公开(公告)号：US20200171577A1

公开(公告)日：2020-06-04

申请号：US16695727

申请日：2019-11-26

Applicant: ROLLS-ROYCE plc

Inventor： Daniel CLARK ,  Andrew R RAMSHAW

IPC: B22F7/06 ,  F16H57/08 ,  F02C7/36

Abstract: A method of manufacturing a planet carrier of a gearbox comprises manufacturing a plurality of preforms. Each preform comprises a base portion, a first end portion connected to a first end of the base portion, a second end portion connected to a second end of the base portion, a first side portion connected to a first side of the base portion, a second side portion connected to a second side of the base portion and a top portion. The first and second end portions and the first and second side portions are folded relative to the base portion and the top portion is folded and the adjacent edges of the portions of each preform are secured together to form a support structure. A first ring and a second ring are manufactured. The first and second end portions of each support structure are secured to the first and second rings respectively.