Agricultural machine broken bolt removal method

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All kinds of agricultural machinery have large traction resistance when working in the field. If they are improperly maintained, it is prone to pull off the fixing bolts of the traction device. To extract broken bolts is not easy, a method of taking out broken bolts is introduced for reference. 1. First, remove the sludge on the broken surface of the broken bolt. Use a center malleium to smash the center of the section and then use an electric drill to drill a drill with a diameter of 6-8 mm to drill the hole in the center of the section. Note that the hole must be drilled. After the hole is drilled, the small drill bit is removed, and the drill bit with a diameter of 16 mm is replaced, and the hole of the broken bolt is further expanded and drilled. 2, take the electrode diameter of 3.2 mm or less using medium and small current in the broken bolt hole from the inside to the outside of the beginning of the surfacing welding to take off half of the entire length of the bolt can be. Start the arc welding not too long So as not to break through the outer wall of the bolt to burn through. Surfacing to the broken end of the bolt before continuing to surpass a diameter of 14-16 mm 8-10 mm high cylinder. 3、After surfacing, hammering the end face with a hammer will cause the broken bolt to vibrate in the axial direction. Because the heat generated by the arc and the subsequent cooling plus the vibration at this time will break the bolt and the thread of the body. Looseness between. 4. Carefully observe that when a trace of rust leaks from the fracture at the time of percussion, the nut of M18 can be set on the screed of the welding and the two are welded together. 5, after welding, cool, hot and cold with a plum wrench to twist around the nut back and forth can also twist back and forth side with a small hammer hit the end of the nut so that the broken bolt can be removed. 6. Take out the broken bolt and use a suitable silk hammer to process the thread in the frame once to remove the rust and other impurities in the hole.

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Below image as reference:

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