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公开(公告)号：US20230191658A1
公开(公告)日：2023-06-22
申请号：US17554748
申请日：2021-12-17
发明人： Zhigang Wang , John D. Riehl , Robin H. Fernandez , Andrzej E. Kuczek , Gajawalli V. Srinivasan
CPC分类号： B28B11/0881 , B28B13/0275 , B28B17/0081 , B28B2013/0265
摘要： A method is provided for machining a workpiece. During this machining method, an aperture is formed in the workpiece using a machining system. The machining system includes an ultrasonic machining device, a slurry delivery device and a controller. The forming of the aperture includes delivering a slurry to an interface between the ultrasonic machining device and the workpiece using the slurry delivery device, and transmitting ultrasonic vibrations into the slurry using the ultrasonic machining device. A feedback parameter is monitored during the forming of the aperture using the controller. A slurry delivery parameter for the slurry delivery device is adjusted during the forming of the aperture based on the feedback parameter using the controller.
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公开(公告)号：US20230265763A1
公开(公告)日：2023-08-24
申请号：US17675543
申请日：2022-02-18
IPC分类号： F01D11/08 , F01D25/00 , B28B1/30 , B28B11/04 , B28B11/12 , C04B35/83 , C04B35/628 , C04B41/45 , C04B41/81
CPC分类号： F01D11/08 , F01D25/005 , B28B1/30 , B28B11/04 , B28B11/12 , C04B35/83 , C04B35/62873 , C04B35/62868 , C04B35/62863 , C04B35/62892 , C04B35/62884 , C04B41/4578 , C04B41/81 , F05D2220/32 , F05D2230/20 , F05D2240/55 , C04B2235/5248 , C04B2235/5256 , C04B2235/422 , C04B2235/386 , C04B2235/3826 , C04B2235/612 , C04B2235/614
摘要： A method of forming a ceramic matrix composite component according to an exemplary embodiment of this disclosure, among other possible things includes laying up plies of ceramic reinforcement material with sacrificial plies to form a preform, infiltrating the preform with a ceramic matrix material, and machining away the sacrificial plies to reveal a surface profile of the ceramic matrix composite component. A preform for a ceramic matrix composite component is also disclosed.
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公开(公告)号：US20230193772A1
公开(公告)日：2023-06-22
申请号：US17557224
申请日：2021-12-21
发明人： Zhigang Wang , John D. Riehl , Andrew J. Lazur , Robin H. Fernandez , Paul F. Croteau , Gajawalli V. Srinivasan , Ashley A. Smith
IPC分类号： F01D9/06 , B23K26/382 , B23K26/146 , B23B35/00 , G06F30/20
CPC分类号： F01D9/065 , B23K26/389 , B23K26/146 , B23B35/00 , G06F30/20 , F05D2220/32 , F05D2230/13 , B23K2103/52
摘要： A method of machining cooling holes includes providing a workpiece in which a cooling hole is to be formed. The cooling hole, once formed, defines distinct first and second sections. The workpiece is secured in a fixture that is mounted in a first machine. In the first machine, a laser is used to drill a through-hole in a wall of the workpiece. The through-hole is spatially common to the first and second sections of the cooling hole. After drilling the through-hole, the fixture with the workpiece secured therein is removed from the first machine and mounted in a second machine. In the second machine, ultrasonic machining is used to expand a portion of the through-hole to form the second section. An abrasive slurry used in the process is drained through the through-hole during the ultrasonic machining.
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公开(公告)号：US20220090509A1
公开(公告)日：2022-03-24
申请号：US17543799
申请日：2021-12-07
发明人： Robin H. Fernandez
摘要： A seal assembly for a gas turbine engine includes a seal including a main body extending circumferentially between opposed mate faces. The main body has a sealing portion and an engagement portion extending outwardly from sealing portion along at least one of the mate faces. The main body has a core including one or more core plies arranged to establish an internal cavity. An overwrap has one or more overwrap plies arranged to follow a perimeter of the one or more core plies to establish the engagement portion and the sealing portion. A platform insert extends between portions of the core and the overwrap to establish the sealing portion. A method of fabricating a seal for a gas turbine engine is also disclosed.
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公开(公告)号：US12103136B2
公开(公告)日：2024-10-01
申请号：US17406536
申请日：2021-08-19
CPC分类号： B24C1/045 , B24C7/0007
摘要： A method of machining includes mounting a component in a drilling machine. The component has a target region where the hole is to be drilled. The component and a jet head are situated relative to each other in a drilling arrangement in which the target region is at a first position that is vertically equal to or vertically above a second position at which the jet head is located. A liquid stream is jetted from the jet head and contains either abrasive particles or a laser beam. The stream impinges the target region, and the abrasive particles or the laser beam cause removal of material from the component to form the hole. The liquid stream rebounds off of the component as back-splash. The drilling arrangement causes gravitational draining of the back-splash from the target region to reduce interference between the back-splash and the liquid stream.
