Transcript FEH - ENG H191

Engineering H191 - Drafting / CAD
Sectioning of Assembly Drawings
Lecture 14
Autumn Quarter
Gateway Engineering Education Coalition
Lect 14
P. 1
Engineering H191 - Drafting / CAD
Topics for Today
• QUIZ Tomorrow – Sections
• Review - Sectioning of Revolved Solids
• Assembly Drawings
• Wednesday/Thursday – Lab #5
– Material Joining & Beam Bending
– Read the lab notes and procedures before
coming to lab
Autumn Quarter
Gateway Engineering Education Coalition
Lect 14
P. 2
Engineering H191 - Drafting / CAD
Sectioning: Solid Revolutions
Assembly Drawings
• Tips for sectioning solid revolutions
• What is an assembly drawing
• How to section multiple parts in one drawing
• What parts not to section
Autumn Quarter
Gateway Engineering Education Coalition
Lect 14
P. 3
Engineering H191 - Drafting / CAD
Review - Tips For Sectioning Solid Revolutions
• Ribs, webs and other thin features are normally
not sectioned
• Align (rotate into true size & shape):
– Ribs
– Bolt holes
– Lugs
– Spokes
Autumn Quarter
Gateway Engineering Education Coalition
Lect 14
P. 4
Engineering H191 - Drafting / CAD
Assembly Drawing
3
1
• Shows how
multiple parts fit
together
• Orthographic
• Pictorial (1)
• Exploded (2)
• Bill of Materials (3)
Autumn Quarter
Gateway Engineering Education Coalition
2
Lect 14
P. 5
Engineering H191 - Drafting / CAD
Orthographic Sectioned Assembly
• Note cross-hatching style of adjacent parts
Autumn Quarter
Gateway Engineering Education Coalition
Lect 14
P. 6
Engineering H191 - Drafting / CAD
Conventions for Standard Parts
• Not Sectioned – show all exterior features for:
– Shafts
– Bearings, roller or ball
– Gear Teeth
– Threaded Fasteners, Nuts and Bolts
– Rivets
– Ribs, Spokes and Lugs
– Washers
– Keys and Pins
Autumn Quarter
Gateway Engineering Education Coalition
Lect 14
P. 7
Engineering H191 - Drafting / CAD
Example Sectioned Assembly
Autumn Quarter
Gateway Engineering Education Coalition
Lect 14
P. 8
Engineering H191 - Drafting / CAD
Broken Out Assembly With B.O.M.
Autumn Quarter
Gateway Engineering Education Coalition
Lect 14
P. 9
Engineering H191 - Drafting / CAD
Assignments
• Dwg 27 – T49
– Complete section views
– Due at end of today’s lecture
• Dwg 28 – B21
– Sectioned Assembly
– Due at beginning of next lecture
Autumn Quarter
Gateway Engineering Education Coalition
Lect 14
P. 10