CNC Machining technology originated from the needs of the aviation industry. In the late 1940s, a helicopter company in the United States put forward. The initial assumption of CNC machine tools, in 1952, Massachusetts Institute of Technology developed three coordinate CNC milling machine. In the mid 50s, this CNC milling machine was used to process aircraft parts. In 60s, CNC system and programming work has become increasingly sophisticated and perfect, CNC machine tools have been used in various industrial sectors, but the aerospace industry has always been the largest user of CNC machines. Some large aircraft factories are equipped with hundreds of numerical control machine tools, mainly cutting machine tools. Custom Machining Aerospace Component needs CNC machining.