Hydraulic servo stretching pad of press

• Main Authors: LIU JINGJING, ZHU DENGLIN, XU KUN, CHEN CHENG
• Format: Patent
• Language: Chinese; English
• Published: 17.03.2020
• Subjects: MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PRESSES; PRESSES IN GENERAL; PUNCHING METAL; TRANSPORTING; WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL

The utility model discloses a hydraulic servo stretching pad of a press machine. The device comprises a controller, a main motor, a motor driver, a power supply bus, a BOOST converter, a control circuit, a generator, a bidirectional hydraulic pump, an oil tank, a first hydraulic control one-way valve, a second hydraulic control one-way valve, an overflow valve, a first one-way valve, a second one-way valve, an ejection hydraulic cylinder rodless cavity pressure sensor, an ejection hydraulic cylinder, a stretching pad and an upper sliding block. According to the utility model, continuous servoadjustment can be carried out on the blank holder force according to process requirements to adjust the blank holder force of the stretching pad of the hydraulic machine, and meanwhile, the energy ofthe stretching pad is recycled. The hydraulic servo stretching pad of the press machine overcomes the defects of an existing stretching pad, enables the manufacturability of the press machine to be better, and is more energy-s