高速往复运动薄板拉折成型机疲劳分析  

Fatigue Analysis of High一speed Reciprocating Sheet Stretch Forming Machine

作　　者：赵杰[1] 刘立恒 高尚 张雪峰 田成富 陈亚[1] ZHAO Jie;LIU Liheng;GAO Shang;ZHANG Xuefeng;TIAN Chengfu;CHEN Ya(College of Mechanical Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China;School of Mechanical Engineering,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]北京石油化工学院机械工程学院,北京102617 [2]北京化工大学机械工程学院,北京100029

出　　处：《机械设计与研究》2019年第6期212-216,共5页Machine Design And Research

基　　金：北京市自然科学基金资助项目(L182041)。

摘　　要：工业生产中,薄板拉折成型机需要高速往复和无间歇的运动特性,致使机构运动副间易磨损出现间隙问题,在交变载荷作用下会加剧疲劳断裂事故丝发生,对此本文提出一种基于迈因纳线性疲劳累计损伤准则的疲劳分析及寿命预测方法。首先,通过动力学分析得到机构最危险工况,并提取该工况下机构最大受力。依此静力学分析得到机构最大应力及最大变形,检验机构强度及刚度性能的同时并为疲劳分析建立条件。在此基础上,基于迈因纳线性疲劳累计损伤准则得到机构循环次数谱,结合Q235材料的疲劳评定标准,判定机构符合疲劳设计要求。投产工程使用,机构连续运行一年未出现故障,证明了该方法的合理性,并能为工程中对薄板成型设备进行疲劳寿命分析提供参考。Sheet drawing and folding machines need high一speed reciprocating and non一intermittent motion characteristics in industrial production.That will lead to wear and clearance problems between the motion pairs of the mechanism,and will aggravate the occurrence of fatigue fracture accident under the action of alternating load.This article describes a fatigue analysis and life prediction method which is based on Miner"s linear fatigue cumulative damage criterion.The most dangerous working condition of the mechanism was obtained through dynamic analysis,and the maximum force of the mechanism was extracted.According to the static analysis,the maximum stress and deformation of the mechanism are obtained,and the conditions for fatigue analysis are established while the strength and stiffness properties of the mechanism are tested.On this basis,the cycle frequency spectrum of the mechanism was obtained from the Miner's linear fatigue cumulative damage criterion,and the fatigue strength of the mechanism was determined to meet the design requirements by combining the fatigue evaluation standard of Q235 material.In actual operation,the mechanism has been running for a year without failure,which proves the rationality of the method and provides a reference for fatigue life analysis of sheet forming equipment in engineering.

关 键 词：高速往复 薄板成形 疲劳分析 寿命预测 

分 类 号：TP23[自动化与计算机技术—检测技术与自动化装置]