Reinforcing steel sleeves are generally used in various steel lap jointing methods in the construction industry. The sleeve connection has the advantages of environmental protection and energy saving, saving building materials, stable quality, and strong adaptability to engineering construction, and the development trend is rapid. In particular, the technology of rolling straight threaded steel bar connection has already become the key way of mechanical connection of steel bars. The processing technology adopts the cold rolling process to produce and process the top of the building steel bar into straight external threads, screw the two wires connecting the building steel bars into the steel bar sleeve, and complete the longitudinal steel bar after the sleeve specifications are in the middle of the relativity.

    After the building steel bars on both sides bear the force, the force transmission is completed according to the outer thread between the wire knot and the sleeve specification, and then the tensile force transmission between the two longitudinal steel bars is completed according to the connecting sleeve specification. It can be seen that the quality of the sleeve specification is immediately compromised. The quality of the connection of the construction steel bars at the construction site. The application of steel lap joint waterproof casing in the engineering and construction manufacturing industry can greatly reduce the application of raw materials, and the actual operation is simple. It will not be limited by the type of building steel prefabricated components.

   The compressive strength of the building steel bar material conforms to the design scheme and the standard. The steel bar specification error is within the allowable range. If the lower error is too large, the diameter will be reduced or not round. During the production and processing of the wire head, the main parameters of the production and processing must be controlled within the allowable error range. The diameter of the rib stripping, the thread rolling head, the knife ring, the extrusion stroke arrangement, etc. must be adjusted accurately according to the specifications of the steel bar before the production and processing can be started. After the stainless steel wire head is produced and processed, the appearance quality is checked and checked one by one with vernier calipers, stoppers and thread ring gauges around the end. However, the customs should refuse to reproduce and process. Before production and processing, the construction steel scraps of the same specification, model and batch number are adjusted.

Specifications of reinforced straight thread sleeves are:

National standard sleeve Φ16 40*24

National standard sleeve Φ18 45*27

National standard sleeve Φ20 50×31

National standard sleeve Φ22 54*33

National standard sleeve Φ25 60*37

National standard sleeve Φ28 67*41

National standard sleeve Φ32 75*47

National standard sleeve Φ36 84*53

National standard sleeve Φ40 85*58