• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers. Part L, Journal of Materials: Design and Application >Design and analysis of epoxy granite vertical machining centre base for improved static and dynamic characteristics
【24h】

Design and analysis of epoxy granite vertical machining centre base for improved static and dynamic characteristics

机译：改善静态和动态特性的环氧花岗岩立式加工中心基座的设计与分析

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The structural vibration in conventional machine tools which are generally made of cast iron may lead to poor surface finish of the machined components. This has led to the investigations on alternative materials for machine tool structures such as concrete, polymer concrete and epoxy granite which have higher damping properties but lesser Young's modulus. However, higher static stiffness with higher damping is essential for improving the static and dynamic characteristics of machine tool structures. Hence, this work focuses on replacing the vertical machining centre base made of cast iron with steel reinforced epoxy granite to improve the structural static stiffness. A finite element model of the above base is developed and validated against the experimental data obtained using modal analysis. The validated numerical approach is applied for investigating the seven progressive design configurations of base reinforced with steel. It is found that the epoxy granite base of Design configuration-7 with L-channels has significantly reduced the deformation by 56 and 36% considering milling and drilling operations, respectively, in comparison to cast iron base. Further, the natural frequencies of the above configuration are higher in all the modes (by more than 50%) under consideration than those of the existing cast iron structure. Therefore, the proposed configuration of base is a viable alternative for the existing base in order to achieve higher structural damping. The novelty of the present work is the design of epoxy granite vertical machining centre base using steel reinforcements to improve structural rigidity with ease of manufacturing.
机译：在通常由铸铁制成的常规机床中，结构振动会导致加工部件的表面光洁度差。这导致了对用于机床结构的替代材料的研究，例如混凝土，聚合物混凝土和环氧花岗岩，这些材料具有较高的阻尼特性，但杨氏模量较小。但是，较高的静态刚度和较高的阻尼对于改善机床结构的静态和动态特性至关重要。因此，这项工作的重点是用钢增强的环氧花岗岩代替铸铁制成的立式加工中心底座，以提高结构的静态刚度。建立了上述基础的有限元模型，并针对使用模态分析获得的实验数据进行了验证。经验证的数值方法可用于研究钢加固基础的七个渐进设计构型。结果发现，与铸铁基体相比，设计配置7的带有L通道的环氧花岗岩基体在铣削和钻孔操作下分别显着减少了56％和36％的变形。此外，在所考虑的所有模式下，上述构造的固有频率都比现有铸铁结构的固有频率高（超过50％）。因此，建议的底座配置是现有底座的可行替代方案，以实现更高的结构阻尼。本工作的新颖之处在于采用钢增强材料的环氧花岗岩立式加工中心基座的设计，以提高结构刚度并易于制造。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号