1. CPC Sections
  2. CPC Section B
  3. CPC Class B23
  4. CPC Subclass B23P
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Version: 2024.08
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CPC
COOPERATIVE PATENT CLASSIFICATION
​​
B23P
METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS (arrangements for copying or controlling B23Q) [2021-01]
NOTES

  • This subclass covers:
    • combinations of work-modifying operations covered by different subclasses of classes B21 - B24;
    • combinations of metal-working operations with non-mechanical treatments of metal not provided for elsewhere, for example in C21D, C22C, C22F or C23.
  • This subclass does not cover
    • non-mechanical operations on non-metallic materials unless such operations are specially mentioned in this subclass;
    • subsidiary operations performed in conjunction with main operations covered by a single subclass, e.g. assembling of parts as an essential feature of a following metal-working operation, since they are not regarded as operations per se.
  • Attention is drawn to the Notes following the title of class B23.
WARNING

  • In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.
B23P 5/00
Setting gems or the like on metal parts, e.g. diamonds on tools [2013-01]
B23P 6/00
Restoring or reconditioning objects (straightening or restoring form of sheet metal, metal rods, metal tubes, metal profiles, or specific articles made therefrom B21D 1/00, B21D 3/00; repairing defective or damaged objects by casting techniques B22D 19/10) [2024-01]
B23P 6/002
.
{Repairing turbine components, e.g. moving or stationary blades, rotors, (B23P 6/045 takes precedence)} [2013-01]
B23P 6/005
. .
{using only replacement pieces of a particular form} [2013-01]
B23P 6/007
. .
{using only additive methods, e.g. build-up welding} [2013-01]
B23P 6/02
.
Pistons or cylinders [2013-01]
B23P 6/04
.
Repairing fractures or cracked metal parts or products, e.g. castings [2013-01]
B23P 6/045
. .
{of turbine components, e.g. moving or stationary blades, rotors, etc.} [2013-01]
B23P 9/00
Treating or finishing surfaces mechanically, with or without calibrating, primarily to resist wear or impact, e.g. smoothing or roughening turbine blades or bearings (treatment covered by a single other subclass, see the relevant subclass, e.g. B24C, C21D 7/00, C22F 1/00); Features of such surfaces not otherwise provided for, their treatment being unspecified [2013-01]
B23P 9/02
.
Treating or finishing by applying pressure, e.g. knurling (B23P 9/04 takes precedence) [2013-01]
B23P 9/025
. .
{to inner walls of holes by using axially moving tools} [2013-01]
B23P 9/04
.
Treating or finishing by hammering or applying repeated pressure [2013-01]
B23P 11/00
Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for  (connecting sheet metal or metal tubes, rods or profiles B21D 39/00; riveting B21J; soldering, unsoldering, welding B23K; hand tools for connecting wire or strip B25B 25/00; connecting metal parts by adhesives F16B 11/00) [2022-08]
B23P 11/005
.
{by expanding or crimping} [2013-01]
B23P 11/02
.
by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits [2013-01]
B23P 11/022
. .
{by using pressure fluids} [2013-01]
B23P 11/025
. .
{by using heat or cold} [2013-01]
B23P 11/027
. . .
{for mounting tools in tool holders} [2013-01]
B23P 13/00
Making metal objects by operations essentially involving machining but not covered by a single other subclass (making specific objects B23P 15/00) [2013-01]
B23P 13/02
.
in which only the machining operations are important [2013-01]
B23P 13/04
.
involving slicing of profiled material [2013-01]
B23P 15/00
Making specific metal objects by operations not covered by a single other subclass or a group in this subclass [2013-01]
B23P 15/001
.
{valves or valve housings (welding B23K; valve housings per se F16K)} [2013-01]
B23P 15/002
. .
{poppet valves} [2013-01]
B23P 15/003
.
{bearings (see also F16C 33/00)} [2013-01]
B23P 15/005
.
{keys (making keys without essentially removing material, e.g. by punching B21D 53/42; milling grooves in keys B23C 3/35)} [2013-01]
B23P 15/006
.
{turbine wheels} [2013-01]
B23P 15/007
.
{injection moulding tools} [2013-01]
B23P 15/008
.
{Rocket engine parts, e.g. nozzles, combustion chambers} [2013-01]
B23P 15/02
.
turbine or like blades from one piece [2013-01]
B23P 15/04
.
turbine or like blades from several pieces [2013-01]
B23P 15/06
.
piston rings from one piece [2013-01]
B23P 15/065
. .
{from metal strip} [2013-01]
B23P 15/08
.
piston rings from several pieces [2013-01]
B23P 15/10
.
pistons [2013-01]
B23P 15/105
. .
