{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

engr 111a 9.1 dimensions

engr 111a 9.1 dimensions - ENGR111AFall2009 October26,2009...

Info icon This preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
Basic  Dimensioning with  AutoCAD ENGR 111 A                Fall 2009   Class 9.1 October 26, 2009
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Were You Mom’s Favorite??
Image of page 2
Learning Objectives Be able to understand the basic rules of dimensioning Apply dimensions to objects in accordance with engineering standards Define the following items: Dimension line, Extension line, Reference dimension, and Leader
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Basic Dimensioning Dimensions allow a part to be manufactured Dimensions are ALWAYS in real world units Dimensions should be applied in a concise, coherent manner
Image of page 4
Dimensioning Terminology
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Dimensioning Rules Avoid placing any dimensions on the part (inside of the view) unless there is no other option (fig 4.5) Avoid Dimensioning to hidden lines (fig. 4.6) Dimension the most descriptive view. Avoid using "T" joints. (fig 4.7) Always dimension holes in their circular view by stating the diameter. (fig 4.8) Dimension rounded corners and arc features as radii where they appear in their rounded views. (fig 4.9) If the same value is repeated many times, then use a general note for the features (fig 4.9) Dimension cylindrical objects as diameters in their rectangular view. (fig 4.10) First row 3 times the letter height away from object. Second row an additional 2 times the letter height. (fig 4.11) Keep dimensions between views whenever possible (fig 4.12) Extension lines may cross each other and over other lines on the part, but dimension lines should never be crossed. The over all dimension should always be given. (fig 4.13) Do not duplicate dimensions and avoid using unnecessary dimensions. (fig 4.13)
Image of page 6
Dimensioning Rules When all dimensions are expressed in inches, do not use inch mark (“) or abbreviation for inches (in). For drawings dimensioned in inches, values less that one inch should not be preceded with a zero. For metric dimensions less than 1 mm, place a zero in front of the decimal point.
Image of page 7

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern