搅拌摩擦焊接过程振动与受力特征分析
毕业论文关键词：BTFSW；6061-T6铝合金；振动检测；焊接质量
Abstract BTFSW is an innovative solid connection technology in recent years. Compared withsingle shaft friction stir welding, BTFSW has many advantages, especially in weldingsome lightweight aluminum magnesium alloy. In order to analyze the relationship betweenwelding quality and the characteristics of the vibration in welding, the Test set up a set ofexperiments, take different kinds of speed and the preheating time, to achieve the vibrationeffect of different experiment, so as to obtain different vibration signals. We used 6061-T6Aluminum Alloy which is 8mm thick to take tests of different schemes.We set respectively430rpm, 440rpm, 450rpm speed experiments, to obtain vibration spectrum.There are 3vibrating sensors linked with base materials, to measure the specific conditions inhorizontal and vertical when welding.Then we got the average amplitude and vibrationamplitude and vibration frequency. Through the analysis of specimens, such as polishingspecimen, grinding samples, taking metallographic photos and tensile test by measuringhardness, etc. we analyzed mechanical properties and comprehensive analysis of threegroups of welding quality.In general, vibration frequency is essentially the same, vibrationamplitude of a smaller, and average amplitude changed little in the welding process, finallyget the quality of welding is good, 440rpm speed experiment in the test specimen, throughexperimental analysis is more excellent welding quality. Therefore, the study of doubleshoulder friction stir welding process of vibration, is of great significance can help in moreclear understanding and analysis of the vibration and parameters between, and weldingquality between the contact.
Keywords: BTFSW; 6061-T6 aluminum alloy; vibration test; micro structure;welding quality
目 录
第一章 绪论1
1.1 课题的背景与意义..1
1.2 搅拌摩擦焊...2
1.2.1 搅拌摩擦焊原理...2
1.2.2 搅拌摩擦焊的优缺点.. 2
1.2.3 搅拌摩擦焊研究现状和应用..3
1.3 双轴肩搅拌摩擦焊..3
1.3.1 双轴肩搅拌摩擦焊的原理..4
1.3.2 双轴肩搅拌摩擦焊的特点..4
1.3.3 双轴肩搅拌摩擦焊的应用..4
1.4 铝合金的特点...4
1.5 本文研究目的及内容..5
1.5.1 研究目的... 5
1.5.2 研究内容... 5
第二章 实验材料设备及数据采集 6
2.1 试验材料...6
2.2 实验设备及原理.. 6
2.2.1 双轴肩搅拌摩擦焊机 BTFSW... 6
2.2.2 焊机控制系统结构...7
2.2.3 双轴肩搅拌摩擦头...7
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