焊前装配精度对5083铝合金fsw工艺的影响-精密成形工程.pdfVIP

第7卷摇 第5期 摇 摇 摇 摇 摇 摇 精 密 成 形 工 程 摇 摇 2015年09月 JOURNAL OF NETSHAPE FORMING ENGINEERING 摇摇摇 65 焊前装配精度对5083 铝合金FSW 工艺的影响 张骁,王敏,张会杰,朱智,于涛,杨广新 (中国科学院沈阳自动化研究所,沈阳110016) 摘要:搅拌摩擦焊属于精密的加工技术,对焊前装配精度要求比较高,装配精度的高低会直接影响 焊缝性能的优劣。 基于这一背景,研究了装配过程中对接间隙和板厚差对铝合金搅拌摩擦焊焊缝 表面成形、内部成形以及力学性能的影响。 研究表明:FSW 工艺对对接间隙存在1.1 mm 的容限, 在0~1.1mm 的对接间隙内,焊接接头与无缺陷接头的力学性能比较接近,当对接间隙高于这个 值时,接头性能就会由于缺陷的出现而显著降低;FSW工艺对板材板厚差也存在一定的容限,当板 厚差低于容限,所得接头的力学性能差距不大,当板厚差高于容限,焊接质量就会显著下降。 关键词:搅拌摩擦焊;装配精度;对接间隙;板厚差 DOI:10.3969/ j.issn.1674鄄6457.2015.05.010 + 中图分类号:TG453 .9摇 摇 摇 文献标识码:A摇 摇 摇 文章编号:1674鄄6457(2015)05鄄0065鄄07 Effect of Assembly Accuracy on FSW Process of5083 Aluminum Alloy ZHANGXiao,WANGMin,ZHANGHui鄄jie,ZHUZhi,YU Tao,YANG Guang鄄xin (Shenyang Institute of Automation,Chinese Academy of Science,Shenyang 110016,China) ABSTRACT:Frictionstirweldingisakindofprecisionprocessingtechnology. Ithasaveryhighdemandforassemblyac鄄 curacy. The performance of theweldcanbedirectly affectedbytheassembly accuracy. Basedonthisbackground,thein鄄 fluencesof butt clearanceandthicknessdifferenceonthe surfaceforming,theinternal shapeandthemechanicalproperties of the aluminum alloy were investigated. Theresultsshowedthat FSWprocesshadthecapacity limit of 1.1mmonthebutt clearance. In the clearance of 0 ~1.1 mm,the mechanical properties of the joints were close to that of the defect free joints. When the clearancewashigher than thislimit,the performances of thejointswould be significantly reduced dueto the appearance of defects. FSW process also had a capacity limit to the thickness difference