Capacitor guide pin and manufacturing method thereof

Abstract

The invention discloses a capacitor guide pin and a manufacturing method thereof. The capacitor guide pin is composed of an aluminum wire and a tin-plated copper-clad steel wire. A part of the aluminum wire is punched to form a flat head, and another part of the aluminum wire is a cylinder located at the transverse center line of the flat head. A transitional portion is formed between the flat head and the cylinder and is in a square R shape. The flat head is an arc structure. The tin-plated copper-clad steel wire and the cylinder of the aluminum wire are soldered and have a solder joint therebetween in a truncated cone shape. The front end surface of the tin-plated copper-clad steel wire is a circular arc end face, and has a radius of a half of the diameter of the tin-plated copper-clad steel wire. The transitional portion is in a square R shape and has large bending strength so as to avoid damage and fracture during the assembly of a container. The flat head is an arc structure so asto reduce the probability of piercing the inner foil and improve product quality. The size and the appearance of the solder joint can be well controlled to avoid puncturing the rubber in the apertureor exposure after a rubber plug is inserted.

Description

technical field [0001] The invention relates to the technical field of capacitor components, in particular to a capacitor guide pin and a manufacturing method. Background technique [0002] In the application, the capacitor has two guide pins as the signal source, and its guide pin function consists of two parts, namely internal connection and external connection. The guide pin material consists of two parts: aluminum wire and tinned copper-clad steel wire. After welding by arc welding, a part of the aluminum wire is stamped and deformed, and the required shape and size are obtained through the mold. The deformed part is in the shape of a rectangle. One part is not stamped and remains cylindrical. [0003] The internal connection of the guide pin is a rectangular thin sheet connected with the capacitor foil by cold pressing method, and then wound with insulating paper to form a core; the external connection of the guide pin is mainly that the tinned copper-clad steel wire p...

AI Technical Summary

Problems solved by technology

[0005] Tinned copper-clad steel wire section, one end is welded with aluminum wire to form a welding point, the size and appearance of the welding point are limited by the aperture size and thickness of the rubber plug of the capacitor, because the welding is performed under normal conditions, oxygen in the air will produce gas Explosion, the size and appearance of the burst point are difficult to control, resulting in the phenomenon that the rubber in the hole is punctured or exposed after the rubber plug is inserted (see figure 1 ); the other end of the tinned copper-clad steel wire has burrs and sharp angles due to the cut (see figure 2 ), after the capacitor is covered with a plastic sleeve in the post-processing process, the friction between the terminal and the capacitor will puncture and crack the plastic sleeve (see figure 1 )

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