Thanks so much for the responses.
To elaborate, the 1/4" plate is bolted to another member such that it is installed in a vertical position. The pin extends out of the plate roughly two inches and then a steel strap with a whole (slightly larger then pin diameter) is hung from the pin. The strap supports loads vertically only (or parallel with the plate/perpendicular with the pin). Because the hanging strap must be installed flush with the plate, a weld from the pin to the plate can not be made on the outside. However because the plate is being bolted to another member, the pin can not extend very far beyond the inside of the plate (1/16" is about as far as it can go).
Beveling out the plate is not a cost effective solution for this item. Our welder has been just welding all around the inside of the pin. We are testing this part to determine the load carrying capability and our current method is more than exceeding our expectations; however I am not sure what to call that type of a weld?
As you mentioned by definition it is a fillet weld, but because the weld is 4X less than the thickness of the smaller member, then I don't know if it qualifies for a fillet??? I also am trying to determine if it is necessary to provide special inspection on all parts fabricated in this fashion.
Thanks again for your insight.
Well, it is still a fillet weld. What code does your contract require?
In AWS D1.1 for example, the minimum weld size for prequalified joints (on 1/4" plate) would be 1/8" unless it is dynamically loaded in which case it would be 3/16". In your case the prequalified joint option cannot be used. You would have to run your own qualification tests.
Even a partial penetration weld with the 1/16" fillet weld to reinforce it may be better than just the fillet weld. I've seen 1/8" bevel prep done with a reamer. It takes no time at all. Anyway just a comment. Your testing may prove that this additional welding is not necessary.
Is the purpose of the 1/16" weld only to prevent the pin from slipping out of the hole? Are there any conditions that could lead to radial cracking of the weld? Once in service, is it possible for the pin to slip out of the hole if the weld were to fail? Can the weld be inspected while in service?
Just some afterthoughts ............
I did not notice the reply from vb above. Just to clarify, the pin is welded to the 1/4" plate on the side with the 1/16" stickout. 2" of the pin extends beyond the plate on the other side. A hanger with a 1-1/4" hole is installed on the pin and fits flush with the plate. The hanger is not welded to the pin or to the 1/4" plate. Please let me know if I'm off base. I'll try to pay better attention.......
Thanks
strap85 :
Based upon your posts, no matter how you slice it, it is a fillet welld.
Forum replies welcome.
This pin is loaded as a cantilever? That is there is no support on the end away from the quarter inch plate? Is it cyclically loaded? I don't know the loads involved but the weld sounds tiny (only a guess).
You could form a groove by drilling back from the off side of the plate with a larger drill (or a countersink) half way or so through the plate. As long as these plates are something liftable I would expect to do 50 or so in a hour (with a drillpress).
You could form a groove by pointing the end of the pin.
You could form a larger fillet by shortening the pin and then putting the weld on the inside of the hole. I'm not fond of this one, it's difficult to weld well and depends completely on the weld not failing.
The trouble with things that look strong like this is that, if accessable, sooner or later somebody will hook a come-along to it and use it to lift the counterweight off a forklift.
Bill