众多的航天零件,必须在硬质耐热合金上极其准确地、可反复地加工出数以千计的细微小孔。例如,典型的飞机涡轮发动机为了零件的临界冷却,必须加工直径0.06英寸以下的孔约25000个。最近,出现了利用Nd:YAG激光光源的计算机数控自动激光器,它在降低打孔成本方面颇为有效。采用激光打孔方式可取代传统的打孔加工、电化学加工和放电加工。本方式要求采用特殊的激光束调焦技术,以便使激光束的直径远小于欲打的孔径。 A large number of aerospace components, must be extremely precise in the hard heat-resistant alloy, can be repeatedly processed thousands of tiny holes. For example, in a typical aircraft turbine engine for critical cooling of a part, approximately 25,000 holes must be machined below 0.06 inches in diameter. More recently, computer-aided automatic lasers using Nd: YAG laser light sources have emerged that are quite effective in reducing punch costs. Using laser drilling method can replace the traditional drilling, electrochemical machining and electrical discharge machining. This method requires a special laser beam focusing technique so that the diameter of the laser beam is much smaller than the desired aperture.