A kind of integral die friction rivetless connection method for lightweight plates

Abstract

Provided is an integrated female mold friction rivetless connection method for lightweight plates. The integrated female mold friction rivetless connection method comprises the steps that firstly, anauxiliary heat source is provided for high-speed rotation of a friction head and a punch, and portions to be riveted are locally friction-heated; then the friction head stops rotating and applies edgepress force to the portions to be riveted, the punch is pressed by a press head to move downwardly under the effect of a stamping power source, metal of the upper plate and metal of the lower plate are made to flow to a mold cavity of a lower mold, the female mold space is gradually filled with the metal till the mold cavity of the lower mold is filled with the metal, and an S-shaped mechanical lock is formed between the upper plate and the lower plate; and after the preset bottom thickness value or pressure is reached, the press head and the punch are moved upwardly to the initial positions,and the connection process is finished. By the adoption of the integrated female mold friction rivetless connection method for the lightweight plates, rivetless connection of the same kind or different kinds of low plastic lightweight plates under the room temperature can be achieved through one-time clamping, crack-free riveting joints can be obtained, the required riveting acting force is lowered, the riveting defect is overcome, the strength of the riveting joints is improved, the efficiency is higher, the operation is easy and convenient, and the energy consumption is lower.

Description

technical field [0001] The invention belongs to the technical field of plate connection, and in particular relates to an integral concave die frictionless rivetless connection method for lightweight plates. Background technique [0002] Due to the needs of environmental protection and energy saving, lightweight panels are more and more widely used in the fields of aerospace, transportation and electronic products. The problem of connecting lightweight panels of the same material, dissimilar materials, same thickness and different thickness has received extensive attention. The rivetless connection process uses special convex and concave dies to stamp the connecting plates, and uses the plastic deformation ability of the metal to form a mechanical lock through the embedding between the plates to achieve the purpose of connection. However, for materials with poor plasticity at room temperature, such as magnesium alloys and titanium alloys, deformation and cracking are prone t...

AI Technical Summary

Problems solved by technology

However, for materials with poor plasticity at room temperature, such as magnesium alloys and titanium alloys, deformation and cracking are prone to occur under ordinary pressure riveting, the required riveting force is large, and the reliability of riveted joints is poor.

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