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Threads and Fasteners Tutorial: Hexagonal Designs & CAD Techniques

Join us for an interactive session on creating threads and fasteners in CAD, focusing on hexagonal bolt and nut shapes. Prepare for Test 2 with hands-on practice covering chapters 6-10, sectional views, dimensioning, and more. Learn how to create wblocks for reusing designs with three ways to represent threads. Explore internal threads for bolts, nuts, screws, and studs, including detailed specifications and practical problems to solve. Enhance your CAD skills and design efficiency with this comprehensive workshop.

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Threads and Fasteners Tutorial: Hexagonal Designs & CAD Techniques

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  1. Chapter 11: Threads and Fasteners

  2. Agenda Why they are important Creating Threads and blocks to re-use them Creating Hexagonal Bolt and Nut shapes

  3. But First…TEST 2 !!! • Next Saturday 1-2PM • Will Cover: Chapters 6 -10 • Sectional Views • Auxiliary Views • Dimensioning • Tolerancing • Geometric Tolerancing • Open Book and Notes • You may be asked to do a hand sketch • Practice Visualizing aux views…see examples

  4. Sample Auxiliary View Problems

  5. Threads and Fasteners • Most mechanical objects need to be held together • DesignCenter choices are somewhat limited • More flexibility and better clarity by making our own and saving for later use • We’ll use them next week: • working drawings

  6. Design Center Demo • Pre-constructed blocks • Choose Fasteners, US or • Metric • Place, resize, etc

  7. 3 ways to represent threads

  8. Threads—terms and specs Preferred Metric Threads Pitch in threads/mm or threads/inch

  9. Thread specs for English Units (Inches)

  10. Detail Thread (Inches)

  11. Creating wblocks • After drawing the object you want to re-use • Select the object • Type “wblock” • Choose a filename reflecting it’s content: • DETLIN-1in • And a place to store it (myDocs, Desktop, USB) • Then you can choose Insert>Block, find the file, and insert (rotating or scaling first as needed)

  12. MM thread Or try scaling the inch thread by 20 and saving as a new wblock DETLMM

  13. Internal Thread explode then erase, Hatch ANSI 31

  14. Schematic Thread

  15. Metric Thread, scale inch by 20 Save as SCHMMM

  16. InternalSchematicThread Scale by 36/20=1.8 Section using Hash ANSI31

  17. Simplified thread Draw hatch before hidden lines

  18. Ortho & SecViews • Internal Threads

  19. Bolts, Nuts, Screws, Studs

  20. Nuts and Bolts • Hex Head Bolts HEXHEAD-10mm.dwg • Distance across flats should be 1.5D • D=major diameter of the thread • Head thickness should be 0.67D • Finishing Nuts FNUTHEX-10mm.dwg • Thickness = .88D • Locking Nuts LNUTHEX-10mm.dwg • Thickness = 0.5D • Insert and scale to Major Diameter of thread

  21. Sample Problem 11-1: Threaded hole depth Pilot hole depth

  22. SP11-2: Length of bolt

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