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#1
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Re: 145 + Glue =awesome?
Well those teams suck and they should be kicked out, not that they could enforce that... and the corners are not the weakest spot they have 2 to 3 layers of metal unlike the sides which are long and only 1 layer, unless you varied from the default layout a lot.... i sure hope your right when you say it fits cause it would really suck if you had to take it apart...
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#2
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Re: 145 + Glue =awesome?
Quote:
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#3
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Re: 145 + Glue =awesome?
if you tighten bolts theyll be fine, depending on how much stress you put on the frame epoxy will crack, it usually shatters like glass only with a lot of stress though, im sure the epoxy will work fine it will just suck ifi you make any mistakes
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#4
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Re: 145 + Glue =awesome?
Quote:
Keep that in mind as you explore the wealth of information that's available here. Not only do other students see what you write, but mentors, sponsors and FIRST personnel as well. Do unto others and all that. |
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#5
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Re: 145 + Glue =awesome?
i only make remarks at the teams that have there robot fabricated by someone else(that to me is cheating and defeats the whole purpose of this team activity) , i was trying to figure out why this team would use epoxy when bolts are readily available, then when the team said why i explained the epoxy does break and that properly tightened bolts should not come lose. i'm not being mean, i'm being curious and realistic
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#6
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Re: 145 + Glue =awesome?
I'm curious as to why you don't get your frame welded, it's stronger then epoxy and bolts togther, you dont have any bolts to lose, and you wouldn't believe how much weight you'd save not using bolts. Becides if you're sure enough of your frame design to epoxy it togther you'd be sure enough to weld it, because grinding off the weldded joints would probabally be a compareable ammount of work to that of removing all that epoxy.
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#7
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Re: 145 + Glue =awesome?
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Last edited by lukevanoort : 29-01-2008 at 22:01. |
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#8
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Re: 145 + Glue =awesome?
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and GrammarNazi your being mean a your Well those teams suck and they should be kicked out this is mean everyone's being nice to you about this we(I) do not mind this we just want you to under stand first better remember- this is more about gp than robots -colin |
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#9
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Re: 145 + Glue =awesome?
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I haven't seen any of my welds on a robot "shatter", but every year i have one cracked or fully broken weld (often my crappy welds). What is nice about epoxy is that it has some stretch to it. |
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#10
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Re: 145 + Glue =awesome?
Although some very valid anti-weld points have been brought up, out team has had 3 out of our 5 total robot frames (2008 included) with no trouble from welds cracking, or even the aluminum being weakened from the heat, I think we actualy bent our frame last year from so many hard impacts with both the arena, other robots and various shop components (students included
) and it still has full structural integrity with no strees points showing in metal or welds. I guess one of the main factors would be that they have either been welded with a TIG by students/mentors with more than proficent welding skills or it was sent out to be welded professionally. |
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#11
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Re: 145 + Glue =awesome?
I'm sorry but it seems like the grammer Nazi needs a lesson on gracious professionalism and needs to represent his team better!
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#12
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Re: 145 + Glue =awesome?
wow...interesting idea. i'd have never thought of gluing the chassis together. the past few years we have used 1.5" and 2" bolts that go the top and bottom of the end caps and end rails. much much easier than using all those small bolts that come in the kit. this year and last year we've bought aluminum spacers and faced them down so they fit inside the frame rails (otherwise the rails would bend inwards when tightening down the screws). you can see the bolts and the spacers here: http://www.joemenassa.com/images/rob...s/IMG_8368.jpg.
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#13
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Re: 145 + Glue =awesome?
Metal adheasives CAN be stronger and more cost efffiecint than welding. The mentor that epoxied the frame most likely was trying to expose his team to other joining methods. That is what First Mentors are supposed to do. I try every year to work some composite construction in to our Bot. I posted a picture this week showing another use of epoxy. Hopefully some others saw it and may think of it's use on thier bot.
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#14
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Re: 145 + Glue =awesome?
I think you still cant beat a bolt and the next best thing is a weld.
Look at the comparison of Liberty ships built by the U.S. during WWII with rivets verse welds. And the part about the Aluminum failing around the weld is probable because you're using a thin wall tube (Like 1/16"). |
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#15
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Re: 145 + Glue =awesome?
This is pretty cool, it is always nice to see teams try new things. Exploring new ways to do things is what makes robots in FIRST better every year. Congrats to your team on trying new things and sharing them with the CD community.
We used the kit frame back in 2005, at first we kept having issues with bolts getting lose. So we reassembled it and used red loctite on all the bolts and nuts, never had a problem after that. I am a fan of welding most of our stuff, however not all teams have too many welding capabilities and finding another method will help a lot of other teams get rid of those heavy bolts. ![]() |
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