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Wednesday 3 January 2018

The influence of technical characteristics of wood milling tools on its wear performance

Author
  1. 1.Department of Production Engineering, Faculty of Mechanical Engineering and DesignKaunas University of TechnologyKaunasLithuania
  2. 2.Department of Materials Engineering, Faculty of Mechanical Engineering and DesignKaunas University of TechnologyKaunasLithuania
Original article

Abstract

Influence of technical and chemical characteristics of industrial wood milling tools on its wear was analysed. Four tools of different manufacturers were subjected to the research. Lithuanian oak wood was chosen for the research as a reference material. Behaviour of cutting tools was assessed on the adopted industrial thickness planer SR3-6 with cutting speed of 31 m/s. Wear performance was evaluated on milling the specimens until 3200 m of true cutting length. Summarising achieved results, the following can be stated: chemical composition of tool and heat treatment schedule has great impact on the tool edge wear. The highest wear resistance was reached on testing tools made of CT01M-LA2; tools made of high-alloyed tool steel 8X6HΦT have presented the highest cutting edge radius and edge recession in each type of test as compared with tools made of high-speed tool steels Z80WCV18-04-01/18-0-1 and HS18-0-1, respectively. All these tools are suitable for oak wood processing. The high-alloyed tool steel shows similar wear performance as high-speed tool steels.

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Copyright information

© The Japan Wood Research Society 2017
For further details logon website :
https://link.springer.com/article/10.1007/s10086-017-1656-x

Changes of major chemical components in larch wood through combined treatment of drying and heat treatment using superheated steam

Author
  • Yonggun Park
    • 1
  • Soo-Kyeong Jang
    • 1
  • Jun-Ho Park
    • 2
  • Sang-Yun Yang
    • 1
  • Hyunwoo Chung
    • 1
  • Yeonjung Han
    • 3
  • Yoon-Seong Chang
    • 3
  • In-Gyu Choi
    • 1
    • 4
    • 5
  • Hwanmyeong Yeo
    • 1
    • 4
  1. 1.Department of Forest Sciences, College of Agriculture and Life SciencesSeoul National UniversitySeoulRepublic of Korea
  2. 2.Materials R&D CenterSamsung SDI Co., LTD.Suwon-siRepublic of Korea
  3. 3.Department of Forest ProductsNational Institute of Forest SciencesSeoulRepublic of Korea
  4. 4.Research Institute of Agriculture and Life SciencesSeoul National UniversitySeoulRepublic of Korea
  5. 5.Institute of Green-Bio Science and TechnologySeoul National UniversityPyeongchang-gunRepublic of Korea
Original article

Abstract

The effects of the combined treatment of drying and heat treatment using superheated steam (SHS) were studied relative to the changes of the major chemical components in larch wood. The green lumber was dried and heat-treated in SHS conditions of 250 °C and 0.5 MPa for 18 h, and the relative percentage contents of sugars, lignin, and extractives were investigated and compared with the relative percentage contents in the lumber heat-treated in hot air conditions of 250 °C and atmospheric pressure for 18 h. After both heat treatment methods, the relative percentage contents of xylan, mannan, galactan, and arabinan were greatly decreased, whereas that of the Klason lignin was increased, additionally that of glucan and extractives remained almost unchanged. Lignin may bind with furan compounds decomposed from hemicellulose following heat treatment, thus contributing to the increase in the apparent relative percentage contents of the Klason lignin. In addition, the condensate collected in the condenser after combined drying and heat treatment using SHS was investigated qualitatively and quantitatively by high-performance liquid chromatography (HPLC). A large amount of furfural and acetic acid decomposed from hemicellulose was detected and some sugar components composed of cellulose and hemicellulose were detected in the liquid condensate.

Acknowledgements

This work was financially supported by the Forest Science and Technology Projects (S121315L010100) provided by Korea Forest Service and the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and future Planning (NRF-2015R1D1A1A01060308).

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Copyright information

© The Japan Wood Research Society 2017
For further details log on website :
https://link.springer.com/article/10.1007/s10086-017-1657-9

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