PIERCING MILL LINE Russian patent published in 2024 - IPC B21B19/04 B21B39/16 

FIELD: milling.

SUBSTANCE: invention relates to a line of piercing mill. The ruler contains a ruler input cone, on which a profiled section is made, having a convex radius and the longitudinal profile of which begins at the starting point of the ruler profile, and its apex is in the horizontal plane below the level of the ruler pinch point. The profiled section ends at the point of double extension of the mandrel beyond the clamp and turns into a concave profile with a radius that smoothly aligns it with the input cone of the ruler.

EFFECT: accuracy of the geometric parameters of the rolled sleeve increases.

1 cl, 1 dwg, 1 tbl, 1 ex