{Enlarging pistons} [2013-01]
B23P 15/12
.
gratings {(making gratings by methods covered by other subclasses B21D 47/005)} [2013-01]
B23P 15/14
.
gear parts, e.g. gear wheels [2013-01]
B23P 15/16
.
plates with holes of very small diameter, e.g. for spinning or burner nozzles [2013-01]
B23P 15/18
.
brake shoes [2013-01]
B23P 15/20
.
railroad requirements, e.g. buffers [2013-01]
B23P 15/22
.
cartridges or like shells [2013-01]
B23P 15/24
.
dies (B21C 3/18, B21C 25/10, B21D 37/20 take precedence) [2013-01]
B23P 15/243
. .
{Honeycomb dies} [2013-01]
B23P 15/246
. .
{Laminated dies} [2013-01]
B23P 15/26
.
heat exchangers {or the like (making heat exchangers by methods covered by other subclasses B21D 53/02)} [2013-01]
B23P 15/28
.
cutting tools (sawing tools B23D 63/00, B23D 65/00; files or rasps B23D 73/00) [2013-01]
B23P 15/30
. .
lathes or like tools [2017-08]
B23P 15/32
. .
twist-drills [2013-01]
B23P 15/34
. .
milling cutters [2013-01]
B23P 15/36
. . .
for thread-cutting [2013-01]
B23P 15/38
. .
planing or slotting tools (B23P 15/30 takes precedence) [2013-01]
B23P 15/40
. .
shearing tools [2013-01]
B23P 15/403
. . .
{razor blades} [2013-01]
B23P 15/406
. . .
{rotary or plane die cutters} [2013-01]
B23P 15/42
. .
broaching tools [2013-01]
B23P 15/44
. .
scraping or shaving tools [2013-01]
B23P 15/46
. .
reaming tools [2013-01]
B23P 15/48
. .
threading tools (milling cutters for thread-cutting B23P 15/36) [2013-01]
B23P 15/50
. . .
dies [2013-01]
B23P 15/52
. . .
taps [2013-01]
B23P 17/00
Metal-working operations, not covered by a single other subclass or another group in this subclass [2013-01]
B23P 17/02
.
Single metal-working processes; Machines or apparatus therefor [2013-01]
B23P 17/04
.
characterised by the nature of the material involved or the kind of product independently of its shape [2013-01]
B23P 17/06
. .
Making steel wool or the like [2013-01]
B23P 19/00
Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation {(connecting metal parts or objects by metal-working procedures B21J, B23K)}; Tools or devices therefor so far as not provided for in other classes (hand tools in general B25) [2020-05]
B23P 19/001
.
{Article feeders for assembling machines (screws or nuts being carried by a disposable strip or disc B25B 23/045)} [2013-01]
B23P 19/002
. .
{orientating the articles} [2013-01]
B23P 19/003
. .
{Escapement mechanisms used therewith} [2013-01]
B23P 19/004
. .
{Feeding the articles from hoppers to machines or dispensers} [2013-01]
B23P 19/005
. . .
{by using flowing gases} [2013-01]
B23P 19/006
. .
{Holding or positioning the article in front of the applying tool} [2013-01]
B23P 19/007
. .
{Picking-up and placing mechanisms} [2013-01]
B23P 19/008
.
{the parts being continuously transported through the machine during assembling or disassembling} [2013-01]
B23P 19/02
.
for connecting objects by press fit or for detaching same (B23P 19/10 takes precedence) [2020-05]
B23P 19/021
. .
{Railroad wheels on axles} [2013-01]
B23P 19/022
. .
{Extracting or inserting relatively long parts} [2013-01]
B23P 19/024
. . .
{tube bundles} [2013-01]
B23P 19/025
. .
{For detaching only} [2013-01]
B23P 19/027
. .
using hydraulic or pneumatic means (B23P 19/033 takes precedence) [2013-01]
B23P 19/033
. .
using vibration [2013-01]
B23P 19/04
.
for assembling or disassembling parts [2013-01]
B23P 19/041
. .
{for disassembling pallets} [2013-01]
B23P 19/042
. .
{specially adapted for combustion engines (shape of casings adapted to facilitate fitting or dismantling of engine parts for combustion engines F02F 7/0046)} [2013-01]
B23P 19/043
. . .
{for inserting piston-connecting rods assemblies in cylinders} [2013-01]
B23P 19/045
. . .
{for assembling valve cotters and retainers of engine valves} [2013-01]
B23P 19/046
. .
{Disassembling lids from drums, e.g. by unfolding, for reconditioning or recovery} [2013-01]
B23P 19/047
. .
