IPC 6 English version B21B !A-B21B 29/00

B21-B21B02900

SECTION B– PERFORMING OPERATIONS; TRANSPORTING

B 21

MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (casting, powder metallurgy B 22; shearing B 23 D; working of metal by the action of a high concentration of electric current B 23 H; soldering, welding, flame-cutting B 23 K; other working of metal B 23 P; punching sheet material in general B 26 F; processes for changing of physical properties of metals C 21 D, C 22 F; electroforming C 25 D 1/00)

B 21 B

ROLLING OF METAL (auxiliary operations used in connection with metal-working operations covered in B 21, see B 21 C; bending by rolling B 21 D; manufacture of particular objects, e.g. screws, wheels, rings, barrels, balls, by rolling B 21 H; pressure welding by means of a rolling mill B 23 K 20/04)

Note

In this subclass, the following terms or expressions are used with the meanings indicated:

–

"rolling" means rolling operations in which plastic deformations occur;

–

"continuous process" means a process employing a mill train designed to have the workpiece enter one pair of rolls before leaving the preceding pair. [2]

Metal rolling methods or mills for making semi-finished products of solid or profiled cross-section (B 21 B 17/00 to B 21 B 23/00 take precedence; with respect to composition of material to be rolled B 21 B 3/00; extending closed shapes of metal bands by simultaneous rolling at two or more zones B 21 B 5/00; metal-rolling stands as units B 21 B 13/00; continuous casting into moulds having walls formed by moving rolls B 22 D 11/06); Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations

for rolling heavy work, e.g. ingots, slabs, billets, in which the cross-sectional form is unimportant

in a continuous process

in a non-continuous process

for rolling work of special cross-section, e.g. rails, I-beams, U-irons, angle steel (rolling metal of indefinite length in repetitive shapes specially designed for the manufacture of particular objects B 21 H 8/00)

in a single two-high or universal rolling mill

in a continuous process

in a non-continuous process

for rolling wire or material of like small cross-section

in a continuous process

in a non-continuous process

for rolling bands or sheets of indefinite length (B 21 B 1/42 takes precedence)

in a continuous process

by hot-rolling

by cold-rolling

in a non-continuous process

in reversing mills, e.g. with intermediate storage reels for accumulating work

by hot-rolling

by cold-rolling

for rolling sheets of limited length, e.g. folded sheets, superimposed sheets (B 21 B 1/40 takes precedence; folding sheets before, or separating layers after, rolling B 21 B 47/00) [2]

for rolling foils which present special problems, e.g. because of thinness

for step-by-step or planetary rolling (making tubes by pilgrim-step rolling B 21 B 21/00)

for rolling metal immediately subsequent to continuous casting (metal-rolling stands B 21 B 13/22; continuous casting B 22 D 11/00, e.g. into moulds with rolls B 22 D 11/06) [3]

Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences (altering special metallurgical properties of alloys, other than structure consolidation or mechanical properties resulting therefrom C 21 D, C 22 F)

Rolling special iron alloys

Extending closed shapes of metal bands by rolling (manufacture of circular shapes, e.g. wheel rims, B 21 H 1/06)

Measures for carrying out rolling operations under special conditions, e.g. in vacuum or inert atmosphere to prevent oxidation of work; Special measures for removing fumes from rolling mills

11/

Subsidising the rolling processes by subjecting rollers or work to vibrations

13/

Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories (B 21 B 17/00 to B 21 B 23/00 take precedence; details, component parts, accessories, auxiliary means, procedures in connection with metal rolling, see the relevant groups)

13/

with axes of rolls arranged horizontally

13/

Three-high arrangement

13/

with axes of rolls arranged vertically

13/

with differently-directed roll axes, e.g. for the so-called "universal" rolling process

13/

all axes being arranged in one plane

13/

axes being arranged in different planes

13/

having counter-pressure devices acting on rolls to inhibit deflection of same under load (counter-pressure devices as such B 21 B 29/00)

13/

with alternatively operative rolls

13/

for step-by-step or planetary rolling (methods B 21 B 1/42; making tubes by pilgrim-step rolling B 21 B 21/00)

13/

for planetary rolling

13/

for rolling metal immediately subsequent to continuous casting (methods therefor B 21 B 1/46; continuous casting B 22 D 11/00, e.g. into moulds with rolls B 22 D 11/06)

15/

Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills

15/

in which work is subjected to permanent internal twisting, e.g. for producing reinforcement bars for concrete

Rolling methods or mills specially designed for making or processing tubes (control of tube rolling B 21 B 37/78)

17/

Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling

17/

with mandrel (B 21 B 17/08 takes precedence) [2]

17/

in a continuous process

17/

in a discontinuous process

17/

with mandrel having one or more protrusions [2]

17/

in a continuous process

17/

in a discontinuous process

17/

without mandrel

19/

Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work (straightening by rollers B 21 D)

19/

the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling

19/

Rolling basic material of solid, i.e. non-hollow, structure; Piercing

19/

Rolling hollow basic material (B 21 B 19/04 takes precedence; separating work from mandrel B 21 C 45/00)

19/

Enlarging tube diameter

19/

Finishing, e.g. smoothing, sizing

19/

the axes of the rollers being arranged essentially parallel to the axis of the work

19/

Rolling tubes by means of additional rollers arranged inside the tubes

19/

Rolling tubes without additional rollers arranged inside the tubes

21/

Pilgrim-step tube-rolling

21/

Rollers therefor

21/

Pilgrim-step feeding mechanisms (B 21 B 21/06 takes precedence)

21/

Devices for revolving work between the steps

23/

Tube-rolling not restricted to methods provided for in only one of groups B 21 B 17/00 to B 21 B 21/00, e.g. combined processes (B 21 B 25/00 takes precedence)

25/

Mandrels for metal tube rolling mills, e.g. mandrels of the types used in the methods covered by group B 21 B 17/00; Accessories or auxiliary means therefor

25/

Guides, supports, or abutments for mandrels, e.g. carriages; Adjusting devices for mandrels

25/

Cooling or lubricating mandrels during operation [2]

25/

Interchanging mandrels

27/

Rolls (shape of working surfaces required by special processes B 21 B 1/00); Lubricating, cooling or heating rolls while in use

27/

Shape or construction of rolls (for rolling metal of indefinite length in repetitive shapes specially designed for the manufacture of particular objects B 21 H 8/02)

27/

Sleeved rolls [5]

27/

with deflectable sleeves [5]

27/

Lubricating, cooling, or heating rolls

27/

internally

27/

externally

28/

Maintaining rolls or rolling equipment in effective condition (lubricating, cooling or heating rolls while in use B 21 B 27/06) [2]

28/

Maintaining rolls in effective condition, e.g. reconditioning [2]

28/

while in use, e.g. polishing [2]

29/

Counter-pressure devices acting on rolls to inhibit deflection of same under load, e.g. backing rolls

B21B 31/00 - B21B 47/04