The structural difference between coupling bolts and traditional coupling bolts

CouplingThe structural differences between bolts and traditional coupling bolts are as follows:
1. Added an expandable bolt sleeve with an inner cone surface.The inner surface of the bolt sleeve and the outer surface of the coupling bolt are conical surfaces with the same taper and small taper. When an opposite force is applied to the bolt and the bolt sleeve in the axial direction, they will pass through the conical surface that cooperates with each other. A radial stress that expands many times is generated on the bolt sleeve.The outer diameter of the bolt sleeve is processed to be smaller than the inner diameter of the bolt hole (the diameter difference is 0～047 mm) to ensure that the coupling bolt and the bolt sleeve can easily penetrate into the bolt hole when no axial force is applied; After proper axial force, the bolt sleeve expands radially within the elastic range, which completely eliminates the radial gap between the two and ensures a tight fit; after the axial force is removed, the outer diameter of the bolt sleeve returns to the original processing size, so that The coupling bolt together with the bolt sleeve can be easily drawn out from the bolt hole.　
　　2. Use hydraulic jacking device and bolt tension device to install bolt sleeves and apply tighteningCouplingThe pre-tightening force of the bolt.After the coupling bolt and the bolt sleeve are inserted into the bolt hole, a hydraulic jacking device is used to firmly sleeve the bolt sleeve on the coupling bolt, and an axial force is applied to expand the bolt sleeve until the bolt sleeve and the bolt hole The gap between is 0

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