Long rails in jointless track are usually made on welded rail site or in railway welded rail factory.

無縫線路長(zhǎng)鋼軌通常由鐵路焊軌廠或現(xiàn)場(chǎng)焊軌基地焊接特级a级黄色网站。

The results show that mechanical heterogeneity has great influence on the J-integral of welded joint containing transverse crack. The J-integral on the path cross the interface between welded joint and base metal is higher than the J-integral on the paths in the weld metal for undermatched joint,while the J-integral on the path cross the interface between weld metal and base metal is lower than the J-integral on the paths in the weld metal for overmatched joint. Moreover,the difference of J-integral values increases with the increasing of the load and strength mismatching difference and the path-enclosed length of interface between weld metal and base metal.

計(jì)算結(jié)果表明：力學(xué)不均勻性對(duì)含橫向裂紋焊接接頭的J積分有重要影響，低匹配焊接接頭中積分路徑穿越焊縫與母材界面的J積分值高于積分路徑在焊縫內(nèi)的J積分值十八禁止观看黄色网站，高匹配焊接接頭中積分路徑穿越焊縫與母材界面的J積分值低于積分路徑在焊縫內(nèi)的J積分值；載荷越大日本啪啪网午夜啪啪网网站，焊縫與母材的強(qiáng)度差別越大国产白色视频在线观看2；積分路徑中包含的焊縫與母材界面長(zhǎng)度越大，J積分的差值越大一级欧美一级日韩片野外。

A detection method for welding lines based on K-L algorithm is discussed. Infrared light source is applied to get high quality images of welding lines through CCD. Image template libraries for unwelded and welded lines are constructed and the welding line image is processed by K-L algorithm to match with the template libraries to judge if the welding line has been welded. The experiment shows that above method is effective with high precision and speed and it can be applied on real-time detection of welding lines.

提出計(jì)算機(jī)對(duì)所得圖像進(jìn)行濾波和圖像分割国产浮力网，討論了K-L算法的原理及其在紅外焊縫圖像檢測(cè)中的應(yīng)用；以紅外光源照射焊縫毛片全网站，通過CCD攝取焊縫的圖像中文色婷婷国产精品视频，建立已焊和未焊的圖像模板庫，采用K-L算法對(duì)焊縫圖像進(jìn)行處理亚洲欧洲精品一区，并與模板庫進(jìn)行比較小说亚洲图片，得出焊縫是否焊接的結(jié)論；試驗(yàn)結(jié)果表明日韩一级片中文字幕在线免费观看，該方法檢測(cè)精度高人人超人人操人人操，檢測(cè)速度快，可以實(shí)時(shí)運(yùn)用于對(duì)手工電弧焊的焊縫質(zhì)量檢測(cè)中亚洲啪啪成年网。

The filtering core is round column and welded with top and bottom covers bye anti-corrosive steel bar in wedgy section.The distance between every steel bar will be same and according to the filtering requirement.Several hoops are welded outside.So this filtering core has enough anti-deformed strength as well as high accuracy for filtering.

每個(gè)過濾元件呈圓筒狀黄色视频在线观看视频免费网站，采用楔形截面的耐蝕鋼絲條與上下封焊接，每根絲條的間隔按過濾精度的要求等間隙均勻布置免费JJZZ4视频在线观看，在長(zhǎng)度方向還焊有多道環(huán)箍国产一级a爱大片免费视频，該濾芯不僅具有足夠的搞變形的剛度和強(qiáng)度，而且可以嚴(yán)格保證過濾精度一级黄片欧美乱伦。

Main products: Wire Mesh Machine: Chain link fence machine, Non shuttle weaving machine, Crimped wire mesh machine, Barbed wire machine, Razor barded wire machine, Window screening machine, Welded wire mesh machine, Expanded metal machine, Keel equipment, Clean ball machine, Wiredrawing machines; Wire Mesh: Stainless steel wire mesh, Chain link fence, Welded wire mesh, Wire mesh fence, Hexagonal wire netting, Expanded metal mesh etc. Widely used in petroleum, chemical, construction, civil, shield and other various industries.

