Application and analysis of optimum design of die for hydraulic pipe shrinkage machine 液压缩管机模具优化设计的应用与分析
The Shrinkage Compensation Coefficient y is proposed for quantitatively estimating the effectiveness of die expansion at early age compensating the shrinkage at later stage. 提出以收缩补偿系数γ来定量描述补偿收缩混凝土早期膨胀对后期收缩的有效补偿能力。
The theoretical analysis and calculation of the die swell and shrinkage for extruded tread are carried out. 在总结前人对挤出膨胀和收缩研究的基础上,对胎面挤出膨胀比和收缩率进行了一些理论分析和计算。
Die swell and shrinkage of extruded tread 胎面挤出膨胀与收缩的研究
The shrinkage defects in Mg alloy die casting were examined. Occurrence of surface and internal fissure was attributed to delamination filling during the ejection of diecasting with the asynchronism of the solidification shrinkage. 对音箱面板镁合金压铸件出现的收缩缺陷进行了检测分析,认为表面裂痕和内部裂纹产生的原因是由于压铸喷射填充状态下的分层充填以及凝固收缩的不同时性所引起的;
Effect of technology and equipment on die swell and shrinkage during extrusion 影响挤出膨胀因数和收缩率的工艺及设备因素
The effect of the technology and equipment, such as the structure and dimension of die plates, the extrusion conditions and so on, on the die swell and shrinkage of tread extrudate was described. 阐明影响挤出胎面膨胀和收缩的主要工艺及设备因素是口型板的结构和尺寸、挤出条件以及设备。
But the loading wheel produced by liquid die forging has a few defects such as shrinkage cavity or porosity and hot crack. 但是通过挤压铸造生产负重轮容易出现缩孔缩松和热裂缺陷。