Controllable discharge ablation processing method for flammable and difficult-to-process materials with adjustable combustion-supporting gas concentration

Abstract

The invention provides a controllable discharge ablation method for a combustible difficult-to-process material and with adjustable combustion-supporting gas concentration. The method is characterizedin that a mixed gas medium provided by a special combustion-supporting gas concentration adjustable gas supply device is introduced before processing; during processing, inter-pole voltage required to breakdown the mixed gas medium is supplied to two poles through a pulse power supply, and required energy is provided for melting and gasification of an inter-pole workpiece material; after a metalmaterial forms a high-temperature molten material, the high-temperature molten material and combustion-supporting gas in the mixed gas medium are subjected to a severe oxidation chemical reaction, a large amount of chemical energy is generated, extra ablation energy is introduced for efficient material ablation, and therefore the material removal rate of the combustible difficult-to-process material is improved under the condition that the discharge energy of the pulse power supply is certain. By means of the special gas supply device, the concentration of the combustion-supporting gas participating in the oxidation reaction is controlled, the explosion phenomenon caused by violent combustion in the processing process is avoided, the damage of a machined workpiece is avoided, and controllable and efficient processing of the combustible difficult-to-process material is achieved.

Description

technical field

[0001] The invention relates to a controllable discharge ablation machining method for flammable and difficult-to-machine materials with adjustable combustion-supporting gas concentration. It is a high-efficiency machining method based on conventional electric discharge machining. Controlled, efficient machining of metals. Background technique

[0002] With the rapid development of aerospace, national defense and other fields, more and more new metal materials and structural features have been applied, and the proportion of highly active and difficult-to-process materials such as titanium alloys and magnesium alloys is increasing. Due to the characteristics of high strength and low thermal conductivity, titanium alloys have serious tool wear and low processing efficiency during cutting; magnesium alloys are a kind of metal materials with active chemical properties, which are prone to combustion, deformation and oxidation corrosion during cutting. serious. I...

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