Hi, three comments
- you did some numerical calculations re the loading that
the table can support and sized material accordingly. Did
you take into account the "extras" -- such as the dynamic
load of dropping a big hunk of something heavy on the table,
or wailing away on that something with a big f...ing hammer.
Or the off-center/etc loadings that might occur.
Or various lateral loadings.
- All of my benches/tables/etc are on wheels. I found, early on,
that having the foot "stick out" from the basic table, as your
drawings show, is not optimal -- it's something for me to trip
over. It also means that the table takes up more room than its
top -- you need clearance for the feet...
Now, whenever I put wheels on something, I arrange it
so that the whole thing can fit under the table, with nothing
sticking out, and nothing to catch a foot or crash into some other
piece of stuff in the shop...
- Since this is an educational exercise for you as much as anything
else -- I'd suggest that you go ahead and make a table AND be
ready & willing to make changes on the fly, to experiment with it,
and so on. Your professors, no doubt, have taught you the classic
engineering method of first figuring out requirements and then building
to the requirements. The dirty little secret is that requirements are
usually at best vague and poorly formed, they change constantly,
they are simply wrong, and finally, after you deliver the product,
the end user uses it in an unforeseen way... The process where you
build it one way, find out what does and does not work, and then
rebuild it will teach a lot more, both about welding table design and
the way designs evolve in general, and the informal methods that end
up being a part of engineering practice. Don't be afraid to fail at these
iterative steps; as engineers/mechanics/tinkerers/... we learn infinitely
more from our failures than our successes...
Results 41 to 50 of 52
Thread: First Project - Work Tables
01-06-2011, 07:37 AM #41Senior Member
- Join Date
- Sep 2007
- Medford MA
01-06-2011, 06:33 PM #42Junior Member
- Join Date
- Dec 2010
- New Jersey
Good luck with the table guys, I am building one too but it is just me in my garage. By the way, I am a third year Mechanical Engineering student at Rutgers.
01-08-2011, 07:57 PM #43Senior Member
- Join Date
- May 2009
- The Colorado Gas Patch
Here is some ideas for you (post 7,12 &17):
A Bunch of tools
And a forklift to move the heavy stuff with..
Torchmate 2x2 CNC Plasma
It's Miller Time - Get Back To Work!
02-10-2011, 07:10 AM #44
02-10-2011, 07:15 AM #45Junior Member
- Join Date
- Jan 2011
Those are all great points. We have modified the design several times since then. We also have a local manufacturing company that will be supplying all of the materials, and "supervising" the welding. The feet do not stick out past the table top.
We learn far more working on our electric cars and welding projects in our garage then we ever do in class...You're absolutely right. we get to get out there are really live what we are learning.
Thanks to all! Pictures will come as soon as we can finish this thing.
02-10-2011, 09:11 AM #46
PDF files (portable document files) were designed just for business people to send large files worldwide over the internet at high speed. That IS the purpose of a PDF file. But you must select WEB use quality.
You will notice when you save the file there are 3 choices. Files for PRINT. High quality. And files for the INTERNET USE Lower quality
(WEB quality) but still look just fine.
Choose the WEB high speed file for internet use.
If you use a ZIP file then not all computer users can view them. Remember some of us use MAC's
The PDF was expressly designed so that ALL computer users can view the document no matter what computer or program they have.
All computers sold come with Acrobat reader to view the Acrobat PDF files.
You do not need to zip a file that is only 38.1KB. But if it was 38.1MB you would need to reduce the file size.
Now about the tables.
The first one 5 feet by 30 inches.
You will not be able to weld the 3/8 plate OR the 1/2 inch plates for the feet with a Miller 140.
If you weld anything to the table top the table top will be WARPED. BAD DESIGN.
The .035 wire does not run well in the Miller 140 . The .024 wire runs better.
The 1/8 thickness wall 2 inch tubing you can weld if the Miller 140 is turned all the way up.
BUT you will not be able to weld the 1/8 thick 2 inch square tubing to the 1/2 inch thick foot plates.
You will only be able to use the Miller 140 for welding the 2 inch tubing to 2 inch tubing if the Miller 140 is turned all the way up.
Here is what I would do.
Make the frame of the table independent of the table top. The table will stay flat if you do not weld it on.
Do-able with the Miller 140 turned all the way up using .024 wire.
Then weld on feet to the bottom legs but you do not need 1/2 thick material.
Just use 1/8 plates because the purpose of the foot is to be in shear and keep the leg from moving on the concrete floor.
Then attach the table top with counter sunk SCREWS drilled and tapped into the 1/8 thick 2 inch square tubing.
The top of the table is 3/8 inch on your drawing. Think about how many people will be required to lift that table top.
02-10-2011, 09:21 AM #47Junior Member
- Join Date
- Jan 2011
02-10-2011, 02:16 PM #48
Photo of a welding table.
Sorry double post.
02-10-2011, 04:53 PM #49
Go BACK to Post #2.
Look at the miller welding tables.
Also I think a 5 foot table really does need 6 legs NOT 4 legs.
The height of the table is really important since different height people will be using the table.
Better get that worked out and discuss that amongst yourselves..
02-10-2011, 05:10 PM #50
If any one is going to be working on a motorcycle building project the best height for a table is 22 inches because you can sit down while working, AND those hydraulic lift tables can go up to 22 inches. It makes it easy to lift the engine up to that height and scoot it over on to the table. Then you can lower the engine back down when the frame goes out for paint if needed.
30 inches wide is perfect because that is as far as a person can reach.
Length=depends on the motorcycle design.