公开(公告)号：US09383742B2

公开(公告)日：2016-07-05

申请号：US13791053

申请日：2013-03-08

申请人： PRATT & WHITNEY CANADA CORP.

发明人： Yuwen Li ,  Amr Elfizy

IPC分类号： G05B9/02 ,  G05B19/408 ,  G05B19/404

CPC分类号： G05B19/4086 ,  G05B19/404 ,  G05B2219/33257 ,  G05B2219/33271 ,  G05B2219/50296

摘要： A system and method for error compensation in positioning a complex-shaped gas turbine engine part during manufacturing thereof with a machine. Theoretical measurements for a plurality of control points on the part are first retrieved. Actual measurements for the control points are then acquired in a coordinate system of the machine. If an error between the actual and theoretical measurements is beyond a tolerance, a transformation matrix is computed. The transformation matrix represents a transformation to be applied to the coordinate system to adjust a pose thereof for compensating the error. The transformation matrix may be computed and applied to the coordinate system iteratively until the actual measurements are brought within tolerance. A machining program may then be generated for manufacturing the part accordingly.

摘要翻译： 一种用于在用机器制造复杂形状的燃气涡轮发动机部件时对误差补偿进行定位的系统和方法。 首先检索部件上的多个控制点的理论测量。 然后在机器的坐标系中获取控制点的实际测量值。 如果实际和理论测量之间的误差超出公差，则计算变换矩阵。 变换矩阵表示要应用于坐标系以调整其姿势以用于补偿误差的变换。 可以计算转换矩阵并迭代地应用于坐标系，直到将实际测量值置于公差范围内。 然后可以产生加工程序以相应地制造该部件。

公开(公告)号：US09597759B2

公开(公告)日：2017-03-21

申请号：US14228589

申请日：2014-03-28

申请人： Pratt & Whitney Canada Corp.

发明人： Yuwen Li ,  Amr Elfizy

IPC分类号： B23B31/32 ,  B23Q3/18

CPC分类号： B23B31/32 ,  B23B2215/76 ,  B23B2260/032 ,  B23Q3/183 ,  Y10T29/49998 ,  Y10T279/1016

摘要： A positioning assembly for positioning a rotary part to be machined includes a machining fixture and a positioning device having an elastically-deformable diaphragm concentrically mounted to the fixture and defining an annular loading zone which receives an axial force substantially parallel with a center axis of the fixture. The positioning device has circumferentially-spaced engaging segments, fixed to the diaphragm and extending away therefrom, which have contact members that are displaced radially to frictionally engage the rotary part when the axial force is applied to the loading zone of the diaphragm.

公开(公告)号：US10751808B2

公开(公告)日：2020-08-25

申请号：US15414795

申请日：2017-01-25

申请人： PRATT & WHITNEY CANADA CORP.

发明人： Yuwen Li ,  Amr Elfizy

IPC分类号： B23B31/32 ,  B23Q3/18

摘要： A method for positioning a rotary part on a machining fixture adapted to hold the rotary part for a machining operation is described. The machining fixture has a center axis and a diaphragm with engaging segments affixed thereto and extending away therefrom. The method includes mounting the rotary part on the machining fixture concentrically about the center axis and adjacent to the engaging segments, and then applying an axial force in a direction substantially parallel to the center axis against the diaphragm. This elastically deforms the diaphragm and radially displaces the contact members of the engaging segments into frictional engagement with a circumferential surface of the rotary part.