US 11,717,915 B2
Joining method
Simon E Bray, Derby (GB); Charlotte Gibson, Derby (GB); Gemma A Raven, Royston (GB); and Peter A Stevens, Derby (GB)
Assigned to ROLLS-ROYCE PLC, London (GB)
Filed by ROLLS-ROYCE plc, London (GB)
Filed on Jun. 12, 2020, as Appl. No. 16/900,013.
Claims priority of application No. 1908479 (GB), filed on Jun. 13, 2019; application No. 1909875 (GB), filed on Jul. 10, 2019; and application No. 1909876 (GB), filed on Jul. 10, 2019.
Prior Publication US 2020/0391322 A1, Dec. 17, 2020
Int. Cl. B23K 20/00 (2006.01); B23K 20/24 (2006.01); B23K 20/12 (2006.01); F01D 5/06 (2006.01); C21D 7/06 (2006.01); F02C 3/107 (2006.01); B23K 101/00 (2006.01); B23K 103/10 (2006.01); B23K 103/14 (2006.01)
CPC B23K 20/24 (2013.01) [B23K 20/002 (2013.01); B23K 20/12 (2013.01); B23K 20/121 (2013.01); B23K 20/126 (2013.01); B23K 20/129 (2013.01); C21D 7/06 (2013.01); F01D 5/066 (2013.01); F02C 3/107 (2013.01); B23K 2101/001 (2018.08); B23K 2103/10 (2018.08); B23K 2103/14 (2018.08); C21D 2221/02 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method of friction welding a first component to a second component, the method comprising the steps of:
rotating the first component relative to the second component about a rotation axis; and
bringing the first component into contact with the second component;
wherein, while the first component and the second component are in contact, a first average force is applied during a first stage of the friction welding process and a second average force is applied during a second stage of the friction welding process, wherein force applied during the second stage changes at a constant rate until the friction welding process is complete;
the second average force is different from the first force; and
the rotation speed of the first component relative to the second component decreases during the first stage.