Several forms of steel rolling in steel pipes

According to the deformation principle of rolled pieces, steel rolling is generally divided into the following three forms:

1. Longitudinal rolling

The running direction (axis) of the rolled piece is perpendicular to the axis of the roll, and the rolled piece moves in a straight line; the production of steel sections, plates, and continuous rolling of seamless steel pipes (a rolled piece is rolled in two or more hole types or racks at the same time is called continuous rolling) all belong to longitudinal rolling.

2. Horizontal rolling

The running direction (axis) of the rolled piece is parallel to the axis of the roll, and the rolled piece makes a rotary motion; the production of locomotive wheels, bicycle axles, etc. belongs to horizontal rolling.

3. Oblique rolling

The running direction (axis) of the rolled piece is neither perpendicular nor parallel to the axis of the roll. In addition to the forward motion, the rolled piece also rotates around its axis and makes a spiral forward motion; the most common seamless steel pipe perforation (except push-rolling perforation and extrusion perforation) production belongs to oblique rolling.