How to repair the surface defects of aluminum pipe
Third, the pipe is used to do it, the thickness of a pipe length measurement and recording, in general use will be selected according to the use of its wall thickness specifications and the length of the specifications, if found to have stiff head tubes should be timely marked when used to head to stiff it uses the slow speed, and high temperature.Fourth, after the completion of the expansion pipe, aluminum pipe to the appearance check to see whether the pipe surface defects, if flawed, allowing him to eliminate the timely elimination of defects if too much, not to be able to restore to enter the furnace re grinding clean.When the fifth tubes are heated, the thickness of the top three branch material shall be measured. After the expansion is completed, a measurement shall be carried out, and the expansion speed and temperature shall be adjusted according to the changes of these two measurements.The whole round repair of aluminum tubes is the most common repair in the industry, with the following methods for repairing the pits or flattening
First。 Be careful not to cut too much as long as the removal of necking and drawing section and the tail part of cracking can be cut to pay attention, don't put the miter, after cutting in aluminum pipe.Second, pay attention to the material in the aluminum tube shelf should first check it, there is no damage to the surface, and then check it cut when there is no creases, cutting when there is no India, Pakistan and India if the number is small or shallow depth to grind it into later in the shelf, if found it is deep creases or Pakistan and India, the tube will not be able to use the shelves, can not be used as pipe, aluminum pipe mill after the repair to repair welding for leveling.
Method: to hand percussion pits with oxyacetylene flame annealing, after cooling, use hand hammer into the aluminum oblate tube, estimated knocking position try to knock, knock point and observe from the outside, adjusted and confirmed the knock point after the afterburner struck, until the elimination of pits. If it is difficult to strike in the middle, it is expected to be hardened by metal hammering. It must be reheated and annealed again, and then continue after cooling. The method is generally applicable to the repair of the larger diameter aluminum tube and the hand length of the pit. Not suitable for trimming of flattening defects
