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1. 发明授权

US10252382B2 Method of machining surfaces of rotor disc and grinding machine therefor 有权
公开(公告)号：US10252382B2
公开(公告)日：2019-04-09
申请号：US15175369
申请日：2016-06-07
申请人： Pratt & Whitney Canada Corp.
发明人： Amr Elfizy , Lafleche Gagnon , Sylvain Jette
IPC分类号： B23P15/04 , B24B19/26 , B24B5/14 , B24B5/04 , B24B5/02 , B24B19/00 , B24B27/00 , B24B41/00 , B24D5/02 , B24D7/02 , B24D7/18
摘要： A grinding machine for finishing turned surfaces of a rotor disc for a gas turbine engine, including a retaining mechanism for retaining the rotor disc and rotatable about a rotational axis corresponding to a central axis of the rotor disc, a spindle engaged to a grinding wheel and rotatable about a rotational axis corresponding to a central axis of the grinding wheel, the grinding wheel having an outer super abrasive surface, a translating mechanism engaged to at least one of the retaining mechanism and the spindle and actuable to provide a relative translational motion between the retaining mechanism and the spindle along three perpendicular axes, and a pivoting mechanism engaged to one of the retaining mechanism and the spindle and actuable to provide a pivoting motion of the rotational axis of one of the retaining mechanism and the spindle around a pivot axis perpendicular thereto.

2. 发明授权

US09383742B2 System and method for positioning error compensation during manufacturing of complex-shaped gas turbine engine parts 有权
标题翻译：在复杂形状的燃气涡轮发动机零件制造过程中定位误差补偿的系统和方法
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。

3. 发明授权

US09329592B2 Methods and systems for calculation of feedrate 有权
标题翻译：计算进给率的方法和系统
公开(公告)号：US09329592B2
公开(公告)日：2016-05-03
申请号：US13686193
申请日：2012-11-27
申请人： Pratt & Whitney Canada Corp.
发明人： Vincent Thomasset-Laperriere , Amr Elfizy
IPC分类号： G05B19/19 , G05B19/416
CPC分类号： G05B19/4166 , G05B2219/43156
摘要： Methods and systems for calculating a feedrate for programming a multi-axis machining tool. For at least one control block in a defined machining path: a displacement of a defined machine control point from a previous control block to a current control block is determined; a displacement of a defined feedrate control point from the previous control block to the current control block is determined; a compensation ratio is calculated as a ratio between the displacement of the defined machine control point and the displacement of the defined feedrate control point; and a feedrate for the machine control point is calculated by applying the compensation ratio to a desired feedrate. The calculated federate is used in a control block of a multi-axis machining tool.
摘要翻译：用于计算多轴加工工具编程进给率的方法和系统。对于在确定的加工路径中的至少一个控制块：确定定义的机器控制点从先前控制块到当前控制块的位移; 确定定义的进给速度控制点从先前控制块到当前控制块的位移; 补偿比被计算为所定义的机器控制点的位移与限定的进给速度控制点的位移之间的比率; 并且通过将补偿比应用到期望的进给速度来计算机器控制点的进给速度。计算的联合体用于多轴加工工具的控制块。

4. 发明授权

US08821212B2 Active coolant flow control for machining processes 有权
标题翻译：用于加工过程的主动冷却液流量控制
公开(公告)号：US08821212B2
公开(公告)日：2014-09-02
申请号：US14045847
申请日：2013-10-04
申请人： Pratt & Whitney Canada Corp.
发明人： James Leishman , Amr Elfizy
IPC分类号： B24B1/00 , B24B49/00 , B24B51/00
CPC分类号： B24B55/03 , B23Q11/1038 , B24B1/00
摘要： A method for operating a machining tool, comprising: setting a flow rate and a pressure of a flow of coolant to a target flow rate and a pressure target, respectively, the coolant flow being provided to the machining tool; machining a work-piece using the machining tool; measuring the flow rate and the pressure of the flow of coolant; and detecting an anomaly with respect to the coolant flow; and taking a corrective action depending on the type of the detected anomaly.
摘要翻译：一种用于操作加工工具的方法，包括：分别将冷却剂流的流量和压力设定为目标流量和压力目标，所述冷却剂流被提供给所述加工工具; 使用加工工具加工工件; 测量流量和冷却液流量的压力; 并且检测相对于冷却剂流动的异常; 并根据检测到的异常的类型采取纠正措施。

5. 发明授权

US09796066B2 Grinding wheel and method 有权
公开(公告)号：US09796066B2
公开(公告)日：2017-10-24
申请号：US15045406
申请日：2016-02-17
申请人： Pratt & Whitney Canada Corp.
发明人： Amr Elfizy , François Perron
IPC分类号： B24D5/10 , B23Q11/12 , B24B55/02 , B24D7/10
CPC分类号： B24B55/02 , B23Q11/12 , B24D5/10 , B24D7/10
摘要： A method for distributing a coolant to a grinding site of a grinding wheel, including rotating the grinding wheel, injecting the coolant in an inlet of the grinding wheel disposed proximate to an axis of rotation of the grinding wheel, moving the coolant fluid from the inlet along a plurality of internal grooves of the grinding wheel outwardly towards a plurality of outlets, and expelling the coolant outwardly from the plurality of outlets at an angle of at most 15 degrees with respect to a tangent to a circumference of the grinding wheel at the outlet.

