公开(公告)号：US20230093834A1

公开(公告)日：2023-03-30

申请号：US17931152

申请日：2022-09-12

Applicant: ROLLS-ROYCE plc

Inventor： Dharun VADUGAPPATTY SRINIVASAN ,  Sridhar IDAPALAPATI

IPC: F01D5/00 ,  F01D5/28 ,  B29C73/10 ,  B29C73/26

Abstract: A method of repairing a composite blade. The composite blade includes a metal work bonded to a composite part through an adhesive layer. The method includes determining a locally damaged portion of the metal work, and removing a bullet portion corresponding to the locally damaged portion. The method further includes detaching, debonding, and removing a first wing portion from the composite part to obtain a first exposed surface portion. The method further includes detaching, debonding, and removing a second wing portion from the composite part to obtain a second exposed surface portion. The method further includes reconditioning the first and second exposed surface portions to obtain first and second reconditioned surface portions, respectively, and applying first and second adhesive layers to the first and second reconditioned surface portions respectively. The method further includes bonding a metal work patch to the first and second adhesive layers.

公开(公告)号：US20200164626A1

公开(公告)日：2020-05-28

申请号：US16690321

申请日：2019-11-21

Applicant: ROLLS-ROYCE plc

Inventor： Wu Xin Charles NG ,  Dharun VADUGAPPATTY SRINIVASAN ,  Atin AGGARWAL ,  Sridhar IDAPALAPATI

IPC: B32B43/00 ,  B26D3/28

Abstract: A method (1800) of debonding a first layer (404) from a second layer (408), wherein the first layer (404) is bonded to the second layer (408) by an adhesive (410) located between the first and second layers, comprises: inserting (1804) a blade (602) of a cleaving tool (600) between the first and second layers (404, 408); and exerting (1806) a controlled force on the cleaving tool (600) to move the cleaving tool so as to de-bond the first and second layers (404, 408) in a region, wherein the force exerted is controlled to match a de-bonding force calculated for the region, and such that the movement of the cleaving tool (600) stops if the calculated force is less than force required to move the cleaving tool (600) and continued if the calculated force is higher than or equal to the force required to move the cleaving tool.