Richard Furrer Posted June 11, 2013 Share Posted June 11, 2013 Hello All, I found this chart years ago in a 1940's era book on steel. I have found it useful for estimating forces needed for some operations. Ric Quote Link to comment Share on other sites More sharing options...
AndrewOC Posted June 12, 2013 Share Posted June 12, 2013 Neat, thanks Ric. Reminds me of the time i tried to straighten a half finished scroll made of 3/4" square; moved the vice and bench at red heat! Turns out some fool had hand tapered High Speed Steel before giving up from the effort! A. Quote Link to comment Share on other sites More sharing options...
forgemaster Posted June 12, 2013 Share Posted June 12, 2013 For you to do that Andrew it must have been a small light bench and vise. Quote Link to comment Share on other sites More sharing options...
AndrewOC Posted June 12, 2013 Share Posted June 12, 2013 Ha Ha, I'll have u know that was when I was young and muscle-y! A. Quote Link to comment Share on other sites More sharing options...
Richard Furrer Posted June 13, 2013 Author Share Posted June 13, 2013 The chart was the nearest I have come to working out force required for a twisting machine. Rotational charts are not available...or secret. I'd like to see a similar listing for common tool steels....4340,52100,H13 Ric Quote Link to comment Share on other sites More sharing options...
Robert Yates Posted June 13, 2013 Share Posted June 13, 2013 Richard did that come out of the Ol Welders Hand book ? Looks much like the chart in a Very old book I lost years Back Man I miss that book too it had a ton of information in it . Yes it was published in the early 40's too . Sam Quote Link to comment Share on other sites More sharing options...
thingmaker3 Posted June 14, 2013 Share Posted June 14, 2013 Ric, according to a couple works I've read on spring making, you can use 35% to 52% of the UTS for estimating torsional yield strength. And THANK YOU for posting this chart! I've been looking all over the web for something of that nature. Quote Link to comment Share on other sites More sharing options...
pjh66 Posted June 14, 2013 Share Posted June 14, 2013 It would be great to find a chart with the yield strength. Some materials have a low yield with a high UTS, others the yield is very close to the UTS. It would be interesting how the compare at different temps. Quote Link to comment Share on other sites More sharing options...
Richard Furrer Posted June 16, 2013 Author Share Posted June 16, 2013 Richard did that come out of the Ol Welders Hand book ? Looks much like the chart in a Very old book I lost years Back Man I miss that book too it had a ton of information in it . Yes it was published in the early 40's too . Sam I'll look around Sam, but I have a HUGE library of these older works and ten years ago I photocopied the most interesting sections and made a booklet of what I thought was "critical cool" in steelmaking and forging. This image came from that endeavor. If I could rig up some form of gauge I could do yield studies at various temps...but I have no idea what that gauge would look like. I sold my twisting machine: 5hp model here (would do 1.75" mild steel easily and 1.5 stainless at 2200F, but much less of a twist angle) and am building a 15hp version for 3" square...possible 4" frankly I have no real idea as to what it will be capable of....but rest assured I will find a way to stall it. I can not let Danger Dillon have all the fun with big work. Ric Quote Link to comment Share on other sites More sharing options...
basher Posted June 17, 2013 Share Posted June 17, 2013 really useful chart Ric . thanks Quote Link to comment Share on other sites More sharing options...
evfreek Posted June 17, 2013 Share Posted June 17, 2013 Remember that the force required for a specific operation also depends (heavily) on the strain rate. http://www.esm.vt.edu/%7Erbatra/pdfpapers/confproceeding1994%28533-537%29.pdf Quote Link to comment Share on other sites More sharing options...
Richard Furrer Posted June 18, 2013 Author Share Posted June 18, 2013 So...given that charted info on the 1151 steel...I wonder what the optimum rotational rate (RPM) would be for twisting various steels. Could one get more rotations if twisted slower. With most things I try to twist as fast as possible so as not to lose heat...with the machine it is a given RPM and all you can do is work with heating and cooling or take several heats. Ric Quote Link to comment Share on other sites More sharing options...
Robert Yates Posted June 19, 2013 Share Posted June 19, 2013 Thank you Rick just when you get a chance will be fine . Sam Quote Link to comment Share on other sites More sharing options...
DanielC Posted June 19, 2013 Share Posted June 19, 2013 That is a seriously impressive video. Quote Link to comment Share on other sites More sharing options...
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