Investigation of flow fields during the electrochemical machining of variable-section pit arrays

被引:8
|
作者
Zhang, Chuanyun [1 ]
Zhang, Yongjun [1 ,2 ]
Chen, Xiaolei [1 ,2 ]
Yao, Jialu [3 ]
Li, Junfei [1 ]
Su, Guokang [1 ]
Zhao, Rongli [1 ]
机构
[1] Guangdong Univ Technol, Sch Electromech Engn, Guangzhou 510006, Guangdong, Peoples R China
[2] Guangzhou Key Lab Nontradit Machining & Equipment, Guangzhou 510006, Guangdong, Peoples R China
[3] Guangdong Univ Technol, Sch Mat & Energy, Guangzhou 510016, Guangdong, Peoples R China
基金
中国国家自然科学基金;
关键词
Electrochemical machining (ECM); Variable-section pit arrays (VSPAs); Radial internal fluid supply; Flow field simulation; BIPOLAR PLATES;
D O I
10.1016/j.jmatprotec.2019.116380
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Variable-section pit arrays play an important role on the linear cutter staplers, which are used for surgical suturing. Although numerous methods can be employed to generate pits on the surface of a workpiece, it remains a challenge to form variable-section pit arrays on the surfaces of thin-walled workpieces with high precision and efficiency. Thus, this paper proposes a method for the electrochemical machining of variable-section pit arrays using a radial internal fluid supply. By using simulations and experiments to investigate the flow fields of the electrolyte, it was found that electrolyte supplied by internal electrodes enhanced the accuracy and consistency of the pit profiles. The influence of the electrolyte pressure, pulse current, and feeding speed on the pit profiles of machined variable-section pit arrays was analyzed. To fabricate the designed pit (length = 1750 +/- 20 mu m, width = 1000 +/- 20 mu m, and depth = 400 +/- 10 mu m), the machining parameters were optimized. Using these optimized parameters (electrolyte pressure = 0.5 MPa, pulse current = 35 A, feeding speed = 0.42 mm min(-1)), ten rows of variable-section pit arrays were generated on a 17-4PH stainless steel plate with a thickness of 1 mm. The resulting length, width, and depth (mean +/- SD) were 1750.56 +/- 0.55 mu m, 999.62 +/- 0.63 mu m, and 396.71 +/- 0.53 mu m, respectively, demonstrating the high precision and efficiency of the proposed method.
引用
收藏
页数:12
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