Showing posts with label steel cutting. Show all posts
Showing posts with label steel cutting. Show all posts

Monday, January 6, 2014

Cut Most of the Way


I’ve mentioned before that I did woodworking in one form or another for some 40 years before getting into blacksmithing.

I had not been into blacksmithing very long when I began noting the similarities and differences in the techniques of the two crafts.  I learned that to do blacksmithing I must become familiar with a new skill set and break some old habits.  One of the first things which struck me as different occurred in cutting stock.

In my wood working experience I cut a measured piece off of the parent stock completely and that was that.  In my blacksmithing I often found it more efficient to cut a piece only part way off.

Examples:

Using the hardy hot cut - I learned not to cut off a piece all the way and let it fly.  Now I cut it most of the way and break it off by hand with tongs and put the hot drop in a safe place.

Cutting a piece of stock for incorporation into a weldment - cut it 90% of the way, put in a convenience bend to position the piece using the parent stock as a handle.  Weld the piece in place and break off the parent stock handle.

Using the bandsaw or a cutoff disc I stop just a but shy of complete severance.  That way I can break off the piece and store the remainder without dropping either on the floor.

When an exact length is not important I use a severing die in the hydraulic press to sever stock cold.  The blade has a slight relief so complete severance is avoided and the bridge is so thin I can snap it with an easy bend.


It seems like I’ve switched from the notion of, by default, cutting for severance to cutting most of the way but leave a thread of attachment.

Notch, bend, use parent stock for handle.

Weld in place and snap off handle.

Friday, October 25, 2013

Torch Cutting Drum


I don’t have to do a lot of torch cutting but I do a little bit fairly often.  I wanted to have a convenient setup by my primary work station where I could torch cut and not make a mess or burn my feet.  The solution was to set up a 30 gallon drum on an elevated base with a rectangular top screen which can span the drum when being used and stored inside when not in use - replaced by a pan top.  I have another piece of screen, as long as the durn is deep, to use when I need to support a longer workpiece.


If I had any bar grating on hand it would have been a better choice, but I didn’t have it.  I used some screen which has approximately 1” square openings and is made from some tool grade steel rod about 1/4” diameter.  I have cut through the rods from time to time so I put MIG tacks to hold the wires in place so I don’t lose pieces.  Numerous repairs have left it looking rather ugly.  I may look for a scrap of bar grating one of these days.