Variable channel corner self-bending extrusion die and its design, manufacture and extrusion method

Abstract

The invention provides a self-bending extrusion die with variable channel angle and its design, manufacture and extrusion method, and relates to the technical field of moulds, including the following steps: designing a symmetrical streamlined extrusion die based on a sine function; a symmetrical streamlined extrusion die The central axis of the mold cavity is twisted and deformed on a certain plane; the cavity wall equation of the variable channel angle self-bending extrusion mold is established; a working belt structure is added behind the cavity of the variable channel angle self-bending extrusion mold; the metal flows through the variable channel angle self-bending extrusion mold. After the channel corner is bent from the extrusion die, the extrusion speed is controlled to be linearly distributed, so that the curved parts are directly extruded, so the profile is not subject to lateral moment, so that the outer surface of the profile is reduced or the cross-sectional deformation is eliminated, and the metal is extruded during the extrusion process. The flow in the mold is smoother than the traditional stepped extrusion die, and the extrusion load becomes lower; it alleviates the technical problems of springback, wrinkling, and cross-sectional deformation during the bending process of the profile in the prior art and reduces the load during extrusion technical issues.

Description

technical field [0001] The invention relates to the technical field of molds, in particular to a variable-channel corner self-bending extrusion mold and its design, manufacture and extrusion methods. Background technique [0002] Bent aluminum profiles are widely used in aerospace, automobile, machinery manufacturing, shipbuilding and chemical industries and other fields. With the rapid development of the industrial economy, the demand for curved aluminum profiles in various fields is increasing. In the way of bending after extrusion, traditional secondary processing technologies such as push bending, pulling bending, bending, and rolling bending will bring about defects such as cracking, cross-section distortion, instability and wrinkling, and springback of aluminum profiles, which seriously affect the bending of aluminum profiles. forming rate. [0003] In the prior art, extrusion-bending integrated molding is adopted, and a bending device composed of annular discs or rol...

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Problems solved by technology

[0005] The object of the present invention is to provide a self-bending extrusion die with variable channel angle and its design, manufacture and extrusion method, so as to alleviate the technical problems of springback, wrinkling, and cross-sectional deformation during the bending process of the profile in the prior art and reduce extrusion. Technical problems of load during compression

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