|  | B |
SECTION B — PERFORMING OPERATIONS; TRANSPORTING

SHAPING

|  | B23 |
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR (punching, perforating, making articles by processing sheet metal, tubes, or profiles Fulltext... Hierarchy... Expanded...B21D; wire-working Fulltext... Hierarchy... Expanded...B21F; making pins, needles, or nails Fulltext... Hierarchy... Expanded...B21G; making chains Fulltext... Hierarchy... Expanded...B21L; grinding Fulltext... Hierarchy... Expanded...B24)

|  | B23 |
Note(s) This class covers: operations not provided for in any other class; combinations of operations covered by different subclasses of classes Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...B21-B24, which combinations are covered by subclass Fulltext... Hierarchy... Expanded...B23P, with the exception of subsidiary operations performed in conjunction with main operations covered by a single subclass; features, specific to machine tools, which relate to a requirement or problem of a nature which is not peculiar to a particular kind of machine tool, e.g. feeding work, which are covered by subclass Fulltext... Hierarchy... Expanded...B23Q, although the realisation of these features may differ according to the kind of machine tool concerned. The said subclass covers such features, in general, even if the feature or a specific function, in any particular case, is to some extent peculiar to, or is claimed only for, machine tools designed for one particular operation; only in exceptional cases are such features classified in the subclass for the machine tool concerned. Certain features of this general nature are, however, referred to subclasses relating to particular metal-working operations, especially Fulltext... Hierarchy... Expanded...B23B, in which case the subclasses in question are not restricted, in respect of those features, to the kind of machine tool with which they are primarily concerned. In this class, the following terms or expressions are used with the meanings indicated: "metal-working" covers the working of other materials unless the context requires otherwise; "kind of operations" and similar expressions relate to such metal-working operations as boring, drilling, milling and grinding; "kind of machine" means a machine designed for a particular kind of metal-working operation (e.g. a lathe); "form of machine" means a machine of a particular kind adapted or arranged for a particular way of working or for particular work, e.g. face-plate lathe, tailstock lathe, turret lathe; "different machines" covers different forms of machines for performing the same type of metal-working operation, e.g. vertical and horizontal boring machines. If details, components, or accessories have no essential feature specific to machine tools, the more general class, e.g. Fulltext... Hierarchy... Expanded...F16, takes precedence.

|  | B23H |
WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL (processes for the electrolytic or electrophoretic production of coatings, electroforming, or apparatus therefor Fulltext... Hierarchy... Expanded...C25D; processes for the electrolytic removal of material from objects Fulltext... Hierarchy... Expanded...C25F; manufacturing printed circuits using precipitation techniques to apply the conductive material to form the desired conductive pattern Fulltext... Hierarchy... Expanded...H05K 3/18) [4]

|  | B23H |
Note(s) This subclass covers the working of metal described as "electroerosion". [4]

|  | B23H |
Subclass index
ELECTRICAL DISCHARGE MACHINING | 1/00
ELECTROCHEMICAL MACHINING | 3/00
COMBINED MACHINING | 5/00
COMMON PROCESSES OR APPARATUS | 7/00
MACHINING PARTICULAR OBJECTS OR OBTAINING SPECIAL EFFECTS OR RESULTS | 9/00
AUXILIARY APPARATUS OR DETAILS | 11/00

|  | B23H 1/00 |
Electrical discharge machining, i.e. removing metal with a series of rapidly recurring electrical discharges between an electrode and a workpiece in the presence of a fluid dielectric [4]

|  | B23H 1/02 |
· | Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits or other abnormal discharges [4]

|  | B23H 1/04 |
· | Electrodes specially adapted therefor or their manufacture (Fulltext... Hierarchy... Expanded...B23H 9/00 takes precedence) [4]

|  | B23H 1/06 |
· · | Electrode material [4]

|  | B23H 1/08 |
· | Working media [4]

|  | B23H 1/10 |
· | Supply or regeneration of working media [4]

|  | B23H 3/00 |
Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte [4]

|  | B23H 3/02 |
· | Electric circuits specially adapted therefor, e.g. power supply, control, preventing short circuits [4]

|  | B23H 3/04 |
· | Electrodes specially adapted therefor or their manufacture (Fulltext... Hierarchy... Expanded...B23H 9/00 takes precedence) [4]

