Lossless straightening device

The invention provides a lossless straightening device, which is used for carrying out lossless straightening on a long-axis part, and comprises a power assembly used for driving the long-axis part to move and drive the long-axis part to rotate; a support assembly; the straightening assembly can move between the power assembly and the supporting assembly, an electromagnetic generating device is arranged on the straightening assembly, and the electromagnetic generating device is used for applying a magnetic field to straighten the electrified long shaft part; the detection assembly is used for detecting the deformation amount of the long-axis part; and the demagnetizing and conveying assembly is used for driving the long-axis part to move, so that the long-axis part can move to the first pneumatic chuck of the power assembly at the beginning of straightening. The problem that in the straightening process of the long-axis part, the long-axis part is scratched and abraded due to the fact that the lossless straig