Development Of Micrometer Feed Table And Experimental Research Of Cast Iron Bonded Grinding Wheels

With the development of science and technology, the hard and brittle materials, such as ceramics are meeting a wider adoption. In order to realize the ultra precision grinding of hard and brittle materials, the author studies micrometer feed table used in ultra-precision grinding and the spark truing of cast iron bonded diamond grinding-wheels technique.High precision micrometer feed system is a critical part of ultra precision machining system. It has the function of controlling the cut depth. So closely connecting the problems occurring during micro grinding, a micrometer feed table is studied and made in order to improve the feeding precision of the grinding machine further. In this thesis, the structure characteristics and working principle of a micrometer feed table is presented in detail. The micrometer feed table is driven by piezoelectric translator. With the aid of the finite element method, the structural parameter of the flexure hinges have been optimized. And the experiment of the table has been carried out. The results show that the displacement output feature meets the design requirements.The shape precision of grinding wheel affects the surface finish of work piece directly. But the precise truing of a cast iron bonded grinding wheel is considerably difficult. So the author carries out a series of experiments for spark truing on the base of sparkling processing principles, and at the same time a data collecting system is used to collect the current and voltage. With the help of it, the surface quality can be estimated real time. And at the same time roundness and taper of the grinding wheel are measured. By means of spark truing, the cast iron bonded diamond grinding wheel can meet the requirements of ultra precision machining.