An electro-hydraulic servo system for high-frequency fine-blanking forming equipment
A technology of electro-hydraulic servo system and forming equipment, applied in the field of electro-hydraulic servo system, can solve the problems of fast-forward steering and large fluctuation of working speed, and achieve the effects of high pressure control accuracy, fast system response, and improved production efficiency
Active Publication Date: 2017-09-26
WUHAN UNIV OF TECH
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Problems solved by technology
[0003] The technical problem mainly solved by the present invention is to provide an electro-hydraulic servo system for high-frequency fine-blanking forming equipment to improve punching precision and processing efficiency in view of the problem of large fluctuations in speed when turning from fast-forward to work-in.
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[0013] Further explanation in conjunction with accompanying drawing:
[0014] Such as figure 1 As shown, an electro-hydraulic servo system of high-frequency fine-blanking forming equipment (the system uses a plunger to unload under the action of gravity), including a fine-blanking action execution cylinder (ie figure 1 fine blanking machine cylinder), the valve control system for controlling the action of the cylinder, the constant pressure output valve, and the oil pump; the valve control system includes the servo controller and the servo valve; The output end of the sensor is directly connected to the input end of the servo controller, the output end of the servo controller is connected to the control input end of the servo valve, and the valve opening of the servo valve is controlled by the servo controller; the fine punching action executes the oil cylinder The oil inlet is connected to the oil tank by the oil inlet pipe. The oil inlet pipe is equipped with a servo valve ...
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The invention relates to an electro hydraulic servo system for high-frequency fine-blanking forming equipment. The electro hydraulic servo system for the high-frequency fine-blanking forming equipment is characterized in that the electro hydraulic servo system comprises a fine-blanking action execution oil cylinder, a valve control system, a constant-pressure output valve and an oil pump, wherein the valve control system is used for controlling the oil cylinder to act. The valve control system comprises a servo controller and a servo valve. A sensor used for detecting the pressure of an oil cylinder is arranged at an oil inlet of the fine-blanking action execution oil cylinder. The output end of the sensor is directly connected to the input end of the servo controller. The opening degree of a valve port the servo valve is controlled through the servo controller. The servo valve, the constant-pressure output valve and the oil pump are arranged in sequence from the oil inlet of the fine-blanking action execution oil cylinder to an oil tank. According to the electro hydraulic servo system for the high-frequency fine-blanking forming equipment, the defect that the speed fluctuation is large when a fine-blanking machine in a rapid feeding state is switched to be in a working feeding state is mainly overcome; it is indicated by actual test results that the machining efficiency and the stability in the fine blanking process are improved, the blanking frequency can be as high as 70 times / min, and the amplitude is quite low.
Description
technical field [0001] The invention relates to an electro-hydraulic servo system of high-frequency fine-blanking forming equipment. Background technique [0002] Fine blanking technology is an advanced processing technology with high quality, high efficiency, low consumption and wide application range. The fine blanking machine can provide blanking force, counter force and blank holder force at the same time. Therefore, during the blanking process, the plate is always in three The state of compressive stress constitutes the blanking condition in the form of pure shear, which inhibits the tearing during the blanking process and ensures the progress of the plastic deformation process. The parts punched out based on this technology have smooth cross-section, high precision and small burrs. The fine blanking process is divided into three basic processes: fast forward, work forward, and fast return. The fast forward and fast return actions are completed by the fast cylinder, an...
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IPC IPC(8): F15B9/09
Inventor 华林刘艳雄闫丙尧
Owner WUHAN UNIV OF TECH