汽车车轮轮罩焊装夹具设计毕业设计论文.doc

本科学生毕业设计汽车车轮轮罩焊装夹具设计院系名称：汽车与交通工程学院专业班级：车辆工程B07-2班学生姓名：指导教师：职称：教授黑龙江工程学院二○一一年六月TheGraduationDesignforBachelor'sDegreeDesignofAutomobileWheelCoverWelding-InstallationFixtureCandidate：Specialty：VehicleEngineeringClass：B07-2Supervisor：HeilongjiangInstituteofTechnology2011-06·HarbinII摘要焊装作为汽车生产过程的四大工艺之一，焊接质量的高低对轿车车身尺寸的影响至关重要，可以说，在车身制造过程中，焊装是关键工序，是整个车身制造的核心，白车身焊接质量的优劣决定了整车的制造质量。焊接夹具是保证车身焊接质量的最重要因素，焊接夹具的主要作用就是保证所有焊接冲压件之间的相对位置以及焊接件的尺寸精度，合理的夹具设计、焊点规划、焊钳选择，可以确保焊接质量，降低生产成本，提高生产效率。本文首先分析了汽车车轮轮罩焊装夹具设计的必要性和可行性；然后围绕车轮轮罩焊装夹具设计这一核心，通过对汽车焊装生产线、汽车焊装夹具的结构特点进行分析，归纳了焊装夹具的设计步骤和要点；重点对汽车车轮轮罩进行焊装工艺分析，研究了汽车车轮轮罩焊装夹具正确的夹紧位置及定位设计方式；最终完成汽车车轮轮罩焊装夹具的结构设计。关键词：汽车；轮罩；焊接；夹具；设计ABSTRACTWeldingproductionprocessasavehicleoneofthefourprocesses,thelevelofweldingqualityonbodysizeofcarisessential,canbesaidthatthemanufacturingprocessinthebody,weldingisthekeyprocessisthecoreofthewholebodymanufacturing,whitebodydeterminesthemeritsofqualityweldingvehiclemanufacturingquality.Weldingfixtureisguaranteebodyweldingqualitymostimportantfactor,themainroleofweldingfixturetoensurethatallweldingistherelativepositionbetweenthestampingandweldingpartsfordimensionalaccuracy,andreasonablefixturedesign,solderjointplanning,weldingclampselection,toensureweldquality,reduceproductioncostsandincreaseproductivity.Firstly,thispaperanalyzestheautomobilewheelcoverdesignofweldingfixturenecessityandfeasibility;Thenaroundthewheelcoveronthecoreweldingfixturedesign,weldingproductionlineofautomobile,carweldingfixturetoanalyzethestructuralcharacteristics,summarizesthestepsandweldingfixturedesignelements;Focusonthecarhoodforweldingwheelanalysisofthetechnologyofautomobilewheelcoverclampweldingfixturecorrectlocationandorientationdesignapproach;Finallycompletedthecarwheelcoversthestructuraldesignofweldingfixture.Keywords:Automobile;WheelCasing;Welding;Jig;Design目录摘要IAbstractII第1章绪论11.1课题的背景及意义11.2国内外研究现状21.3汽车焊装夹具的发展趋势31.4本课题研究内容3第2章汽车焊装工艺特点42.1汽车车身部件焊装工艺特点42.2零部件尺寸对焊装的影响42.3焊装夹具质量52.4焊接变形52.5操作影响62.6面向焊接的车身尺寸控制方法72.6.1车身基准统一系统72.6.2夹具精度控制82.6.3生产过程控