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The working principle of small hydraulic press and horizontal hydraulic press
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| 发布时间：2017.01.02 新闻来源：Taizhou Ju da Tools Co., Ltd. 浏览次数： |
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(1) fast down. 1YA electromagnet energized, pilot valve 5 and cylinder valve 6 left access system, the pressure oil into the hydraulic cylinder, the hydraulic control valve 1.1 is opened, the inferior vena oil on hydraulic cylinder through the hydraulic control valve to tank 11, the fast downward on the hydraulic cylinder. At this time, the flow of oil in the system are as follows.
Oil way: hydraulic pump ~ sequence valve 7~ on the cylinder valve 6 (left) ~ check valve on the top of a hydraulic cylinder on the 10.
Back to the circuit: on the hydraulic cylinder under the liquid control valve (11) on the cylinder reversing valve (left) of the cylinder reversing valve (6) of a fuel tank (14).
Under the weight of the role of the rapid decline in the slider. Because of the small flow of hydraulic pump, the oil in the tank by the liquid control one-way valve 12 (also known as oil filling valve) is also on the flow of the hydraulic cylinder to fill the oil.
(2) slow compression. After the sliding block starts to contact the workpiece, the upper pressure of the upper cylinder of the hydraulic cylinder is increased, so that the hydraulic control one-way valve 12 is closed, and the compression speed is determined by the flow rate of the hydraulic pump.
(3) holding pressure delay. When the system pressure to set the pressure relay 9, pressure relay 9 sends electrical signals, controlling the electromagnet IYA power, the pilot valve 5 and cylinder valve 6 is in the middle position, the system in the state of pressure keeping. The pressure holding time is controlled by the time relay in the electrical control circuit. In addition to the hydraulic pump unloading at low pressure, there is no oil flow in the system. The hydraulic pump unloading oil circuit is as follows.
Hydraulic pump ~ sequence valve 7~ on the hydraulic cylinder reversing valve 6 (middle) look at the hydraulic cylinder valve (14) ~ tank.
(4) quick return. The time delay relay to a certain time after the end of packing, 2YA solenoid energized, pilot valve 5 right access system, the pressure relief valve 8 to valve on the hydraulic cylinder 6 in the right access system (described below). At this time, the hydraulic control one-way valve 12 is opened, the hydraulic cylinder quickly returns. The flow of oil is as follows.
Oil way: hydraulic pump ~ sequence valve 7 a hydraulic cylinder reversing valve 6 (right) ~ hydraulic control check valve, a hydraulic cylinder on the lower 11.
Oil circuit: a hydraulic control valve on the upper chamber 12.
(5) in situ stop. When the upper slide block rises to the block and the stroke switch is switched on, the electromagnet 2YA is cut off, the pilot valve 5 and the hydraulic cylinder reversing valve 6 are in the middle position. At this time the hydraulic cylinder stops, the hydraulic pump unloading at a lower pressure. Henan Yangtian hydraulic machinery factory hydraulic machine and Y41 series single column hydraulic machine, three molding hydraulic machine, elbow forming hydraulic machine, hydraulic head forming machine, anti-theft door forming hydraulic machine, hydraulic machine, hydraulic tube tester, hydraulic pipe straightening machine and other specifications, and can be customized a variety of hydraulic design specification for machine and fittings mold according to user needs and so on. |
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