Avoidance of Thermal Buckling by Forming Concentric Circular Grooves on, Circular Saw-blade Surfaces

通过在圆锯片表面上形成同心圆凹槽来避免热屈曲

• 批准号: 12660149
• 负责人: YOKOCHI Hideyuki
• 金额: $ 2.3万
• 依托单位: NAGOYA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12660149/
• 关键词: circular saw; wood cutting; thermal buckling; friction heat; Concentric Circular Grooves,; natural freqeuncy; thin disc; temperature distribution.

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.

在锯切过程中，锯切材与圆锯片表面的摩擦阻力会使锯片表面的温度升高。径向温度分布会导致锯片热屈曲，从而导致锯切无法继续。本研究以木材与锯片接触阻力不增加锯片温度为目的，设计了新的锯片表面。同心圆槽的截面为三角形。在锯切过程中，木材与旋转圆锯片表面接触，而不是与旋转圆锯片表面接触，由于同心圆槽的存在，木材与旋转圆锯片表面的摩擦温升速度变缓;在圆锯片表面形成截面为三角形的同心圆槽，可以有效地抑制摩擦生热;随着槽深的增加，接触面积（槽脊宽度B）变小，并且温度升高降低，并且从摩擦热控制的角度来看是有效的。然而，固有频率随着槽深度的增加而变低，并且考虑到刚度，不希望槽太深。