Cutting-off auxiliary structure for spiral corrugated steel pipe machining

The cutting-off auxiliary structure for spiral corrugated steel pipe machining comprises a base and a semicircular containing shell, a longitudinal notch is formed in the middle of the semicircular containing shell, a transverse through groove is formed in the bottom of the semicircular containing shell, and circular clamping plates are slidably connected to the left side and the right side of the interior of the semicircular containing shell; the bottom of the circular clamping plate is fixedly connected with a sliding rod, and the bottom end of the sliding rod penetrates through the transverse through groove and is connected with a driving device. The positions of the two circular clamping plates in the semicircular placement shell can be controlled through cooperation of the electric push rod, the L-shaped sliding piece and the sliding rod, so that an opening, needing to be cut, of the spiral corrugated steel pipe can be accurately controlled to be aligned with a longitudinal notch, accurate cutting is ach