1. Blank manufacture step or blank mold chamber
Upsetting: upsetting billet reduces the height of the billet and
increases the diameter. The billet used for the forgings of the cake.
The diameter of the blank is close to the forging, which is beneficial
to the forming of the forgings, reducing the number of hammer strikes,
improving the life of the die, and removing the oxide skin on the
surface of the blank.
Flattening: flattening the blank so that the blank becomes flat and
widened, and the length of the billet is almost unchanged after
flattening. Most of the forgings are made of flat and wide shape.
Roll extrusion: the local cross section of the billet is enlarged,
the adjacent part is reduced, and the length of the billet is slightly
increased. After rolling, the volume of the billet is accurately
distributed along the axis, making the surface smooth and round. During
operation, the billet is turned 90 degrees around the axis without
Pull out: reduce the local cross sectional area of billet, increase
the length of billet, so that the volume of the billet is redistributed
along the axis. During operation, the billet is turned 90 degrees
around the blank axis and fed along the axis to the mold cavity.
Press shoulder: make the local section of the billet slightly
increase, and the part of the press is widened. In general, the blank is
not turned over.
Bending: bending the blank axis and obtaining a shape similar to
that of the horizontal projection of the forging to meet the final
forging requirement for the forging of the axis.
Two. Die forging or die forging die
Pre forging: the shape close to the final forging is obtained by
pre forging, so that the final forming of the forgings in the final
forging can improve the metal flow conditions, benefit the filling of
final forging, avoid the final forging and increase the life of the die
Final forging: the final forging shape is obtained through final
forging, and all forgings must undergo final forging. There are flash
grooves around the final forging chamber to accommodate excess metal.