WebCPC CPC COOPERATIVE PATENT CLASSIFICATION

B21H　MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g.

B21H 1/00 Making articles shaped as bodies of revolution (rolling tubes B21B 17/00 to B21B 25/00)

B21H 1/02 ・discs; disc wheels

B21H 1/04 ・・with rim, e.g. railways wheels {or pulleys}

B21H 1/06 ・rings of restricted axial length (extending closed shapes of metal bands by simultaneous rolling at two or more zones B21B 5/00)

B21H 1/08 ・・railway wheel rims

B21H 1/10 ・・rims for pneumatic tyres

B21H 1/12 ・・rings for ball or roller bearings

B21H 1/14 ・balls, rollers, cone rollers, or like bodies

B21H 1/16 ・・for bearings

B21H 1/18 ・cylinders, e.g. rolled transversely {cross-rolling}

B21H 1/20 ・・rolled longitudinally

B21H 1/22 ・characterised by use of rolls having circumferentially varying profile; {Die-rolling}

B21H 3/00 Making helical bodies or bodies having parts of helical shape (helical gears B21H 5/00; forming tubes or tube walls into helical shape B21D 11/06, B21D 15/04)

B21H 3/02 ・external screw-threads; {Making dies for thread rolling}

B21H 3/022 ・・{combined with rolling splines, ribs, grooves or the like, e.g. using compound dies}

B21H 3/025 ・・{Rolling locking screws}

B21H 3/027 ・・{Rolling of self-tapping screws}

B21H 3/04 ・・Making by means of profiled-rolls {or die rolls}

B21H 3/042 ・・・{Thread-rolling heads}

B21H 3/044 ・・・・{working axially}

B21H 3/046 ・・・・{working radially}

B21H 3/048 ・・・・{working tangentially}

B21H 3/06 ・・Making by means of profiled members other than rolls, e.g. {reciprocating flat dies or} jaws, moved longitudinally or curvilinearly with respect to each other

B21H 3/065 ・・・{Planetary thread rolling}

B21H 3/08 ・internal screw-threads

B21H 3/10 ・twist-drills; screw-taps

B21H 3/12 ・articles with helicoidal surface (bending strip or the like helically B21D 11/06)

B21H 5/00 Making gear wheels, {racks, spline shafts or worms}

B21H 5/005 ・{Worms}

B21H 5/02 ・with cylindrical outline, {e.g. by means of die rolls (worms B21H 5/005)}

B21H 5/022 ・・{Finishing gear teeth with cylindrical outline, e.g. burnishing}

B21H 5/025 ・・{Internally geared wheels}

B21H 5/027 ・・{by rolling using reciprocating flat dies, e.g. racks (B21H 5/022 takes precedence)}

B21H 5/04 ・bevel gears

B21H 5/045 ・・{Finishing bevel gear teeth, e.g. burnishing}

B21H 7/00 Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons (nails, pins B21G 3/30)

B21H 7/002 ・{Fasteners, rivets}

B21H 7/005 ・{railway sleepers or chains}

B21H 7/007 ・{Taper rolling, e.g. leaf springs}

B21H 7/02 ・spades; shovels B21H 7/04 *1*hoes

B21H 7/06 ・ploughshares; axes

B21H 7/08 ・forks; rakes {spoons}

B21H 7/10 ・knives; sickles; scythes

B21H 7/12 ・horse-shoes; articles of like shape, e.g. wear-resisting attachments for shoes

B21H 7/14 ・knurled articles

B21H 7/16 ・turbine blades; compressor blades; propeller blades

B21H 7/18 ・grooved pins; Rolling grooves, e.g. oil grooves, in articles {(B21H 5/00 takes precedence)}

B21H 7/182 ・・{Rolling annular grooves}

B21H 7/185 ・・・{Filet rolling, e.g. of crankshafts}

B21H 7/187 ・・{Rolling helical or rectilinear grooves}

B21H 8/00 Rolling metal of indefinite length in repetitive shapes specially designed for the manufacture of particular objects {e.g. checkered sheets}

B21H 8/005 ・{Embossing sheets or rolls}

B21H 8/02 ・Rolls of special shape

B21H 9/00 Feeding arrangements for rolling machines or apparatus manufacturing articles dealt with in this subclass

B21H 9/02 ・for screw-rolling machines