| Project/Area Number |
12660149
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
林産学
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| Research Institution | NAGOYA UNIVERSITY |
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Principal Investigator |
YOKOCHI Hideyuki Graduate School of Bioagricultural Sciences NAGOYA UNIVERSITY Associate Professor, 大学院・生命農学研究科, 助教授 (60124723)
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| Co-Investigator(Kenkyū-buntansha) |
TUCHIKAWA Satoru Graduate School of Bioagricultural Sciences NAGOYA UNIVERSITY Professor Research associate, 大学院・生命農学研究科, 助手 (30227417)
KIMUA Shiro Graduate School of Bioagricultural Sciences NAGOYA UNIVERSITY Professor, 大学院・生命農学研究科, 教授 (30023443)
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| Project Period (FY) |
2000 – 2001
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| Project Status |
Completed (Fiscal Year 2001)
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| Budget Amount *help |
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2001: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2000: ¥3,100,000 (Direct Cost: ¥3,100,000)
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| Keywords | circular saw / wood cutting / thermal buckling / friction heat / Concentric Circular Grooves, / natural freqeuncy / thin disc / temperature distribution. |
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| Research Abstract |
During rip-sawing of a lumber, the sawn lumber sometimes contacts resistant on the surface of circular saw-blade and the temperature on the saw-blade increases by the friction. The radial temperature distribution induces thermal buckling of saw-blade, then sawing can not be continued. In this study, the new designed surface of the saw-blade is made for the purpose that the emperature of saw-blade is not increase, even if lumber contacts resistant on the saw-blade. The section of concentric circular groove is triangular form. The temperature rise speed by the friction became gentle due to concentric circular grooves when the lumber was resistant pressed against the surface of rotating circular saw resistant instead of the contact of the rotating circular saw and the lumber in sawing.
It was effective to suppress the friction heat by forming the concentric circular grooves that the cross section was triangular on circular saw-blade surfaces.
As the increase of groove depth, the contact area (land width B) became smaller, and the temperature rise decreased, and it was effective in view of the friction heat control. However, the natural frequency became lower as the increase of groove depth, and it was not desirable that groove was very much deepened in view of the rigidity.
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