A steel bar threading machine is an engineering equipment specifically designed for processing straight threads at the ends of steel bars. The threaded ends produced can be combined with steel bar sleeves to achieve the function of mechanical connection for the steel bars. It has a fundamental difference from traditional cutting and threading methods and adopts a cold rolling process, which is the core advantage of this equipment.
The core component of the equipment is a high-hardness threading roller. After the steel bar is fed into the machine, several sets of threading rollers rotate synchronously, applying uniform and stable radial pressure to the surface of the steel bar. At room temperature, the surface metal of the steel bar undergoes plastic flow, and the metal material is compressed and displaced to form standard threads. The entire process does not involve cutting or removing steel.
Cold rolling does not cut the internal metal flow lines of the steel bar, and the material strength is not compromised. Cutting processing will remove part of the steel, and the metal grains are cut, which can easily lead to a decrease in the tensile strength of the threaded end; while the rolling process makes the metal structure at the threaded position more dense, the hardness of the threaded surface increases, the tooth shape is full and uniform, and the load transfer after the sleeve combination is stable and reliable.
This model can be adapted to common steel bar materials such as B500S and 38Si7, and the processing range covers steel bars of 12–40mm. The finished threaded ends meet international steel bar connection standards such as EN 1992 and are widely used in steel bar processing sites on construction sites, bridges, tunnels, subways and other infrastructure projects.
The cold rolling threading scheme is reliable in connection and has high processing efficiency. It is currently the mainstream processing scheme for steel bar connections. If you need detailed parameters or quotations for the steel bar threading machine, please feel free to contact us.
