焊接順序就是在焊接結構上先焊哪部分，后焊哪部位，即每道焊縫的焊接順序。

　　The welding sequence is the welding sequence of each weld, which part is welded first and which part is welded later.

　　焊接順序不合理對焊接質量的影響：

　　Influence of unreasonable welding sequence on welding quality:

　　（1）焊接順序影響焊件的應力和變形，焊接順序不合理會造成焊件變形或內應力過大，降低焊件質量，還會導致焊件報廢。

　　(1) The welding sequence affects the stress and deformation of the weldment. Unreasonable welding sequence will cause the deformation or excessive internal stress of the weldment, reduce the quality of the weldment and scrap the weldment.

　　（2）裝配和焊接順序不合理，會導致某些位置焊接困難，無法焊接，降低了焊接結構的強度或氣密性要求。

　　(2) Unreasonable assembly and welding sequence will lead to difficult welding at some positions, which will reduce the strength or air tightness requirements of the welded structure.

　　（3）焊接順序選擇不合理，與腐蝕性介質接觸的焊縫在焊后會受到熱作用，產生晶間腐蝕，降低焊件耐蝕性。

　　(3) The selection of welding sequence is unreasonable. The weld in contact with corrosive medium will be subjected to thermal action after welding, resulting in intergranular corrosion and reducing the corrosion resistance of weldments.

　　如何選擇焊接順序

　　How to select welding sequence

　　選擇焊接順序的基本原則如下：

　　The basic principles for selecting welding sequence are as follows:

　　（1）從裝配焊接角度來看，要在不造成焊接困難為原則的前提下來考慮焊接順序。

　　(1) From the perspective of assembly welding, the welding sequence should be considered on the premise of not causing welding difficulties.

　　（2）從減少殘余應力、焊接變形的角度考慮：

　　(2) From the perspective of reducing residual stress and welding deformation:

　　a.從焊接結構的中心向外焊接；

　　a. Welding outward from the center of the welded structure;

　　b.從厚板方向向薄板方向焊接；

　　b. Welding from thick plate to thin plate;

　　c.先焊收縮大的接頭，再焊收縮小的接頭；

　　c. Weld the joint with large shrinkage first, and then weld the reduced joint;

　　d.先焊垂直焊縫，再焊水平焊縫；

　　d. Weld the vertical weld first and then the horizontal weld;

　　e.平行焊縫應盡可能同時同向焊接；

　　e. Parallel welds shall be welded in the same direction as much as possible;

　　f.先焊短焊縫，然后再焊長焊縫。

　　f. Weld the short weld first and then the long weld.

　　以上為大家詳細介紹了關于焊接成型是否好看與焊接順序有關的內容，希望上述內容對大家有所幫助。

　　The above introduces in detail the contents related to the welding sequence about whether the welding forming is good-looking. I hope the above contents will be helpful to you.

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