在小批量生产产品和设备维修中,经常遇到数量较少的专用平面橡胶密封圈加工,用眼冲冲制内孔或外圆,达不到使用要求(图1)。为此,根据切翩原理和橡胶的可塑性、弹性、硬度,设计制造了空心钻。钻头结构如图2所示。钻头材料以45钢、40Cr钢为宜。钻制少量平面密封圈,刃部可不淬火;生产量较大,刃部应淬火,钻头内控用芯棒 In the small batch production of products and equipment maintenance, often encounter a small number of special plane rubber ring processing, eye punch hole or cylindrical, can not meet the requirements (Figure 1). To this end, according to cut Pina principle and rubber plasticity, flexibility, hardness, design and manufacture of hollow drill. Drill structure shown in Figure 2. Drill material to 45 steel, 40Cr steel is appropriate. Drilling a small amount of plane seals, the blade can be quenched; larger production, the blade should be quenched, drill control with a mandrel