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
  • seam welder
< >

seam welder

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.

  • seam welder
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.
亚洲国产天堂久久综合| 性调教室高h学校小说| 欧美freesex黑人又粗又大| 亚洲色久悠悠av在线观看| 天天躁日日躁狠狠躁日日躁| 亚洲国产精品无码久久一线| 女人被添高潮全过程A片| 中文字幕人妻偷伦在线视频| 狠狠人妻久久久久久综合| 国产又黄又大又粗视频| 国产av电影在线观看| 男女啪啪做爰高潮全过有多少姿势 | 亚洲午夜精品A片久久| 国产午夜精品一二区理论影院| 无码永久成人免费视频| 被体育老师c了一节林妙妙| 不许穿内裤随时挨c调教h| 把黄瓜慢慢推进去…啊| 国产成人精品视频a片西瓜视频| 无限看片的视频高清在线| 亚洲无mate20pro| 天黑黑影院在线观看视频高清免费 | 欧美黑人乱大交bd| 色偷偷人人澡人人爽人人模| 亚洲最大成人av在线天堂网| free嫩白18sex性hd处| china中国妞tubesex| 强开少妇嫩苞又嫩又紧九色| 久久精品午夜一区二区福利| 夜夜躁婷婷av蜜桃| 女人被躁到高潮嗷嗷叫游戏| brazzers欧美巨大| 国产97人人人超碰超爽| 高潮毛片无遮挡高清免费视频| 免费无码国产欧美久久18| 最近2018中文字幕免费看在线| 久久偷看各类wc女厕嘘嘘偷窃| 少妇高潮喷水久久久久久久久| av网站大全| 男女啪啪做爰高潮全过有多少姿势| 校花醉酒后被乞丐进入|