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The company was called Thompson Ramo Wooldridge Inc., after the 1958 merger of the Ramo-Wooldridge Corporation and Thompson Products. This was later shortened to TRW. This was later shortened to TRW. The company was founded in 1901 and lasted for just over a century until being acquired by Northrop Grumman in 2002.
Rotary friction welding is widely implemented across the manufacturing sector and has been used for numerous applications, [17] [18] [19] including: Parts in gas turbine such as: turbine shafts, turbine discs, compressor drums, [20]
Some applications and patents connected with friction welding dates back to the turn of the 20th century, [3] and rotary friction welding is the oldest of the methods. [4] W. Richter patented the method of linear friction welding (LFW) process in 1924 [ 5 ] in England and 1929 [ 5 ] in the Weimar Republic .
This is a list of welding processes, separated into their respective categories. The associated N reference numbers (second column) are specified in ISO 4063 (in the European Union published as EN ISO 4063 ). [ 1 ]
Frederick Coolidge Crawford (March 19, 1891 – December 9, 1994) was an American industrialist and philanthropist.He was also the president of Thompson Products, Inc. (which later became part of TRW) and a major promoter of the National Air Races in Cleveland.
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