PAGE\*MERGEFORMAT50摘要精锻机是一种快速精密锻压设备，由几个对称锤头对金属坯料进行高频率锻打，锻压时坯料由操作机的夹头送入锻压箱进行往复锻压。这类机器多用程序控制﹑数字控制或微处理控制系统自动操作﹐是一种生產效率高的短冲程压力机。世界上有许多国家在冶金、机械制造、国防工业上采用了精锻机来生产合金结构钢、高强度合金钢、钛合金和难变形合金的产品。我国精锻机的研制进程十分缓慢，至今为止只仿制了2台中型精锻机。一台是由大连钢厂牵头制造的一台340t精锻机，另一台是由大连精工锻压高新技术公司提供技术，中国一重制造的400t精锻机，投产后已使用5年。其设备稳定性精度等方面与国外精锻机有很大差距。因此加快国内精锻机的进一步开发研究迫在眉睫。本文主要对精锻机进行了一个总体介绍和对定心夹钳结构以及液压控制系统进行设计计算。关键词：精锻机，定心夹钳，液压系统ABSTRACTPrecisionForgingMachineisafastprecisionforgingequipmentonwhichmouldforgingblankisthrowedintoforgingpressingboxandforgedandpressedreciprocatinglywithhighfrequencybyseveralsymmetricalhammerhead.Thestylemachineisakindofhighproductionefficientshortstrokepress,whichisoperatedautomaticallywithproceduralcontrol,digitalcontrolormicroprocesscontrolsystem.PrecisionForgingMachineisusedinmanufacturingofalloystructuralsteels,highstrengthalloysteel,titaniumalloysanddifficult-to-formalloysinmetallurgy,machinemanufactureandmilitaryindustryinmanycountriesontheworld.PrecisionForgingMachinedevolpstardilyinchina,sofartwomedium-sizedPrecisionForgingMachineeshavebeenimitated.oneisa340tPrecisionForgingMachinemadeleadedwithDaliansteelfactory,theotherisa400tPrecisionForgingMachinemanufacturedbyCFHIwiththeaideofthetechniqueofDalianSeikoforginghigh-techcompanies.ThePrecisionForgingMachinehasbeenputintoproductionfor5years,comparedwithforeignequipment'sstabilityandprecision,ithaveprodigiousdifferences.Therefore,themendingininternalPrecisionForgingMachine'sfurtherexploitationresearchisstaredintheface.ThispapermainlyonprecisionforgingmachinewasageneralintroductionandCentringclampstructureandhydraulicsystemdesignandcalculation.Keywords：PrecisionForgingMachine,Centeringtongs，hydraulicsystem目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc325548081"摘要PAGEREF_Toc325548081\h1HYPERLINK\l"_Toc325548082"ABSTRACTPAGEREF_Toc325548082\h2HYPERLINK\l"_Toc325548083"·第一章绪论PAGEREF_Toc325548083\h5HYPERLINK\l"_Toc325548084"1-1锻压机发展过程PAGEREF_Toc325548084\h5HYPERLINK\l"_Toc325548085"1-1-1蒸汽