摘要：液压虎钳的运动是一种往复直线运动的方式，它对调速、运动平稳性、换向精度、换向频率都有较高的要求，因广泛采用液压传动。液压虎钳是一种用于精密加工机床的辅助加工设备，对液压系统有着较高的要求。液压技术作为一门新兴应用学科，虽然历史较短，发展的速度却非常惊人。液压设备能传递很大的力或力矩，单位功率重量轻，结构尺寸小，在同等功率下，其重量的尺寸仅为直流电机的10%~20%左右；反应速度快、准、稳；又能在大范围内方便地实现无级变速；易实现功率放大；易进行过载保护；能自动润滑，寿命长，制造成本较低。因此，世界各国均已广泛地应用在锻压机械、工程机械、机床工业、汽车工业、冶金工业、农业机械、船舶交通、铁道车辆和飞机、坦克、导弹、火箭、雷达等国防工业中。

    液压传动设备一般由四大元件组成，即动力元件——液压泵；执行元件——液压缸和液压马达；控制元件——各种液压阀；辅助元件——油箱、蓄能器等。     液压阀的功用是控制液压传动系统的油流方向，压力和流量；实现执行元件的设计动作以控制、实施整个液压系统及设备的全部工作功能。

关键词：液压虎钳，液压传动，机械，功能

Abstract：Abstract: the movement of the hydraulic vice is a straight reciprocating motion, it has higher speed, smooth movement, reversing precision and switching frequency requirements, due to the extensive use of hydraulic transmission. Hydraulic vise is used for auxiliary processing equipment of precision machines, there is a high requirement of the hydraulic system. The application of hydraulic technology as an emerging discipline, although a relatively short history, the speed of development is very alarming. Hydraulic equipment can transmit great force or torque and power unit weight is light, small structure size, under the same power, the size of the weight only about 10% to 20% of DC motor; fast reaction speed, accurate and stable, and can in a large range conveniently realize the stepless speed change; easy to realize power amplifier; easy to overload protection; can automatic lubrication, long service life and low manufacturing cost. Therefore, all the countries in the world have widely application in the defense industry, forging machinery, engineering machinery, machine tool industry, automobile industry, metallurgy industry, agricultural machinery, vessel traffic, railway vehicles and aircraft, tanks, missiles, rockets and radar.
    Hydraulic transmission equipment generally consists of four components, namely, power components, hydraulic pump, actuator, hydraulic cylinders and hydraulic motors, control components, the various hydraulic valves; auxiliary components, oil tank, the accumulator. The hydraulic valve function is to control the hydraulic system oil flow direction, pressure and flow; all the work function is designed to realize the action components to control, implementation of the whole hydraulic system and equipment.
Keywords: Hydraulic vise, hydraulic transmission, mechanical function
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