Device and method for clinching martensitic steel plate

Abstract

The invention belongs to the technical field of clinching, and particularly relates to a device and a method for clinching a martensitic steel plate. The device comprises an upper die, a lower die, apunch, a holding head, an upper laser heater, a lower laser heater, thermistors, and cooling water channels, wherein through holes are formed in the centers of the upper die and the lower die; the upper die and the lower die are symmetrically arranged up and down; the punch is located in the through hole of the upper die; the holding head is located in the through hole of the lower die; both the punch and the holding head can move freely in the respective through holes; the upper laser heater is arranged in the bottom surface of the punch; the lower laser heater is arranged in the top surfaceof the holding head; and the upper die and the lower die is provided with thermistors and cooling water channels; and cooling water channels are arranged at a position, close to the upper laser heater, in the punch and a position, close to the lower laser heater, in the holding head. Rivets formed by the device are interlocked with a bottom material 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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