Excircle conicity measuring device

The utility model discloses an excircle conicity measuring device. A cross plate is vertical to a bracket; one end of the cross plate is fixedly connected with the lower end of the bracket, and the other end thereof is provided with a retainer; the top part of the retainer is provided with a V-shaped groove; a micrmeter head support which is parallel to the cross plate is arranged above the cross plate; one end of the micrmeter head support is provided with two micrometer heads in parallel, and the other end thereof is connected on the bracket; and the micrmeter head support can slide up and down along the bracket. The excircle conicity measuring device overcomes the limitation that the traditional method needs a precise ring gauge and can not carry out random measurement when being adopted to measure the conicity. The excircle conicity measuring device has compact structure, convenient operation and large measuring range, is particularly applicable to the measurement of large-diameter conicity, can reflect the conicity of the workpiece accurately, can carry out random measurement to the workpiece, and detect the conicity of the workpiece in time, lead an operator to be capable of adjusting the angle of a cutter in time and guarantee the processing accuracy of the workpiece.