Finite Element Analysis of Welded Excavator Bucket under Different Loading Modes

Anmin LIU; Guoxing LIU; Yiming MA; Jie XU; Yu FAN

doi:10.7512/j.issn.1001-2303.2022.08.07

Important Issuse | Views : 0 下载量: 1694 CSCD: 0

PDF
Export
Share
Collection
Album

Finite Element Analysis of Welded Excavator Bucket under Different Loading Modes
Vol. 52, Issue 8, Pages: 50-56(2022)
Received：03 January 2022，

Revised：2022-03-30，

Published：25 August 2022
DOI： 10.7512/j.issn.1001-2303.2022.08.07
稿件说明：

移动端阅览

柳岸敏，刘国兴，马一鸣，等.挖斗焊接结构不同载荷方式下受力有限元分析［J］.电焊机，2022，52（8）：50-56. DOI： 10.7512/j.issn.1001-2303.2022.08.07.

LIU Anmin, LIU Guoxing, MA Yiming, et al.Finite Element Analysis of Welded Excavator Bucket under Different Loading Modes[J].Electric Welding Machine, 2022, 52(8): 50-56. DOI： 10.7512/j.issn.1001-2303.2022.08.07.

摘要

采用UG三维造型软件建立了某型号挖掘机挖斗焊接结构的三维几何模型，通过导入MSC.Marc和ANSYS Workbench软件，分别针对挖斗关键焊缝焊接过程和挖斗齿端在不同载荷工况下的受力进行有限元模拟计算与分析。基于挖掘机在挖掘过程中不同斗齿参与受力时的多种工况条件，系统研究了挖斗焊接结构不同工况条件下的应力和变形情况。研究结果表明：支耳关键焊缝区域残余应力较大，且耳板主焊缝上纵向残余应力峰值位于各焊缝的弧焊段；五齿均匀受力时，该型号挖斗满足静载设计要求；五齿不对称受力或偏载时会导致挖斗结构产生较大的应力与变形，并易导致挖斗发生早期损坏与失效；不同工况下挖斗结构应力及变形的差距随外载荷的增加而显著增大，且最大应力及变形多集中于挖斗的边齿位置，说明该处是挖斗结构的薄弱部位易发生损坏，这与该型号挖斗现场失效案例的反馈结果一致。本研究为挖斗的结构设计与优化提供了重要的理论依据。

Abstract

In this paper

a three-dimensional geometric model of the welded excavator bucket was established by using UG software. By importing MSC.Marc and ANSYS Workbench

finite element simulation and analysis were carried out respectively for the welding process of the key welding seams and the force of bucket tooth under different loading conditions. The stress and deformation of welded bucket structure were systematically studied when the bucket teeth are subjected to different forces in the excavation process. The results show that the residual stress in the weld area is relatively large

and the peak values of the longitudinal residual stress on the key welds of the lugs are located in the arc welding section of the weld. The bucket meets the static load design requirements when the five teeth are evenly stressed. However

when the five teeth are subjected to asymmetrical stress or biased load

the bucket structure will produce greater stress and deformation

and easily lead to early damage and failure of the bucket. The difference of structure stress and deformation between various working conditions increases significantly with the increase of external load

and the maximum stress and deformation are mostly concentrated in the position of the edge teeth of the bucket. This indicates that the edge tooth is the weak part of the bucket structure and liable to be damaged

which is consistent with the feedback results of the field failure cases of this type of bucket. The results provide an important theoretical basis for the subsequent structural design and optimization of the bucket.

关键词

Keywords

references

彭白水 . 国内外超大型液压挖掘机展望［J］. 建设机械技术与管理， 2008 （ 09 ）： 37 - 41 .

PENG Baishui . Prospect of Overseas and Domestic Extra Large Hydraulic Excavators ［J］. Construction Machinery Technology & Management ， 2008 （ 09 ）： 37 - 41 .

Haga M ， Hiroshi W ， Fujishima K . Digging control system for hydraulic excavator ［J］. Mechatronics ， 2001 ， 11 （ 6 ）： 665 - 676 .

任志贵，孙浩然，王军利，等 . 基于不同工作载荷的铲斗结构特性分析［J］. 机电工程， 2020 ， 37 （ 03 ）： 247 - 252 .

