带锯动态锯切负载建模与验证

摘要/Abstract

摘要：

针对现有带锯的锯切负载模型误差较大且无法预测动态特性等问题，将锯切负载特性分为稳态特性和动态特性进行研究。引入锯齿的锯削与刮削并存原理和斜锯齿等效原理，提出等齿距工况下单个锯齿的锯切负载稳态特性模型;引入锯切进给过程的微位移等效原理，优化锯切负载的锯削部分负载动特性;引入套齿周期特性和锯带传动的周期特性，建立了变齿距工况下单锯齿锯切负载的动特性模型。结果表明，单齿、套齿以及锯带传动的周期特性与实验结果吻合，并且3个主要锯切负载频率的误差不超过4%，因此，提出的模型可以较好地预测实际锯切负载动态特性。

关键词: 锯切负载, 动态特性, 刮削, 套齿周期, 锯带传动周期

Abstract:

According to the problems that the existing models on cutting load characteristics of band sawing process could not predict the dynamic characteristics, the cutting load characteristics was studied by dividing into steady state characteristics and the dynamic characteristics herein. Firstly, the single sawtooth cutting load model of steady state characteristics under the conditions of equal tooth pitch was built by introducing the cutting and scraping coexist principle and inclined sawtooth equivalent principle. Furthermore, the dynamic characteristics of cutting load was optimized by introducing micro-displacement equivalent principle during the feeding process. Finally, the cycle characteristics of a set of sawtooth and bandsaw transmission was introduced, and the single tooth cutting load dynamic model was proposed under the conditions of variable tooth pitch. Comparison of simulation and experimental results shows that the cycle characteristics of the single tooth, a set of tooth and bandsaw transmission coincide with the experimental results. The error of three important frequencies between simulation and experimental results is less than 4%. Therefore, the proposed model can better predict the actual cutting load characteristics.

Key words: cutting load, dynamic characteristics, scraping;teeth set cycle, band transmission cycle

中图分类号:

TG56

倪敬, 李璐, 许静, 吴参. 带锯动态锯切负载建模与验证[J]. 中国机械工程, 2016, 27(03): 302-307,314.

Ni Jing, Li Lu, Xu Jing, Wu Can. Modeling and Verification on Cutting Load Dynamics of Band Saw[J]. China Mechanical Engineering, 2016, 27(03): 302-307,314.

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