Self-piercing rivetless connection device and method for shot blasting

Abstract

The invention provides a self-piercing rivetless connection device and method for shot blasting, comprising: a cutting device, a mold is wrapped on the outside of the cutting device, a movable annular cutting tool is arranged inside the mold, and the annular cutting tool is There is an upper push rod and a lower push rod movable inside the tool, a movable piston rod is arranged between the upper push rod and the lower push rod, a piston is fixed at the end of the piston rod, and a hydraulic oil chamber is provided at the left end of the piston A processing device, the processing device is located on the right side of the cutting device, and the processing device includes a blank holder, an upper plate and a lower plate; a nozzle, the nozzle is located on the right side of the processing device. In the forming process of the present invention, the cutting and forming of the plate are completed in one step, without the need for multiple sets of molds and multiple installations; the method of shot blasting is used to improve the ability of the joint to resist tensile stress and crack and break when it is loaded, and to improve the strength of the joint.

Description

technical field [0001] The invention relates to the field of rivetless connection, in particular to a self-piercing rivetless connection device and method for shot blasting. Background technique [0002] With the consumption of energy and the enhancement of people's awareness of environmental protection, the development of automobile lightweight has received more and more attention. As a material with high strength-to-weight ratio, aluminum alloy is more and more widely used in lightweight body, which can significantly reduce the weight of the whole vehicle. However, due to the natural oxide film on the surface of the aluminum alloy, the connection performance of the welding method is poor, and there is air pollution, which is contrary to the original intention of environmental protection. For dissimilar materials, the performance of welding is further limited due to different thermal conductivities. Traditional riveting is less affected by the performance of connecting ma...

AI Technical Summary

Problems solved by technology

The connection strength of traditional riveting mainly depends on the material of the rivet. In order to meet the load capacity, reliability and safety of the structure, the material of the rivet is also subject to many restrictions

When connecting the lightweight material titanium alloy, the rivets are prone to cracks and the reliability of the connection is reduced

Under the current general trend of automobile lightweight, traditional riveting requires rivets, which increases the weight of the structure and does not meet the current development requirements. The use of rivets also increases the process cost of traditional riveting

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