Preparation method of welded joint of aluminum pipes
A technology for welding joints and aluminum pipes, which is applied in welding equipment, pipes/pipe joints/fittings, resistance welding equipment, etc., can solve the problems of aluminum pipe joint oxidation and other problems, and achieve the effects of anti-seismic joints, no casting structure, and wide welding surface
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[0028] The preparation method of the aluminum pipe welded joint of the present embodiment comprises the following steps:
[0029] The first step is shrinking forming: take two sections of aluminum tubes, use one of them as the insertion aluminum tube 2, insert one end of the aluminum tube 2 and shrink it to form a straight tubular port with stepped diameter reduction; the other section of the aluminum tube remains in its original shape as a sleeve Connect aluminum tube 1;
[0030] The second step, pretreatment: before welding, carry out surface treatment on the welding ends of the two sections of aluminum tubes, the treatment method is as follows: alcohol or acetone ultrasonic vibration cleaning→alkaline cleaning→acid cleaning→water washing;
[0031] The third step, positioning: put the sleeved aluminum tube 1 on the fixed electrode group 3, and fix it with a high-pressure cylinder; put the inserted aluminum tube 2 on the moving electrode 4, and extend the front end into the s...
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