B
SECTION B — PERFORMING OPERATIONS; TRANSPORTING
 B01 - 
B07
Subsection index
LIQUID/LIQUID, LIQUID/GAS OR GAS/GAS SEPARATION
Method
General operationsB01D
by centrifugal force, using centrifuges or free-vortex apparatusB01D
using magnetic or electrostatic effectB03C
Apparatus
General operationsB01D
by centrifugal force, using centrifuges or free-vortex apparatusB04B, B04C
using magnetic or electrostatic effectB03C
SOLID/LIQUID OR SOLID/GAS SEPARATION
Method
General operationsB01D
by centrifugal forceB01D
using centrifuges or free-vortex apparatusB01D
using magnetic or electrostatic effectB03C
Apparatus
General operationsB01D
by centrifugal forceB01D
using centrifuges or free-vortex apparatusB04B, B04C
using magnetic or electrostatic effectB03C
SOLID/SOLID SEPARATION
Method
Dry methods
material in bulkB07B
Individual sortingB07C
Screening, sifting, pneumatic sortingB07B
using pneumatic tables or jigsB03B
by magnetic or electrostatic effectB03C
by centrifugal forceB07B
using centrifuges or free-vortex apparatusB07B
Wet methods
General operationsB03B
flotation, differential sedimentationB03D
screeningB07B
Combinations Dry methods - wet methodsB03B
Apparatus
Dry methods
material in bulkB07B
Individual sortingB07C
Screening, sifting, pneumatic sortingB07B
using pneumatic tables or jigsB03B
by magnetic or electrostatic effectB03C
by centrifugal forceB07B
using centrifuges or free-vortex apparatusB04B, B04C
Wet methods
General operationsB03B
flotation, differential sedimentationB03D
screeningB07B
Combinations Dry methods - wet methodsB03B
  
SHAPING
 B21
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (casting, powder metallurgy B22; shearing B23D; working of metal by the action of a high concentration of electric current B23H; soldering, welding, flame-cutting B23K; other working of metal B23P; punching sheet material in general B26F; processes for changing of physical properties of metals C21D, C22F; electroforming C25D 1/00)
 B21

Note(s)

  1. This class does not cover:
  2. Processes of a kind covered by this class but applied to non-metallic materials are classified in this class if they are applicable to metal and cannot be classified fully in another class.
 B21D
WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING (operations of the kind involved in the manufacture of such products B21B, B21C; working or processing of wire B21F; cutting or severing devices or machines in general B26; presses in general B30B)
 B21D

Note(s)

  1. This subclass covers cutting or perforating of sheet metal or other stock material.
  2. This subclass does not cover the working of metal foils in a manner analogous to the working of paper, which is covered by classes B26, B31.
 B21D
Subclass index
TREATMENT CHARACTERISED BY FUNCTION
Straightening 1/00, 3/00, 25/00
Bending 11/00
of sheets 5/00, 13/00
of rods 7/00, 13/00
of tubes 9/00, 15/00
Twisting 11/00
Corrugating or grooving or bending into waves 13/00, 15/00, 17/00
Punching, stamping, deep- drawing, spinning, high-energy forming 22/00 - 28/00
EDGE TREATMENT; CONNECTION OF PARTS 19/00, 41/00; 39/00
OTHER METHODS 25/00, 31/00, 41/00
COMBINED PROCESSES 21/00, 35/00
HANDLING 43/00, 45/00
OTHER AUXILIARY OPERATIONS 33/00
TOOLS 37/00
SAFETY 55/00
SPECIAL TREATMENT FOR THE MANUFACTURE OF SPECIFIED ARTICLES 47/00 - 53/00
 B21D 1/00 - 
B21D 21/00
Straightening; Restoring form; Bending; Corrugating; Flanging
P:150 B21D 1/00
Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom (B21D 3/00 takes precedence); Stretching sheet metal combined with rolling (working sheet metal of limited length by stretching B21D 25/00; by localised hammering B21D 31/00)  [2]
P:140 B21D 3/00
Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts (straightening of well casings in situ E21B)
P:220 B21D 5/00
Bending sheet metal along straight lines, e.g. to form simple curves (B21D 11/00 takes precedence; corrugating sheet metal B21D 13/00; as edge treatment B21D 19/00)
 B21D 5/01
·  between rams and anvils or abutments
 B21D 5/02
·  on press brakes without making use of clamping means
 B21D 5/04
·  on brakes making use of clamping means on one side of the work
 B21D 5/06
·  by drawing procedure making use of dies or forming-rollers, e.g. making profiles
P:240 B21D 7/00
Bending rods, profiles, or tubes (B21D 11/00 takes precedence; using mandrels or the like B21D 9/00)
 B21D 7/02
·  over a stationary forming member; by use of a swinging forming member or abutment  [2]
P:230 B21D 9/00
Bending tubes using mandrels or the like (B21D 11/00 takes precedence)
P:210 B21D 11/00
Bending not restricted forms of material mentioned in only one of groups B21D 5/00, B21D 7/00, B21D 9/00; Bending not provided for in groups B21D 5/00-B21D 9/00 (corrugating or bending into wave form B21D 13/00, B21D 15/00; flanging B21D 19/00; making helically seamed tubing B21C 37/06); Twisting  [2]
P:160 B21D 13/00
Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form (tubes B21D 15/00)
P:170 B21D 15/00
Corrugating tubes (wrinkle-bending using mandrels or the like B21D 9/00)  [2]
P:180 B21D 17/00
Forming single grooves in sheet metal or tubular or hollow articles
P:190 B21D 19/00
Flanging or other edge treatment, e.g. of tubes (connecting by making use of folds B21D 39/00; flaring out tube ends B21D 41/00)
 B21D 19/08
·  by single or successive action of pressing tools, e.g. vice jaws
P:20 B21D 21/00
Combined processes according to methods covered by groups B21D 1/00-B21D 19/00
 B21D 22/00 - 
B21D 28/00
Stamping; Spinning; Deep-drawing; Working sheet metal of limited length by stretching; Punching
P:90 B21D 22/00
Shaping without cutting, by stamping, spinning, or deep-drawing (otherwise than using rigid devices or tools or yieldable or resilient pads B21D 26/00)
 B21D 22/20
·  Deep-drawing (special deep-drawing arrangements in, or in connection with, presses B21D 24/00)
 B21D 22/26
·  ·  for making peculiarly, e.g. irregularly, shaped articles
 B21D 22/28
·  ·  of cylindrical articles using consecutive dies
P:100 B21D 24/00
Special deep-drawing arrangements in, or in connection with, presses
P:110 B21D 25/00
Working sheet metal of limited length by stretching, e.g. for straightening  [2]
P:120 B21D 26/00
Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces (stamping using resilient pads B21D 22/00)
P:130 B21D 28/00
Shaping by press-cutting; Perforating
 B21D 28/02
·  Punching blanks or articles with or without obtaining scrap (cutting nails or pins from strips or sheet material B21G 3/00); Notching
 B21D 28/04
·  ·  Centering the work; Positioning the tools
 B21D 28/10
·  ·  Incompletely punching in such a manner that the parts are still coherent with the work
 B21D 28/14
·  ·  Dies (ejecting or stripping-off devices arranged in punching machines or tools B21D 45/00)
 B21D 28/24
·  Perforating, i.e. punching holes
 B21D 28/34
·  ·  Perforating tools; Die holders
 B21D 28/36
·  ·  using rotatable work or tool holders
   
