Bolt ball processing technology

          Bolt balls are mostly used in space frame structures. The main structural feature is: a ball has multiple holes with inner wires to connect multiple rods at one point. Using 45# steel, all raw materials will undergo 3/1000 sampling physical and chemical mechanical performance tests after entering the factory. Then go to the forging unit and use 250 kg or 750 kg air hammer to forge the ball blank. The blank is normalized to make its hardness reach HB197～225. The blank shall be free of defects such as cracks, overburning, pitting, etc., and the ovality shall not exceed 1% of the diameter. Applications include tubing-less downhole production equipment, casing explosion expanders, tubing gauges and other fields. It is also applied to the connection of rods and rods in grid steel structures.


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