日本一卡二卡四卡无卡乱码视频免费,国产女人aaa级久久久级,亚洲国产在一区二区三区,性色av免费网站

泰安揚帆數(shù)控科技有限公司為您提供等相關(guān)信息發(fā)布和資訊展示,敬請關(guān)注!
咨詢服務(wù)熱線:
13345281377

新聞資訊

產(chǎn)品

公司新聞

焊接變形和應(yīng)力產(chǎn)生的原因和預(yù)防

來源:http://niuniury.com/  發(fā)布時間:2021-09-13 瀏覽次數(shù):0

焊接變形的基本形式有收縮變形、角變形、彎曲變形、波浪變形和扭曲變形等。焊接過程中,對焊件進行不均勻加熱和冷卻,是產(chǎn)生焊接應(yīng)力和變形的根本原因。減少焊接應(yīng)力與變形的工藝措施主要有:

The basic forms of welding deformation include shrinkage deformation, angular deformation, bending deformation, wave deformation and distortion deformation. Uneven heating and cooling of weldments during welding is the root cause of welding stress and deformation. The process measures to reduce welding stress and deformation mainly include:
一、預(yù)留收縮變形量根據(jù)理論計算和實踐經(jīng)驗,在焊件備料及加工時預(yù)先考慮收縮余量,以便焊后工件達到所要求的形狀、尺寸。
1、 Reserved shrinkage deformation according to theoretical calculation and practical experience, shrinkage allowance shall be considered in advance during material preparation and processing of weldments, so that the workpiece can reach the required shape and size after welding.
二、反變形法根據(jù)理論計算和實踐經(jīng)驗,預(yù)先估計結(jié)構(gòu)焊接變形的方向和大小,然后在焊接裝配時給予一個方向相反、大小相等的預(yù)置變形,以抵消焊后產(chǎn)生的變形。
2、 According to theoretical calculation and practical experience, the inverse deformation method estimates the direction and size of structural welding deformation in advance, and then gives a preset deformation with opposite direction and equal size during welding assembly to offset the deformation after welding.
三、剛性固定法焊接時將焊件加以剛性固定,焊后待焊件冷卻到室溫后再去掉剛性固定,可有用防止角變形和波浪變形。此方法會加大焊接應(yīng)力,只適用于塑性較好的低碳鋼結(jié)構(gòu)。
3、 When welding with rigid fixation method, the weldment shall be rigidly fixed. After welding, the rigid fixation shall be removed after the weldment is cooled to room temperature, which can effectively prevent angular deformation and wave deformation. This method will increase the welding stress and is only suitable for low carbon steel structures with good plasticity.
四、選擇合理的焊接順序盡量使焊縫自由收縮。焊接焊縫較多的結(jié)構(gòu)件時,應(yīng)先焊錯開的短焊縫,再焊直通長焊縫,以防在焊縫交接處產(chǎn)生裂紋。如果焊縫較長,可采用逐步退焊法和跳焊法,使溫度分布較均勻,從而減少了焊接應(yīng)力和變形。
4、 Select a reasonable welding sequence to make the weld shrink freely as much as possible. When welding structural parts with many welds, the staggered short welds shall be welded first, and then the straight long welds shall be welded to prevent cracks at the joint of welds. If the weld is long, the step-by-step back welding method and skip welding method can be used to make the temperature distribution more uniform, so as to reduce the welding stress and deformation.
五、錘擊焊縫法在焊縫的冷卻過程中,用圓頭小錘均勻迅速地錘擊焊縫,使金屬產(chǎn)生塑性延伸變形,抵消一部分焊接收縮變形,從而減小焊接應(yīng)力和變形。
5、 Hammering weld method in the cooling process of the weld, use a small round head hammer to hammer the weld evenly and quickly, so as to make the metal produce plastic extension deformation and offset part of the welding shrinkage deformation, so as to reduce the welding stress and deformation.
六、加熱“減應(yīng)區(qū)”法焊接前,在焊接部位附近區(qū)域(稱為減應(yīng)區(qū))進行加熱使之伸長,焊后冷卻時,加熱區(qū)與焊縫一起收縮,可有用減小焊接應(yīng)力和變形。
6、 Before welding by heating the "stress relief zone" method, heat the area near the welding part (called the stress relief zone) to make it elongate. When cooling after welding, the heating zone shrinks together with the weld, which can effectively reduce the welding stress and deformation.
七、焊前預(yù)熱和焊后緩冷預(yù)熱的目的是減少焊縫區(qū)與焊件其他部分的溫差,降低焊縫區(qū)的冷卻速度,使焊件能較均勻地冷卻下來,從而減少焊接應(yīng)力與變形。
7、 The purpose of preheating before welding and slow cooling and preheating after welding is to reduce the temperature difference between the weld area and other parts of the weldment, reduce the cooling rate of the weld area, so that the weldment can be cooled evenly, so as to reduce welding stress and deformation.

上一篇:焊接滾輪架上用的軸承竄動的原因
下一篇:自動焊專機的功用特性介紹!

精品1区2区3区产品乱码| 成人午夜特黄aaaaa片男男| 成人亚洲一区二区三区在线| 九九九精品成人免费视频| 午夜dj在线观看高清在线视频完整版 | 青春禁区视频在线观看| 国产精品国产免费无码专区不卡| 亚洲精品国产AV成拍色拍| 玩弄丰满少妇人妻视频| 无码国模国产在线观看免费| 国产精品www夜色视频| 久久久久久精品免费免费69 | 亚洲精品偷拍无码不卡AV| 夜夜爽77777妓女免费看| 巨大巨粗巨长 黑人长吊| 一区二区无码免费视频网站| 少妇精品导航| 午夜成年男人免费网站| 日日噜狠狠噜天天噜AV| 免费欧洲毛片A级视频| 亚洲综合色成在线播放| 又大又长粗又爽又黄少妇视频| 欧美极品少妇×xxxbbb| 美女视频黄频大全免费| 两女女百合互慰av赤裸无遮挡| 成全高清在线播放电视剧| 性做久久久久久久| 色婷婷综合和线在线| 18亚洲AV无码成人网站国产| 成人国产精品一区二区网站| 女人被躁到高潮嗷嗷叫游戏| 中文在线а√天堂| 伊人亚洲综合影院首页| 丰满人妻熟妇乱又仑精品| 久久久久无码精品国产蜜桃| 日韩丰满少妇无吗视频激情内射 | 无码人妻视频一区二区三区| 亚洲AV永久无码精品表情包| 水中色av综合| 免费一区二区无码东京热| 日本一卡二卡≡卡四卡精品 |