Thinning and edge overturning forming method and structure applied to thinning and edge overturning forming

The invention discloses a thinning and edge overturning forming method. The thinning and edge overturning forming method includes the following steps that firstly, stamping is performed on a plate-shaped blank material, a pre-stamping structure is formed, and provided with a groove and a boss, the groove is located on the upper surface of the blank material, the boss is located on the lower surface of the blank material, that is, the groove and the boss are oppositely arranged up and down, the groove and the boss are located on the same axis, and the diameter of the groove is smaller than the diameter of the boss; and the periphery of the groove in the blank material is of a plane structure; secondly, hole punching is performed on the pre-stamping structure, and pre-punched holes are formed; and thirdly, the blank material where hole pre-punching is completed is placed on an edge overturning female die, an edge overturning male die matched with the edge overturning female die is arranged above the edge overtu