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論文 |
論文
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細川, 晃 ; 南部, 彰 ; 田中, 隆太郎 ; 山田, 啓司 ; 上田, 隆司 ; Hosokawa, Akira ; Nambu, Akira ; Tanaka, Ryutaro ; Yamada, Keiji ; Ueda, Takashi
概要:
金沢大学理工研究域機械工学系<br />前報では光ファイバ型2色温度計を用いてエンドミル加工におけるオイルミスト供給時の工具逃げ面温度を測定し,ミスト粒径,ミスト流量,ミスト供給位置が工具逃げ面温度に及ぼす影響について検討した.本報では,そ
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の第3段階として,超硬工具およびコーティング工具における切削温度と工具損耗量を測定し,オイルミスト供給が工具損耗形態に及ぼす影響について詳細に検討している.<br />出版者照会後に全文公開
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論文 |
論文
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細川, 晃 ; 周, 智鵬 ; 山田, 啓司 ; 上田, 隆司
概要:
A new three-color infrared radiation pyrometer using an optical fiber is developed for measuring cutting temperature in
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high speed machining by small ball end mill. The high speed air spindle unit is adopted to the ordinary milling machine so that the maximum spindle revolution of 40000rpm is attainable. The ball radius of the carbide cutter is 3mm and the side cutting of carbon steel with ballnose is executed without cutting fluid. Cutting temperature distribution along the ball-nosed cutting-edge is measured. The influences of spindle rotational speed, radial depth of cut and feed per tooth on the temperature distribution at the flank face are examined. The maximum temperature of peripheral cutting edge about 700°C is obtained even at the rotation angle of 180° after cutting, and it drops along the ballnose toward the ball tip. Relatively large temperature gradient arises along the ball cutting-edge at higher spindle revolution because cutting speed depends on the local tool radius. Depth of cut and feed per tooth, at the same time, affect the overall temperature at the ball cutting edges. The cooling characteristics in air cutting reveals that the temperature difference during one cycle of intermittent cutting increases as spindle speed decreases. The relationship between the peripheral cutting speed and the tool temperature varies from tool shank to ball tip because the interactions between cutting edge and workpiece change along the ballnose.
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論文
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Al Huda, Mahfudz ; 山田, 啓司 ; 上田, 隆司
概要:
The temperature of the flank side of the cutting tool edge that has large affect on machined surface integrity is measur
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ed using two-color pyrometer with a fused fiber coupler. The infrared rays radiated from the cutting tool edge are accepted by an optical fiber, and separated to two optical fibers at the fused fiber coupler. Each fiber leads the infrared ray, respectively, to two infrared detectors with different characteristic of spectral sensitivity. Temperature is obtained by calculating the ratio of the output voltage from these two detectors. A CBN tool (CBN content : 60 volume percent, density : 3000 kg/mm2) is used as the cutting tool. Annealed steel (S45C), bearing steel (SUJ2), and quenched steel (S55C) are used as the cutting materials to investigate their affect on the tool edge temperature. The results obtained are as follows : (1) The technique developed is suitable for measuring the temperature of the flank side of the cutting tool edge. (2) The temperature of the cutting tool edge is highly effected by cutting speed. (3) The temperature increases slightly with the increase of depth of cut and feed rate. (4) On the cutting of quenched steel which has the largest hardness among these three materials, the temperature is about 50°C higher than that on the bearing steel cutting, and the temperature of the annealed steel cutting is the lowest.
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