Heating type electromagnetic rivet-free connecting device and working method

Abstract

The invention provides a heating type electromagnetic rivet-free connecting device and a working method. The connecting device comprises a fixed frame. A puncher pin drive device is arranged on the upper portion of the fixed frame, and a rivet mold is arranged on the lower portion of the fixed frame. An induction heating coil capable of heating to-be-connected workpieces through the eddy current effect is arranged on the rivet mold. The puncher pin drive device comprises an electromagnetic induction coil and a driver connected with a puncher pin and provided with a metal structure. The electromagnetic induction coil is adjacent to or connected with the metal structure of the driver. When the electromagnetic induction coil works, the induced current capable of forming a mutual exclusion magnetic field is induced by an alternating magnetic field formed by powering on the electromagnetic induction coil on the metal structure of the driver, the electromagnetic induction coil pushes the driver to move downwards through electromagnetic repulsive force, and the puncher pin is driven to impact on the two heated to-be-connected metal workpieces on the rivet mold so that the to-be-connectedmetal workpieces can be connected. Through the principle of electromagnetic induction heating, preheating of two kinds of to-be-connected metal is achieved, electromagnetic force is used as drive forso that the two kinds of to-be-connected metal workpieces can generate deformation to achieve one-time punching forming, and the forming effect is improved.

Description

technical field [0001] The invention relates to the technical field of electrothermal processing, in particular to a heating type electromagnetic rivetless connection device and a working method. Background technique [0002] The manufacturing capacity of automobiles is an important manifestation of a country's comprehensive national strength. In recent years, my country's automobile industry has developed rapidly, and its current production and sales have surpassed that of the United States, ranking first in the world. Reducing the weight of automobile bodies is an effective way to improve automobile economy. Research shows that when the weight of the vehicle is reduced by 10%, the fuel economy is increased by 3.8%, the acceleration time is reduced by 8%, the CO2 emission is reduced by 4.5%, the braking distance is reduced by 5%, the tire life is increased by 7%, and the steering force is reduced by 6%. . The key to realize the lightweight of the car is to use a large num...

AI Technical Summary

Problems solved by technology

[0004] Rivetless connection requires a large amount of forming force in the stamping process. The existing rivetless connection equipment mainly focuses on the adjustment of the structure of the rivetless connection device, but the power source still mainly uses traditional hydraulic pressure and air pressure, so that riveting and forming The space for improving the performance of the post-connection joint is limited, and the rivetless connection improvement scheme for some materials with high deformation resistance and poor joint performance after forming is limited. The forming process has certain limitations, and it is difficult to achieve one-time stamping forming

Due to the use of the cold deformation ability of the plate itself, the plate is locally deformed and the mechanical connection of the plate is connected together, resulting in the forming effect and the performance of the connection joint are not ideal, and cracks are easy to occur on the plate.

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