消音缝结构对75Cr1材质圆锯片旋转状态下振动特性的影响  

Influence of Silencing Seam Structure on Vibration Characteristics of Circular Saw Blades Made of 75Cr1 under Rotating Condition

作　　者：秦绪文 王玉奇 王继荣[1] 白硕玮 张华辰 Qin Xuwen;Wang Yuqi;Wang Jirong;Bai Shuowei;Zhang Huache

机构地区：[1]青岛大学机电工程学院

出　　处：《工具技术》2024年第10期75-82,共8页Tool Engineering

基　　金：国家自然科学基金(71701109);山东省自然科学基金(ZR202212020306)。

摘　　要：在锯片基体设计消音缝结构是75Cr1材质圆锯片重要的减振降噪方式。为研究消音缝加工位置对旋转状态下75Cr1材质圆锯片振动特性的作用机理,构建了考虑离心应力影响的75Cr1材质圆锯片模态仿真模型,分别探究了在其基体内部和边缘加工消音缝对旋转模态振型以及固有频率的影响。结果表明:加工基体消音缝后,不易产生驻波共振,模态的固有频率发生分离;加工边缘消音缝后,部分模态振型的阶次顺序发生改变,不利于动态稳定性的模态振型阶次后移;基体内部消音缝的模态分离作用较强,边缘消音缝的模态分离作用较弱。本研究结论对制锯企业面向不同工作转速需求的消音缝优化设计具有一定指导意义。The design of silencing seam structure in the saw blade substrate is an important way to reduce vibration and noise of 75Cr1 circular saw blades.In order to investigate the mechanism of the silencing seam machining position on the vibration characteristics of 75Cr1 circular saw blades under the rotating state,a modal simulation model of 75Cr1 circular saw blades considering the influence of centrifugal stress is constructed,and the effects of machining silencing seams on the rotational mode shapes and the intrinsic frequency of the rotating modes are investigated in the inner part of the saw blade substrate and at the edge of the saw blade.The results show that after machining the internal silencing seams,standing wave resonance is not easy to be generated,and the intrinsic frequencies of the modes are separated.After machining the edge silencing seams,the order sequence of some modal vibration patterns is changed,and certain mode shapes that are not conducive to dynamic stability are shifted back.The modal separation of the internal silencing seams of the substrate is stronger,and the mode separation of the edge silencing seams is weaker.The conclusions of the study are of some significance in guiding the saw makers to optimize the design of silencing seams for different working speed requirements.

关 键 词：圆锯片 消音缝 离心应力 振动特性分析 

分 类 号：TG717[金属学及工艺—刀具与模具] TH16[机械工程—机械制造及自动化]