Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Analysis of compacted graphite iron machining by investigation of tool temperature and cutting force
KTH, Skolan för industriell teknik och management (ITM), Industriell produktion.
KTH, Skolan för industriell teknik och management (ITM), Industriell produktion.
2008 (Engelska)Ingår i: 1st International Conference on Process Machine Interactions: Hannover, Germany, 2008Konferensbidrag, Publicerat paper (Övrigt vetenskapligt)
Ort, förlag, år, upplaga, sidor
2008.
Serie
Trita-IIP, ISSN 1650-1888 ; 08-08
Nyckelord [en]
Compacted Graphite Iron (CGI), cutting temperature, nodularity, FEM, cutting force
Nationell ämneskategori
Produktionsteknik, arbetsvetenskap och ergonomi
Identifikatorer
URN: urn:nbn:se:kth:diva-25921ISBN: 978-3-939026-95-2 (tryckt)OAI: oai:DiVA.org:kth-25921DiVA, id: diva2:360795
Anmärkning
QC 20101104Tillgänglig från: 2010-11-04 Skapad: 2010-11-04 Senast uppdaterad: 2011-11-21Bibliografiskt granskad
Ingår i avhandling
1. Characterization of factors interacting in CGI machining: machinability - material microstructure - material physical properties
Öppna denna publikation i ny flik eller fönster >>Characterization of factors interacting in CGI machining: machinability - material microstructure - material physical properties
2008 (Engelska)Licentiatavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

The Swedish truck industry is forced to find new material solutions to achieve lighter engines with increased strength. Customers and new environmental regulations demand both higher specific power and more environmentally friendly trucks, and this places a rising pressure on the manufactures. This demand could be met by increasing the peak pressure in the cylinders. Consequently, a more efficient combustion is obtained and the exhaust lowered. This however exposes the engine to higher loads and material physical properties must therefore be enhanced.

Today, alloyed gray iron is the predominantly used engine material. This material cannot meet the requirements of tomorrow’s engines. Compacted Graphite Iron has good potential to be the replacement; it opens new design opportunities with its superior strength, which can lead to smaller, more efficient engines and additional power. The question is: how will manufacturing be affected?

The main goal of this thesis is to identify and investigate the main factors’ effect and their individual contributions on CGI machining.  When the relationship between the fundamental features; machinability, material microstructure, and material physical properties, are revealed, then the CGI material can be optimized, both regarding the manufacturing process and design requirements. The basic understanding is developed mainly through experimental analysis. No attempt has been made to optimize the material to be used as engine material in this thesis.

The thesis demonstrates the importance of having good casting process control. It also illustrates the microstructural properties’ effects on CGI machinability, and what new aspects of machining must be taken into account, compared to gray iron.

Ort, förlag, år, upplaga, sidor
Stockholm: KTH Royal Institute of Technology, 2008. s. ix, 43
Serie
Trita-IIP, ISSN 1650-1888 ; 08-11
Nyckelord
CGI, Compacted Graphite Iron, milling, cast iron, machinability, material microstructure, material physical properties, CGI, kompaktgrafitjärn, fräsning, gjutjärn, skärbarhet, mikrostruktur, materialegenskaper
Nationell ämneskategori
Produktionsteknik, arbetsvetenskap och ergonomi
Identifikatorer
urn:nbn:se:kth:diva-9258 (URN)978-91-7415-158-9 (ISBN)
Presentation
2008-11-14, M311, Brinellsalen, Brinellvägen 68, Stockholm, 10:00 (Svenska)
Opponent
Handledare
Projekt
OPTIMA CGI
Anmärkning
QC 20101105Tillgänglig från: 2008-11-07 Skapad: 2008-10-14 Senast uppdaterad: 2011-05-19Bibliografiskt granskad
2. Criteria for Machinability Evaluation of Compacted Graphite Iron Materials: Design and Production Planning Perspective on Cylinder Block Manufacturing
Öppna denna publikation i ny flik eller fönster >>Criteria for Machinability Evaluation of Compacted Graphite Iron Materials: Design and Production Planning Perspective on Cylinder Block Manufacturing
2011 (Engelska)Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
Abstract [en]

The Swedish truck industry is looking for new material solutions to achieve lighter engines with increased strength to meet customer demands and to fulfil the new regulations for more environmentally friendly trucks. This could be achieved by increasing the peak pressure in the cylinders. Consequently, a more efficient combustion is obtained and the exhaust lowered. This, however, exposes the engine to higher loads and material physical properties must therefore be enhanced. One material that could meet these demands is Compacted Graphite Iron (CGI). Its mechanical and physical properties make it ideal as cylinder block material, though there are drawbacks concerning its machinability as compared to other materials that are commonly used for the same purpose. Knowledge about machining of the material and its machinability is consequently inadequate.

The main goal of this thesis is to identify and investigate the effect of the major factors and their individual contributions on CGI machining process behaviour. When the relationship between the fundamental features; machinability, material microstructure, and material physical properties, are revealed, the CGI material can be optimized, both regarding the manufacturing process and design requirements. The basic understanding of this is developed mainly through experimental analysis as, e.g., machining experiments and material characterization.

The machining model presented in this thesis demonstrates the influence of material and process parameters on CGI machinability. It highlights machinability from both design and production planning perspectives. Another important objective of the thesis is an inverse thermo−mechanical FE model for intermittent machining of CGI. Here, experimental results obtained from a developed simulated milling method are used as input data, both to calibrate and validate the model. With these models, a deeper understanding is obtained regarding the way to achieve a stable process, which is the basis for future optimization procedures. The models can therefore be used as a foundation for the optimization of CGI component manufacturing.

Ort, förlag, år, upplaga, sidor
Stockholm: KTH Royal Institute of Technology, 2011. s. xiii, 75
Serie
TRITA-IIP, ISSN 1650-1888 ; 2011-10
Nyckelord
Metal Cutting, Compacted Graphite Iron (CGI), Machinability, Design of Experiments (DoE), Inverse Finite Element (FE) Modelling, Simulated Milling Method
Nationell ämneskategori
Produktionsteknik, arbetsvetenskap och ergonomi
Forskningsämne
SRA - Produktion
Identifikatorer
urn:nbn:se:kth:diva-48430 (URN)978-91-7501-159-2 (ISBN)
Disputation
2011-12-02, F3, Lindstedtsväg 26, KTH, Stockholm, 09:00 (Engelska)
Opponent
Handledare
Projekt
MERA - OPTIMA CGIFFI - OPTIMA phase two
Forskningsfinansiär
XPRES - Initiative for excellence in production research
Anmärkning

QC 20111121

Tillgänglig från: 2011-11-21 Skapad: 2011-11-18 Senast uppdaterad: 2017-05-23Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Sök vidare i DiVA

Av författaren/redaktören
Berglund, AndersNicolescu, Cornel Mihai
Av organisationen
Industriell produktion
Produktionsteknik, arbetsvetenskap och ergonomi

Sök vidare utanför DiVA

GoogleGoogle Scholar

isbn
urn-nbn

Altmetricpoäng

isbn
urn-nbn
Totalt: 433 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf