Plasma and pulse discharge compound polishing processing method for large complex metal surface
A technology of pulse discharge and metal surface, which is applied in the field of non-contact metal surface processing to achieve the effect of high cost efficiency, high processing efficiency and avoiding environmental pollution
Active Publication Date: 2016-04-20
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology
It will not affect the surface structure of the metal, and there will be no problems such as surface lattice damage, metamorphic layer, residual stress and stress concentration.
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[0076] By controlling the circuit module, the distance between the five-degree-of-freedom series robot arm and the plasma torch and the surface of the metal material to be polished is adjusted to 30mm. The initial adjustment output power of the RF power supply is 100W. In the experiment, a constant plasma is generated under the action of the matching device. The output power of the high-voltage DC pulse power supply is 18KV, the output power is 1200W, the input flow rate of the plasma generating gas is 2L / s, and the electromagnetic field force applied by the electromagnetic oscillation load is 0.2mT. The processing moving speed of the plasma torch is 0.2m / s.
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Abstract
The invention discloses a plasma and pulse discharge composite polishing method for a metal surface. The plasma and pulse discharge composite polishing method for the metal surface comprises the steps that firstly, a plasma magnetofluid channel is generated through radio frequency oscillation; secondly, pulse discharge is conducted on the protruding portion of the metal surface to be polished, and after a generated plasma arc passes through the magnetofluid channel, a plasma arc with improved strength and increased density is obtained; thirdly, the reinforced plasma arc conducts bombardment on the protruding portion of the metal surface, anode spots are formed on the protruding portion, and then the protruding portion is eliminated through evaporation; finally, the position where the protruding portion is eliminated is brightened through adjustment of the discharge polarity, and polishing is achieved at the position. By the adoption of the plasma and pulse discharge composite polishing method for the metal surface, the problems that according to a conventional metal surface polishing method, the machining efficiency is low, machining stress is prone to generation, and the surface is prone to damage are solved, the method can be executed at the atmospheric pressure, rough polishing, fine polishing and precise polishing can be achieved, the situation that the metal surface to be polished is coated with grinding fluid and a chemical reactant is avoided, and the surface roughness existing after precise polishing is small and can reach Ra0.2 micrometer.
Description
technical field [0001] The invention belongs to the technical field of non-contact metal surface processing, and in particular relates to a large complex metal surface plasma and pulse discharge combined polishing processing method, which is used for precise polishing and processing of metal surfaces under atmospheric pressure conditions. Background technique [0002] Surface polishing of metal materials can be divided into contact type and non-contact type. Contact polishing is mainly manual direct grinding and polishing and machining grinding and polishing. These traditional mechanical polishing methods, together with the later developed mechanical-chemical composite polishing, diamond ultra-precision cutting and polishing, etc., all have various disadvantages of traditional contact polishing. Defects will inevitably cause damage to the surface structure of the material, form microcracks, destroy the integrity of the material lattice, and affect the surface quality of the ...
Claims
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IPC IPC(8): B24B1/00
CPCC23F4/00
Inventor 李建军戴伟黄齐文赵航
Owner HUAZHONG UNIV OF SCI & TECH