B21D WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
Introduced: September 1968
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- Subclass:
- WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
Description
B21D covers mechanical shaping and deformation of sheet metal, tubes, rods, and profiles through processes that do not involve material removal, including punching operations. Key processes include bending, folding, deep drawing, stretching, swaging, and flanging of metal workpieces. This classification encompasses both the machinery and methods used for these forming operations, as well as related tools and dies, excluding machining processes classified under B23 that involve chip removal.
Scope Notes
Glossary: profiles profile constructional elements in form of metal bars with a particular cross section different from those of tubes or rods, e.g. a load supporting I-beam | Limiting references: Working or processing of wire, e.g. for making wire fabrics | Application references: Pressing or stamping ornamental design on surfaces Stamping or bending processes for producing ornamental structures Making nails, pins or the like by cutting from strips or sheet material Making chains or chain parts
Related Keywords
29 direct subcodes
Child Classifications
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- B21D 1/00 Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
- B21D 11/00 Bending not restricted to forms of material mentioned in only one of groups , ,; Bending not provided for in groups; Twisting
- B21D 13/00 Corrugating sheet metal, rods or profiles, or bending sheet metal, rods or profiles into wave form
- B21D 15/00 Corrugating tubes
- B21D 17/00 Forming single grooves in sheet metal or tubular or hollow articles
- B21D 19/00 Flanging or other edge treatment, e.g. of tubes
- B21D 21/00 Combined processes according to methods covered by groups
- B21D 22/00 Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D 24/00 Special deep-drawing arrangements in, or in connection with, presses
- B21D 25/00 Working sheet metal of limited length by stretching, e.g. for straightening
- B21D 26/00 Shaping without cutting otherwise than by using rigid devices or tools or yieldable or resilient pads, e.g. shaping by applying fluid pressure or magnetic forces
- B21D 28/00 Shaping by press-cutting; Perforating
- B21D 3/00 Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
- B21D 31/00 Other methods for working sheet metal, metal tubes, metal profiles
- B21D 33/00 Special measures in connection with working metal foils, e.g. gold foils
- B21D 35/00 Combined processes according to methods covered by groups
- B21D 37/00 Tools as parts of machines covered by this subclass
- B21D 39/00 Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D 41/00 Application of procedures in order to alter the diameter of tube ends
- B21D 43/00 Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices