Vertical large-specific-pressure die-casting process for motor rotor

The invention discloses a vertical large-specific-pressure die-casting process for a motor rotor. The vertical large-specific-pressure die-casting process for the motor rotor is characterized by comprising the following steps that aluminum melting is carried out, specifically, purifying is carried out, and the aluminum temperature is controlled to be 700-720 DEG C; rotor iron cores are laminated; a die-casting melting cup with the diameter of 190 mm is installed below a lower die base plate; all mechanisms of a die-casting machine and a pressure gauge are adjusted, the pressure of a closed mold on equipment is adjusted to be 22-23 Mpa, the pressure intensity of an energy accumulator is adjusted to be 18-19 Mpa, rapid oil supply and pressure building are provided through the energy accumulator in the injection process, a cast aluminum upper die and an upper die exhaust plate are hoisted to be tightly matched with one end of the rotor iron cores, positioning is conducted through a spigot of the cast aluminum up