A plasma wire cutting method and cutting device

Abstract

The invention relates to a plasma line cutting method and a cutting device. A plasma cutting line with a diameter of 2-10 mm is connected to a negative pole of an electric arc controller, a cut metal piece is connected to a positive pole of the electric arc controller, the striking voltage ranges from 2000 V to 4000 V, the maintaining voltage ranges from 100 V to 200 V, and a high-temperature plasma electric arc is pulled up between the plasma cutting line and the cut metal piece to bombard the cut metal piece to enable part of the cut metal piece to be melted and even burned; meanwhile, air is blown in through an air nozzle to remove melted metal, the plasma cutting line moves according to a preset route and continuously conducts the melting and metal removing processes, and the cutting for the cut metal piece is achieved. According to the plasma line cutting method and the cutting device, organic combination between the plasma cutting and the line cutting method is achieved, the high-temperature plasma electric arc is pulled up on the surface of the metal piece directly by the energizing between the plasma cutting line and the metal piece, and the melted metal is removed in time through the air nozzle, and the plasma cutting line can perform high-speed cutting with large depth on the metal piece.

Description

Technical field [0001] The invention relates to the technical field of metal cutting and forming, in particular to a plasma wire cutting method and cutting device that can realize high-speed and deep cutting. Background technique [0002] The current metal electric cutting methods include plasma cutting, wire electric discharge cutting and electrolytic corrosion cutting, among which plasma cutting can achieve high-speed cutting, but because the plasma arc and gas are ejected from the cutting nozzle, and the nozzle and the workpiece are cut The surface must be kept at a certain distance, and the depth of the cutting operation cannot be completed due to the limitation of the length of the plasma arc generated. Therefore, plasma cutting is mainly used for cutting metals with small thickness. However, wire EDM and electrolytic corrosion cutting cannot achieve high-speed cutting. Summary of the invention [0003] The invention provides a plasma wire cutting method, which organically c...

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Problems solved by technology

[0002] The current metal electric cutting methods include plasma cutting, wire electric discharge cutting and electrolytic corrosion cutting, etc. Among them, plasma cutting can realize high-speed cutting, but because its plasma arc and gas are ejected from the cutting nozzle, and the nozzle and the workpiece to be cut The surface must be kept at a certain distance, and the deep cutting operation cannot be completed due to the limitation of the length of the plasma arc generated by it. Therefore, plasma cutting is mainly used for cutting metals with small thickness.

However, wire electric discharge cutting and electrolytic corrosion cutting cannot achieve high-speed cutting

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