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[CN 201720132665.7] Hydraulic system suitable for 12~30mm guillotine shearing machine
[CN 201720132665.7] A hydraulic system suitable for 12~30mm guillotine shears Title: A hydraulic system suitable for 12~30mm guillotine shears Application number: CN 201720132665.7 Applicant: Nanjing McPhee Automatic Control Co., Ltd. Application date: 2017-2-14 Patent type: Utility model This utility model provides a hydraulic system suitable for 12~30mm guillotine shears, it includes a main valve body, a left shear cylinder, a right shear cylinder, a first oil tank, a second oil tank and an accumulator; the main valve body includes a main pressure valve, a second two-way cartridge valve, a second electromagnetic reversing valve, Check valve, third two-way cartridge valve, third electromagnetic reversing valve, first electromagnetic ball valve, safety valve and second electromagnetic ball valve, the main pressure valve is the first two-way cartridge valve, and its pilot element is the first electromagnetic reversing valve. The advantages are: inching control; The third two-way cartridge valve and the third electromagnetic reversing valve are adopted to realize automatic liquid filling. A one-way valve is added to realize automatic adjustment of shear angle. A second electromagnetic reversing valve is equipped for the second two-way cartridge valve, which has sequence control function and more reliable material pressing. The second two-way cartridge valve adopts NG25 two-way cartridge valve, which can directly return oil to the oil tank with small back pressure. The tool holder is controlled by logic valve is more stable, no impact, optimized hydraulic system oil circuit.
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