Hydraulic electrohydraulic ratio control system and method for prebending machine
An electro-hydraulic proportional and control system technology, applied in fluid pressure actuation system components, mechanical equipment, fluid pressure actuation devices, etc. Effect
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[0020] The hydraulic electro-hydraulic proportional control system of the pre-bending machine of the present invention includes a hydraulic proportional valve closed-loop control system and a slider outer-loop closed-loop control system. The hydraulic proportional valve closed-loop control system consists of a hydraulic proportional amplifier 203, a large flow electro-hydraulic proportional directional valve 205 and a spool. The inner loop feedback 208 is composed. The slider outer loop closed-loop control system is composed of the numerical control system 201, the pre-bending machine slide 207, and the outer loop speed position feedback 209 of the grating ruler. The numerical control system 201 is electrically connected to the proportional valve amplifier 203 through the voltage control signal 202. Connection; the proportional valve amplifier 203 is electrically connected to the large-flow electro-hydraulic proportional directional valve 205 by driving a large current 204; the la...
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