Development of under-cut shape sprocket forming by CNC press

Takayuki Hirao, Akira Fujiki, Masaki Saitou, Shunzou Umegaki, Takeshi Katagiri

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


In standard P/M (Press-Sinter) technique, it is difficult to make under-cut shape parts. In this development, undercut shape sprocket of whole circumference is made by CNC press and new designed die and tools. This paper describes the details of this development. 1) Features of CNC press and new designed die and tools for under-cut shape compacting. 2) How to eliminate cracks and barrs of this under-cut shape parts. 3) How to achieve the even density of this complex parts. 4) How to keep the dimensional tolerance of this parts.

Original languageEnglish
Pages (from-to)548-553
Number of pages6
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Issue number5
Publication statusPublished - 1999 May
Externally publishedYes

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry


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