MadModder
Gallery, Projects and General => Project Logs => Topic started by: Jonfb64 on January 01, 2013, 02:50:26 PM
-
Hi Guys,
Some of you may remember this from early last year.
(http://i1073.photobucket.com/albums/w397/JonIndigoman/DSCF2214.jpg)
Well after a lot of prevarication and research on YouTube decided to have a go at welding cast iron. Bought some welding rods of e-bay and got to work.
(http://i1073.photobucket.com/albums/w397/JonIndigoman/DSCF2753_zps4a75e66e.jpg)
Forgot to take a photo of the initial grind out of the damage but you get the idea.
(http://i1073.photobucket.com/albums/w397/JonIndigoman/DSCF2754_zps51c5010e.jpg)
This is a shot of the edge where I had to let a piece of cast iron in to fill the void.
(http://i1073.photobucket.com/albums/w397/JonIndigoman/DSCF2755_zpsea8aec6b.jpg)
Final filling welds before mounting on my vertical mill.
(http://i1073.photobucket.com/albums/w397/JonIndigoman/DSCF2756_zpsd90489bc.jpg)
And fitted back on the pillar drill. I had to take nearly 2mm off the front to get the table at right angles to the quill!.
Overall I am very happy with the result and the table has a nice ring when struck showing that it no longer has a crack. :D
-
Nice job.
The big question is 'How can someone make such a mess of the table in the firsrt place ?'
There should be a law against them touching any kind of tool.
Dave.
-
a job well dun
-
:proj:
a job well dun
Ex school I reckon
-
Nice jobb :clap: :clap:
-
Nice job. My table has similar damage - I was going to sink a ring of cast iron into the centre of it and leave the rest, but now I might weld the other holes up like you have.
Did you pre-heat the table or just clean it and weld it cold?
-
Thanks for the comments guys.
The bench drill came from a factory closure and I guess the damage was careless employees. I found that the mounting collar would not lock onto the pillar tight enough and could twist from side to side, hence the nice radial hole pattern. That was easily fixed by splitting the collar all the way through instead of 3 quarters.
Pete.
I cleaned the damage with a small angle grinder to get down to nice clean cast iron, second and third photos. The chap I got the welding rods from on ebay said they could be used cold or with preheat. I went for cold welding and laid short beads of about half an inch at a time down the sides of the channel working from alternate ends and taking regular breaks to avoid too much heat build up. At no time did it get too hot to handle with bare hands, just uncomfortable. Once I had reduced the gap enough I welded down the middle to join the new welds together and then carried on building up till it was proud enough of the table surface for filing and then milling with a fly cutter. I used an old arc welder that I had converted to DC in the past for the welding and my new solar powered automatic welding mask which I can't recommend enough, it has improved my welding considerably. I am no welder so just watched lots of YouTube for tips. The welding rods I used were nickel cast iron "CAST IRON WELDING RODS. 5 pcs. 2.5mm X 300mm Esab OK 92.18". Hope you have success with your repair and don't forget to post pics.
-
Well done and thanks for showing.
John