FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES (rolling of metal B21B; making particular products by forging or pressing B21K; cladding or plating B23K; finishing surfaces by hammering B23P9/04; compacting surfaces by blasting with particulate material B24C1/10; general features of presses, presses for consolidating scrap B30B; furnaces in general F27)

Introduced: September 1968

Description

B21J covers mechanical metal-working processes that shape metal through deformation without material removal, including forging, hammering, pressing, and riveting operations. This classification encompasses the machinery, tools, and furnaces used in these processes, such as forging presses, hammers, dies, and the heating equipment necessary for hot-working metals. It applies to both manual and automated systems for cold and hot forming of metals into desired shapes, as well as the assembly of metal components through riveting. Adjacent classifications B21B (rolling) and B21D (sheet-metal working) address rolling and shearing/bending processes respectively, distinguishing them from the compressive deformation methods covered here.

Title

Titles differ between systems:

IPC: FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES

CPC: FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES (rolling of metal B21B; making particular products by forging or pressing B21K; cladding or plating B23K; finishing surfaces by hammering B23P9/04; compacting surfaces by blasting with particulate material B24C1/10; general features of presses, presses for consolidating scrap B30B; furnaces in general F27)

Full Title

Full titles differ between systems:

IPC:

FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES

CPC:

FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES (rolling of metal B21B; making particular products by forging or pressing B21K; cladding or plating B23K; finishing surfaces by hammering B23P9/04; compacting surfaces by blasting with particulate material B24C1/10; general features of presses, presses for consolidating scrap B30B; furnaces in general F27)

IPC and CPC are identically structured here. All 10 subcodes exist in both systems.

5 shared codes have differing titles between IPC and CPC.

Child Classifications

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B21J 1/00 Preparing metal stock +1 CPC IPC+CPC Available in IPC and CPC
B21J 11/00 Forging hammers combined with forging presses; Forging machines with provision for hammering and pressing IPC+CPC Available in IPC and CPC
B21J 13/00 Details of machines for forging, pressing, or hammering IPC+CPC Available in IPC and CPC
B21J 15/00 Riveting IPC+CPC Available in IPC and CPC
B21J 17/00 Forge furnaces (furnaces for heat treatment C21D9/00; furnaces in general F27) IPC+CPC Available in IPC and CPC
B21J 19/00 Blacksmiths requisites not otherwise provided for IPC+CPC Available in IPC and CPC
B21J 3/00 Lubricating during forging or pressing (lubricating in general F16N) IPC+CPC Available in IPC and CPC
B21J 5/00 Methods for forging, hammering, or pressing (for working sheet-metal or metal tubes, rods, or profiles B21D; for working wire B21F); Special equipment or accessories therefor +4 CPC IPC+CPC Available in IPC and CPC
B21J 7/00 Hammers; Forging machines with hammers or die jaws acting by impact (hand hammers B25D; electrical features in section H) IPC+CPC Available in IPC and CPC
B21J 9/00 Forging presses IPC+CPC Available in IPC and CPC