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PCE
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DIFF Subgroup
B21B 19/08

Enlarging tube diameter

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work > the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling > Rolling hollow basic material > Enlarging tube diameter

CPC:

Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work (straightening by rollers B21D) > the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling > Rolling hollow basic material, (B21B19/04 takes precedence; separating work from mandrel B21C45/00) > Enlarging tube diameter

No child classifications to compare. This is a leaf node in both IPC and CPC.