Study on the Influence of Vibration Cutting on Chip Formation Using a Modified quick-stop Device

應用改良式急停機構探討振動切削對於切屑形成影響之研究

陳國亮(Gwo-Lianq Chern)

《中國機械工程學刊》 28卷4期 (2007/08) Pp. 413-420

https://doi.org/10.29979/JCSME.200708.0007

摘要

本文將現有自行研發之刀具急停機構加以改良，結合壓電致動器使其具有振動切削之功能，於車削中能瞬間停止加工動作並取得切屑根部之樣本，以供後續之觀察與分析。結合振動切削與刀具急停機構為一嶄新的嚐試，本文詳細說明了改良機構時之諸多設計考慮因素，並獲得許多清晰且高品質之照片，發現於振動切削中造成較高的剪切角與較薄的切屑，同時減低了切屑與工件介面之加工硬化現象，以及第二剪切區的熔著與黏滯現象。

並列摘要

In this paper, the quick-stop device we had previously developed was modified to produce the function of vibration cutting (VC). A cutoff tool was employed to obtain orthogonal cutting on an engine lathe, imposing the modified device to collect chip-root sample for subsequent examinations and analyses. A piezoelectric actuator was utilized to create the desired vibration on the cutoff tool. Combining quick-stop device with VC is a brand new attempt. Design strategy of the modified device is indicated. The experimental results and photomicrographs of very satisfactory quality are presented. The influence of vibration cutting on chip formation is discussed. Hardness distribution of a chip with built-up edge is investigated. When vibration cutting is applied, it is found that larger shear angles and thinner chips are produced. Besides, strain hardening in the chip-tool interface during chip formation is relieved, and seizure or sticking behavior in the secondary shear zone is diminished noticeably.

並列關鍵字

quick-stop device ； chip formation ； vibration cutting ； built-up edge ； shear angle ； secondary shear zone