The Analysis Of The Static And Dynamic Characteristics Of The Key Component Of The XK713 NC Milling Machine

The dynamic performance analysis of machine tool components is an important content in machine tool design. It contains inhesion characteristic and dynamic response of machine tool structure and aims to enhance vibrant resistant capacity and machining precision. One graduate school is in process of XK713 NC milling machine design, so it requires the analysis of the static and dynamic characteristics.The research object of this article is XK713 NC milling machine. It used finite element and experimentation method, analyzed the dynamic characteristics of NC milling machine and provided academic principles for dynamic study and optimized design. First of all, in this article, it analyzed the finite element mode in main parts of XK713 NC milling machine and studied static strain, mode, critical rotate velocity, frequency response, principal bearing sympathetic vibration and machining precision for milling cutter principal bearing according to finite element method and MSC.Nastran software. With the finite element mode analysis in headstock, stand pole, whole machine of XK713 NC milling machine, it finds the weakness mode of NC milling machine. Then it put up the inhesion frequency test which contained vacant running test and cutting test and obtained dynamic characteristics parameters.The milling cutter principal bearing finite element analysis showed that the safe coefficient is enough, the rotate speed of principal bearing is greatly under critical rotate speed and the response point radial displacement reflected machining precision of XK713 NC milling machine in certain extent. The finite element mode analysis in headstock, stand pole, whole machine of XK713 NC milling machine indicated that the weakness structure in milling machine is stand pole. In cutting and vacant running test, it suggested the machine tool inhesion vibration is in charge of the system turning parts imbalance. In the test, it received two lowness rank frequency, with the same number level to the whole finite element analysis of XK713 NC milling machine. It verified the finite element model basically matching case for the fact in certain extent.