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12 Apr 2012, 13:02 (Ref:3057811) | #1 |
Rookie
Join Date: Dec 2007
Posts: 7
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Fabricating ARB
I have done some maths and I now need to find a way of forming 28mm EN24.
What kind of machine/process is best? |
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12 Apr 2012, 19:13 (Ref:3057977) | #2 | ||
Racer
Join Date: Nov 2011
Posts: 498
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How about you put up a picture of drawing of what you're trying to do?
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16 Apr 2012, 17:29 (Ref:3060383) | #3 | |
Veteran
Join Date: May 2007
Posts: 3,211
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Before you go to all the trouble of using an alloy steel make it out of mild steel and see what happens. It won't have a long life but it will be cheaper than bending up some expensive material and finding you are a bit off with the calcs.
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16 Apr 2012, 21:39 (Ref:3060513) | #4 | |
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Join Date: Jul 2005
Posts: 1,981
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Forming, by which I assume you mean bending to shape, any alloy of steel 28mm diameter is going to need a great deal of force and be very, very difficult to achieve with any great accuracy.
I would suggest (from experience) that you design the bar and it's location, if at all possible, such that a straight section of 28mm can be accommodated, with arms/levers fitted by means of a square section machined on the ends of the 'cross bar' section (which is what Porsche used on the 911 etc) or if you wish to be more elaborate/sophisticated - splines. The ultimate simple solution is to fit the arms/levers to the 'cross bar' by welding each arm to a tubular section with an ID of 28mm and then cross-drilling and pinning - or running a high tensile bolts through with a nut on the end of each. Note: depending on the stress the bar will see in action, it may or may not be necessary to have the bar heat treated to ensure that it has sufficient tensile strength to return to it's original shape after bending. If it requires heat treatment, then low carbon steel will not be any good, whatever the diameter. The material you choose for a consistent and reliable 'rate' will depend entirely on whether the bar can peform it's duty without becoming over-stressed which would lead to permanent deformation. Imagine you anti-roll bar as a straightened-out coil spring - because that is what it is: Can you imagine what would happen to a mild-steel coil spring in use? It would simply crush over time. Coil springs - and anti-roll bars in MOST applications - need to be made from steel with enough carbon content such that they can be heat treated to perform like a spring. Just to note, EN8 (C=0.4%) E19 (C=0.4%) and EN9 (C=0.5%) all have sufficient carbon to be heat treated and are probably cheaper to buy than EN24 (C=0.4%) Last edited by phoenix; 16 Apr 2012 at 21:55. |
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17 Apr 2012, 00:21 (Ref:3060599) | #5 | ||
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Join Date: Apr 2006
Posts: 1,908
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As Phoenix says, if you are doing your own use a blade type
Cold forming spring steel isn't easy or, just as important, easily repeatable |
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17 Apr 2012, 02:46 (Ref:3060657) | #6 | ||
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Quote:
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17 Apr 2012, 08:02 (Ref:3060730) | #7 | |
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Join Date: Dec 2011
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A little more info on the type of application, use and general design may be of assistance to people to assist you.
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17 Apr 2012, 16:47 (Ref:3061035) | #8 | ||
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Quote:
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