Abstract: The method, high vibrating intensity double masses vibration super-fine grinding, is used to study the effect of nonlinear vibration on the thinning of granularity of ground material. The main vibrating system adopts nonlinear variable pitch spring, and its stiffness is a variable which varies with dynamic load, i.e. vibration intensity, so as to fit in with the needs of variable frequency speed control and close resonance of the system, thereby attaining the aim of stable work, energy conservation and high efficiency of the system. Annular rubber spring is adopted as the vibration reducing spring of the vibration reducing system. The elasticity modulus is small, so it is possible to obtain big elastic deformation and realize ideal nonlinear characteristic. The system has high internal resistance, so it can effectively absorb the suddenly added load and isolate the vibration. It is found in the experiment that the granularity of ground material has a tendency toward nanometer level. Presently, super-fine grinding of super-hard powder by using vibration grinding method has made a breakthrough and surmounted the micron level at home and abroad. A model machine is developed and a vibration experiment with man-made diamond powder is carried out. A phasic achievement is made, with an average input value of 10 μm and an average output value of 0.2 μm.

Key words: Double masses, High vibrating intensity, Nonlinear vibration, Principal vibration spring, Vibration grinds