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 broken bolt off the surface of the sludge, with the center of the cross-section of the center to death, and then use an electric drill fitted with a diameter of 6-8 mm drill hole in the central section of the hole, pay attention to the hole must Drill through. 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, the use of medium and small current in the broken bolt hole from the inside to the outside surfacing welding, the beginning of the surfacing site to take off half the entire length of the bolt can be. The arc should not be too long, so as not to burn through the outer wall of the broken bolt. After surfacing to the upper end of the broken bolt, it is continued to build a cylinder with a diameter of 14-16 mm and a height of 8-10 mm. After the surfacing is completed, hammering the end face with a hand hammer will cause the broken bolt to vibrate in the axial direction. Because the heat generated by the arc and the subsequent cooling, coupled with the vibration at this time, will make There is looseness between the broken bolt and the thread of the body. ? 4 ä»” ä»” 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4. ?? 5. After welding, cool, hot with a plum wrench around the nut back and forth twist, back and forth can also be twisted side tapping the nut with a small hammer, so you can remove the broken bolt. 6. After taking out the broken bolt, use the appropriate silk hammer to machine the thread in the frame once to remove the rust and other impurities in the hole.
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