Plunger assembly seat end shell nosing device and method

The invention discloses a plunger assembly seat end shell nosing device. The plunger assembly seat end shell nosing device comprises a piston shoe shell nosing sleeve, a two-sectional type opposite opening lining, a positioning pin, an annular support and a piston shoe end cover, the opposite opening lining is sleeved with the annular support, the top of the opposite opening lining is covered withthe piston shoe end cover, a shell nosing channel used for clamping a piston shoe is arranged in the piston shoe shell nosing sleeve, and a press machine acts shell nosing pressure on the opposite opening lining through the piston shoe end cover to realize that a plunger rod is downwards pressed into the piston shoe. A technology tool designed for the problem of plunger assembly shell nosing canensure the slow direction of metal in the direction of friction during shell nosing, thus, two spherical surfaces fit uniformly after inclusion, the axial gap is small, the pull-off strength is high,simplicity and high-efficie