Circumferential hob die

The upper hobbing cutter of the circumferential hobbing cutter die comprises a first hobbing cutter body, a first flexible layer is arranged on the periphery of the first hobbing cutter body, a cutter edge is arranged on the first flexible layer, a cutter extending outwards is arranged in the circumferential direction of the first hobbing cutter body, and the cutter penetrates through the cutter edge; the hob die further comprises an adjusting frame, and the adjusting frame is used for adjusting the distance between the first hob and the second hob. Due to the fact that the cutter is arranged on the first hobbing cutter body, when the diaphragm passes through the hobbing cutter die, the cutter rotates to cut the diaphragm, cutting of the diaphragm is achieved, the linear speed of rotation of the hobbing cutter is adjusted to be matched with the movement speed of the diaphragm, and cutting can be effectively achieved. And the cutting speed mainly depends on the moving speed of the diaphragm, so that the produc