How to Calculate Minimum Gauge
Following up on our previous article on tension stress, we wanted to explain how we calculate minimum gauge. Here is the formula we use (thanks to?MD Stone) -??
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Hmin = 3.58 MU D * (S0-S) / E ?????????????? where;?
Hmin = Minimum Gauge? ???????????????
Mu = Coefficient of Friction between the WR and the Strip? ???????????????
D = Work Roll Diameter? ???????????????
S0 = Ultimate Tensile Strength of the strip? ???????????????
S = the Tension Stress in the Strip?
E = modulus of elasticity of the WR material
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This formula works exceptionally well for small WR machines, though it can also be applied to 4-High mills and 6-Highs.
We might note that - ?
1.?????? If you decrease the coefficient of friction, Hmin decreases. Thus, 4-high mills rolling with HiFat oil additives can achieve a lower minimum gauge.?
2.?????? If you reduce the WR diameter, Hmin also decreases.?
3.?????? If you increase the tension stress in the strip (S), a larger value is subtracted from the immutable ultimate tension stress, and yes, Hmin is lowered.?
4.?????? Lastly, the modulus of elasticity (E), which is generally intransient, can be substituted for the much higher modulus of elasticity of a Carbide roll, and, once again, Hmin is lowered.?
It's easy to plug this formula into your equation solver on your phone or computer. It’s an excellent resource for working out minimum gauges for various materials and mills. Try it!
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7 个月Yes, absolutely right !! I used this technique while rolling thinner gauge ( copper XLP coils 0.04mm , 0.05mm , Nickel silver coils 0.07 mm & Pb 0.08 mm ). Work rolls ( diameter & Hardness 50 - 55 VPN ) plays great rolls Thank you