|  | B23H 3/06 |
· · | Electrode material [4]

|  | B23H 3/08 |
· | Working media [4]

|  | B23H 3/10 |
· | Supply or regeneration of working media [4]

|  | B23H 5/00 |
Combined machining [4]

|  | B23H 5/02 |
· | Electrical discharge machining combined with electrochemical machining [4]

|  | B23H 5/04 |
· | Electrical discharge machining combined with mechanical working [4]

|  | B23H 5/06 |
· | Electrochemical machining combined with mechanical working, e.g. grinding or honing [4]

|  | B23H 5/08 |
· · | Electrolytic grinding [4]

|  | B23H 5/10 |
· | Electrodes specially adapted therefor or their manufacture (Fulltext... Hierarchy... Expanded...B23H 1/04, Fulltext... Hierarchy... Expanded...B23H 3/04 take precedence) [4]

|  | B23H 5/12 |
· | Working media [4]

|  | B23H 5/14 |
· | Supply or regeneration of working media [4]

|  | B23H 7/00 |
Processes or apparatus applicable to both electrical discharge machining and electrochemical machining [4]

|  | B23H 7/02 |
· | Wire-cutting [4]

|  | B23H 7/04 |
· · | Apparatus for supplying current to working gap; Electric circuits specially adapted therefor [4]

|  | B23H 7/06 |
· · | Control of the travel curve of the relative movement between electrode and workpiece [4]

|  | B23H 7/08 |
· · | Wire electrodes [4]

|  | B23H 7/10 |
· · · | Supporting, winding or electrical connection of wire-electrode [4]

|  | B23H 7/12 |
· | Rotating-disc electrodes [4]

|  | B23H 7/14 |
· | Electric circuits specially adapted therefor, e.g. power supply [4]

|  | B23H 7/16 |
· · | for preventing short circuits or other abnormal discharges [4]

|  | B23H 7/18 |
· · | for maintaining or controlling the desired spacing between electrode and workpiece [4]

|  | B23H 7/20 |
· · | for programme-control, e.g. adaptive (programme-control systems in general Fulltext... Hierarchy... Expanded...G05B 19/00) [4]

|  | B23H 7/22 |
· | Electrodes specially adapted therefor or their manufacture (Fulltext... Hierarchy... Expanded...B23H 7/08, Fulltext... Hierarchy... Expanded...B23H 7/12, Fulltext... Hierarchy... Expanded...B23H 9/00 take precedence) [4]

|  | B23H 7/24 |
· · | Electrode material [4]

|  | B23H 7/26 |
· | Apparatus for moving or positioning electrode relatively to workpiece; Mounting of electrode [4]

|  | B23H 7/28 |
· · | Moving electrode in a plane normal to the feed direction, e.g. orbiting [4]

|  | B23H 7/30 |
· · | Moving electrode in the feed direction (Fulltext... Hierarchy... Expanded...B23H 7/32 takes precedence) [4]

|  | B23H 7/32 |
· · | Maintaining desired spacing between electrode and workpiece [4]

|  | B23H 7/34 |
· | Working media [4]

|  | B23H 7/36 |
· | Supply or regeneration of working media [4]

|  | B23H 7/38 |
· | Influencing metal working by using specially adapted means not directly involved in the removal of metal, e.g. ultrasonic waves, magnetic fields or laser irradiation [4]

|  | B23H 9/00 |
Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects (heat treatment by cathodic discharge Fulltext... Hierarchy... Expanded...C21D 1/38) [4]

|  | B23H 9/02 |
· | Trimming or deburring [4]

|  | B23H 9/04 |
· | Treating surfaces of rolls [4]

|  | B23H 9/06 |
· | Marking or engraving [4]

|  | B23H 9/08 |
· | Sharpening [4]

|  | B23H 9/10 |
· | Working turbine blades or nozzles [4]

|  | B23H 9/12 |
· | Forming parts of complementary shape, e.g. punch-and-die [4]

|  | B23H 9/14 |
· | Making holes [4]

|  | B23H 9/16 |
· · | using an electrolytic jet [4]

|  | B23H 9/18 |
· | Producing external conical surfaces or spikes (Fulltext... Hierarchy... Expanded...B23H 9/08 takes precedence) [4]

|  | B23H 11/00 |
Auxiliary apparatus or details, not otherwise provided for [4]