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英国推出了一种 TIG自动焊机。其输出电流为 2 50安培 ,交直流两用。是一种惰性气体保护焊机。它能在 TIG焊接区域内为自动、有轨迹的焊接提供多种可能的范围。该焊机的程序编制是通过单独的计算机来完成的。它能提供一个多达 1 0 0个程序的直接存储容量。这些程序可转到软盘上 相似文献
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铜铝管接头焊接质量直接影响电冰箱的产品质量。优质的铜铝管焊接接头现已成为目前制冷行业急需攻关的技术。为解决这个问题,自行研制出自动焊接设备,采用电阻焊原理进行铝包铜插接式铜铝管的焊接。其特点是在推进过程中铜管外表面与铝管内表面摩擦。可将铝表面的致密氧化膜刮掉,露出新鲜铝金属,从而提高了焊接强度。铜铝管焊接的关键是对时间控制精度、稳定性、可靠性等性能指标的控制。采用可编程控制器(PLC)。通过编写程序进行控制。可以大大提高焊机的上述性能指标。并使其具有预调谐和预显示功能。增加了该机器的技术含量。制冷行业可采用此设备焊接方法焊出优质的铜铝管焊接接头。 相似文献
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焊机在连退生产线上起着关键作用,它主要负责前后带钢的连接,实现连续生产。如果焊机出现问题,特别是焊接过程出现问题,很有可能会造成停线。停线降温,再起线升温,其造成的经济损失巨大。而变压器冷却系统不仅仅用来降低变压器温度,它参与了焊接控制,所以为了减少焊机故障,现针对焊机变压器的冷却系统进行优化,使生产能顺利稳定进行。 相似文献
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该文对DODO全自动电阻焊罐身焊接机的焊接传动问题作了全面细致的分析 ,并提出了设计改进方法 相似文献
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王新金 《郑州轻工业学院学报(自然科学版)》1994,9(2):20-23
提出了一种新型的电焊护目镜,它是由光电控制电路、变色镜片、双防(防红外、紫外)透明玻璃镜片构成。其特点是护目镜随弧光的开启自动变暗,而随弧光的停止又自动变亮;在弧焊作业过程中,操作者不需移动护目镜;抗各种背景光干扰,该护目镜已通过省科委组织的鉴定。 相似文献
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《Journal of the Institute of Brewing》2017,123(1):81-97
Brewery industry processing plants are made‐up of tanks, heat exchangers and columns, which are factory‐built, interconnected by thin‐walled pipes and bends, assembled together on‐site. However, pipes are inaccessible from inside so onsite welding is more difficult to control, leading to poor or inadequate welded joints that can compromise product quality for correctly designed plants. One factor leading to poor welds is pipe geometry as pipes are manufactured to outer diameter (OD), wall thickness and ovality tolerances that affect the alignment of pipe ends. A mathematical algorithm was developed to assess interconnecting pipes and bends from a brewery fabrication site to achieve a minimum of 80% area overlap around the pipe circumference. The 80% was simply a reference point based on a 90% overlap ±10%. 316 L stainless steel pipes of different OD were tested together with 53 mm OD 90° elbows. It was discovered that well‐performing welds were difficult to achieve with random orientation of pipes. Better results were achieved by aligning major axes of pipes as there was an increase from 51 to 91% after major axis alignment on welds for straight pipes. There was an increase from 22 to 59% and from 58 to 85% for manufacturers 1 and 2, respectively, for straight pipes‐to‐bends welds. The higher chances of success for manufacturer 2 were attributed to better OD, wall thickness and ovality control. Whilst the welder is unable to control manufacturer tolerances, they are able to manage orientation of pipes to achieve better welds. Copyright © 2017 The Institute of Brewing & Distilling 相似文献
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沈韶华 《北京印刷学院学报》2009,17(2):43-45
采用变位齿轮可以提高齿轮的承载能力,针对变位齿轮设计的关键问题——选择变位系数,采用VB语言建立适合工程应用的渐开线变位圆柱齿轮可视化设计平台。已知中心距,为了实现无侧隙啮合,在满足限制条件下,方便地确定啮合角的数值,按照等滑动系数原则选择变位系数,并进行几何计算、传动质量检查等,通过一个实际算例,介绍设计平台的使用方法。 相似文献