Model for predicting resilience of bar subjected to two roll straightening
A bar and straightening technology, applied in special data processing applications, instruments, electrical and digital data processing, etc., can solve the problems affecting the calculation accuracy of springback, offset, and the distribution of stress on the section of the bar.
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[0046] According to the bar material and specifications produced by a steel factory, alloy steel 40Cr was selected for springback verification. The specific parameters are as follows: yield limit =410MPa, modulus of elasticity E =206GPa, hardening coefficient =0.02812, diameter d =28mm, the original deflection is 10mm / m.
[0047] According to the above data, in the reverse bending radius =915mm, the springback deflection is calculated according to the formula =4.51mm; the experimental value is 4.34mm, and the relative error is 3.92%.
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