Modularized extrusion molding apparatus and method for section bar with order-variable cross sections

Abstract

The invention provides a modularized extrusion molding apparatus and a modularized extrusion molding method for a section bar with order-variable cross sections, belonging to the field of extrusion processing technology. The invention overcomes the problems of numerous procedures, high process requirements, a substantial texture tendency and difficult implementation of conventional preparation methods for bars with different cross sections and defects like easy generation of folds and superposition of material interfaces, etc. during processing and preparation. The cavity of a first-order module, the cavity of a second-order module and the cavity of a third-order module of the apparatus are combined and form an axial step-like extrusion die cavity with a continuous order-variable surface. The method comprises the following steps: assembling the apparatus; and placing a blank material in an extrusion cylinder, putting in a punch, allowing the punch to descend so as to extrude the blank material from the die orifice of the first-order module, the die orifice of the second-order module and the die orifice of the third-order module, stopping descending of the punch, removing the third-order module, allowing the punch to go a distance downwardly, then stopping descending of the punch, removing the second-order module and allowing the punch to descend again so as to realize extrusion molding of the blank material. The invention has the following beneficial effects: the apparatus is simple, the number of production procedures is small, and the method can be easily implemented, popularized and applied in production.

Description

technical field

[0001] The invention relates to a modular extrusion forming device and method for step-variable cross-section profiles, a device and a method for forming solid profiles with different cross-sections, and belongs to the technical field of extrusion processing. Background technique

[0002] Aerospace vehicles, transportation equipment, etc. are products that consume a lot of energy and resources, affect the environment, and require huge infrastructure support. Their development is facing huge challenges from energy, environmental protection, and safety. In the long run, lightweight is one of the main ways to achieve energy saving and emission reduction, which not only endows parts with complex geometric features but also enables them to achieve high performance. There are two main ways to realize the lightweight structure: one is the structural way, which adopts the variable cross-section components of "replacing the solid with space", which not only reduces th...

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