Energy-saving features of servo hydraulic presses
Release time:
2022-06-28
Let's talk about servo hydraulic press energy-saving features
Servo hydraulic presses can improve performance and save energy
In ordinary hydraulic presses and directional control circuits, the AC servo hydraulic press, combined with a fixed oil pump, forms a controllable hydraulic source, replacing the ordinary induction motor-driven uncontrollable hydraulic source. Combined with various sensors, it achieves energy-saving system pressure, position, and speed control through motor control. The servo hydraulic press adds displacement sensors to the main and auxiliary cylinders and an oil pressure sensor to the main cylinder to achieve closed-loop control of position, speed, and pressure.
Servo hydraulic presses can improve performance and save energy
(1) Common sense operational errors, such as three-phase inversion, insufficient oil in the tank, and pressure relief valves not boosting, often occur among new operators.
(2) Insufficient power supply, generally appearing in older servo hydraulic presses, either due to pump wear or motor aging. Place your hand on the oil pipe to check if the servo hydraulic press is pressurized. If the suction is strong, the pump is fine, and motor aging is less likely. In fact, aging often produces loud noises because it cannot handle such a large force.
(3) Oil leakage. First, there are no obvious signs of oil leakage on the surface of the servo hydraulic press, and there is no damage to the oil seal piston, as it's impossible to have a solution that would cause oil leakage.
(4) Hydraulic valve disconnection, valve blockage, or internal spring damage by impurities preventing reset, may cause the pressure to not open. If it's a manual valve, disassemble it.
(5) Hydraulic pressure gauge damage is also possible.
Increasing the proportion of the auxiliary cylinder outlet safety valve in the servo hydraulic press achieves the floating edge of the blank holder on the pressure side of the auxiliary cylinder. The motor is used for high-power AC servo hydraulic presses, and the connection between the motor and the controller is achieved by controlling the motor speed to achieve flow control, main oil volume control, and voltage regulation. Taking full advantage of the high-power AC servo hydraulic press's speed, controllability, adjustability, and reliability, it optimizes process parameters, thereby improving the performance of the hydraulic press and reducing energy consumption. Hydraulic processing is important equipment driven by a motor hydraulic pump to generate high-pressure liquid, producing linear motion through a hydraulic cylinder. Servo hydraulic presses are widely used in metal and non-metal forming due to their wide adaptability. Using a high-power AC servo hydraulic press instead of an ordinary induction motor in a hydraulic press can simplify the hydraulic system structure, improve performance, and save energy.
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What are the characteristics of a hydraulic press?
CNC hydraulic oil pumps generally use internal gear pumps, while traditional hydraulic presses generally use axial piston pumps. At the same flow rate and pressure, the noise of an internal gear pump is 5 dB to 10 dB lower than that of an axial piston pump. The motor of a CNC hydraulic press runs at rated speed during pressing and return, and its noise emission is 5 dB to 10 dB lower than that of a traditional hydraulic press. When the slider rapidly descends and is stationary, the servo motor speed is 0, so the CNC hydraulic press has essentially no noise emission.
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Application scope and system selection of small hydraulic presses
Suitable applications for small hydraulic presses include: 1. Punching various silicone and plastic buttons for mobile phones or remote controls, and cutting plastic products; 2. Cutting various protective films for mobile phones, digital cameras, and laptop LCD screens, as well as precision cutting and halving of various pressure-sensitive adhesives and trademarks; 3. Embossing, forming, etc., of various PV, PE, PC and other thin-film switches and panels; 4. Pressing and forming various flexible circuit lines for laptop keyboards, etc. Small hydraulic presses use original Taiwanese or Japanese parts for the hydraulic power system, resulting in fewer malfunctions, high efficiency, low noise, low horsepower requirements, easy maintenance, and convenient adjustment of output, speed, and stroke.
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Technology Daily (Reporter Shi Junbin, Correspondent Jiao Yue) Recently, a 19,500-ton free forging hydraulic press and a 300-ton/750-ton-meter full hydraulic forging manipulator, independently developed by China Heavy Industry Corporation, successfully completed their first hot load test run in Jiangyin, Jiangsu Province. This marks the completion of the world's largest tonnage free forging hydraulic press and the world's largest clamping force/clamping torque full hydraulic forging manipulator currently in operation, achieving a globally advanced level of overall equipment installation. The 19,500-ton free forging hydraulic press adopts a three-beam, four-column, three-cylinder, top-drive, press-insert, full pre-stressed frame structure. Both the upper and lower beams use pre-stressed composite beams. The maximum forging capacity can reach 4
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