights Reserved Fixtures Set to Reduce Assembly Variation
  25. 25. Dimensional Control Systems | 2017 All Rights Reserved Color Mapping Shows the Problem Zone Mechanical moves are used to check the assembly through an entire range of motion, and the influence at each stage from variation
  26. 26. Dimensional Control Systems | 2017 All Rights Reserved Aircraft Turbine Determining the 3 Dimensional Stack up based on assembly process and part tolerances. Check the clearance of the turbine blades during operations.
  27. 27. Dimensional Control Systems | 2017 All Rights Reserved Aircraft Landing Gear Hatch Validating close conditions: • Gap • Flush Of Landing gear through operation (open/close)
  28. 28. Dimensional Control Systems | 2017 All Rights Reserved Boxcutter Heavy Machinery Check build validation Validate operation: 1. Include part and process tolerances 2. Test different tolerances to see impact on operational functionality
  29. 29. Dimensional Control Systems | 2017 All Rights Reserved Engine Piston Clearance Will manufacturing variation impact the contact points of piston heads to the chamber?
  30. 30. Dimensional Control Systems | 2017 All Rights Reserved GD&T Optimization and Validation Will the piston heads fit and seal during operation?
  31. 31. Dimensional Control Systems | 2017 All Rights Reserved Hinge Model – Shared Modeling • Receive a hinge model from another modeling group • Use Degree of Freedom Counter to check all fo the moves and validate their functionality before completing the model. • Utilize Reporting Model Summary to note changes to existing moves.

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