Method for milling large diameter thread of titanium alloy or high-temperature alloy material pieces

The invention provides a method for milling a large diameter thread of titanium alloy or high-temperature alloy material pieces, which particularly aims at machining threads, with a large bore diameter over M30, of a difficult-to-machine material such as high-temperature alloy or titanium alloy. Due to the adoption of the digital control technology and the analysis of parameters of the large diameter thread, a thread milling cutter is determined; spiraling is mainly realized by the motions of a machine tool during machining, so the important thing of thread milling is how to control the motions of the machine tool, and particularly the thread milling has higher requirements on the machining parameters; and the method improves the machining efficiency and simultaneously ensures the thread verticality and the thread surface finishment, so the quality of thread machining is greatly improved.