Welding electrodes for circuit breaker contact systems

Abstract

The invention discloses a welding electrode of a circuit breaker contact system. The welding electrode comprises a perpendicular electrode head mounted on a perpendicular electrode seat, wherein the perpendicular electrode head can be mounted in a manner of corresponding to a busbar groove group of a busbar; and the busbar groove group can be fixedly welded with a soft connection group corresponding to a movable contact group so as to enable the busbar, the movable contact group and the soft connection group to form the contact system. The perpendicular electrode head is of a U-shaped structure; a U-shaped groove is formed in the perpendicular electrode head with the U-shaped structure; and the busbar groove group can extend into the U-shaped groove and heating welding of the busbar groove group and the soft connection group can be completed. The welding electrode, provided by the invention, of the circuit breaker contact system is high in production efficiency, high in welding stability and high in product consistency.

Description

technical field [0001] The invention relates to the field of contact welding, in particular to a circuit breaker contact system welding electrode. Background technique [0002] At present, the welding process of the circuit breaker contact system adopts the fixed connection of the busbar and the soft connection group with multiple moving contacts with a simple fixture, and then performs manual welding for many times. However, this welding method cannot make the position and size of the soft connection group and the end of the busbar seat consistent, and it is easy to cause different burning conditions between the contacts of the moving contact, resulting in unstable operation of the contact system and poor reliability. At the same time, the simple fixture cannot be compatible with contact systems of various specifications, resulting in low fixture use efficiency and affecting the welding processing efficiency of the contact system. [0003] The existing circuit breaker cont...

AI Technical Summary

Problems solved by technology

However, this welding method cannot make the position and size of the soft connection group and the end of the busbar seat consistent, and it is easy to cause different burning conditions between the contacts of the moving contact, resulting in unstable operation of the contact system and poor reliability.

At the same time, the simple fixture cannot be compatible with contact systems of various specifications, resulting in low efficiency of fixture use and affecting the welding processing efficiency of the contact system

[0003] The existing circuit breaker contact system welding device uses the upper electrode and the lower electrode to be installed correspondingly and conducts electric heating welding on the pressed busbar, but this welding method is not suitable for thicker busbars due to the large distance between the upper and lower electrodes. It is easy to cause the welding conductive line to be too long, so that the welding heat is lost along the busbar, thus affecting the quality of welding products and reducing the qualified rate of welding products

At the same time, since the end of the busbar has multiple busbar grooves, the existing welding electrodes need to undergo repeated welding to complete the welding process, but repeated welding will lead to inconsistent welding effects of each busbar groove and after welding due to The welding surface is not smooth and needs to be reshaped and car washed, which reduces the qualified rate of the product, and the electrode material is repeatedly softened, which seriously deforms the sides, top and front of the busbar. Repeated welding makes the electrode surface prone to deformation and cracking. The life of the electrode is shortened, the frequency of electrode replacement is high, the welding efficiency is low, and the consumption of the electrode is large, which may easily cause the electrode to fall off

Another disadvantage of adopting the corresponding installation of the upper electrode and the lower electrode and conducting electric heating welding on the pressed busbar is that the carrying current of the electrode cannot be reasonably, effectively and evenly distributed to the bottom edges of both sides of the busbar groove and each of the required busbar grooves. In the busbar groove, the solder at the bottom and side of the busbar groove and the soft connection end cannot be guaranteed to be evenly heated and welded. The heat generation of each groove is inconsistent, the welding conditions are greatly different and the connection strength is low, resulting in unstable welding quality and poor quality consistency.

[0004] The existing circuit breaker contact system processing equipment is mostly manual processing, which cannot realize the process of automatic loading, welding, and unloading of busbars and soft connection groups, and cannot realize one-time welding forming, resulting in low processing and welding efficiency , At the same time, the consistency of welding products cannot be guaranteed, which reduces the qualified rate of products

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