Closed forging process for the outer ring of automobile hub

carhubThe closed forging process of the outer ring includes cutting: sawing the blank, heating: heating the blank to 1100-1400°C, upsetting: upsetting the blank on the upsetting equipment to obtain a drum-shaped blank, pre-forging: passing the drum-shaped blank through The pre-forging die is made into a pre-forging, and precision forging: the pre-forging is made into a forging through a precision forging die and a hot forging machine.

The sawing process can better control the precision of the blank blank, reduce the burr of the forging, make the quality difference between the blank and the final forging smaller, and reduce the loss of raw materials. .

The weight difference between the blank and the forging is controlled within 0.3% during punching, which can control the cutting accuracy, reduce the generation of forging burrs, and reduce the waste of raw materials. When designing the forging die, the upper die is designed as a punch, and the lower die extends the cavity Design guide holes on the periphery.

When the mold is closed, the positioning adopts the outer diameter of the punch and the positioning of the guide hole of the lower die, so that the punch moves downward, and in the process, it combines with the lower die cavity to form a closed die cavity, thereby completely forming the For blanks, due to the design of guide holes on the extended profile, the traditional forging die has no bridges and warehouse parts, and flash-free forging is realized.