主要生產(chǎn)：絲網(wǎng)機(jī)械：菱形網(wǎng)機(jī)欧美老妇午夜福利视频、無梭織網(wǎng)機(jī)、軋花網(wǎng)機(jī)18岁污污视频免费网站在线观看、刺繩機(jī)国内精品久久久久久快射、刀片刺網(wǎng)機(jī)、窗紗網(wǎng)機(jī)国产一乱一伦一情、電焊網(wǎng)機(jī)亚洲黄色播放、鋼板網(wǎng)機(jī)、龍骨設(shè)備99热在线观看精品免费、清潔球機(jī)A国产无码、拉絲機(jī)；絲網(wǎng)：不銹鋼網(wǎng)在线免费自拍视频一二区、菱形網(wǎng)欧美激情在线精品一区二区、電焊網(wǎng)、護(hù)欄網(wǎng)、六角網(wǎng)中文字幕毛片、鋼板網(wǎng)等欧洲A片，廣泛用于石油、化工亚洲乱伦视频乱乱、建筑网友自拍日韩视频在线观看、民用、食品養(yǎng)殖等各種行業(yè)色偷偷色噜噜狠狠网站老女肥。

A high-strength steel pipe rockbolt has an expansive rockbolt main body prepared by processing a high-strength steel sheet of 1.8-2.3 mm in thickness with tensile strength of 490-640 N/mm 2 and elongation of 20% or more to a welded pipe and roll-forming the welded pipe to a shaped pipe having one or more concavities extending along an axial direction.

高強(qiáng)度鋼管錨桿具有可膨脹錨桿主體国产精品4huWWW，該主體通過下列步驟制成：將抗拉強(qiáng)度為490～640N/mm 2 ，伸長(zhǎng)率為20％或更大人妻偷拍有码中文，厚1.8～2.3mm的高強(qiáng)度鋼板加工成焊接管日本特毛AAAAAA片，再將該焊接管滾軋成型成具有一個(gè)或多個(gè)沿軸向延伸的凹部的異形管。

On the basis of analyzing the feature of welded structures , the feature libraries and product model of welded structures have been deve loped.

闡述了焊接結(jié)構(gòu)件CAD系統(tǒng)的基于特征的建模技術(shù)色站在线直播。

The results show that the fatigue life of the peened joint is 20～30 times as long as the as-welded joints .Therefore,the improvement of the fatigue strength of welded joints by ultrasonic peening is remarkable.

試驗(yàn)結(jié)果表明：超聲沖擊方法對(duì)焊接接頭疲勞強(qiáng)度的改善效果十分明顯91嫩草国产在线看网站，能夠提高疲勞壽命20～30倍以上，極具實(shí)用價(jià)值愉拍自拍视频在线播放网站下载免费。

Test results show 1 the fatigue strength of peened joints under overloading, in spite of lower than the fatigue strength of the non-overloading peened joints, is still greatly higher than the fatigue strength of as-welded joints; 2 In the range of lower stress level and longer life, ultrasonic peening method exhibit better results than TIG dressing; 3 Fatigue strength of the welded joints with defects (such as undercut at the weld toe) can also be improved greatly after peening treatment.

結(jié)果表明超AAAA级毛片，超聲沖擊處理過的焊接接頭經(jīng)過載后疲勞性能有所下降，但與原始焊態(tài)相比提高疲勞強(qiáng)度一级一级A片、延長(zhǎng)疲勞壽命的效果仍然十分顯著欧美一纹一级a做片性视频；在低中應(yīng)力水平、中長(zhǎng)壽命區(qū)域欧美福利网站一区，使用超聲沖擊法提高焊接接頭疲勞強(qiáng)度比TIG熔修法效果更好爱情岛论坛首页亚洲啪啪；超聲沖擊處理后，含咬邊等缺陷的焊接接頭色污视频精品，疲勞強(qiáng)度同樣有較大的提高护士黄色网站。

It is a new method to increasing fatigue strength of welded joints and structure by peening welded toes with ultrasonic peening equipment.

使用超聲波沖擊焊趾來提高焊接接頭及結(jié)構(gòu)的疲勞強(qiáng)度，是國(guó)際上剛剛出現(xiàn)的一種新方法熟睡人妻系列av无码久久免费。