Mould used for stretching long cone body

Abstract

The invention discloses a mould used for stretching a long cone body. The mould comprises a lower mould plate (1), an upper cover plate (8), a concave die (3) and a terrace die (7), wherein the terrace die (7) is connected to the top of the lower mould plate (1) through first bolts (10); the concave die (3) covers the top of the terrace die (7); the upper cover plate (8) is connected to the upperpart of the concave die (3) through second bolts (9); the lower part of the outer side of the terrace die (7) is also provided with an edge pressing ring (2); and the edge pressing ring (2) is positioned on the bottom of the concave die (3). According to the mould, a shaping surface and the taper-shaped terrace die are cooperated to realize compression molding. In a shaping process, a part is evenly stressed, accuracy is higher after shaping, the surface of the shaped part is free from damage by pulling, so that the shaping accuracy of the shaped part can be more favorably guaranteed to achieve a satisfactory appearance state of the shaped part, and the part with better quality can be formed. In addition, a long cone does not need to be subjected to secondary shaping, but is shaped properly in one time, the appearance state of the part is better, and a good use effect is obtained.

Description

technical field [0001] The invention relates to a mold, in particular to a mold for stretching a long tapered cylinder, and belongs to the technical field of mechanical manufacturing equipment. Background technique [0002] In the field of aviation and aerospace, thin-walled cylinder parts such as afterburner cylinder, outer wall of combustion chamber and casing are often formed by molds. Thin-walled cylindrical mold forming is an important process in the manufacture of such parts. However, it is technically difficult to form thin-walled small-inclination cone barrels at present. However, the ordinary stretching process cannot stretch the thin-walled cone barrel, only the straight barrel can be stretched. The problems existing in the general stretching process when stretching this kind of thin-walled cone barrel are: stretching near the opening cracks, the flange of the stretched part will wrinkle, and the upper edge of the stretched part will bulge, these are all technica...

AI Technical Summary

Problems solved by technology

However, at present, it is technically difficult to form a thin-walled cone with a small inclination angle.

However, the ordinary stretching process cannot stretch the thin-walled cone barrel, only the straight barrel can be stretched. The problems existing in the general stretching process when stretching this kind of thin-walled cone barrel are: stretching near the opening cracks, the flange of the stretched part will wrinkle, and the upper edge of the stretched part will bulge. These are all technical problems that need to be solved

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