MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS (making particular articles by working sheet metal without essentially removing material B21D; processing wire B21F; making pins, needles or nails B21G; making particular articles by rolling B21H; forging machines, pressing machines, hammering machines, in general B21J; making chains B21L; plating B23K)

Description

B21K covers mechanical metal-working processes that form metal products through forging, pressing, or similar deformation techniques without substantial material removal. This includes manufacturing discrete metal articles such as rivets, bolts, horseshoes, wheels, and other components shaped by impact, pressure, or combined force. The classification encompasses both the machinery and methods for cold or hot forming operations, as well as finishing steps integral to the forging or pressing process. Adjacent classes (B21C-B21F) address continuous or specialized metal-forming operations, while B21H-B21J cover metal-cutting and surface-treatment activities excluded from this subclass.

16 direct subcodes

Child Classifications

Navigate with arrow keys, Enter to open

B21K 1/00 Making machine elements
B21K 11/00 Making cutlery wares; Making garden tools or the like
B21K 13/00 Making locksmiths' goods, e.g. handles for cases
B21K 15/00 Making blacksmiths' goods
B21K 17/00 Making sport articles, e.g. skates
B21K 19/00 Making articles for agricultural machinery
B21K 21/00 Making hollow articles not covered by a single preceding sub-group (essentially from sheet-metal or uniform thin-walled tubes B21D, e.g. B21D41/00, B21D51/00)
B21K 23/00 Making other articles
B21K 25/00 Uniting components to form integral members, e.g. turbine wheels and shafts, caulks with inserts, with or without shaping of the components (uniting by interference- or press-fitting B23P11/02, B21K19/02)
B21K 27/00 Handling devices, e.g. for feeding, aligning, discharging, Cutting-off means; Arrangement thereof
B21K 29/00 Arrangements for heating or cooling during processing (for preparing metal stock to be forged or pressed B21J1/06; heating equipment per se, see the appropriate classes, e.g. H05B)
B21K 3/00 Making engine or like machine parts not covered by sub-groups of B21K1/00; Making propellers or the like
B21K 31/00 Control devices specially adapted for positioning tool carriers
B21K 5/00 Making tools or tool parts, e.g. pliers
B21K 7/00 Making railway appurtenances; Making vehicle parts
B21K 9/00 Reconditioning railroad accessories, e.g. rails