Sectional material self-bending forming extrusion die

Abstract

The invention relates to a sectional material self-bending forming extrusion die, and relates to the technical field of dies. The sectional material self-bending forming extrusion die is used for solving the technical problem that the cross section deformation is easily caused when the outer side surface of a sectional material is subjected to large stress in the prior art. The sectional materialself-bending forming extrusion die comprises an upper die and a lower die connected to the upper die; and due to the fact that the area covered by an inner contour line of the upper half part of a flow guide cavity is larger than the area covered by the inner contour line of the lower half part of the flow guide cavity, and the area covered by an inner contour line of the upper half part of an extrusion cavity is larger than the area covered by the inner contour line of the lower half part of the extrusion cavity, the metal amounts flowing into the upper sides of the flow guide cavity and theextrusion cavity is more than those flowing into the lower sides correspondingly, so that a blank is pre-deformed firstly during extrusion, the extrusion load on the outer side surface of the sectional material can be reduced, and extrusion molding is facilitated.

Description

technical field [0001] The invention relates to the technical field of molds, in particular to a profile self-bending extrusion mold. Background technique [0002] Curved aluminum profiles mostly adopt the production process of extrusion first and then bending, and the difficulty of forming lies in the bending process. Commonly used bending methods mainly include rolling bending, mold pressure bending and stretching bending. Among them, rolling bending can ensure that the section of the profile does not deform during bending, and only need to adjust the relative position between the rollers, saving Production time, but the springback radius of roll bending is large, and there is a section at the front and rear ends of the profile that cannot be bent, which must be cut off after forming, resulting in material waste; the surface quality of the product made by pressure bending is high, but the shape of the curved section For complex car sunroof guide rails, it is easy to cause...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a profile self-bending forming extrusion die, which is used to solve the technical problem in the prior art that the outer surface of the profile is easily deformed due to greater stress

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