1 / 25

INTERFERENCE CHECKING

INTERFERENCE CHECKING. BY Paul Thurber. When is a ½” not a ½”. What do you do if it does not fit Who is responsible for the parts and pieces. History of Drafting. Traditional Paper Drafting Artwork Hard to update Hard to Store . The CAD Revolution. Computerized drafting

noura
Download Presentation

INTERFERENCE CHECKING

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. INTERFERENCE CHECKING BY Paul Thurber

  2. When is a ½” not a ½” • What do you do if it does not fit • Who is responsible for the parts and pieces

  3. History of Drafting • Traditional Paper Drafting • Artwork • Hard to update • Hard to Store

  4. The CAD Revolution • Computerized drafting • Faster Drafting • Easier Updating • Easy To Store • Instant Drawings Available

  5. Drafting Practices • Drafter responsible for making parts fit • To insure proper fit tolerances were used • The more accurate the parts the closer the tolerances were required • Locations of features were none standard

  6. Interference Was Engineers Responsibility • Drafters made drawings • Only did some drawings • Complete Assembly • Overall Performance

  7. Tolerance Stacking a Problem • An accumulation of many tolerances a problem • With multiple drawings careful checking needed

  8. No Clear Standards • The World Economy but no World Standards • How TO Convert from Measuring Systems • Quality was Hard to Maintain

  9. Change to Geometric Tolerances • Drafting practices changed • Geometric tolerances were developed • Consistent Drawing Features increases accuracy

  10. Interference Checking • Drafter was now responsible • New standards aided interference • Shop tolerances became standardized

  11. The New 3D CAD • Can now draw in three diminsion • Growing ability to see how parts fit • Multiple views for one part • Solid modeling becomes reality

  12. Animation and CAD • The next revolution was part animation • Exploding parts could be put together • Overall planning and part manufacturing is part of the computer world

  13. CAD/CAM • Computer Aid Design Becomes Computer aid Machining • Drawings become machining programs • Drawings used to automate ordering

  14. Larger Role For CAD • CAD becomes a Major engineering tool • Automation of stresses and design Interference

  15. From the Drawing Into Shop Floor Management • Interference checking goes beyond parts • Shop floor management begins at the design stage • The checking of tolerances is only a small part of the total capabilities

  16. Assembly and Design • Drafting parts with Design Becomes Art Work • Optimization of assembly through animation • Complete Assembly Drawings

  17. Assembly Is Automated • The new CAD/CAM • Becomes point of assembly • Interference checking is automated

  18. Boeing Aircraft • Drafting becomes modular • Can check out designs without parts manufacturing • Computer drafting becomes shop floor management

  19. Tsinghua University • Developed AOPDO • Can make parts to optimize profits • Complete package for Manufacturing

  20. Interference Checking in Assembly • The new programs aid in assembly • Assembly functions can be automated • Each Step is part of whole

  21. Interference Checking Is Quality • The better the fit the higher the quality • Quality is designed into the part • Quality becomes a driving force

  22. Quality is Automated • Interference of Quality needs reduced • Quality is Automated

  23. Winning Customers • Faster modular designs • Customer needs addressed • What is next

  24. Conclusions • Old fashioned is hard to understand • The next step is hard to understand • Can we truly automate manufatcuring

  25. References • “An integrated Framework for the Assembly Oriented Product Design and Optimization” by Qiang Su Ph.D. School of Economics & Management Tsinghus University • “Geo-Metrics II” by Lowell W. Foster • Boeing Aircraft Design Web Page

More Related