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浙江大学学报(工学版)
浙江大学学报(工学版)
机械与能源工程     
内孔拉削动态负载计算模型
倪敬, 顾瞻华, 杨肖
杭州电子科技大学 机械工程学院,船港机械装备与技术省重点实验室,浙江 杭州 310018
Dynamic load computing model for inner hole broaching
NI Jing, GU Zhan-hua, YANG Xiao
School of Mechanical Engineering, Key laboratory of Mechanical Equipment and Technology for Marine Machinery, Hangzhou Dianzi University, Hangzhou 310018, China
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摘要：

针对圆孔拉削负载计算误差大、负载动特性预测精度低的问题,综合考虑圆孔的圆弧效应、刀齿的刮削效应以及刀齿与工件接触的周期特性,建立计算和预测拉削负载模型.基于Johnson-Cook模型,对每个刀齿的切削剖面进行详细划分,计算圆弧效应对拉削负载的影响.针对刀具与工件的接触状态,考虑拉削过程中每个刀齿切削与刮削占比不同的效应,进一步优化拉削负载计算模型.考虑刀具与工件接触过程中刀齿数周期变化的特性,将拉削过程分成3个阶段(工件与刀齿接触初期、工件与刀齿完全接触时期以及工件与刀齿脱离时期).仿真和试验结果表明,所建立的拉削负载计算模型能够准确描述拉削负载动特性,平均计算误差小于13%.
Abstract:
A calculating and predicting broaching model was established aiming at the problem that the calculating broaching load of round hole has big error and that the dynamic load has poor predictioin accuracy, in which the circle effect of round hole, scraping effect of cutter and cyclic contact characteristics between cutter and workpiece were synthetically considered. Based on the Johnson-Cook model, circle effect on broaching load was calculated by dividing the cutting profile of each cutter in detail. Moreover, on account of the contact state between cutter and workpiece, the calculating broaching load model was further optimized through regarding cutting and scraping with different proportions of each other in each cutter during broaching process. Considering the cyclic contact characteristics of the cutter teeth number between cutter and workpiece, dynamic broaching load was calculated exactly by dividing broaching process into three phases: the initial contact stage of workpiece and cutter tooth, the complete contact stage of workpiece and cutter tooth, and the separating stage of workpiece and cutter tooth. Simulation and test results show that the proposed model can better predict the characteristic of dynamic broaching load; the average calculation error is less than 13%.
出版日期: 2017-03-01
CLC:  TG 57  
基金资助:

国家自然科学基金资助项目（51375129）
通讯作者: 杨肖，男，讲师. ORCID:0000-0002-9857-2909.     E-mail: yangxiao0431@foxmail.com
作者简介: 倪敬（1979—），男，教授，从事切削系统动特性研究.ORCID: 0000-0003-4973-7241. E-mail: nijing2000@163.com
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引用本文:

倪敬, 顾瞻华, 杨肖. 内孔拉削动态负载计算模型[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008-973X.2017.03.003.

NI Jing, GU Zhan-hua, YANG Xiao. Dynamic load computing model for inner hole broaching. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008-973X.2017.03.003.

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