High-voltage circuit breaker contact deburring device and deburring method thereof

Abstract

The invention discloses a high-voltage circuit breaker contact deburring device and a deburring method thereof and belongs to the field of surface treatment. The high-voltage circuit breaker contact deburring device is composed of a magnetic field generation device, a workpiece clamp, a magneto-rheological machining liquid container and a driving device. A DC voltage-stabilized source in the magnetic field generation device controls generated magnetic field intensity, so that machining liquid in the magneto-rheological machining liquid container is subjected to phase change to form a Bingham solid-state flexible abrasive layer. The workpiece clamp is composed of a home-made Mohs cone bar, a flexible diaphragm coupling, an insulating bush and a clamp body. The driving device drives a contact part to be immersed in magneto-rheological machining liquid to rotate at high speed through the workpiece clamp. Under the action of impact and grinding of the machining liquid, burrs on the edges of lobes formed on a contact are removed. The high-voltage circuit breaker contact deburring device is simple in structure, low in manufacturing cost and high in machining efficiency, and has the characteristics of high shape adaptability, high machined surface quality and small surface damage through a magneto-rheological machining method.

Description

technical field [0001] The invention relates to the technical field of surface treatment, in particular to a high-voltage circuit breaker contact deburring device and a deburring method thereof. Background technique [0002] As the core equipment in the power transmission system, the high-voltage circuit breaker is of great significance to the safety and reliability of its operation for the entire power system. As a key component of a high-voltage circuit breaker, the high-voltage circuit breaker contact is responsible for the important task of connecting and disconnecting the circuit and load current during the operation of the circuit breaker. Its working performance directly affects the stability and safety of the high-voltage power transmission system. [0003] The high-voltage circuit breaker contacts as a whole have a rotating body and a thin-walled structure with flaps. However, the problem of burrs on the edges of the flaps of the contacts has always plagued high-vol...

AI Technical Summary

Problems solved by technology

Therefore, in the contact milling process, it often leads to a large number of burrs of different sizes on the edge of the petal groove

The existence of tiny burrs not only affects the quality of the silver plating on the surface of the contacts, but also affects its electrical conductivity. It is more likely to cause local sharp point discharges, resulting in equipment insulation failure, breakdown of the vacuum interrupter, and contact failure.

Once the high-voltage circuit breaker contacts fail, it may directly lead to the explosion of the circuit breaker, and then cause a serious accident of large-scale power outage. The direct or indirect impact and economic loss caused by this are incalculable

[0004] Patent CN201320634566.0 discloses a semi-automatic deburring machine, which allows pins to penetrate through holes on the circuit breaker housing, thereby removing burrs on the circuit breaker housing, but the pins are easily damaged, and the burr removal consistency is relatively low. Difference

Invention patent CN201310734376.0 discloses a mixed powder for quickly removing the punching burrs of sheet-shaped electric contacts and its use method. The electric contact blank and the mixed powder are put into a centrifugal grinder for grinding, and then pickled with dilute sulfuric acid. , ultrasonic cleaning, and then drying, drying, and cooling to the finished product. The whole process is very cumbersome and not suitable for actual production

[0005] Aiming at the problem of burrs on the opening edge of the contact, most high-voltage circuit breaker manufacturers still rely on the manual grinding method of operators to deal with it, which will inevitably cause greater cost pressure on the company

The effect and efficiency of removing burrs by manual grinding has a great relationship with the proficiency of the operator, and there are problems of poor consistency, low pass rate and low processing efficiency; in addition, during the deburring process, the removed metal dust is scattered on the In the air, it will damage the health of operators and seriously pollute the surrounding environment

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