Jigging we just tried |
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superdupercolin
Bolt Sorter Joined: May/31/2014 Status: Offline Points: 16 |
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Posted: Mar/29/2015 at 1:13am |
Anyone else try this? It works really well but took forever to setup.
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Nate
Welding Master Joined: Jun/16/2014 Location: Ames, IA Status: Offline Points: 285 |
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On an extreme scale, yes. We also do our A-arms via a similar setup. Intersecting 2D laser-cut sheet metal seems to be a breeze to assemble so it doesn't take so long.
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Iowa State University Cyclone Racing 2013 - 2016
Tech Director, DAQ, Media, Manufacturing, Radios 2016 - S&T, Maneuv, & Endurance Driver "Because BAJA" "Because RACECAR" |
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superdupercolin
Bolt Sorter Joined: May/31/2014 Status: Offline Points: 16 |
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Do you have any more pictures of the jigging you used? That looks pretty wicked
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Nate
Welding Master Joined: Jun/16/2014 Location: Ames, IA Status: Offline Points: 285 |
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http://www.facebook.com/IowaStateBaja there might be some more on there... and give us a "like" while you're at it.
Here was the model. Basically we made a 4x8 flat aluminum jigging table. Then we used sheet metal to locate critical points (first the roll hoop so it was square. Then things like the FBMs and Lower frame rails. To give it rigidity and keep all 2D parts, we intersected everything 90 degrees when we could. I used a lot of "intersection curves" to determine the correct dimensions. We also lightened things up when possible. The laser takes no time to cut these out.
Here's a condensed drawing for some of the parts. uploads/2424/Sheet_Metal_Jig_Parts.PDF |
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Iowa State University Cyclone Racing 2013 - 2016
Tech Director, DAQ, Media, Manufacturing, Radios 2016 - S&T, Maneuv, & Endurance Driver "Because BAJA" "Because RACECAR" |
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ankitk
Welding Master Joined: Jul/17/2013 Status: Offline Points: 108 |
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Would teams be kind enough to upload a few images of the fixtures they have used? Last time our team used wooden fixtures. While the 2D fixtures were accurate, cheap and quite helpful, the 3D ones were a PITA and pretty inaccurate. A few photographs and an explanation (if needed) would help us get some ideas and do things right this time
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Rollie
Welding Master Joined: Nov/07/2012 Location: FH, MI Status: Offline Points: 133 |
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We have quite a few pictures on our facebook page:
https://www.facebook.com/pages/Kettering-University-Baja-SAE/441336775898625?ref=hl We used a 0.25" 4x8' sheet with water-jet holes and then tapped them for our multiple fixtures. The main constraints were d-shaped shaft collars that were mounted to the plate. All of our tubes are laser-cut so assembly is crazy simple. 3 day frame! |
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Zac Watts
2013-2015 Kettering University 2016-* KU Industry Advisor Team Captain Design Engineer at Pratt & Miller Engineering |
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jarmumd
Organizer Joined: Oct/17/2008 Location: Huntsville, AL Status: Offline Points: 178 |
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It's an investment, but we (Auburn) has been using optical tables for a decade now. These have hundreds of 1/4 threaded holes spaced an inch apart.
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Auburn Baja 03-05
Masters involving dynamic simulation of baja car and driver SAE Auburn Race Organizer 06, 09, 12, 15 SAE Birmingham Race Organizer 11 National Tech. Inspector 07-15 |
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ankitk
Welding Master Joined: Jul/17/2013 Status: Offline Points: 108 |
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Thank you for the highly helpful images. I don't we would be able to afford an optical table at the moment. Rollie's idea of waterjetting holes is a nice alternative to an optical table. We mainly had issues in the SIM members. Sim was bend at one end (rrh end) and was made in two parts. One from the FBM. Pictures attached below.
http://tinypic.com/r/6syp6s/8 http://tinypic.com/r/2hftnv9/8 |
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Rollie
Welding Master Joined: Nov/07/2012 Location: FH, MI Status: Offline Points: 133 |
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If you look at my second to last picture you could use a similar setup with the square tube and shaft collars to hold those tubes where you want them.
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Zac Watts
2013-2015 Kettering University 2016-* KU Industry Advisor Team Captain Design Engineer at Pratt & Miller Engineering |
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ankitk
Welding Master Joined: Jul/17/2013 Status: Offline Points: 108 |
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Some images of the fixtures we used last year. Tubes coped manually, frame welded manually. Entire car assembled in 10 days. Our material arrived super late last year(late by over 3 months)
http://tinypic.com/r/209rgqe/8 http://tinypic.com/r/vq1edh/8 http://tinypic.com/r/2w6yro3/8 http://tinypic.com/r/2r41jis/8 http://tinypic.com/r/jrtmw2/8 |
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nikhilb
Double Secret Probation Joined: Aug/15/2019 Status: Offline Points: 2 |
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