Outer diameter and surface quality of micro metal tubes in hollow sinking

Takuma Kishimoto, Hayate Sakaguchi, Saki Suematsu, Kenichi Tashima, Satoshi Kajino, Shiori Gondo, Shinsuke Suzuki

Research output: Contribution to journalConference article

Abstract

To clarify deformation behavior of tubes in hollow sinking, the outer diameter and surface quality of the final drawn tubes were evaluated. Copper tubes were drawn for one pass under various drawing conditions (e.g., die reduction, drawing speed ratio, and die half angle) without an inner tool. The result of the experiment indicates the deformation behavior of tubes during hollow sinking. The outer diameter of the drawn tube on the die entrance became less than that of the starting material. Free surface roughening seems to develop on the outer surface of the drawn tube on the die entrance side due to the outer diameter reduction. Therefore, the height deviation in the outer uneven surface of the drawn tube on the die entrance became greater than that of the starting material. The height deviation on the die exit side was less than that on the die entrance side because of the tube deformations subjected by the die. The outer diameter decreased from the die approach end as either the drawing speed ratio or the die half angle increased. The height deviation in the outer uneven surface of the drawn tube on the die exit side became larger as the outer diameter decreased from the die approach end due to free surface roughening.

Original languageEnglish
Pages (from-to)217-223
Number of pages7
JournalProcedia Manufacturing
Volume47
DOIs
Publication statusPublished - 2020
Event23rd International Conference on Material Forming, ESAFORM 2020 - Cottbus, Germany
Duration: 2020 May 4 → …

Keywords

  • Dimension control
  • Hollow sinking
  • Micro forming
  • Tube forming

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Artificial Intelligence

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  • Cite this

    Kishimoto, T., Sakaguchi, H., Suematsu, S., Tashima, K., Kajino, S., Gondo, S., & Suzuki, S. (2020). Outer diameter and surface quality of micro metal tubes in hollow sinking. Procedia Manufacturing, 47, 217-223. https://doi.org/10.1016/j.promfg.2020.04.192