Novel arc air gouging device

Abstract

The invention relates to a machining tool, in particular to a novel arc air gouging device. The novel arc air gouging device comprises a tungsten-molybdenum alloy electrode tip, a copper pipe body, an upper cover, an upper sealing ring, a lower sealing ring, an air inlet pipe, an air jet pipe and a spiral through pipe. The electrode tip is made of tungsten-molybdenum alloy, the electrode tip is provided with an inner hole in the axial direction, the upper end of the electrode tip is a cylinder, and the lower end of the electrode tip is a cone. The copper pipe body is a cylindrical shell with the top and the bottom open, and external threads are arranged on the outer surfaces of the two ends of the copper pipe body. The upper end of the upper cover is closed, the lower end of the upper cover is open, and an internal thread is arranged on the surface of the inner wall of the upper cover. The spiral through pipe is a hollow spiral through pipe made of copper. The novel arc air gouging device is simple, convenient to use and reliable in sealing; compressed cold air is introduced through the air inlet pipe and circulates in the pipe body, and thus efficient cooling is achieved; as the air jet pipe is adopted to feed air downwards, molten metal generated in the air gouging process can be easily blown away, and a smooth cut surface can be formed; as the tungsten-molybdenum alloy electrode tip is adopted for discharging, high-temperature oxidation is avoided, and a stable arc is formed.

Description

technical field [0001] The invention relates to a machining instrument, in particular to a novel arc gouging device. Background technique [0002] At present, most of the gouging devices on the market are carbon arc gouging devices, and a small amount are copper-tungsten gouging devices. The carbon arc gouging device consumes carbon rod electrodes, and the copper-tungsten gouging device is cooled by circulating water flow. Both devices have the following disadvantages: [0003] 1. The carbon rod electrode has a short service life and generates serious dust; [0004] 2. The arc generated by the carbon electrode is unstable and the divergence is high, and the planing groove is not smooth. [0005] 3. The pure tungsten electrode head of the copper-tungsten gouging device is easy to oxidize at high temperature, and the arc concentration is poor. [0006] 4. The copper-tungsten gouging device is cooled by circulating water, and the electrode head will be sealed and damaged af...

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Problems solved by technology

[0004] 2. The arc generated by the carbon electrode is unstable and the divergence is high, and the planing groove is not smooth

[0005] 3. The pure tungsten electrode tip of the copper-tungsten gouging device is easy to oxidize at high temperature, and the arc concentration is poor

[0006] 4. The copper-tungsten gouging device is cooled by circulating water. After long-term use, the electrode tip will be melted and the seal will be damaged, which will easily cause high-pressure water leakage and affect production safety.

[0007] 5. The overall weight of the copper-tungsten gouging device is large, and the operator has a large load, which is laborious

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