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公开(公告)号：US20240246193A1
公开(公告)日：2024-07-25
申请号：US18099491
申请日：2023-01-20
发明人： Zhigang Wang , Andrzej E. Kuczek , Gajawalli V. Srinivasan , Robin H. Fernandez , John D. Riehl , Alan C. Barron , Ahmed Abdillahi Abdi , Jason Nelson , Andrew Joseph Lazur
CPC分类号： B24B41/002 , B24B1/04
摘要： A tool for ultrasonic impact grinding apparatus driven to vibrate along a longitudinal axis at an applied operating frequency includes a tool body disposed on the longitudinal axis, a first tip extending from an output end of the tool body, and a second tip extending in parallel to the first tip from the output end of the tool body. The first tip has a first length. The second tip has a second length greater than the first length. A mass of the first and second tip is substantially balanced across the output end of the tool body and with respect to the longitudinal axis.
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公开(公告)号：US20230192560A1
公开(公告)日：2023-06-22
申请号：US18082770
申请日：2022-12-16
IPC分类号： C04B35/80 , F26B5/06 , D06M23/00 , D06M13/248 , D06M13/432 , C04B35/626 , C04B35/638
CPC分类号： C04B35/80 , C04B35/638 , C04B35/62655 , C04B35/62675 , D06M13/248 , D06M13/432 , D06M23/00 , F26B5/06 , D06M2200/00
摘要： A method of spreading fiber tows includes assembling a fibrous composite from a plurality of tows, applying an aqueous solution to the fibrous composite, freezing the fibrous composite after applying the aqueous solution, freeze drying the fibrous composite to remove water from the fibrous composite, and heating the fibrous composite after freeze drying to remove a cryoprotectant from the fibrous composite. The aqueous solution comprises water and the cryoprotectant and freezing the fibrous composite spreads filaments within the plurality of fiber tows.
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公开(公告)号：US20230158629A1
公开(公告)日：2023-05-25
申请号：US17988879
申请日：2022-11-17
发明人： Zhigang Wang , John D. Riehl , Robin H. Fernandez , Andrzej Ernest Kuczek , Gajawalli V. Srinivasan
IPC分类号： B24B7/22
CPC分类号： B24B7/22
摘要： A method for machining a ceramic workpiece includes providing a sonotrode that has a transducer and a horn arranged along an axis, and the horn has helical slots and terminates at a tip, bringing the tip into proximity of the ceramic workpiece and providing an abrasive media to a work zone around the tip, using the transducer to produce ultrasonic vibration that axially propagates down the horn and causes axial vibration at the tip, and the helical slots convert a portion of the axial vibration to torsional vibration at the tip, and the axial vibration and the torsional vibration causing the abrasive media to abrade the ceramic workpiece in the work zone and thereby remove a localized portion of the ceramic workpiece.
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公开(公告)号：US20220356125A1
公开(公告)日：2022-11-10
申请号：US17314434
申请日：2021-05-07
发明人： Robin H. Fernandez
IPC分类号： C04B41/53
摘要： A method for forming a hole in a ceramic matrix composite component includes providing a first tool component with a first hole, providing a fiber preform of the ceramic matrix composite component on the first tool component, positioning a second tool component on the fiber preform, such that the fiber preform is disposed between the first and second tool components, inserting a rod into the first and second holes and through the fiber preform, and performing a densification step of the fiber preform in the first and second tool components. The second tool component has a second hole coaxial with the first hole. The fiber preform is densified with a ceramic matrix.
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10.发明公开公开(公告)号：US20240344255A1
公开(公告)日：2024-10-17
申请号：US18134941
申请日：2023-04-14
发明人： Robin H. Fernandez
IPC分类号： D04H18/00 , C04B35/628 , C04B35/64 , C04B35/657 , C04B35/80
CPC分类号： D04H18/00 , C04B35/62884 , C04B35/64 , C04B35/657 , C04B35/80 , C04B2235/5244 , C04B2235/5256 , C04B2235/614 , C04B2235/616
摘要： A tooling assembly for debulking a fibrous preform includes a first tooling fixture comprising a plurality of receiving holes, and a second tooling fixture comprising a plurality of pins projecting toward the first tooling fixture, each of the plurality of pins corresponding to and extending towards one of the plurality of receiving holes. The second tooling fixture is engageable with the first tooling fixture to define an inner volume therebetween, the inner volume configured to support the preform during debulking while a compressive force is applied thereto.
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