Manufacturing method of vehicle brake disc

The invention relates to the field of vehicle component processing, and provides a manufacturing method of a vehicle brake disc, wherein the brake disc comprises a body disc and two friction rings, the manufacturing method comprises the following steps of: casting two friction rings by adopting a cast iron material; preparing a casting mold and a core mold, wherein the core mold and the two friction rings are respectively fixed in corresponding positions in a mold cavity; pouring molten aluminum alloy into the cavity to form the brake disc; carrying out heat treatment on the brake disc, wherein the inner surface of the friction rings jointed with the body disc is a rough surface, so that the body disc and the friction rings can be embedded into each other. The production method of the invention can be used for manufacturing an aluminum alloy body disk and a cast iron friction ring, and can fully give play to the wear resistance, high friction and high temperature resistance of the castiron by the combination