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On tool stresses in cold heading of fasteners
Industrial Development Centre, Olofström, Sweden.ORCID iD: 0000-0001-8542-9006
1999 (English)In: Engineering Failure Analysis, ISSN 1350-6307, E-ISSN 1873-1961, Vol. 6, no 5, 321-335 p.Article in journal (Refereed) Published
Abstract [en]

In this investigation, attention was focused on the tool stresses that emerge during manufacturing of fasteners. These stresses were studied both experimentally and theoretically. The theoretical part comprised finite-element simulation. This simulation showed that the zone at the die insert profile radius is so heavily loaded that plastic deformation is initiated in this region. In the experimental part, the emerging strains were measured in the region close to the interface between the die insert and the stress ring. The correspondence is good between the theoretical and experimental strains in this region. In spite of this and although 20 fasteners were cold-forged, the die insert did not fracture. Forming at production facilities showed that the die insert cracked after 9080 parts were produced. The results obtained in this investigation and the test conducted at production facilities indicate that high cycle fatigue, and not monotomic rupture, is the main cause of tool fracture in practice.

Place, publisher, year, edition, pages
Elsevier, 1999. Vol. 6, no 5, 321-335 p.
Keyword [en]
cold forging; heading; fasteners; tool stresses; finite-element analysis; fatigue
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:oru:diva-55302DOI: 10.1016/S1350-6307(98)00050-8ISI: 000082109200003Scopus ID: 2-s2.0-0032726304OAI: oai:DiVA.org:oru-55302DiVA: diva2:1071246
Available from: 2017-02-03 Created: 2017-02-03 Last updated: 2017-03-09Bibliographically approved

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CiteExportLink to record
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Cite
Citation style
  • apa
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