装载机挖掘机动臂焊接应力焊接变形控制研究及应用

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1、重庆犬学硪士学位论文中文籀要摘要本文暾兵钵磁究ZL50C装载税臻臂缀合、CLG200．3翻臀籀体焊接生产现场葺羹绩羯遭壤中产生髑帮裂纹裙交澎静爨理，逸道测试韵饕缀合帮动罄籍俸翁簿接残余应力应变，分提动甓焊接变形及开裂产生黪爨爨，铡定生产现场羟铡焊按应力焊接变形的措施，并具体应用于生产现场以控制装载机ZL50C的动髂焊接变形达到产晶的技术要求。本文通过理论分析，指出装载机和挖掘机产生焊接应力应变的本质，并且制定出控制装载机动臂组合焊衙变形、挖掘机动臂箱体焊后焊接虑力的总体方案措施，为控制装载辊韵臂缀合簿接变澎和挖攘枫秘篱焊接裂绞的洛援工艺焚定蒸礁。垒产瑷场霹装载橇ZL5

2、0C挖掘税CLG200-3渤蒋溽接残余纛变成力逡彳予溺试，翥二最对爨测试的装载援、挖掘槛爆接痤力豹分毒及痤力交纯趋势进行戆分辨，对生产现场控制装载枫、挖掘机焊接应力变形工艺撼旌的具体制定有羹要的指导意义。针对装载机动臀组合焊接生产中动臂板焊后所存在的角变形和扭曲变形，从理论和施焊现场工麓方面分析了渤臂组合产生变形的原因，并通过对动臀组合焊接方法的正确选择、簿接籁序和弹接规范的傀纯设计，有效遗解决了装载机渤臂组合洋缓爻形懿闼趱。校攥生产瑗场游装载撬韵臀缀合、挖獬税动臀箱侮簿搂寝交应力盼测试缩粱，本文得到⋯系列的结论，并且对装载枧动甓缝会赡产晶范倒逮纷实骏，实验络票表蛾：

3、采月本文设计斡分段遇焊或分段对称瀑的生产工艺可以瞬媛减，l、装载枢麓譬组合的焊接变形，无须爝后校形即可达到产品设计的要求。荚继溺：焊接应力，焊接变形，分段遐焊，贴角焊缝重庆大学硪士学位纶文英文糖要A黔STRACTBasedontheexperimentalstudyoftheweldingdefort,nationandweldingcrackappearinginthec01．1rseofweldinginactivearnlsofloadingmachineZL50CanddiggingmachineCLG200—3．projectsaresettled协cont

4、rolweldingdeformationandweldingstressbyanalyzingreasonsofweldingdeformations，weldingcracksandtestingweldingresidualstress．Inaddition，theprojectsareusedforweldingactivearmsofloadingmachineZL50Ctocontrolitsweldingdeformation．Theessenceofweldingdeformationandweldingstressappearinginthecour

5、seofweldinginactivearmsofloadingmachineanddiggingmachineisanalyzedintheory，weestablishedawholeprojectthat’susedtocontrolweldingdeformationofloadingmachineandweldingStreSSofdiggingmachine，whichhavetheoreticallydirectivesenseinpracticalcourseofproduction．WeldingstressisteStedinlocalworksh

6、ops，furthermore，thedistributingofweldingstressandthechangingtrendofweldingstressareanalyzed，whichareimportanttocontrolweldingdeformationandweldingstressintheCOlJ．rseofpracticalproduction。AimingattheangleanddistortdeformationappearinginthecourseofweldinginloadingmachineactiveatTnscombina

7、tions，thereasonsofthedeformationisanalyzedintheoryandlocalproducingtechniqes，thenthedeformationissuccessfullyresolvedbymeansofselectingcorrectweldingmethods，weldingordersandoptimizingweldingcriteriondesign，Accordingtothetestingresultofweldingdeformationandweldingstressofloading