共查询到19条相似文献,搜索用时 62 毫秒
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激光清洗是应用脉冲激光束高能量冲击去除基材表面污染物,已广泛应用于航空航天、海工等领域高端装备的运维。但其清洗工艺时间长、激光束的高热量及电能的不完全转化导致大量碳排放产生。基于此,提出一种面向低碳的激光清洗过程工艺参数多目标优化方法。首先,分析激光清洗工艺碳排放特性,搭建激光清洗碳排放监测平台,建立激光清洗过程碳排放模型,探究激光清洗工艺参数对碳排放的影响规律;在此基础上,以清洗质量最佳、碳排放最低为目标,建立激光清洗过程多目标工艺参数优化模型,提出一种基于佳点集与协同进化框架多目标进化算法的模型求解方法,解决初始解质量差、种群多样性差、易陷入局部最优等问题;运用改进GRA与TOPSIS方法获得最佳的工艺参数组合。最后,应用QZ2425激光清洗装备对2A12铝合金进行除漆实验,实验表明:该模型及算法可有效降低激光清洗过程碳排放,保证清洗质量,为我国激光加工产业实现碳达峰、碳中和提供一条有效途径。 相似文献
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在CO2激光焊接加工中,影响高强镀锌钢板焊接质量的因素很多。根据试验加工对相关因素进行了分析,并给出了一套可以有效控制焊接高强钢加工质量的优化工艺参数,从而确保汽车用高强铜的焊接质量。 相似文献
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采用透过玻璃在线拍摄铝合金激光深熔焊接时小孔形状的方法,得到小孔形状的真实尺寸.随后建立铝和玻璃异种材料激光焊接温度场的数学模型,运用数值模拟法分析了激光深熔焊接铝合金与玻璃的温度场分布,在编制Matlab程序计算时用已观测到的小孔半径数值为基础,保证了数值模拟结果的合理性与正确性,得到了不同材料焊接温度场计算的一般方法. 相似文献
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针对罐式集装箱焊接工艺设计(CAWPP)系统中焊接方法难以选择的问题,提出了基于模糊决策算法的焊接方法选择评价方法。首先,利用模糊推理算法选择出可用的焊接方法,然后,以品质、成本、生产效率以及工人的劳动条件为准则进行熵权模糊综合评价,最终确定合适的焊接方法。系统实例表明,该方法不仅避免了焊接方法选择过程中的主观性和不确定性,也提高了整个焊接CAPP系统的柔性和灵活性。 相似文献
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为了探究激光摆动焊接铝合金的工艺特性,开展了手持摆动焊接头焊接6061铝合金的实验,对比分析了焊接速度、激光功率、振镜速度等工艺参数对焊缝宏观形貌的影响。通过高速相机捕获的实时动态影像,分析了激光摆动焊接匙孔的形成与特征,以及摆动焊接下熔池的形成与保持。实验结果表明,焊接速度与激光功率对焊缝形貌的影响较大,振镜速度应与焊接速度相匹配,即焊接速度慢对应振镜速度低,快速焊接对应振镜速度快。激光摆动焊接的匙孔会随着激光光斑的摆动变大,且匙孔始终位于焊缝中央,激光光束的摆动会搅拌熔池,影响熔池的热力耦合与焊缝成形,形成稳定均匀的鱼鳞纹状焊缝形貌。 相似文献
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Chen Zhixiang Song Yonglun Zhang Jun Zhang Wanchun Jiang Li Xia Xuxin 《Frontiers of Mechanical Engineering in China》2007,2(2):218-223
A laser vision sensing based on the adaptive tungsten inert gas (TIG) welding system for large-scale aluminum alloy components
was established to fit various weld groove conditions. A new type of laser vision sensor was used to precisely measure the
weld groove. The joint geometry data, such as the bevel angle, the gap, the area, and the mismatch, etc., aided in assembling
large-scale aerospace components before welding. They were also applied for automatic seam tracking, such as automatic torch
transverse alignment and torch height adjustment in welding. An adaptive welding process was realized by automatically adjusting
the wire feeding speed and the welding current according to the groove conditions. The process results in a good weld formation
and high welding quality, which meet the requirements of related standards.
Translated from Journal of Beijing University of Technology, 2006, 32(8): 714–718 [译自: 北京工业大学学报] 相似文献
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Xiaoyu Cai Huan Li Huiliang Wei Lijun Yang Ying Gao 《The International Journal of Advanced Manufacturing Technology》2014,75(9-12):1829-1836
In this paper, the effect of laser on the welding process in metal inert gas (MIG) welding of aluminum alloys was studied exploiting high-speed imaging and welding electrical signals collecting. Bead-on-plate welding experiments were conducted using conventional short-circuiting transfer MIG welding and laser-short-circuiting transfer MIG hybrid welding. The obtained results point out that it took less time to strike the arc in laser-MIG hybrid welding, and the stability of arc striking was increased. When the laser was introduced into the arc atmosphere, the arc was compressed, and the welding energy was more concentrated. The arc cathode spot was fixed to the laser beam impinging spot, so the arc could burn stably. In laser-MIG hybrid welding, the droplet short-circuiting transfer stability and the weld appearance were improved significantly. Moreover, an analysis method of judging droplet transfer stability which bases on statistical techniques was proposed. By this method, it can be concluded that the short-circuiting transfer process became more stable in laser-MIG hybrid welding. 相似文献
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Shuo ZHU Hua ZHANG Zhigang JIANG Bernard HON 《Frontiers of Mechanical Engineering》2020,15(2):338-350
Frontiers of Mechanical Engineering - Low-carbon manufacturing (LCM) is increasingly being regarded as a new sustainable manufacturing model of carbon emission reduction in the manufacturing... 相似文献
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Kanwer S. Arora Sunil Pandey Michael Schaper Rajneesh Kumar 《The International Journal of Advanced Manufacturing Technology》2010,50(9-12):941-952
In this work, successful friction stir welding of aluminum alloy 2219 using an adapted milling machine is reported. The downward or forging force was found to be dependent upon shoulder diameter and rotational speed whereas longitudinal or welding force on welding speed and pin diameter. Tensile strength of welds was significantly affected by welding speed and shoulder diameter whereas welding speed strongly affected percentage elongation. Metallographic studies revealed fine equiaxed grains in weld nugget and microstructural changes in thermo-mechanically affected zone were found to be the result of combined and interactive influences of frictional heat and deformation. A maximum joining efficiency of 75% was obtained for welds with reasonably good percentage elongation. TEM studies indicated coarsening and/or dissolving of precipitates in nugget. For the gas metal arc weld, SEM investigations revealed segregation of copper at grain boundaries in partially melted zone. 相似文献
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