Yes, almost every part had to be repaired. It was a bad purchase. It took me too much time. Serious error of judgment ---- Although it is very cheap, my only satisfaction is that it gives me a chance to learn a new mechanical structure ----- whooQuite the project. Seems like every part on this drill press needs work. You'll have a wonderful tool when done.
Get a patch to reinforce it
I know what you mean, adding a patch to the abdomen for stress is best ---- thank youI won't comment at all on your gantry crane plans, but I will comment on your I-Beam repair. It important to remember that the strength of an I-Beam is mostly determined by the size of the flanges and by their separation, not by the size of the web separating them. The reinforcing plate that you added to the web probably adds very little to the overall strength of the beam. If you calculate the moment of area for the beam, which determines its strength, you will see what I mean.
If you are worried about the strength of the repair, I would add plates to the top and bottom flanges instead. (You do not have to remove the plates on the web.) If you plan to use a trolley, add the plates to the other side of the flange so they don't interfere with the trolley wheels. It doesn't matter very much which side of each flange it is added to.
Thank you for your advice. I will find a professional welder to evaluate the welding quality.Hi A Smile. I recommend you should find a local welder to inspect the welds. To me - and I mean no offence - they appear to bridge too much air space, are full of porosity, and don't look like the weld heating zone has penetrated deep into the metal. I expect those welds will fail. I am not a qualified welder - and I think you should find one for a hands on inspection.
What is the thickness of the metal? How many amps and what voltage was used to do the welding?
I think you should cut that weld out and do a very straight cut on both sides. Abandon the tricky cut. This would allow the material to be butted together touching all along. A v-groove may be required. Clamp it tight together. Tack weld in places and then weld the seam. Then apply patches to reinforce the flanges. I don't know though this is just a possible approach.
I know we have some pro welders on here - can any of you provide better advice?
@johnnielsen ? TIG? Stick? MIG? Rod type? Amps and Voltage?
A. Smile I found the reference pages for tig welding beveled butt joints. This is for the reference text the procedure handbook of arc welding. You can see they recommend 4 weld passes for 1/4” (6mm) thick material joints with a steel backing.
Another doubt is that I found that the pictures sent by other friends in the forum are showing slightly reduced pictures, while the pictures I sent are directly displayed. Will this take up more resources and space of the forum? Hope to get a clear reply, so as to timely adjust my sending method, as far as possible not to occupy too much forum resources, thank you!
If there is any inappropriate behavior, please let me know, I will improve, thank you