Development of in-situ observation system of dynamic contact interface between dies and materials during microforming operation
Development of in-situ observation system of dynamic contact interface between dies and materials during microforming operation
复制标题
DOI：
10.1051/matecconf/20152109008
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Tetsuhide Shimizu;T. Kakegawa;M. Yang
中科院分区：
文献类型：
--
作者：
Tetsuhide Shimizu;T. Kakegawa;M. Yang
类金刚石膜具有低摩擦和高化学稳定性，具有良好的摩擦学性能，因此本文报道了类金刚石膜在微成形工艺中的应用。然而，由于其内部残余应力高，在恶劣的摩擦学条件下具有低粘附强度和高磨损率的膜性能仍然是一个技术问题。然而，由于在成形过程中无法观察到接触状态的动态变化，因此很难识别DLC涂层微成形模具刀具寿命的来源和影响因素。因此，微成形过程中接触状态下DLC膜的合适性能尚未明确。为了观察微成形过程中接触状态的动态变化，本研究开发了一种新型微成形模具组件，该组件安装了硅玻璃模具和高速摄像机的原位观察系统。利用该系统，成功地展示了DLC薄膜在渐进微弯曲过程中的动态分层行为。讨论了影响DLC涂层微模具耐久性的因素。
Application of diamond like carbon (DLC) films are reported in several microforming processes, in view of its great tribological performance owe to the low friction and the high chemical stability. However, due to its high internal residual stress, the film properties with the low adhesion strength and the high wear rate under severe tribological conditions are still remain as technical issues. However, since the dynamic variation of the contact state cannot be observed during the forming operation, it is difficult to recognize the origin and the influential tribological factors of tool life for DLC coated microforming die. Therefore, the appropriate DLC film properties for the contact state in microforming operation have not been clarified. To observe the dynamic variation of the contact state during the microforming operation, present study developed a novel microforming die assembly installed the in-situ observation system with silica glass die and high speed recording camera. By using this system, the dynamic delamination behaviour of DLC films during the progressive micro-bending process was successfully demonstrated. The influential factors for the durability of DLC coated microdies were discussed.