Accurate positioning device for ceramic tile trepanning

The precise positioning device comprises an L-shaped framework, the transverse portion and the longitudinal portion of the framework are each provided with a guide rail and a length scale line, and a sliding block is arranged on each guide rail in a sliding mode. The guide rail provides guiding and limiting for sliding of the sliding block, the length scale marks are used for accurately marking the position of the sliding block, a first positioning structure is arranged between the sliding block and the guide rail, after the sliding block slides to a preset position along the guide rail, the position of the sliding block is fixed through the first positioning structure, and the sliding block is hinged to an accurate positioning strip. A second positioning structure is arranged between the precise positioning strip and the sliding block, and the sliding block is connected with a protractor matched with the precise positioning strip. The transverse position and the longitudinal position of the precise positioni