ROLLING OF METAL (auxiliary operations used in connection with metal-working operations covered in B21, see B21C; bending by rolling B21D; manufacture of particular objects, e.g. screws, wheels, rings, barrels, balls, by rolling B21H; pressure welding by means of a rolling mill B23K20/04)

Introduced: September 1968

Description

B21B covers mechanical metal-working processes that reduce, shape, or flatten metal stock through rolling operations, without substantially removing material. This subclass encompasses hot rolling, cold rolling, and warm rolling of various metal forms including ingots, slabs, blooms, and finished products, as well as the associated machinery, rollers, roll stands, and control systems. Typical applications include production of sheets, plates, strips, bars, wire, and tubes through successive passes between rotating rolls. Related ancillary operations such as guide systems, cooling, lubrication, and straightening integrated into the rolling process are included, while B21C and subsequent B21 subclasses separately cover other deformation processes like drawing, forging, and stamping.

Title

Titles differ between systems:

IPC: ROLLING OF METAL

CPC: ROLLING OF METAL (auxiliary operations used in connection with metal-working operations covered in B21, see B21C; bending by rolling B21D; manufacture of particular objects, e.g. screws, wheels, rings, barrels, balls, by rolling B21H; pressure welding by means of a rolling mill B23K20/04)

Full Title

Full titles differ between systems:

IPC:

ROLLING OF METAL

CPC:

ROLLING OF METAL (auxiliary operations used in connection with metal-working operations covered in B21, see B21C; bending by rolling B21D; manufacture of particular objects, e.g. screws, wheels, rings, barrels, balls, by rolling B21H; pressure welding by means of a rolling mill B23K20/04)

Of 37 combined children, 26 exist in both systems.

11 codes are CPC-only extensions.

Note: 11 CPC extensions are marked as secondary classification only.

17 shared codes have differing titles between IPC and CPC.

Child Classifications

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B21B 1/00 Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section (B21B17/00 - B21B23/00 take precedence; with respect to composition of material to be rolled B21B3/00; extending closed shapes of metal bands by simultaneous rolling at two or more zones B21B5/00; metal-rolling stands as units B21B13/00; continuous casting into moulds having walls formed by moving rolls B22D11/06); Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations IPC+CPC Available in IPC and CPC
B21B 11/00 Subsidising the rolling process by subjecting rollers or work to vibrations, IPC+CPC Available in IPC and CPC
B21B 13/00 Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories (B21B17/00 - B21B23/00 take precedence) +5 CPC IPC+CPC Available in IPC and CPC
B21B 15/00 Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills +9 CPC IPC+CPC Available in IPC and CPC
B21B 17/00 Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling IPC+CPC Available in IPC and CPC
B21B 19/00 Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work (straightening by rollers B21D) IPC+CPC Available in IPC and CPC
B21B 21/00 Pilgrim-step tube-rolling +1 CPC IPC+CPC Available in IPC and CPC
B21B 2201/00 Special rolling modes 2nd only +9 CPC CPC only CPC only
B21B 2203/00 Auxiliary arrangements, devices or methods in combination with rolling mills or rolling methods 2nd only +22 CPC CPC only CPC only
B21B 2205/00 Particular shaped rolled products 2nd only +2 CPC CPC only CPC only
B21B 2261/00 Product parameters 2nd only +6 CPC CPC only CPC only
B21B 2263/00 Shape of product 2nd only +6 CPC CPC only CPC only
B21B 2265/00 Forming parameters 2nd only +8 CPC CPC only CPC only
B21B 2267/00 Roll parameters 2nd only +7 CPC CPC only CPC only
B21B 2269/00 Roll bending or shifting 2nd only +3 CPC CPC only CPC only
B21B 2271/00 Mill stand parameters 2nd only +2 CPC CPC only CPC only
B21B 2273/00 Path parameters 2nd only +8 CPC CPC only CPC only
B21B 2275/00 Mill drive parameters 2nd only +2 CPC CPC only CPC only
B21B 23/00 Tube-rolling not restricted to methods provided for in only one of groups B21B17/00, B21B19/00, B21B21/00, e.g. combined processes (B21B25/00 takes precedence) +1 CPC IPC+CPC Available in IPC and CPC
B21B 25/00 Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B21B17/00; Accessories or auxiliary means therefor IPC+CPC Available in IPC and CPC