根据扭矩过载是造成钻头折断的主要原因的理论,大连组合机床研究所最近研制出一种适用于φ2左右的深孔钻削过扭矩保护装置。本文介绍这种装置的基本原理、结构以及试验使用情况。图2幅。 According to the theory that torque overload is the main reason for bit breakage, Dalian Composite Machine Tool Research Institute recently developed a deep hole drilling torque protection device suitable for φ2. This article describes the basic principles of this device, structure and use of the test. Figure 2.