{for flexible profiles, e.g. sealing or decorating strips in grooves or on other profiles by devices moving along the flexible profile (hand tools therefor B25B 27/0092)} [2013-01]
B23P 19/048
. .
{Springs} [2013-01]
B23P 19/06
. .
Screw or nut setting or loosening machines [2013-01]
B23P 19/061
. . .
{for pipes or pipe-couplings} [2013-01]
B23P 19/062
. . .
{Pierce nut setting machines} [2013-01]
B23P 19/063
. . . .
{Deforming the nut only} [2013-01]
B23P 19/064
. . . .
{Deforming the support material only, e.g. the sheet or plate} [2013-01]
B23P 19/065
. . .
{Arrangements for torque limiters or torque indicators in screw or nut setting machines (for hand tools B25B 23/14)} [2013-01]
B23P 19/066
. . . .
{by electrical means} [2013-01]
B23P 19/067
. . .
{Bolt tensioners (for hand tools B25B 29/02)} [2013-01]
B23P 19/068
. . . .
{by using heating means} [2013-01]
B23P 19/069
. . .
{Multi-spindle machines} [2013-01]
B23P 19/08
. .
Machines for placing washers, circlips, or the like on bolts or other members [2013-01]
B23P 19/082
. . .
{for placing washers on nuts} [2013-01]
B23P 19/084
. . .
{for placing resilient or flexible rings, e.g. O-rings, circlips} [2013-01]
B23P 19/086
. . . .
{Non-metallic protective bellows} [2013-01]
B23P 19/088
. . . .
{Piston rings in piston grooves} [2013-01]
B23P 19/10
.
Aligning parts to be fitted together [2013-01]
B23P 19/102
. .
{using remote centre compliance devices} [2013-01]
B23P 19/105
. . .
{using sensing means} [2013-01]
B23P 19/107
. .
{using oscillating, rotating or vibrating movements} [2013-01]
B23P 19/12
. .
Alignment of parts for insertion into bores [2013-01]
B23P 21/00
Machines for assembling a multiplicity of different parts to compose units, with or without preceding or subsequent working of such parts, e.g. with programme control [2013-01]
B23P 21/002
.
{the units stationary whilst being composed} [2013-01]
B23P 21/004
.
{the units passing two or more work-stations whilst being composed} [2013-01]
B23P 21/006
. .
{the conveying means comprising a rotating table} [2013-01]
B23P 21/008
.
{the assembling machines or tools moving synchronously with the units while these are being assembled} [2013-01]
B23P 23/00
Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass (if the particular kinds of operation are not essential B23Q 37/00 - B23Q 41/00; {working by laser beam combined with other working of metal B23K 26/0093}) [2016-05]
B23P 23/02
.
Machine tools for performing different machining operations (lathes, e.g. capstan lathes, B23B; combined horizontal boring and milling machines B23B 39/02) [2013-01]
B23P 23/04
.
for both machining and other metal-working operations [2013-01]
B23P 23/06
.
Metal-working plant comprising a number of associated machines or apparatus [2013-01]
B23P 25/00
Auxiliary treatment of workpieces, before or during machining operations, to facilitate the action of the tool or the attainment of a desired final condition of the work, e.g. relief of internal stress [2013-01]
B23P 25/003
.
{immediately preceding a cutting tool} [2017-05]
B23P 25/006
. .
{Heating the workpiece by laser during machining} [2013-01]
B23P 2700/00
Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups [2013-01]
B23P 2700/01
.
Aircraft parts [2013-01]
B23P 2700/02
.
Camshafts [2013-01]
B23P 2700/03
.
Catalysts or parts thereof [2013-01]
B23P 2700/04
.
Connecting rods [2013-01]
B23P 2700/05
.
Cooking vessels [2013-01]
B23P 2700/06
.
Cooling passages of turbine components, e.g. unblocking or preventing blocking of cooling passages of turbine components [2013-01]
B23P 2700/07
.
Crankshafts [2013-01]
B23P 2700/08
.
Fittings for doors and windows of buildings [2013-01]
B23P 2700/09
.
Heat pipes [2013-01]
B23P 2700/10
.
Heat sinks [2013-01]
B23P 2700/11
.
Joints, e.g. ball joints, universal joints [2013-01]
B23P 2700/12
.
Laminated parts [2013-01]
B23P 2700/13
.
Parts of turbine combustion chambers [2013-01]
B23P 2700/14
.
Suspension elements of automobile vehicles [2013-01]
B23P 2700/50
.
Other automobile vehicle parts, i.e. manufactured in assembly lines [2013-01]