P:250 B21D 31/00
Other methods for working sheet metal, metal tubes, metal profiles (dimpling B21D 22/00; perforating by punching B21D 28/24; enlarging tube ends B21D 41/00; deforming one surface of tubes helically by rolling B21H 3/00; upsetting B21J 5/06; working metal by removing material therefrom B23; embossing B44B)
P:10 B21D 33/00
Special measures in connection with working metal foils, e.g. gold foils (cutting or perforating of metal foil analogous to paper B26)
P:30 B21D 35/00
Combined processes according to methods covered by groups B21D 1/00-B21D 31/00 (B21D 21/00 takes precedence)
P:280 B21D 37/00
Tools as parts of machines covered by this subclass (forms or constructions of tools uniquely adapted for particular operations, see in the relevant groups for the operations)
 B21D 37/01
·  Selection of materials  [2]
 B21D 37/04
·  Movable or exchangeable mountings for tools
 B21D 37/14
·  Particular arrangements for handling and holding in place complete dies
 B21D 37/20
·  Making tools by operations not covered a single other subclass
P:60 B21D 39/00
Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating (riveting B21J; uniting components by forging or pressing to form integral members B21K 25/00; welding B23K; press-fitting, force-fitting, or shrinking in general B23P 11/00, B23P 19/00; by adhesives F16B 11/00); Tube expanders
 B21D 39/02
·  of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder
 B21D 39/03
·  of sheet metal otherwise than by folding  [2]
 B21D 39/04
·  of tubes with tubes; of tubes with rods
 B21D 39/08
·  Tube expanders
P:200 B21D 41/00
Application of procedures in order to alter the diameter of tube ends (B21D 39/00 takes precedence)
P:260 B21D 43/00
Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices (cutting devices associated with the tool, see the relevant group for the tool)
 B21D 43/02
·  Advancing work in relation to the stroke of the die or tool
 B21D 43/04
·  ·  by means in mechanical engagement with the work
 B21D 43/05
·  ·  ·  specially adapted for multi-stage presses
 B21D 43/18
·  ·  by means in pneumatic or magnetic engagement with the work
 B21D 43/20
·  Storage arrangements; Piling or unpiling (in general B65G)
 B21D 43/26
·  Stops
 B21D 43/28
·  Associations of cutting devices therewith
P:270 B21D 45/00
Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
 B21D 47/00 - 
B21D 53/00
Processing sheet metal or metal tubes, or processing metal profiles according to any of groups B21D 1/00-B21D 45/00, in the manufacture of finished or semi-finished articles
P:40 B21D 47/00
Making rigid structural elements or units, e.g. honeycomb structures
P:50 B21D 49/00
Sheathing or stiffening objects (by winding wire or tape thereon B65H 54/00, B65H 81/00; specially adapted for manufacturing conductors or cables H01B 13/22)
P:70 B21D 51/00
Making hollow objects (from thick-walled or non-uniform tubes B21K 21/00)
 B21D 51/16
·  characterised by the particular structure or use (making heat exchangers B21D 53/02)
 B21D 51/26
·  ·  cans or tins; Closing same in a permanent manner (making outlet arrangements B21D 51/38; welding or soldering B23K)  [2]
 B21D 51/30
·  ·  ·  Folding the circumferential seam
 B21D 51/38
·  ·  Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels (folded of thin metal foils in the way of making paper caps B31D 5/00)
P:80 B21D 53/00
Making other particular articles (making wire fabrics B21F; making chains or chain parts B21L)
 B21D 53/02
·  heat exchangers, e.g. radiators, condensers (making finned or ribbed tubes by fixing strip material or the like to tubes B21C 37/15)  [2]
 B21D 53/10
·  parts of bearings; sleeves; valve seats or the like
 B21D 53/16
·  rings, e.g. barrel hoops
 B21D 53/26
·  wheels or the like
   
P:0 B21D 55/00
Safety devices protecting the machine or the operator, specially adapted for apparatus or machines dealt with in this subclass (for presses in general B30B; safety devices in general F16P)