Precautions for high-strength bolts

Jul 21, 2021

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Quality considerations

   (1) The surface rust, oil stains, burrs on the bolt hole wall, welding bead, etc. should be cleaned up.

   (2) After the contact friction surface is processed, the specified anti-scratch coefficient requirements must be met. The high-strength bolts used should have matching nuts and washers. They should be used as a set when in use, and should not be interchanged.

  (3) When installing the friction surface of the processed component, it is not allowed to be stained with oil, dirt, etc.

   (4). The friction surface of the module should be kept dry during installation, and work should not be carried out in the rain.

   (5). Strictly check and correct the deformation of the connected steel plate before installation.

   (6) It is forbidden to hammer into the bolt during installation to prevent damage to the bolt thread.

  (7). The electric wrench that is tested regularly when in use, to ensure the accuracy of the torque, and operate in the correct tightening sequence.

  Main safety technical measures

   (1) The size of the wrench used for the adjustable wrench should be consistent with the size of the nut, and a small wrench should not be used to add casing. A dead wrench should be used for high-altitude operations. For example, a rope should be used to fasten an adjustable wrench and a safety belt should be fastened.

   (2) When assembling the connecting bolts of steel components, it is strictly forbidden to insert the connecting surface or probe the screw holes with your hands. When picking and placing the shim plate, your fingers should be placed on both sides of the shim plate.


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