REN Zhigui ， SUN Haoran ， WANG Junli ， et al . Analysis of bucket structure characteristics based on different working loads ［J］. Journal of Mechanical & Electrical Engineering ， 2020 ， 37 （ 03 ）： 247 - 252 .

许莉钧，闫胜昝，李学强 . 基于等强度力学分析的挖掘机铲斗造型优化设计［J］. 机械设计， 2016 ， 33 （ 10 ）： 105 - 108 .

XU Lijun ， YAN Shengzan ， LI Xueqiang . Modeling optimization design of excavator bucket based on equal strength mechanics analysis ［J］. Journal of Machine Design ， 2016 ， 33 （ 10 ）： 105 - 108 .

季鹏，吴冬，殷晨波，等 . 基于ANSYS的挖掘机铲斗体焊接应力场模拟［J］. 电焊机， 2012 ， 42 （ 12 ）： 87 - 89 .

JI Peng ， WU Dong ， YIN Chenbo ， et al . Stress field simulation of excavator bucket body welding based on the ANSYS ［J］. Electric Welding Machine ， 2012 ， 42 （ 12 ）： 87 - 89 .

张明松，程炼兵，李晓维 . 基于ANSYS Workbench对铸造型挖斗的结构分析与优化［J］. 农业装备与车辆工程， 2015 ， 53 （ 11 ）： 41 - 44 .

ZHANG Mingsong ， CHENG Lianbing ， LI Xiaowei . Structure Analysis and Optimization of the Cast Type Bucket Based on ANSYS Workbench ［J］. Agricultural Equipment & Vehicle Engineering ， 2015 ， 53 （ 11 ）： 41 - 44 .

殷淑芳，尹开勤 . 基于SolidWorks的挖掘机铲斗分析与优化设计［J］. 机械研究与应用， 2016 ， 29 （ 02 ）： 141 - 143， 147 .

YIN Shufang ， YIN Kaiqing . Analysis and Optimum Design of Excavator Bucket Based on SolidWorks ［J］. Mechanical Research & Application ， 2016 ， 29 （ 02 ）： 141 - 143， 147 .

Hadi S ， Andika R M ， Chamid K . Design and analysis of trapezoidal bucket excavator for backhoe ［C］. SHS Web of Conferences， Saint-Petersburg ： EDP Sciences ， 2018 .

张重继，王海洋 . 基于ANSYS的装载机铲斗受力分析［J］. 煤矿机械， 2014 ， 35 （ 11 ）： 130 - 131 .

ZHANG Chongji ， WANG Haiyang . Stress Analysis of Loader Bucket Based on ANSYS ［J］. Coal Mine Machinery ， 2014 ， 35 （ 11 ）： 130 - 131 .

侯亚娟，李爱峰，王吉生，等 . 大型矿用挖掘机铲斗结构设计综述［J］. 工程机械， 2014 ， 45 （ 09 ）： 5 - 12 .

HOU Yajuan ， LI Aifeng ， WANG Jisheng ， et al . Summary of bucket structure design of large mining excavator ［J］. Construction Machinery and Equipment ， 2014 ， 45 （ 09 ）： 5 - 12 .

张强军 . 基于ANSYS挖掘机工作装置的有限元及疲劳寿命分析［D］. 陕西：西安建筑科技大学， 2015 .

ZHANG Qiangjun . Analysis of Finite Element and Fatigue Life o f Excavator’s Working Device Based on ANSYS Software ［D］. Shanxi ： Xi’an University of Architecture and Technology ， 2015 .

胡元哲 . 大型矿山挖掘机斗齿磨损失效分析与抗磨措施［J］. 润滑与密封， 2006 （ 05 ）： 165 - 167 .

HU Yuanzhe . Analysis on Wear Failure of Bucket Teeth of Mine Excavators and the Anti-wear Measures ［J］. Lubrication Engineering ， 2006 （ 05 ）： 165 - 167 .

程中修 . 液压挖掘机铲斗的失效分析和改进设计［D］. 山东：山东大学， 2016 .

CHENG Zhongxiu . Failure analysis and design improvement of the hydraulic excavator bucket ［D］. Shandong ： Shandong University ， 2016 .