人妻中出无码一区二区三区,男女又黄又刺激a片免费,成人三级做爰视频在线看,国产精品99久久久久久人

Welcome to XX Bearing Technology Co., Ltd
CN|EN
Your location: Home -> Product display -> seam welder
  • Automatic roller welding machine
< >

Automatic roller welding machine

Roll welding machine is a machine used for roll welding. Roll welding, also known as circular seam welding, is a method of using a pair of roller electrodes instead of cylindrical electrodes for spot welding.

  • Automatic roller welding machine
Details


Product Introduction:

Roll welding machine is a machine used for roll welding. Roll welding, also known as circular seam welding, is a method of using a pair of roller electrodes instead of cylindrical electrodes for spot welding. The welded workpiece moves between the roller plates, creating a sealed weld seam with overlapping fusion nuclei to weld the workpiece together. Generally, AC pulse current or amplitude modulation current can be used, and three-phase (single phase) rectification, intermediate frequency, and high-frequency DC current can also be used. Roll welding is widely used in thin plate welding of sealed containers in oil drums, cans, radiator, aircraft and automobile fuel tanks, rockets and missiles. The general welding thickness is within 3mm of the single plate.
Main features:
The weld seam of roll welding consists of one welding point, which can be divided into roll spot welding or airtight seam welding according to different core melting overlaps. The formation process of each solder joint, like spot welding, involves three stages: pressurization, heating melting, and cooling crystallization, but there are significant differences from spot welding. Due to the inevitable phenomenon of shunt, the distribution of current and thermal fields in the welding area has its own characteristics; The rolling disc that transmits pressure and is heated by electricity continuously rotates to change the welding position, so that the distribution of current and heat fields, as well as the crystallization characteristics of the melting zone, are all related to the speed of changing the position.
亚洲gv钙片在线观看网站| 我在ktv被六个男人玩一晚上| 国产欧美一区二区三区| 狠狠综合久久av一区二区| 天天做天天爱夜夜爽毛片毛片| 老公的朋友跟我做完就不理我了| 天天躁夜夜躁狠狠躁av乐播蜜桃| 办公室秘书无码激情AV| 草色噜噜噜av在线观看香蕉| 日本在线 | 中文| 挽起裙子跨开双腿运动| 曰本女人与公拘交酡免费视频 | 日韩亚洲变态另类中文| 特级a欧美做爰片黑人 | 国产精品成人一区二区三区无码| 国产成人无码aa精品一区| 娇小白人女vs巨大黑迪克| 亚洲中文无码卡通动漫野外| 国产成人av无码一二三区| 亚洲成av人电影在线观看| 欧美熟妇dodk巨大| 国产一区二区三区乱码| 亚洲av无码一区二区三区电影| 久久久精品日本一区二区三区| 丰满老熟妇好大bbbbb仙踪林| 秘书被老板cao到合不拢腿| 风流老熟女一区二区三区| 极品教师韩剧在线观看第一集| 国产精品一区二区久久国产| brazzers欧美巨大| 超级yin荡的公司聚会| 女教师の爆乳bd在线观看| 丰满大爆乳波霸奶| 宝贝水真多真紧好爽夹死我了| 又爽又色禁片1000视频免费看| 国产精品一区二区 尿失禁| 国模杨依粉嫩蝴蝶150p| 久久人人爽人人爽人人AV| 3dmax动漫 在线观看| 国产绳艺sm高潮调教失禁vk| 亚洲av无码乱码国产精品久久|