Recently, many friends in the excavator industry called us to tell us that the elastic arm of their long arm excavator was cracked. Today, Xiao Editor has arranged an article for us to refer to.
It is necessary to clean up the elastic arm of excavator before welding, that is to say, to remove the original cracked welded meat, to grind it with a cross-polishing machine or to use carbon arc air gouging when conditions permit, but it is necessary to clean iron oxide after planed.
If possible, it also needs to preheat 100 degrees in the welding orientation, and then weld with 3.2J507 electrode of diameter. The welding will stop after a short time. The welding seam and the edge of the weld will be hit with a hammer. After complete welding, hammer will be used to knock until the weld is completely cooled.
The purpose is to release the welding stress, because heat treatment can not be done after welding. It is necessary to ensure penetration during welding. If the weld seam has a large azimuth gap, the back plate can be added inside.
Generally speaking, because each excavator cracks differently, let's take the following example to illustrate most of the situation.
In process one, the side boards are cut from the left and right sides of the elastic arm crack of excavator from 180 mm to 200 mm, and the lower cover is cut from the width of the side boards to about 150 mm more. In the picture, the blue part is the cut part of the side plate, and the red part is the cut part of the lower cover plate.
In process two, the lining plate is welded under the cracked cover plate, and the cracks in the cover plate are welded at the same time. The welding process should be smooth and free of bubbles.
In process 3, after welding, according to the blue side plate cut out in process 1, a piece of iron plate is re-cut and welded according to its size, and the lining plate is inserted inside. The liner is longer than the sealed side plate.
Fourth, after the completion of the step, the bottom cover is not sealed. Before sealing the bottom cover, the lining board should be punched first. After finishing the lining board and sealing the bottom plate, the repairing work of the elastic arm of the excavator is basically finished. It can be polished and repaired with putty paint.
The above information is the news that our elongated arm excavator has provided to you. I hope it will be helpful to you. If you want to know more about this industry, please click on our website: http://www.rbaras.com!