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随着液压技术的应用和发展,锻压机械采用液力驱动已不限于液压机一类设备,在锻锤中像液压模锻锤亦已采用。液压模锻锤已由纯液压发展到液气驱动,并由有砧座式发展为对击式,从其动向来看,有与小吨位的模锻锤、对击锤并用而发展的趋势。七十年代以来,我国设计研制的几台液压模锻锤,多属液气驱动,液压联动、锤身(或下锤头)微升式者,意在以对击式代替固定砧座式,以下行程小代替上下相等行程,它具有体积小、重量轻、少振动之特点,也便于多模膛模锻操作。为实现液压模锻锤连续地完成其工作循环,并使液压系统的动力元件油泵连续地运转且无高压溢流以达到锤工作的快速性和保证锤上下对击系统的行程比,从而决定了液压模锻锤的液压传动特点——采用闭式液压回路。
With the application and development of hydraulic technology, hydraulic driving of forging machinery has not been limited to a hydraulic equipment, but also used as forging hammer in forging hammer. Hydraulic die forging hammer has been developed from pure hydraulic pressure to liquid-gas driven, and from the anvil-type development for the attack, from its movement point of view, with a small tonnage forging hammer, hammer and the development trend. Since the 1970s, several hydraulic forging hammers designed and developed in our country have been mainly driven by liquid-gas, with hydraulic linkage, and those with vertical (or under-hammer) lifts. They are intended to replace the fixed anvil type with the hammer type, The following trip to replace the upper and lower equal stroke is small, it has small size, light weight, less vibration characteristics, but also facilitate multi-die forging operation. In order to achieve the hydraulic die forging hammer to complete its work cycle, and make the hydraulic system of power components pump continuous operation and no high-pressure overflow in order to achieve the rapidity of hammer work and ensure that the hammer up and down on the system of stroke ratio, which determines the Hydraulic die forging hammer hydraulic transmission features - the use of closed hydraulic circuit.