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Profile Punching of High Strength Stainless Sheets
Karlstad University, Faculty of Technology and Science. (Department of Material Engineering)
2011 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

 

Profile punching is a subject of interest to the market and research. The need to produce complex shapes has raised the interest of tool manufacturers to investigate suitable tool geometries along with suitable tool and sheet material combinations. Stainless steel is a tribologically demanding material for punching operations. Chipping of punches is a major challenge in punching of stainless sheets, and sharp corner radii in profile punches are favorable sites for chipping. In severe cases, a complete failure of the tool can occur.

Meanwhile, higher requirements on weight reduction and lower cost are driving the interest in high strength stainless material for many applications, and guidelines for punching of different types of stainless steels are demanded.

The main objectives of this experimental study is the compatibility of punch and sheet material combinations for square punching of stainless steel. The results are based upon a relative comparison of chipping and wear mechanisms occurring in the punches. The amount of chipping in the punches is correlated to the mechanical properties of punch and sheet materials.

The obtained results show that the mechanical properties of the punch and sheet materials govern the amount of chipping. Punch materials used were Vanadis 4Extra, Vancron 40 and Vanadis 23 tool steels from Uddeholm. Sheet materials tested were AISI 304, AISI 316L and LDX 2101 having thicknesses of 1.5 mm, 1.45 mm and 1.47 mm respectively. Vancron 40 punches having corner radii 0.2 mm and 0.5 mm used with a combination of AISI 316L and LDX 2101 suffered premature fatigue failure. High amount of wear was observed in punches used with AISI 304 sheet. The results also show that 0.5 mm corner radii for square punches showed less amount of chipping than 0.2 mm corner radii for all punch/sheet material combinations.

Place, publisher, year, edition, pages
2011. , 97 p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kau:diva-8382Local ID: MSK-20OAI: oai:DiVA.org:kau-8382DiVA: diva2:442762
Subject / course
Materials Engineering, Master of Science
Presentation
2011-06-22, Karlstad University, Sweden, Karlstad, 13:36 (English)
Uppsok
Technology
Supervisors
Examiners
Available from: 2011-09-30 Created: 2011-09-22 Last updated: 2015-11-09Bibliographically approved

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
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