A NOVEL TECHNIQUE FOR TENSIONING CIRCULAR SAWS USING INDUCTION HARDENING

使用感应淬火张紧圆锯的新技术

• 批准号: 03452267
• 负责人: NOGUCHI Masami
• 金额: $ 4.61万
• 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 (B)
• 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/en/grant/KAKENHI-PROJECT-03452267/
• 关键词: Circular saw; Tensioning; Induction hardening; Residual stress; 丸鋸; 高周波誘導加熱; 熱処理; 金型

To prevent thermal buckling of a circular saw during sawing, tangential tensile-stresses have been mechanically introduced into the outer zone of a saw and tangential compressive-stresses into the inner zone over a century. This processing is called TENSIONING.We proposed a theory of tensioning by heat treatment that the outer and inner zones should be subjected to tensile and compressive stresses, respectively in the case where the center of a saw evenly heated is cooled first. A pair of dies were designed for press-tempering of a saw and the saw was physically tensioned using induction hardening. Tangential residual-stresses were measured along a radius of the saw by X-ray, and the results revealed that the outer zone of the saw was stressed in tension and the inner zone was stressed in compression. Thus, the experiments successfully proved the theory of tensioning by heat treatment is valid.

为了防止圆锯在锯切过程中发生热屈曲，一个多世纪以来，在圆锯的外区引入了切向拉应力，在内区引入了切向压应力。我们提出了一种热处理拉伸理论，即在均匀加热的锯片中心首先冷却的情况下，外层和内层应分别承受拉应力和压应力。设计了一对模具，用于对锯子进行压力回火，并使用感应淬火对锯子进行物理拉伸。用X射线对锯片半径方向的切向残余应力进行了测量，结果表明，锯片外区为拉应力，内区为压应力。因此，实验成功地证明了热处理拉伸理论的正确性。

项目成果

梅津 二郎,野口 昌巳: "ハンマ-腰入れされた市販丸のこの残留応力" 木材学会誌. 39. (1993)

Jiro Umezu、Masami Noguchi：“带有锤背的市售圆锯的残余应力”，日本木材学会杂志，39。（1993 年）

梅津 二郎,野口 昌巳: "高周波誘導加熱熱処理による丸のこの腰入れ" 木材学会誌. 39. (1993)

Jiro Umezu、Masami Noguchi：“通过高频感应加热热处理安装圆锯的腰部”，日本木在学会杂志 39。（1993 年）