The utility model comprises a base body and a knife body. The base body is provided with convex grooves along the disc edge, a plurality of dovetail grooves are evenly distributed along the circle, inverted dovetail convex wedges are set in the middle of two adjacent dovetail grooves, and stiffeners are set at the root of the convex grooves and the middle ring at the bottom of the plurality of groove grooves. The knife body is calcined and fixed on the convex grooves composed of dovetail grooves, dovetail convex wedges and stiffeners.
characteristic
Because the above structural forms are selected for this product, when the knife body is restrained from being calcined at the convex ridge, the knife body can not only fix the knife body on the substrate according to the reverse buckle effect of the dovetail groove, but also increase the fixing surface between the knife body and the substrate by using the fusion of both sides of the dovetail convex wedge and stiffener with the outer wall of the core shaft of the knife body, Then the firmness of the connection between the tool body and the matrix and the stability of application are completed.
