The utility model comprises a base body and a knife body. The above base body is provided with convex edges along the disc edge, several dovetail grooves are evenly distributed along the circle, disordered dovetail convex wedges are arranged in the middle of two adjacent dovetail grooves, and stiffeners are arranged in the middle ring between the root of the convex edge and the bottom of several groove grooves. The above knife body is fixedly connected with the dovetail groove On the convex ridge composed of dovetail convex wedge and stiffener.
characteristic
Due to the adoption of the above structure, when the tool body prevents forging and burning at the convex ridge, the tool body can not only make the tool body firmly connected to the matrix according to the reverse buckle effect of the dovetail groove, but also use the combination of both sides of the dovetail convex wedge and stiffener with the surface of the core rod of the tool body to improve the solid connection surface between the tool body and the matrix, Thus, the firmness of the connection between the tool body and the matrix and the reliability of application are completed.
