Thermographic Study on Temperature of Tool-Chip-Work System in Wood Cutting

木材切削刀具-切屑-工作系统温度的热成像研究

• 批准号: 03660173
• 负责人: OKUMURA Shogo
• 金额: $ 1.15万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03660173/
• 关键词: Wood Cutting; Cutting Temperature; Thermography; Type of Chip Formation; Friction Temperature; Numerical Analysis; サ-モグラフィ; 数値計算

In order to examine the thermal behavior of a cutting system, including tool, chip and work, closeup thermal images of the side face of tool, chip and work were obtained using a thermographic device during the orthogonal cutting of mizume (Betula grossa) with a few tools of different clearance and rake angles at a cutting speed of 500 mm/min and at some depths of cut. Furthermore, the tool temperature near the cutting edge in frictional rubbing against wood were numerically calculated for higher sliding speeds of the order of practical cutting speeds.Results are summarized as follows:1. The tool temperature rose rapidly at the beginning of cutting and reached steady states during the cutting of a 50 mm length showing concentric distributions around the cutting edges for the chip formations of Types 0 and II, while it varied periodically for the Type I chip formation due to the cyclic breakage of chips.2. The temperature of chips was uniform along the length of the chips of Type 0 and II and the maximum temperatures appeared on the rake face close to the cutting edge. Chips of Type I, however, showed a distinct temperature rise only at the breaking points.3. It was found from the numerical analysis that the tool temperature must rise several hundreds degrees even in frictional rubbing against wood at practical cutting speeds showing the maximums on the rake face near the cutting edge.

为了检查切削系统（包括刀具、切屑和工件）的热行为，在正交切削 mizume（Betulagrossa）时，使用热成像设备获得了刀具、切屑和工件侧面的特写热图像。在 500 mm/min 的切削速度和某些切削深度下，使用几种不同间隙和前角的刀具。此外，对于实际切削速度量级的较高滑动速度，数值计算了与木材摩擦时切削刃附近的刀具温度。结果总结如下： 1．刀具温度在切削开始时迅速上升，并在切削 50 mm 长度时达到稳定状态，对于 0 型和 II 型切屑形成，刀具温度在切削刃周围呈同心分布，而对于 I 型切屑形成，刀具温度呈周期性变化。 2． 0型和II型切屑的温度沿切屑长度均匀，最高温度出现在靠近切削刃的前刀面上。然而，I 型芯片仅在断裂点处表现出明显的温升。3．数值分析发现，即使在实际切削速度下与木材发生摩擦，刀具温度也必须上升数百度，在切削刃附近的前刀面上显示出最大值。