The mass of a stand can add to the effective mass of an anvil, but only if it is stiff enough to return the energy back into the workpiece while it is still being deformed. It's interesting to think that the colder and more elastic the work is, less deformation and more rebound will happen-at 40:1, you could easily lose more energy to bouncing off cold material than to a sloppy stand.įrosty, yes, it seems like rapidly diminishing returns above 20:1 or 40:1. The lost non-work% (the motion of the anvil into the springs) is the energy that is available to be recovered by a better, stiffer stand. Elasticities in the hammer, anvil, or workpiece would come out of the effective work % assumed to deform the workpiece, and that loss would end up as kinetic energy in rebound, or noise. Overthinking things, here's a table of hammer:anvil ratios, and, assuming your anvil is mounted on soft springs, and a clay-like workpiece deforms and absorbs all the energy it can to decelerate the hammer and accelerate the anvil into a perfectly inelastic collision: Yup, I had a bad day, and a good Talisker port rouge in front of me now in the end you'll find what works best for you and that's what matters. Try a different foot, try a different fixing method. Sometimes it's a bad idea, sometimes it's a good idea. Just like anvils. Half the fun (for me at least) of blacksmithing / bladesmithing is experimenting with stuff. And once you start working on something, improvise. It starts with your mind, you motivation, and flows from there. A small anvil is no excuses for not delivering good work and having a massive workshop with all the tools, presses and tons of anvils is no excuse either to not deliver good work. Sometimes it's more important to just "do" and don't worry. It's virtually impossible a part of the "experienced mass" doesn't come from the base.īut I have learned to NOT overthink a lot of things, as I tend to do that (a couple good whisky's usually fix that problem ) . You'll be amazed how "heavy" the tiny anvils feels. Take a sledgehammer head weld a square spike on it go outside and beat it in a stump of wood preferably still with roots. ĭo the experiment of the stump anvil and you'll be amazed. Hence forth power hammer anvils' mass are between 1/5 to 1/20. They also found that the fixing method of the anvil to the frame mattered in noise, but not in deformation. Below 1/20 it was usefull to get a bigger anvil. They experimentally measured this and found that from a 1/20 ratio between hammer/anvil the increases in mass of the anvil didn't really increase deformation proportionally.
#ANVIL WEIGHT 3HER HOW TO#
I found an article about it once someone tried to find out how to mathematically find out how heavy an anvil had to be to be "optimal" for a power hammer, in this article they described resonance, vibration and plastic deformation of the workpiece. This is also why a steel tripod with a really strong fixation works so well. I think - and take this with a grain of salt - that the harder you fix your anvil down, in combination with the reduction in resonance-difference between anvil and foot the more energy will be reflected into the deformation of your work. The other one doesn't vibrate in your shoes
You feel the hit in your feet through the concrete. The one where I glued the wood stump also to the concrete with the same glue it feels "heavier" under the hammer. Would a 66# anvil epoxied to a 66# box of sand work like a 132# anvil on a stool? Joey's tiny anvil was moving around under the clamps with each hit-A small anvil might "work" for a short job, but people really seem to think the big ones are worth it. Setting it in a bed of sandy dirt on the ground didn't seem to do too much to the ring. I also clamped the base to a flimsy bit of 3/8" plywood with some wood clamps, and that also quiets the ring somewhat. I can quench the ringing with a magnet, gripping a horn in a fist, clamp, a plumbing T, or jamming a chunk of 2x4 over it. Geeking out like an engineer, I worked out the natural frequency of a similarly-sized steel beam ( ) and it doesn't seem too far off from the tone. Resonance-wise, I have a shiny #66 Acciao anvil and it rings brightly. Did epoxying make any other difference than the ring? Epoxy deadened your ring, but you have the same mass. Yeah, I was thinking about the way that "mass", "resonance", and "working" are different issues.
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