Research On Energy Saving and Performance Enhancement of High-End Hydraulic Press With Controllable Accumulator

Abstract

Hydraulic fineblanking press is a kind of high-end hydraulic metal forming devices and widely applied in automotive and appliance industry. However, it suffers from the defeat of high energy consumption low energy efficiency. To solve the problem, this study proposed a power-matching strategy by using a novel controllable accumulator which can control the precharge pressure, output flow with high precision. Firstly, the energy characteristics and working performance requirements of the large-sized fineblanking press in a working cycle were investigated. Then, the energy consumption mathematic model coupling with the controllable accumulator was built for designing the key parameters of the accumulators. Based on the load characteristic and the energy model, a controlling strategy of the controllable accumulator was proposed to reduce the imbalance degree of the supplied and demanded power and improve working performance by designing working route of the controllable accumulator. Finally, a detailed hydraulic schematic was designed and applied on the 1000 ton hydraulic fineblanking press, which was validated with simulation model. The results show that compared to the traditional system, the energy efficiency of the novel system is improved by 20.35% with lowering the input energy by 169.4 kJ. Besides, the vibration magnitude of the slide block is decreased a lot and the working production efficiency is improved by 10% compared to the traditional system.