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Abstract：
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The development trend of CNC punch press is to use hydraulic power system instead of mechanical power system. In this paper, a new hydraulic power system developed by author recently is introduced. The rapid advance and return movement of the hydraulic cylinder is achieved by using rapid on-off valves as the forerunner valves to control the massive flow, so that the CNC press can drive the slider and the mould rapidly with great power. After being improved, it runs well with simple structure and low cost. It is as good as that of the imported machine and may be used as a substitute.
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AuthorIntro：
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Reference：
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[1]阳林,潘晓涛,黄诗君.国内外的数控压力机发展及我国的策略[J].广东机械学院学报,1995,(3):9195.
[2]李季,黄树槐.加速我国液压数控回转头压力机的研制[J].锻压机械,1996,(3):911.
[3]丁小艺,孙友松.数控回转头压力机及其液压驱动系统[J].制造业自动化,2003,(4):4850.
[4]邱从波,熊晓红,陈柏金,黄树槐.J92-10型回转台数控压力机的微机控制系统[J].锻压技术,2002,(4):4850.
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