Dissimilar metal rivet welding connecting device, notch rivet and control method

Abstract

The invention discloses a dissimilar metal rivet welding connecting device, and belongs to the field of mechanical manufacturing. The dissimilar metal rivet welding connecting device comprises an impact electrode arranged from top to bottom, a guide mechanism, a spring pressure block mechanism, and a guide plate; the guide mechanism has a hollow structure; the impact electrode is connected with a power supply positive pole; the impact electrode is arranged in the guide mechanism and can slide along the guide mechanism from top to bottom; the spring pressure block mechanism is mounted below an inner hole of the guide mechanism and used for supporting a rivet; the guide plate is connected with a power supply negative pole; and the surfaces of an impact guide rod, the guide mechanism and the spring pressure block mechanism are coated with insulating layer. By the dissimilar metal rivet welding connecting device, stamping force of a notch rivet penetrating through a material and the deformation of a joint can be effectively reduce, the rivet welding contact area between the rivet and dissimilar metal can be increased, the rivet welding stability of the dissimilar metal can be improved, cracks of the rivet can be avoided, mechanical properties of the material can be ensured, and the stability of the connection is enhanced. The invention also discloses a notch rivet and a rivet welding control method which are used for the dissimilar metal rivet welding connecting device.

Description

technical field [0001] The invention relates to a connection device, a rivet and a control method, in particular to a connection device, a notch rivet and a control method for moldless rivet welding of a thin metal plate and a dissimilar metal structure, belonging to the field of mechanical manufacturing. Background technique [0002] With the intensification of global environmental pollution, in order to achieve energy saving and emission reduction, non-ferrous light alloys are increasingly widely used in aircraft and automobile manufacturing. Such as aircraft doors and automobile body panels, which are usually connected by dissimilar metal sheets (aluminum, magnesium alloy) and structural parts (high-strength rigid, ultra-high-strength rigid) to form a thin-plate frame structure, which has good safety and weight. Lightweight and high structural efficiency. For the thin plate frame structure assembly of this kind of dissimilar metals, the traditional spot welding, riveting...

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Problems solved by technology

However, in practice, it is found that the above-mentioned process has many limitations: (1), when connecting high-strength and high-hardness metal materials, there is a lack of auxiliary deformation of the mold, and ordinary semi-tubular rivets need a lot of pressing force to penetrate the metal sheet. At the same time, there are excessive and uneven deformations of the connector and the notch rivet, which leads to the inability to produce a good contact boundary problem required for welding; (2), the design of the impact electrode needs to consider the matching of the electrode diameter and the size of the notch rivet cap, because The riveting force is high, and it is difficult to meet the requirements of strength and electrical conductivity in the selection of electrode materials; (3), this process cannot soften the material to reduce the riveting force, and cannot suppress the generation of brittle metal riveting cracks after the riveting is completed.

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