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【CN 201811071362.4 】Four-corner leveling system and control method of composite hydraulic press
[CN 201811071362.4] A Four-Corner Leveling System and Control Method of Composite Hydraulic Press Title: A Four-Corner Leveling System and Control Method of Composite Hydraulic Press Application Number: CN 201811071362.4 Applicant: Nantong Forging Equipment Rugao Co., Ltd. Application Date: 2018-9-14 Patent Type: Invention Application The present invention discloses a Four-Corner Leveling System and Control Method of Composite Hydraulic Press, the four-corner leveling system of the composite hydraulic press mainly includes a leveling cylinder, a first displacement sensor, a second displacement sensor, a first pressure sensor, a second pressure sensor, a third pressure sensor, a servo valve, a controller, a high-pressure oil source, and a low-pressure oil Source, oil source switching valve, etc. The invention uses the principle of switching between high and low pressure oil sources to solve the problem of discontinuous motion control during the conversion between the mold opening process of the leveling cylinder and the forced passive leveling process. The control method of the present invention forms a leveling torque through the differential force output of the leveling cylinder on the basis of the leveling force offset, calculates the slider deflection angle by using spatial coordinate conversion, and directly controls the leveling control for the slider deflection angle, thus realizing the symmetry of the control.
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