本发明涉及汽车制造技术领域，具体公开了一种轮毂的直锻模具及其锻造工艺，该轮毂的直锻模具包括上模，其上设有上型面；下模，其位于上模下方，其上设有下型面；侧模，多个侧模沿下模的周向设置，侧模上设有圆弧形的分侧型面；第一驱动装置，与侧模一一对应连接，能够驱动侧模沿下模的径向方向往复运动，且能够驱动侧模与下模贴合；锁模套，呈环形，用于在合模时将多个侧模和下模锁紧；合模时，多个侧模的分侧型面依次相连，并构成圆形的侧型面，上型面、下型面以及侧型面构成轮毂的型腔。通过侧模成形出轮毂的侧型腔，当锻造结束后，侧模均通过第一驱动装置远离下模，轮毂可顺利的从下模脱模，实现轮毂的直接锻造生产。

The invention relates to the technical field of automobile manufacturing, and specifically discloses a straight forging die for a wheel hub and a forging process thereof. The straight forging die for the wheel hub includes an upper die on which an upper profile is provided; and a lower die, which is located below the upper die. It is provided with a lower profile; a side mold, a plurality of side molds are arranged along the circumference of the lower mold, and the side mold is provided with an arc-shaped sub-side profile; the first driving device is connected to the side mold one by one, It can drive the side mold to reciprocate in the radial direction of the lower mold, and can drive the side mold to fit the lower mold; the clamping sleeve is ring-shaped, used to lock the multiple side molds and the lower mold when the mold is closed; When molding, the sub-side molding surfaces of a plurality of side molds are sequentially connected to form a circular side molding surface, and the upper molding surface, the lower molding surface and the side molding surface constitute the cavity of the hub. The side cavity of the hub is formed by the side mold. After the forging is completed, the side molds are moved away from the lower mold through the first driving device, and the hub can be demolded from the lower mold smoothly, realizing the direct forging production of the hub.