公开(公告)号：US20100158627A1

公开(公告)日：2010-06-24

申请号：US12341455

申请日：2008-12-22

申请人： AFZAAL MIR

发明人： AFZAAL MIR

IPC分类号： B23B51/02

CPC分类号： B23B51/02 ,  B23B2215/04 ,  B23B2226/27 ,  B23B2226/61 ,  B23B2228/36 ,  B23B2251/04 ,  B23B2251/082 ,  B23B2251/14 ,  B23B2251/44

摘要： A drill bit having features rendering it particularly effective in cutting holes in carboresin laminates of the type used in the aircraft industry. A pair of diametrically opposite lands slope radially inward at the working end of the bit to a pair of cutting edges disposed at an obtuse angle to one another and forming an efficient cutting tip. Notches with sloping ramps adjacent the cutting edges efficiently convey cut material to adjacent flutes. The lands curve radially inward between their full diameter portion and their cutting tips and the junction of the curved portion and the constant diameter portion of the lands is machined to provide a more gradual transition.

摘要翻译： 具有特征的钻头，其特别有效地用于在飞机工业中使用的类型的碳纤维层压板中切割孔。 一对直径相对的平台在钻头的工作端处径向向内倾斜到以彼此钝角设置的一对切削刃，并形成有效的切削尖端。 具有与切削刃相邻的倾斜坡道的凹口有效地将切割材料传送到相邻的凹槽。 在它们的全直径部分和它们的切割尖端之间径向向内弯曲的区域被加工，并且加工了弯曲部分和平坦直径部分的连接点以提供更渐进的过渡。