论述了温度对液压系统中液压油粘度的影响及油液粘度对液压系统工作性能的影响。设计了金属打包液压机油液温度自动控制系统。通过试验研究，获得了液压机最佳工作油液温度为51℃，且系统温控精度高。%The effect of temperature and the working property of the hydraulic system is showed, the oil temperature automatic control system of metal packer hydraulic press is designed. The best oil temperature is confirmed to be 51℃ through experience. The system possesses high control precision.
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