公开(公告)号：US06541733B1

公开(公告)日：2003-04-01

申请号：US09771856

申请日：2001-01-29

申请人： Seetharamaiah Mannava ,  Jeffrey H. Nussbaum ,  Abraham S. Assa ,  Andrea G. M. Cox ,  James R. Zisson ,  Albert E. McDaniel ,  William D. Cowie

发明人： Seetharamaiah Mannava ,  Jeffrey H. Nussbaum ,  Abraham S. Assa ,  Andrea G. M. Cox ,  James R. Zisson ,  Albert E. McDaniel ,  William D. Cowie

IPC分类号： B23K2600

CPC分类号： F01D5/286 ,  C21D10/005 ,  Y02T50/673

摘要： A method for laser shock peening rotor blade leading and trailing edges of gas turbine engine integrally bladed rotors and disks that are not blocked by other rows of blades. The method includes continuously firing a stationary laser beam, which repeatable pulses between relatively constant periods, along at least a portion of leading or trailing edges of the blade, with the laser beam aimed at an oblique angle with respect to a surface of the edge such that laser pulses form overlapping elliptical shaped laser spots. In the exemplary embodiment of the invention, the elliptical shaped laser spots have an overlap of about 50% and are on the order of 11.7 mm by 4 mm in diameter. Another method is for laser shock peening rotor blade leading and trailing edges of gas turbine engine integrally bladed rotors and disks that are blocked by other rows of blades. The method includes continuously firing the stationary laser beam, which repeatable pulses between relatively constant periods, along at least a portion of leading or trailing edges of the blade, with the laser beam compoundly angled such that it is aimed at a first oblique angle with respect to a surface of the edge and at a second oblique angle with respect to an axis about which the rotor is circumscribed. Laser pulses form the elliptical shaped laser spots that are angled from the leading edge radially inwardly towards the axis. In the exemplary embodiment, the elliptical shaped laser spots have an overlap of about 50%.

摘要翻译： 一种用于激光冲击喷丸的转子叶片的前缘和后缘的燃气涡轮发动机整体叶片的转子和盘，不被其他行的叶片阻挡。 该方法包括沿着刀片的前缘或后缘的至少一部分连续射出固定的激光束，该固定激光束是相对恒定周期之间的可重复脉冲，其中激光束相对于边缘表面倾斜倾斜角， 该激光脉冲形成重叠的椭圆形激光点。 在本发明的示例性实施例中，椭圆形激光光斑具有约50％的重叠，并且在直径上为11.7mm×4mm。 另一种方法是用于激光冲击硬化转子叶片的前缘和后缘的燃气涡轮发动机整体叶片转子和盘，被其他行的叶片阻挡。 该方法包括沿着刀片的前缘或后缘的至少一部分连续点燃相对恒定周期之间的可重复脉冲的固定激光束，其中激光束复合成角度，使得其相对于第一倾斜角度瞄准 到边缘的表面并且相对于绕转子限定的轴线以第二倾斜角度。 激光脉冲形成从前缘径向向内朝向轴线成角度的椭圆形激光点。 在示例性实施例中，椭圆形激光点具有约50％的重叠。