A friction-assisted heat flat bottom riveting-free connection method for lightweight plates

Abstract

The invention relates to a light-weight plate friction auxiliary-heating flat-base no-rivet connecting method. A friction head and a punch firstly rotate at a high speed so as to be used for locally frictional heating a part to be riveted; the friction head then stops rotating, a blank holder force is applied to the part to be riveted, a pressing head downwards moves the punch under the action ofa punch power source, metals of an upper plate and a lower plate flow in a cavity between the friction head and the punch under a joint action force of the friction head and the punch, and an inlaid inverted omega-shaped mechanical lock is formed between the upper plate and the lower plate; and after a preset base thickness value or preset pressure are achieved, the pressing head and the punch move upwards to an initial position, and a connecting process is finished. According to the light-weight plate friction auxiliary-heating flat-base no-rivet connecting method provided by the invention, acrack-free flat-base riveting connector can be obtained, a required riveting action force is reduced, a riveting flaw is reduced, the strength of the riveting connector is improved, the connecting method is higher in efficiency, simple and convenient to operate and lower in energy consumption, the riveting connector is flat and smooth in surface, one side surface of each plate is flat and smooth,and the connecting method is suitable to be applied in occasions with relative movement on the surfaces of the plates.

Description

technical field [0001] The invention belongs to the technical field of plate connection, and in particular relates to a friction-assisted heating flat-bottom 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 is a new process that can realize the connection without any auxiliary materials, so it has become one of the important methods for the connection of thin plates. The traditional rivetless plastic connection will produce a high protrusion on one side of the board and a depression on the other side, which seriously affects the appearance of the board connection. The prot...

AI Technical Summary

Problems solved by technology

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

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