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Effect of pulse current in manufacturing of cardiovascular stent using EDM die-sinking

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Abstract

This paper proves that die-sinking electrical discharge machining (EDM) is an alternative and attractive manufacturing method of producing cardiovascular stent. This study investigates the effect of pulse currents on the material removal rate (MRR), the surface of EDM, and the upper surface of the strut stent. The observed surface characteristics of the strut were surface roughness, recast layer, and the diameter of the crater. The recast layer and crater were analyzed by an optical microscope, and the surface roughness was measured by a surface profilometer. The pulse currents which were used in the manufacturing of stent by die-sinking EDM were 1.5 A/45 μs, 3.0 A/90 μs, 4.5 A/120 μs, and 6 A/150 μs. The experiment shows that the stent is successfully manufactured from minitube AISI 316L by die-sinking EDM. The diameter, length, and thickness of the stent are 4 mm, 20 mm, and 0.3 mm, respectively. The results show that increasing of pulse current will cause the increase of MRR, the thickness of recast layer, the surface roughness, and the crater diameter. The MRR, thickness of the recast layer, surface roughness, and crater diameter are also influenced by the pulse on time. The EDM surface roughness, the average thickness of recast layer, and the diameter of crater are in the range of 3.49–9.53 μm, 17.6–97 μm, and 75.84–276.5 μm, respectively, and the upper surface roughness of the strut is 0.5534 μm. The best quality of the strut is generated from the pulse current 1.5 A/45 μs.

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Change history

  • 02 February 2021

    Springer Nature’s version of this paper was updated to present the correct affiliation 1, Sumetra should be changed Sumatera.

Abbreviations

E e :

energy spark

U e :

voltage

I e :

pulse current

t e :

discharge time

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Funding

This work is supported by the Centre for Innovation of Medical Equipment and Devices (CIMEDs), Department of Mechanical and Industrial Engineering, Faculty of Engineering, Gadjah Mada University, Indonesia.

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Authors and Affiliations

  1. Mechanical Engineering Study Program, Institut Teknologi Sumatera (ITERA), South Lampung, Lampung, 35365, Indonesia

    Eko Pujiyulianto

  2. Mechanical and Industrial Engineering Department, Faculty of Engineering, Universitas Gadjah Mada, Yogyakarta, 55281, Indonesia

    Eko Pujiyulianto &  Suyitno

  3. Center for Innovation of Medical Equipment and Devices (CIMEDs), Universitas Gadjah Mada, Yogyakarta, 55281, Indonesia

    Suyitno

Authors
  1. Eko Pujiyulianto
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  2. Suyitno
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All authors have participated in (a) conception and design, or analysis and interpretation of the data; (b) drafting the article or revising it critically for important intellectual content; and (c) approval of the final version.

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Correspondence to Eko Pujiyulianto or Suyitno.

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Pujiyulianto, E., Suyitno Effect of pulse current in manufacturing of cardiovascular stent using EDM die-sinking. Int J Adv Manuf Technol 112, 3031–3039 (2021). https://doi.org/10.1007/s00170-020-06484-3

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  • DOI: https://doi.org/10.1007/s00170-020-06484-3

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