For the inspection method of讀市 whether the spot welding mac行鐵hine is qualified after w站相elding, the first thing作媽 to be said is that the workpie服樹ce of each weld子線ment or the customer has cert快報ain requirements for the spot答雜 welding. Some o錯城f them are very demanding,器湖 requiring that the solder joints姐風 can hardly be seen o樂舊r have good firmness 冷東on the basis of very b子什eautiful appearance. Most we鐵通ldments require less. Therefore, we你好 should also make a新工djustment according t街紅o the above-mentioned d吧吃ifferent situations w秒文hen we check whether th唱舊e solder joint is qualified樂市.
For the weldments wi黃黑th high requirements, we c事土an use NDT methods such as fl快資aw detection and X-ray after w風下elding with spot welder. D些聽uring the inspection,車能 because the piezoelectric sensor is re雜從versible, the intermediate fr話暗equency spot wel來廠ding machine can和這 convert the acoustic pulse sign從又al into electric嗎南al pulse signal, and use t術村he propagation time of u一和ltrasonic wave in the spot welding join算呢t and the attenuation 風訊amplitude of ultrasonic energy 少嗎signal to evaluat市街e the severity of defects i空暗n the workpiece. It is often used生海 to inspect the spot w民店elding joint quality of automobile body窗的 and accessories 商姐with high quality requirements for 風快the weldment. For general we科車ldments, the requir舊商ements are not particularly購高 high, only some simple detection 熱事methods can be used. There 裡亮are also two cases of this裡窗, breaking the solder joint花兵 and not breaking t照劇he solder joint.
There are two ways to av藍信oid breaking the solder j明東oints. Insert the flat iron b吃理ar or screwdriver between the two花她 metals welded by the intermediate freq快現uency spot welding machine, ap草妹ply pressure on t民朋he tail of the iron bar司間 or screwdriver, and form a gap of 很算2.5-3.5mm between舊少 the metal plates. If the we算他lding spot is normal at this ti作村me, it means that it is a nor少聽mal welding spot with good w公了elding effect; 放很If the thickness of t廠得he plate is inconsistent, t師鄉he prying distance should be美師 controlled between 1.5-2.5m鐘聽m. If the prying is insiste老工d, the solder joint will be 那討damaged. The destru笑如ctive test is more convenient, usually 數老prying and twisting, w坐裡hich is called twist 媽河test or tear test. It can be seen th是那at the solder joint is not firm. It sh林購ould be noted that weldin樂外g slag should be re自工moved after completion.
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