A device and method of riveting non -rivet rivet

Abstract

The invention belongs to the technical field of rivetless riveting, and in particular relates to a device and method for riveting martensitic steel plates without rivets. The device includes: an upper mold, a lower mold, a punch, a holder, an upper laser heater, a lower laser heater, a thermistor and a cooling water channel. The centers of the upper mold and the lower mold are provided with through holes. The upper mold and the lower mold are symmetrically arranged on the upper and lower sides. Both the head and the support head can move freely in their respective through holes. The upper laser heater is set on the bottom surface of the punch, the lower laser heater is set on the top surface of the holder, the upper mold and the lower mold are equipped with thermistors and cooling channels, and the punch is close to the upper laser heater. A cooling water channel is also provided at the position of the support head and the position close to the lower laser heater. The rivet formed by the above-mentioned device and the underlying material are interlocked to ensure high connection strength.

Description

technical field [0001] The invention belongs to the technical field of rivetless riveting, and in particular relates to a device and method for riveting martensitic steel plates without rivets. Background technique [0002] The information disclosed in the Background of the Invention is only intended to increase the understanding of the general background of the invention, and is not necessarily to be taken as an acknowledgment or any form of suggestion that the information constitutes the prior art that is already known to those skilled in the art. [0003] With the depletion of energy, environmental protection, and the continuous improvement of global environmental protection legislation, the research on automobile lightweight and high-strength steel has become an important topic. The automobile body accounts for a quarter of the total weight of the automobile. Therefore, Reducing the weight of the body while maintaining strength is very important for fuel consumption and ...

AI Technical Summary

Problems solved by technology

First of all, in the construction process of rivetless riveting, it has high requirements for the actual working process conditions, and it is not easy to realize the connection work of metal plates with poor plasticity. Certain requirements, the riveted joint cannot be formed normally if the thickness is too thick or too thin

[0007] In spot welding technology, the strength of the riveted joint itself of rivetless riveting technology is lower than that of spot welding, so its plasticity is better in parts with higher bearing capacity requirements of automobiles and on materials with higher hardness and heat hardening treatment. Flow quality is not ideal

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