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[CN 202010877985.1] Process molding method of powder molding hydraulic press
[CN 202010877985.1] Title of Process Forming Method of a Powder Forming Hydraulic Press: Application Number of Process Forming Method of a Powder Forming Hydraulic Press: CN 202010877985.1 Applicant: Tianjin Tianforging Press Co., Ltd. Application Date: 2020-8-27 Patent Type: Application of the Invention The present invention relates to a process forming method of a powder forming hydraulic press, including: S1, the lower hydraulic cylinder is pushed to a set position at a speed V1, s2, control the upper hydraulic cylinder to start ejection at speed V2, S3, the upper hydraulic cylinder enters pressure control, at this time, the openings of the servo valve YAA and the servo valve YAB are maximized, and the flow rate of the servo motor is given a fixed value, so that the upper hydraulic cylinder and the lower hydraulic cylinder are pressurized at the same time, and at the same time, the servo motor is given a pressure command to enter the step pressurization and pressure holding. S4, the pressure command and flow command of the servo motor are given to zero, the servo valve YAA and the servo valve YAB gradually give the opening to the other direction at the same time, and the solenoid valve YA05 and the solenoid valve YA06 are sucked together when the pressure is less than 8MPa to realize two-way pressure relief. S5, after the pressure relief is completed, the upper hydraulic cylinder retreats at speed V3.
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