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crack chasing demo hammer housing

Discussion in 'Other Construction/Demolition Equipment' started by oceanobob, Nov 26, 2018.

  1. oceanobob

    oceanobob Senior Member

    Joined:
    Jun 13, 2010
    Messages:
    579
    Occupation:
    general contractor
    Location:
    oceano california
    This housing version has a bit of a stress riser where the box is cut away and the bents are welded. Noticed some cracks and did the usual stop drill and v groove out. All is well until I decided to look inside the welds by polishing the profile of the crown.

    Will likely run a gusset to mitigate the probable recurrence. Hoping this repair weld will buy some time.

    V groove w rotary file
    PB250658.JPG PB250659.JPG

    Ready to weld w 7018 and weld w porosity
    PB250661.JPG PB250664.JPG

    Flap disc works well to remove splatter, blend arc strikes, and remove ripple to allow fairing....and it also allows a little peek inside the weld. Thinking the casual spray w carb cleaner didnt adequately clean the crack and should have maybe ran the torch over it....too late now, the cooties are in the metal.
     
  2. grandpa

    grandpa Senior Member

    Joined:
    Oct 16, 2009
    Messages:
    1,649
    Location:
    northern minnesota
    You can take a tig welder, turn the heat down as low as it will go and still melt a tiny puddle... you can then chase those little "cooties" away.