Numerical simulation of laser drilling and electrochemical machining of metal micro-hole

Sun, Aixi; Chang, Yubo; Liu, Hongjun

doi:10.1016/j.ijleo.2018.11.156

Cited by 7 publications

(1 citation statement)

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“…However, traditional machining is difficult to machine microstructures in high temperature resistant cemented carbides. Electrical discharge machining [ 6 , 7 ] and laser machining [ 8 , 9 ] will form the hot recast layer and micro-cracks on the metal surface. These methods will affect the accuracy and stability of holes machining.…”

Section: Introductionmentioning

confidence: 99%

Research on Multi-Physics Coupling Simulation for the Pulse Electrochemical Machining of Holes with Tube Electrodes

Cao

Dai

2021

Micromachines

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Electrical parameters of the power supply are significant factors affecting the accuracy and stability of the electrochemical machining (ECM). However, the electric field, flow velocity and temperature in the machining area are difficult to measure directly under the influence of the power supply. Therefore, taking the film cooling hole as an example, the multi-physics coupling simulation analysis of the ECM is performed on the basis of Faraday’s law and fluid heat transfer mathematical model. The machining characteristics of the direct current and pulse ECM are compared through simulation. The results show that the pulse ECM improves the distribution of temperature and current density in the machining area. The period has little effect on the temperature, current density and side removal rate. The side removal rate increases with the increase of the duty ratio and lateral gap. Increasing of the duty ratio and decreasing of the lateral gap will increase the temperature and current density. Increasing the inlet pressure accelerates the frequency of renewal of heat and electrolysis products, which can reduce the single side gap. The experience of the ECM holes verifies the results of the simulation. The accuracy and stability of the ECM of holes are enhanced by optimizing the duty ratio, lateral gap and inlet pressure.

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