6. 发明授权

US09597759B2 Positioning assembly and method 有权
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.

7. 发明授权

US09302369B2 Grinding wheel and method 有权
标题翻译：砂轮和方法
公开(公告)号：US09302369B2
公开(公告)日：2016-04-05
申请号：US14159121
申请日：2014-01-20
申请人： Pratt & Whitney Canada Corp.
发明人： Amr Elfizy , François Perron
IPC分类号： B24D5/10 , B23Q11/12 , B24B55/02 , B24D7/10
CPC分类号： B24B55/02 , B23Q11/12 , B24D5/10 , B24D7/10
摘要： A grinding wheel including an impeller structure for circulating coolant within the wheel defining a plurality of grooves. An angle between a second wall of each groove and a tangent to the outer circumference adjacent the groove outlet is defined based on the desired coolant flow rate, the predetermined wheel rotational speed, the radius of the outer circumference of the impeller structure, the combined surface area of the groove outlets, and a desired angle of exit of the coolant being at most 15 degrees. Also, a wheel is disclosed where the angle of the second wall of each groove is defined based on the desired coolant flow rate, the combined surface area of the groove outlets, the tangential speed of the wheel, and a value of n being at least 0.9 and less than 1. A method for distributing a coolant to a grinding site is also discussed.
摘要翻译：一种砂轮，其包括用于使限定多个凹槽的轮内的冷却剂循环的叶轮结构。基于期望的冷却剂流速，预定的轮转速度，叶轮结构的外周半径，组合表面的尺寸来确定每个槽的第二壁与邻近槽出口的外周的切线之间的角度凹槽出口的面积，以及所需冷却剂的出口角度至多为15度。此外，公开了一种车轮，其中每个槽的第二壁的角度基于期望的冷却剂流率，槽出口的组合表面积，车轮的切向速度和n的值被定义为至少 0.9和小于1.还讨论了将冷却剂分配到研磨部位的方法。

8. 发明授权

US09296053B2 Apparatus for providing firtree slots 有权
标题翻译：用于提供空调槽的装置
公开(公告)号：US09296053B2
公开(公告)日：2016-03-29
申请号：US14045850
申请日：2013-10-04
申请人： Pratt & Whitney Canada Corp.
发明人： Sylvian Jette , Yannick Dupont , Amr Elfizy
IPC分类号： B23C3/36 , B24B19/02 , B24D7/18 , F01D5/30
CPC分类号： B23C3/36 , B23C2220/366 , B24B19/02 , B24D7/18 , F01D5/3007 , F05D2230/10 , Y10T29/49316 , Y10T29/4932 , Y10T29/49995 , Y10T29/49996 , Y10T408/905 , Y10T409/303752 , Y10T409/303808 , Y10T409/304424
摘要： An apparatus for forming a firtree slot in a disc of a bladed rotor assembly for a gas turbine engine may include a tip portion having the shape of the profile of one side of the firtree slot to be formed but smaller than the profile of the complete firtree slot so that the tool will only engage one side of the firtree slot.
摘要翻译：用于在用于燃气涡轮发动机的叶片式转子组件的盘中形成空隙槽的装置可以包括具有要形成的空隙槽的一侧的轮廓形状但小于完整胎圈的轮廓的尖端部分插槽，以便该工具只能接合firtree插槽的一侧。

9. 发明申请

US20150273640A1 POSITIONING ASSEMBLY AND METHOD 有权
标题翻译：定位装配和方法
公开(公告)号：US20150273640A1
公开(公告)日：2015-10-01
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： B23Q3/18 , B23B31/42 , B23B31/32
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.
摘要翻译：用于定位要加工的旋转部件的定位组件包括加工夹具和定位装置，该定位装置具有同心安装到固定装置的弹性可变形隔膜，并且限定环形加载区域，该环形加载区域接收基本上平行于夹具的中心轴线的轴向力。定位装置具有周向间隔的接合段，固定到隔膜并从其延伸，当轴向力施加到隔膜的装载区时，接触构件具有径向位移以摩擦接合旋转部分的接触构件。

10. 发明授权

US10751808B2 Positioning assembly and method 有权
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.

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