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Investigation of tool wear mechanisms in CGI machining
Chalmers University of Technology, Department of Materials and Manufacturing Technology.
KTH, Skolan för industriell teknik och management (ITM), Industriell produktion, Maskin- och processteknologi.
Chalmers, Dept Mat & Mfg Technol.
KTH, Skolan för industriell teknik och management (ITM), Industriell produktion, Maskin- och processteknologi.
2011 (Engelska)Ingår i: International Journal of Mechatronics and Manufacturing Systems, ISSN 1753-1039, Vol. 4, nr 1, s. 3-18Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

In this study, the tool wear, including wear mechanisms on coated cemented carbide inserts were investigated in the turning of Compacted Graphite Iron (CGI) materials with varying nodularity. The results showed that increasing nodularity, in the range of 5–62%, affects wear at moderate and high cutting speeds without having the same impact at lower cutting speeds. A small difference in nodularity, in the lower range, such as an increase from 5% to 20%, has a more significant impact on wear than an increase from 20% to 62%.

Ort, förlag, år, upplaga, sidor
Inderscience publisher , 2011. Vol. 4, nr 1, s. 3-18
Nyckelord [en]
CGI machining, compacted graphite iron, turning, tool wear mechanisms, coated cemented carbides, nodularity, cutting speeds
Nationell ämneskategori
Produktionsteknik, arbetsvetenskap och ergonomi
Forskningsämne
SRA - Produktion
Identifikatorer
URN: urn:nbn:se:kth:diva-28344DOI: 10.1504/IJMMS.2011.037996Scopus ID: 2-s2.0-78651277529OAI: oai:DiVA.org:kth-28344DiVA, id: diva2:386888
Forskningsfinansiär
XPRES - Initiative for excellence in production research
Anmärkning
QC 20110114Tillgänglig från: 2011-01-13 Skapad: 2011-01-13 Senast uppdaterad: 2012-06-19Bibliografiskt granskad
Ingår i avhandling
1. 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

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Berglund, AndersNicolescu, Cornel Mihai
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Produktionsteknik, arbetsvetenskap och ergonomi

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