Jig or Weld Fixture Design — Holes 101

In machine design there are fundamental rules to follow when locating fasteners.  I remember taking drafting classes but I was taught the basics of holes and hole locating only after I started working for Rentapen many years ago.

Mr. Iyer commented on the blog last time that I didn’t talk about construction holes for locating the angled cut on the v-block. He is right! So this video talks construction holes. I just want to add that in the video I put in .313″ construction hole. Looking back at it, a .25″ would have been better for this small part.

Also the video today talks about a major rule of thumb for locating mounting holes.

Mr. Iyer’s comment talked about using a plane that goes from the construction hole to the dowel hole that was zero/zero in the other surface. If this helps, where should I locate the other zero that is normal to that one. Also at the original surface dowel?

Remember, nothing is written in stone here. So if you know a better way or your company does it differently, share that with us in the comment section below!   Are there other rules of thumb you can share?

MORE TO LEARN!

A reader of this blog, Marvin Davis, has shared with us some links to other free education.  It doesn’t appear that any of them are on machine design, but some are on computers and math and so might be of interest to you.  I am sharing the list below.  But before you leave us to surf and learn, be sure to sign up for Rentapen news and updates on the right side of this page.  Then you will be notified of the next Weld Fixture Design 101 blog.

 

The Really Free Schools are Onlinehttp://www.independent.co.uk/life-style/gadgets-and-tech/features/the-really-free-schools-are-online-2353052.html

 

Berkeley Webcasts

http://webcast.berkeley.edu/series#c,s

 

CERN Document Server

http://cdsweb.cern.ch/

 

Harvard Open Learning Initiative

http://www.extension.harvard.edu/open-learning-initiative

 

Houston – University of Houston

http://www.youtube.com/user/UHouston#g/c/4F8EC29025F10C20

 

Indiana Multimedia Distribution System

http://www.imds.iu.edu

 

iTunes U

http://www.apple.com/education/itunes-u/

 

Khan Academy

http://www.khanacademy.org/

 

Math On Line – University of Colorado Colorado Springs

http://www.uccs.edu/~math/vidarchive.html

 

Mathematical Sciences Research Institute

http://www.msri.org/web/msri/home

 

MIT Open Course Ware

http://ocw.mit.edu

 

McGill Courses On Line

http://cool.mcgill.ca/

 

nanoHUB

http://nanohub.org/

 

Open Learn – the Open University

http://www.open.ac.uk/openlearn/

 

Oxford Podcasts

http://podcasts.ox.ac.uk/

 

RSA Animate

http://comment.rsablogs.org.uk/videos/

 

Scribd – Social Publishing

http://www.scribd.com/

 

Stanford Engineering Everywhere

http://see.stanford.edu/see/courses.aspx

 

Video Lectures

http://videolectures.net/

 

Yale – Open Courses

http://oyc.yale.edu

 

YouTube – Education

http://www.youtube.com/education

 

 

 

About rentapen

Susan Straley, aka Queen of Lean Machine Design, is the President of Rentapen Inc. in Waukesha, WI. She helps manufacturers reduce costs through excellence in 3d desing services, RAPid Tooling Components(TM), and Just-in-Time Laser Cutting Services(TM). Susan can be reached directly at 262-542-8891.
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