A new rotary bending–cropping process for high-strength steel bars via cross rolling

2026-05-28

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Long Ma

Jing Zhou

Qiang Zhou

H. Li

Baoyu Wang *

DOI：10.1016/j.cirpj.2026.05.008

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• A novel rotary bending-cropping process for high-strength steel bars is proposed. • Variable axial convex cone angle roll converts load into smooth distributed bending. • A theoretical deflection threshold model guides die design for crack initiation. • Crack initiation, propagation, and fracture complete in a single rotation cycle. • Fracture surface flatness below 0.35 mm exceeds conventional shearing quality.

Keywords:

rotary bending

high-strength steel

croppping process

die design

fracture surface flatness

A new rotary bending–cropping process for high-strength steel bars via cross rolling

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