Machining process of automobile door ring

The invention discloses an automobile door ring machining technology, and relates to the field of automobile part machining, the automobile door ring machining technology comprises the following steps: S1, an A column upper side blanking piece a, an A column lower side blanking piece b, a B column upper side blanking piece c, a B column lower side blanking piece d and a threshold area blanking piece e are formed; s2, an A column patch plate blanking piece f and a B column patch plate blanking piece g are formed; s3, the blanking pieces a-e are welded together through laser, the blanking pieces f and g are connected to the blanking piece a on the upper side of the column A and the blanking piece c on the upper side of the column B in a spot welding mode, and a door ring blank is obtained; s4, the door ring blank is conveyed into a heating furnace to be heated; s5, hot stamping forming is conducted, and a semi-finished automobile door ring is obtained; s6, redundant offcut is removed, and the automobile door ri