Design of quick die change system of heavy - duty press has been introduced with principle and component of lifter , pump and control valve of pneumatic and hydraulic , emphasis especially on design and calculation for lifter and pump 摘要介紹了用于大型壓力機的模具快速更換系統(tǒng)的組成及工作原理,舉升器和氣動液壓泵的結構與工作原理,舉升器控制系統(tǒng)的原理等,并重點介紹了舉升器和氣動液壓泵的設計計算。