engineering drawings meen 476 department of mechanical engineering brigham young university
TRANSCRIPT
Engineering Drawings
MeEn 476
Department of Mechanical Engineering
Brigham Young University
This week in class
• January peer reviews due Friday
• Career Fair Prep Wednesday
• Career Fair Thursday
• Monday’s class will be Integrity in Engineering and Technology
• Robust Design will move to Feb. 13
Today’s objectives
• How to make a great drawing• Anatomy of a component drawing• Anatomy of an assembly drawing
• Guidelines for checking drawings
• Assignment 2 is to check a drawing package.
How to make a great drawing
Put yourself in the shoes of the outsider who will make your parts…
• Can I make this part from the drawing I made?• Can my drawing be misinterpreted by
someone else?• Has the required Geometry, Material, and
Processing been addressed?• Does my work look good and professional?
How to make a great drawing
Know what to include in the drawings• Can I make this part from the drawing I made?• Can my drawing be misinterpreted by someone else?• Has the required Geometry, Material, and Processing
been addressed?• Does my work look good and professional?
Know the anatomy of a drawing…
Palm Treo Dock
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Anatomy of a Component Drawing
Ask yourself…
• What level of detail is included in the drawings?
• Is this level of detail important? And Why?
• Do the drawings have more or less information than the solid model?
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Anatomy of a Component Drawing
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Anatomy of a Component Drawing
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Standard Views of Orthogonal Projections
Anatomy of a Component Drawing
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Auxiliary Views
Anatomy of a Component Drawing
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Dimensions with Tolerances
Anatomy of a Component Drawing
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Cross Section Views
Anatomy of a Component Drawing
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Detail Views
Anatomy of a Component Drawing
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Manufacturing Details
Anatomy of a Component Drawing
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Notes on Material, Processing, and other important information
Level of Detail in Notes
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Detail in Reference Documents
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Anatomy of a Component Drawing
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Title Block
The Title Block
Tolerances and Drawing Items
Approvals
Document Information
Bill of Materials / Parts List
Anatomy of a Component Drawing
Revision Block
Anatomy of a Component Drawing
Statement of Confidentiality
Comments and Questions?
Assembly Drawings
BOM and Assembly Intent
Not all information contained in Solid Model
Quality and Manufacturing Notes
Reflection…
Ask yourself…
• What level of detail is included in the drawings?
• Is this level of detail important? And Why?
• Do the drawings have more or less information than the solid model?
• Are these detailed drawings really needed?
Checking Drawings
• Format Check• Have we properly applied the recommended
format?• Equivalent to word processing spell checking
• Design Check• Have we executed the design intent properly?• Equivalent to proofreading and editing a
document
Format Check
• Title block -- is it completely filled out?
• Dimensioning -- are standard practices followed? Do we have tolerances and surface finishes specified?
• Notes -- are they complete
• Views -- do we have the proper number and kind?
Design Check
• Are the dimensions accurate? Do the dimensions make sense for the intended function?
• Are the surface finishes and tolerances appropriate for the part?• Let tolerances be loose where they can be
• Can the design be simplified?
• Can the drawing be misinterpreted?
Exercise
• How many improvements can you identify on each of the drawings in your handout?