Ironing and thinning die structure

The utility model relates to an ironing and thinning die structure, comprising a female die device; the female die device is of a step structure formed by multiple stages of ironing and thinning female die inserts; the inner diameters of the ironing and thinning female die inserts are gradually reduced stage by stage; the gradual increment of an R angle is realized by the inclined slopes of the ironing and thinning female die inserts, so the ironing and thinning intensity is gradually reduced, and the accumulation during the ironing and thinning of a material is reduced. A cylinder part, with a thinner cylinder wall, produced and obtained by adopting the die effectively avoids the problems that the thickness of the ironing and thinning side wall is uneven, a product is broken in the ironing and thinning process, and the like; both the production efficiency and the percent of pass of the product are improved; an ironing and thinning punch is protected by using the slope structure at the connection position bet