Cold forging usually refers to the forging process of metal blank below recrystallization temperature, and it is a forging forming method that has developed rapidly in recent years. Therefore, it is necessary to tell students the technological characteristics of cold forging and its similarities and differences with hot forging. In particular, cold heading, a widely used material, should tell students its processing technology and process in detail.
Cold forging can be divided into upsetting, extrusion, die forging, stamping and die forging.
Cold upsetting process
Cold heading forging is a forging method which uses a die to exert a striking force on a metal blank, making it axially compressed and radially expanded. The deformation characteristics of upsetting are mainly the increase of cross-sectional area or local cross-sectional area of blank, and the formed parts are mostly upsetting rod-shaped or disc-shaped parts.
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The upsetting rate of integral upsetting is a technological index to measure the axial deformation degree of blank during integral upsetting.
Upsetting, also known as upsetting, can redistribute the metal volume and form a certain local thickening.