Background of CNC Machining Technology:
CNC technology originated from the needs of the aviation industry. In the late 1940s, an American helicopter company proposed.
In 1952, the Massachusetts Institute of technology developed a three-axis CNC milling machine. In the mid-1950s, this CNC milling machine has been used to process aircraft parts. In the 1960s, the CNC system and programming became more and more mature and perfect. CNC machine tools have been used in various industrial departments, but the aerospace industry has always been the largest user of CNC machine tools. Some large aviation factories are equipped with hundreds of CNC machine tools, mainly cutting machine tools. The parts processed by numerical control include integral wall panels, girders, skins, partition frames, propellers of aircraft and rockets, die cavities of aero-engine casings, shafts, disks and blades, and special cavity surfaces of liquid rocket engine combustion chambers. At the initial stage of the development of CNC machine tools, continuous trajectory control was the main method.
Continuous trajectory control, also known as contour control, requires the tool to move relative to the part according to the specified trajectory. After that, we vigorously developed point control CNC machine tools. Point position control means that the tool moves from one point to another, as long as it can finally reach the target accurately, regardless of the moving route.