Magnalium alloy automobile covering piece outer plate forming and manufacturing method

Abstract

The invention provides a magnalium alloy automobile covering piece outer plate forming and manufacturing method which comprises the following steps of die numerical control machining, die surface superfinishing, micro-distortion heat treatment, protective surface refining, circular bead streamline transition, draw bead optimizing, deburring die cutting edge passivating, flanging die retainer coreenlarging, and reverse-drawing debugging. The magnalium alloy automobile covering piece outer plate forming and manufacturing method provided by the invention has the advantages that a die has high precision, conforms to the dynamics curve and is smooth in stressing, so that the problems of surface stickiness of a magnalium alloy panel and easiness in scratching the surface are solved, and the product defects such as springback cracking and the like caused by a large number of material performance problems are overcome; and a springback effect of the materials are controlled, and experimentaldata is summarized, so that a magnalium alloy automobile covering piece outer plate is controllably formed, and the problems that the springback cannot be controlled, re-forming cannot be realized, and the product qualification rate is low are solved.

Description

technical field [0001] The invention relates to automobile mold processing, in particular to a method for forming and manufacturing an outer plate of a magnesium-aluminum alloy automobile cover. Background technique [0002] Automobile panels are mainly metal parts of automobile shells formed by sheet metal. At present, steel plates are the main materials. The main material for the molding of automobile panel molds is also steel plates. With the continuous improvement of quantification and automobile comfort requirements, the application of new materials in automobiles has become the focus of major automobile manufacturers, and cold stamping of new materials is the most economical and effective way. From the current existing technology, high-strength Automobile panels made of steel plates, aluminum alloys, magnesium-aluminum alloys and other materials are the main directions for the use of new materials. From the perspective of current technology, the forming technology of h...

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Problems solved by technology

[0002] Automobile panels are mainly metal parts of automobile shells formed by sheet metal. At present, steel plates are the main materials. The main material for the molding of automobile panel molds is also steel plates. With the continuous improvement of quantification and automobile comfort requirements, the application of new materials in automobiles has become the focus of major automobile manufacturers, and cold stamping of new materials is the most economical and effective way. From the current existing technology, high-strength Automobile panels made of steel plates, aluminum alloys, magnesium-aluminum alloys and other materials are the main directions for the use of new materials. From the perspective of current technology, the forming technology of high-strength plate materials for automotive panels has basically completed the forming of car body inner panels. Plate parts have also realized the forming technology of the main outer covering parts of automobiles, but the cold forming of magnesium-aluminum alloy automobile covering parts is affected by the material's own properties, such as low elongation, fast timeliness, easy damage to the surface, uncontrollable forming process, and springback. Influenced by factors such as large and difficult to grasp the pass rate, the cold stamping of the plate cannot be realized, which has become a difficulty and pain point in the development of the industry

[0003] The existing mold forming technology for the outer panel of automobile panels is mainly for cold forming of steel plates and high-strength steel plates. However, when the same technology is used to form the outer panels of magnesium-aluminum alloy automotive panels, the elongation of the material will be insufficient and the parts will crack; Problems with timeliness and material properties lead to uncontrolled molding results; material surface viscosity problems cause the surface of the material to be easily scratched, making it impossible to complete high-quality products; materials have strong resilience and cannot be molded again after molding, and the qualified rate of molded products low level problem

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