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Process description for stamping, sheet metal and fabrication-forming
bulging
Bulging is one of the basic processes of stamping, including local bulging and hollow billet bulging of sheet metal.
Bulging generally requires special equipment and molds. Bulging can produce shapes that are difficult to form by ordinary forming processes, can reduce the number of parts and reduce the weight of the host; but the production efficiency is low and the tooling equipment is complex.
flanging
The flanging is a forming method that makes the sheet metal turn into a vertical edge along a certain curve on the plane part or curved surface part of the forming blank.
coil
The sheet metal is rolled into a cylinder or tube type, and welded into a cylinder or pipe.
Shrink
The necking is a forming method of reducing the diameter of the mouth of a pre-formed hollow opening member or tube.
flaring
Flaring is the opposite of necking, which is a forming method to expand the mouth of a tube or a stamped hollow part. Mainly used in pipe connection.
spinning
Ordinary spinning: the process of forming rotary body parts, including: necking spinning, head spinning, forming spinning, expanding neck spinning, making stems, separation, welding, etc.
Thinning spinning: the same as ordinary spinning, the difference is that the blank wall thickness is significantly reduced in forming and the diameter size is basically unchanged.
thick plate forming
Generally refers to the stamping of large parts with a sheet thickness of more than 6mm.
Considering the forming difficulty of thick plate and die material, hot stamping forming is mostly used in engineering, and sometimes warm pressing and cold pressing are also used. Mainly used for boiler and pressure vessel products on the head forming.
Special stamping
(1) Explosive forming: The method of using the energy released when the explosive explodes to form the blank through the transfer of the medium. Used for punching, powder pressing, plate compounding, etc.
(2) discharge forming: the general term of electric water forming, electric explosion forming and electromagnetic forming.
(3) soft mold forming: the use of elastomer or fluid instead of punch or die pressing metal sheet, pipe stamping method.
(4) hydroforming: only the use of metal punch or die, the use of liquid pressure to press the sheet or tube into the mold for forming-also known as half mold forming.
