show cage build

admin

A good friend is in the finishing stages of a body off restore of a 73 Bronco.He came to me to have the show cage fitted, welded up, and installed.Lots of notching and trimming had to be done in order to get unit to follow the steel roof and dash.  Enjoy-Flange weldintersection hot !   finished-Graham-Mechanical EngineerAutosport Mechanic/Fabricator
Reply:Keep'em coming!! I'll post pics of my brothers '76 after awhile..Those Bronco's are  ...zap!I am not completely insane..Some parts are missing Professional Driver on a closed course....Do not attempt.Just because I'm a  dumbass don't mean that you can be too.So DON'T try any of this **** l do at home.
Reply:Nice work!!And then, after so much work...... you have it in your hand, and you look over to your side...... and the runner has run off. Leaving you holding the prize, wondering when the runner will return.
Reply:Yeah, pretty welds too, maybe just stack them up a little more...My Babies: HF Drill pressHF Pipe Bender3   4.5" Black and Decker angle grindersLincoln Electric PROMIG 175that´s it!
Reply:Originally Posted by elvergonYeah, pretty welds too, maybe just stack them up a little more...
Reply:Looks good!  What sort of motion do you use?
Reply:Originally Posted by SupeLooks good!  What sort of motion do you use?
Reply:Originally Posted by grahamtheengineerStack them up, for looks ?  That wouldn't increase the integrity of the weld, it would just take me more time and use more consumables to do that !  Plus, I laid several test welds for the owner and he was more than pleased with the "looks" of the bead.
Reply:Originally Posted by elvergonwell that´s just me then... I´m pretty sure they´re good enoughBy stack them up I mean get ripples closer, not for looks, just for avoiding cross sectional changes in the area of the weld, which could be stress concentration points and of course that means more consumables... But those are some great welds, as said, maybe just my style
Reply:Ok, ok  you got me in the "show stuff". Now learning a little bit... As far as what I´ve learn, totally correct about stress concentration effects. We do not take them into but this is assumming a perfect weld was done, that´s why we calculate based of the fact that we can treat it as a solid material right?Next, as far as my book and my experience says (pretty low I should add), I think that stress concentration is made in the smaller cross section area, in this case, it would look like something like the pic I´m attaching. That´s why I was taught that fillet welds should have the same base and height measurement. Here´s the book I´m basing my knowledge of... Hibbeler- Mechanics of Material Sixth Edition...Please correct me if I´m wrong... thanks! Attached ImagesMy Babies: HF Drill pressHF Pipe Bender3   4.5" Black and Decker angle grindersLincoln Electric PROMIG 175that´s it!
Reply:As far as your first response is concerned, yes you are correct.  We do assume that the welder knows what he is doing and has created proper fusion between the base metals and the weld bead.  That is why I stated, “you would be more concerned with proper root penetration, an excessive root gap or an undersized weld throat which would effect how stress concentrations developed along the toe/heel.”I do not completely understand the rest of your response, but based on the picture from your school textbook, I have an understanding of what you are asking/stating.  The minimum cross section area that is being depicted in the picture is for calculating shearing stress across the minimum cross sectional area.  It is NOT explaining stress concentrations.  I hope you understand the difference.  The reason that is the minimum cross section area is because most fillet welds are assumed to be laid at a 45 deg. angle relative to the two pieces of metal being adjoined.  If you use simple trigonometry to find the minimum cross sectional area of any fillet weld completed in such a manor, the answer would be the plane highlighted in your picture. This is the throat area and would equal ---->  0.707*h (where h is the nominal size of the weld) (see pic below). Now back to your first post about the overlap…..I hope you can see how the overlap of the bead in my case would barely effect the height and base of the bead.……unless you are laying down beads that are inconsistent in size; meaning the throat will have an hour glass shape if looked at from a top view, (see attached pic for a better understanding) which would alter the cross section area and then decrease the amount of stress the weld could carry at that specific location. One last note:  Recall that stress concentrations occur where there are abrupt changes in cross sectional area and at sharp corners.Last edited by spiral-cut-bevel; 10-10-2007 at 12:39 PM.-Graham-Mechanical EngineerAutosport Mechanic/Fabricator
Reply:Yup I agree completely with you...I´m sorry, we carry classes in spanish, thus I don´t really know the correct terms for everything, now I know what throat and nominal size means. I think that the last pic that you posted show what I was talking about. I circled with green where I think there could be a small throat change, that´s why I suggested stacking them up a little more.  I´m guess I´m going crazy about perfection, maybe its because we´ve just finished taking exams...sorry about that. You laid some pretty nice welds though.Thanks for the classes! Attached ImagesMy Babies: HF Drill pressHF Pipe Bender3   4.5" Black and Decker angle grindersLincoln Electric PROMIG 175that´s it!
Reply:Those welds are just fine   for an easier clean-up, since the customer is fussy,  try using a little anti spatter spray around the weld zone.  makes the BB's fall right off
Reply:Originally Posted by proweldThose welds are just fine   for an easier clean-up, since the customer is fussy,  try using a little anti spatter spray around the weld zone.  makes the BB's fall right off
Reply:do you have more pics of the truck? My Babies: HF Drill pressHF Pipe Bender3   4.5" Black and Decker angle grindersLincoln Electric PROMIG 175that´s it!