Here, an ultrasonic peening method to compensate for the deteriorated mechanical properties of overlap weld defects without repair welding was studied. We experimentally investigated changes in the mechanical properties of defective welds before and after ultrasonic peening. The weld specimen wi...
1.External defects: undercut,overip,arc pit, gas cavity in surface,crack in surface.外部缺陷:咬边、焊瘤、弧坑、表面气孔、表面裂纹。 2.Welding the welds which are stagger first, then is the straight ang long weld.先焊错开的端焊缝,后焊直通长焊缝。 3.stick feeder machine焊丝进给自动弧焊机 ...
In narrow overlap welding, serious defects in the weld will lead to band breakage accident, and the whole hot dip galvanizing unit will be shut down. Laser vision inspection hardware is used to collect real-time image of weld surface, and image defect recognition and evaluation system is ...
The invention discloses a composite welding method for an overlap joint, which is characterized in that the overlap joint is subjected to the plasma arc welding and the consumable electrode gas shielded welding synchronously. The composite welding method overcomes defects in the prior art, reduces ...
Lack of energy when the scanning line is longer than 100 mm results in the lack-of-fusion pores, which degrades the mechanical properties of the printed part dramatically. Therefore, we propose an in situ welding process to overcome the issue. In order to further understand the microstructure ...
Lack of energy when the scanning line is longer than 100mm results in the lack-of-fusion pores, which degrades the mechanical properties of the printed part dramatically. Therefore, we propose an in situ welding process to overcome the issue. In order to further understand the microstructure ...
It is discovered that performance of eddy current and laser image identification on different types of weld defects is different, and the accuracy can be increased with the two methods combined. Last, to achieve real-time detection of narrow overlap welding, a two-stage defect recognition model ...
The results showed that sound overlap-welded joints of magnesium alloy AZ31B sheets without defects can be obtained. Among the welding parameters, defocusing distance and laser-to-arc distance were key factors to affect the penetration depth and bead shape. It also found that the cross-section ...
Laser keyhole initiation and termination-related defects, such as cracking and keyhole cavities due to keyhole collapse, are a well-known issue in laser keyhole welding of thick section steels. In longitudinal welding, run-on and run-off plates are used to avoid this problem. However, such an...
Inapposite welding parameters consisted of low rotational speeds and welding forces, and when utilized, they increased the occurrence of a lack of bonding and unfilled defects within the weld. The microstructures with a welding zone and heat-affected zone mainly consisted of upper bainite. The ...