An electromagnetic pulse welding process and equipment for electronic packaging

Abstract

The invention discloses an electromagnetic pulse welding process and equipment for electronic packaging, which is used to solve the problems that the magnet collector is easily deformed and has a short service life, and can also reduce the interference of the surrounding magnetic field on the coil magnetic field, including the following process flow: Surface treatment, tooling preparation, welding, heat treatment, performance and quality inspection of the welding surface. In the tooling preparation stage, the shape of the magnetic collector in the electromagnetic pulse welding equipment needs to be trimmed to correct possible deformation; its structure includes: power supply , capacitors, switches, coils, and magnetic collectors. The power supply connects the capacitors, switches, and coils into a current path. The magnetic collectors are located between the coils and the workpiece to converge the coil magnetic field to increase the local electromagnetic force. The edge of the magnetic collectors An external solid ring is provided, and the external solid ring is connected with the magnetic collector to improve the anti-deformation ability. The external solid ring is provided with a magnetic ring, and the magnetic field direction of the magnetic ring is the same as that of the coil magnetic field, which can reduce the influence of the peripheral magnetic field on the coil magnetic field.

Description

technical field [0001] The invention belongs to the field of welding technology, and in particular relates to an electromagnetic pulse welding process and equipment for electronic packaging. Background technique [0002] Electromagnetic forming uses electromagnetic force to deform metal blanks. It is a high-speed and high-energy material processing technology. The forming speed of electromagnetic forming is as high as 50-300m / s. The biggest feature between it and the traditional metal forming process is that the magnetic pressure is large and the pressure is continuous. The time is short and the deformation of the workpiece is fast. In addition, the forming system of electromagnetic forming is also quite different from the traditional forming method. The forming of the former workpiece does not require a punch, but only a die, so it has been widely used in many fields. In the field of electronic packaging, due to the There are many welding parts, and most of them are carrie...

AI Technical Summary

Problems solved by technology

[0004] Usually, when electromagnetic pulse welding is used, it is also necessary to install a magnet collector to concentrate the magnetic field generated by the coil through the magnet collector to improve the use effect, but the thickness of the magnet collector is relatively thin, and the strength of its edge is significantly reduced after being processed into a disc-shaped structure. It is easy to deform under the action of electromagnetic force during use. In addition, there are slits on the magnetic collector, and the parts around the slit are more likely to be deformed, and the slit cannot be blocked or canceled, otherwise the magnetic collector will not be able to function. The effect of magnetism collection, and the change of the size of the slit will also affect the magnitude of the magnetic field force, so in industrial production, it needs to be replaced frequently

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