Understanding the chip formation mechanisms during machining is an important factor to facilitate the choice of cutting tools and machining parameters. Despite the appearance of new sophisticated methods and advanced equipment, the technique so called quick-Stop Test (QST) remains efficient, less costly, and easier to apply in the investigation of chip formation in cutting process. In present paper a new Quick-Stop Device QSD is designed, numerically simulated, implemented, and tested. The reformed QST technique uses a QSD device which operates on the modified Charpy pendulum. Accordingly, design of new QSD is presented and deeply described, and 2D FE modeling of the new QST, including the application of the appropriate boundary conditions, has been carried out. Moreover, chip formation and morphology for different cutting conditions have been effectively simulated. Subsequently, quick stop cutting operations including metal cutting tests of high alloyed tool steel (AISI D2) using fabricated new QSD are performed. Preliminary results of quick-stop experiment from current investigation prove the effectiveness of the new designed QSD in matter of rigidity, safety, and absence of vibration, while providing a fast set up time and allowing extremely short workpiece-cutting tool separation time and guarantee the generation of chip with its root. The photomicrographs of chip root samples gathered from hard metal cutting experiments including various cutting speeds machining conditions, enables clear observation of segmented chip formation mechanisms, thereby, highly promising the new designed QSD for the purpose of investigation of the different cutting parameters influencing the chip formation and morphology.

了解加工过程中的切屑形成机制是方便刀具和加工参数选择的重要因素。尽管出现了新的复杂方法和先进的设备，所谓的快速停止测试 (QST) 技术仍然高效、成本更低且更易于应用于切削过程中切屑形成的研究。在本文中，设计、数值模拟、实施和测试了一种新的快速停止装置 QSD。改进的 QST 技术使用 QSD 设备，该设备在改进的夏比摆上运行。因此，提出并深入描述了新 QSD 的设计，并进行了新 QST 的二维有限元建模，包括应用适当的边界条件。而且，有效模拟了不同切削条件下的切屑形成和形态。随后，执行快速停止切削操作，包括使用制造的新 QSD 对高合金工具钢 (AISI D2) 进行金属切削试验。当前调查的快速停止实验的初步结果证明了新设计的 QSD 在刚性、安全性和无振动方面的有效性，同时提供了快速的设置时间和极短的工件切削刀具分离时间，并保证了代芯片与其根。从硬质金属切削实验中收集的切屑根部样品的显微照片，包括各种切削速度加工条件，可以清楚地观察分段切屑形成机制，从而，