MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS

Introduced: September 1968

Last revised: July 1974

Classification Context

Section:: PERFORMING OPERATIONS; TRANSPORTING
Class:: GRINDING; POLISHING
Subclass:: MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS

Description

B24B encompasses machines, devices, and processes for grinding and polishing operations, including surface finishing techniques that use abrasive tools or compounds. The subclass covers grinding machines (stationary and portable), polishing equipment, lap machines, and honing devices, as well as methods for dressing or conditioning abrading surfaces to maintain their cutting efficiency. It includes systems for supplying and controlling grinding, polishing, or lapping agents (coolants, lubricants, abrasive slurries) during finishing operations. Adjacent subclass B24A covers abrasive articles themselves, while B24C and B24D address specific grinding applications in tool sharpening and saw blade maintenance.

Scope Notes

Glossary: Grinding Grinding means machining by fixed abrasive particles in its most general sense and covers "corrective" operations, such as correction of dimension, e.g. diameter, or shape, e.g. roundness. It is characterised by a comparatively high material removal rate. Polishing Polishing means abrading a work so as to improve, e.g. smoothen, its surface, without substantial change of dimension or shape of the work as would occur in grinding. Abrading Abrading is used in its most general sense to mean mechanically removing material by a multitude of fixed or loose particles that are forced into the surface of the work so that each particle cuts away small chips of material Honing Honing means abrading by means of one or more, often compliant, fine grit abrasive blocks or stones along a controlled path of combined movements, including a reciprocating movement, in order to smoothen a surface or to produce a defined surface texture such as a cross-hatch pattern. Superfinishing Superfinishing means abrading by means of one or more fine grit abrading blocks or an abrasive band pressed by a shoe (bandfinishing) along a controlled path of combined movements. Typically, the block or shoe is oscillated with a short stroke and relatively high frequency while the work is rotated, in order to improve surface finish or produce a defined surface texture such as a cross-hatch pattern. Superfinishing is also referred to as microfinishing, or short-stroke honing, in the art. Lapping Lapping is surface finishing by rubbing the surface of the work and the surface of a lapping tool, e.g. a lapping plate or lapping pad, that is mostly shaped corresponding to the work surface, against each other, mainly with loose abrasives rolling and sliding between the surfaces; the abrasives may be dispersed in a liquid medium, i.e. a slurry, or in a paste, or fixed to the lapping pad Burnishing Burnishing means plastically deforming a work on a small scale by means of rubbing or rolling a tool, e.g. a roller or ball, on the work. It is not an abrading operation but used as an alternative to abrasive finishing operations in order to improve the surface finish or surface hardness of the work. Conditioning Conditioning is used in its most general sense to mean truing by removing material from the abrasive tool to maintain tool geometry, e.g. concentricity, or to (re-) profile a form into the abrasive surface, sharpening by removing small amounts of binding material from the abrasive surface to expose abrasive grains or by breaking abrasive grains to produce sharper cutting edges on the grain, cleaning the surface of an abrasive tool or a lapping pad in order to remove debris from the space between the grains or pores of the pad. Dressing Dressing is used as a synonym for conditioning | Limiting references: Abrasive or related blasting with particulate material Working metal by electro-erosion, e.g. electrolytic grinding , Electrolytic etching or polishing | Application references: Grinding of gear teeth Grinding of screw threads , Grinding arrangements for use on assembled railway tracks

Related Keywords

grinding or polishing CORALgrinding or polishing CRYSTALSFETTLING of castings or similar articlesFINISHING of surfaces by grinding or polishingFROSTING surfaces by abradinggrinding or polishing of GEM(S)machines or devices for abrasive or polishing of GLASSgrinding or polishing GRANITELAPPINGgrinding or polishing MARBLE(S)POLISHING of stoneSAND papering apparatusSANDERS for grinding or smoothingSCRATCH -brushingSHARPENING -devices designed as components of machines with cuttersSMOOTHING by abrasive grinding or polishingSNAGGINGabrasive grinding or polishing of STONE(S)polishing STONE(S)grinding of sanding WOOD

28 direct subcodes

Child Classifications

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B24B 1/00 Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
B24B 11/00 Machines or devices designed for grinding spherical surfaces or parts of spherical surfaces on work; Accessories therefor
B24B 13/00 Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
B24B 15/00 Machines or devices designed for grinding seat surfaces; Accessories therefor
B24B 17/00 Special adaptations of machines or devices for grinding controlled by patterns, drawings, magnetic tapes or the like; Accessories therefor
B24B 19/00 Single purpose machines or devices for particular grinding operations not covered by any other main group
B24B 21/00 Machines or devices using grinding or polishing belts; Accessories therefor
B24B 23/00 Portable grinding machines, e.g. hand-guided; Accessories therefor
B24B 25/00 Grinding machines of universal type
B24B 27/00 Other grinding machines or devices
B24B 29/00 Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
B24B 3/00 Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
B24B 31/00 Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work or the abrasive material is loose; Accessories therefor
B24B 33/00 Honing machines or devices; Accessories therefor
B24B 35/00 Machines or devices designed for superfinishing surfaces on work, i.e. by means of abrading blocks reciprocating with high frequency
B24B 37/00 Lapping machines or devices; Accessories
B24B 39/00 Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor
B24B 41/00 Component parts of grinding machines or devices, such as frames, beds, carriages or headstocks
B24B 45/00 Means for securing grinding wheels on rotary arbors
B24B 47/00 Drives or gearings for grinding machines or devices; Equipment therefor