Drawing die

Abstract

The invention discloses a drawing die which comprises an upper female die assembly and a lower male die. The upper female die assembly comprises an upper female die, a first pressing plate, a second pressing plate and a top die plate. A center material pressing block is sleeved with the upper female die assembly. The upper female die and the center material pressing block are commonly provided with an inner concave face. The lower male die is provided with an outer convex face. The sizes of drawing parts pressed between the inner concave face and the outer convex face are smaller than the size of the inner concave face and the size of the outer convex face. Protruding rods stretching out of the outer convex face are arranged on the lower male die and stretch out from the parts, not in pressure contact with the drawing parts, on the outer convex face. Sleeve holes for the protruding rods to stretch in are formed in the upper female die. The sleeve holes communicates with a through hole in the radial direction, wherein the through holes are located in the upper female die so as to be movably provided with the center material pressing block in a sleeved manner. A reset spring acting on the center material pressing block is arranged on the upper female die assembly. According to the drawing die, straight edge pressing materials do not need to be arranged on the drawing parts, and drawing material pressing can be ensured.

Description

technical field [0001] The invention relates to the technical field of drawing an automobile tailpipe liner, in particular to a drawing die. Background technique [0002] At present, when the more common drawing dies are used to draw and form the inner tank of the automobile tail pipe (the inner tank body of the final product is a curved surface, and there is no straight pressing edge on the edge of the inner tank), it is generally necessary to set a straight pressing edge on the drawing die In order to position the drawn part and prevent the drawn part from shifting during the drawing process. In order to realize that the straight-pressing edge blocks are pre-pressed around the drawn part before drawing, it is generally necessary to reserve redundant straight-pressing edges on the edges of the drawn parts for the direct-pressing edge blocks to press tightly, which will not only cause waste of materials , and the setting of the straight edge block makes the structure of the...

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