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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.
The components can be prefabricated in advance, without occupying the construction period, and the production and processing efficiency is high. The straight thread sleeve is convenient, convenient and simple to connect, and there is no electricity in the construction, and the construction can be carried out 24 hours a day. It can connect horizontal, vertical and oblique HRB335, HRB400 same-diameter or different-diameter building steel bars. The production, processing and installation quality of the connector shall comply with the current standards and relevant national industry standards and construction acceptance specifications. The sleeve specification requires a product certificate, and the appearance quality and thread standards should comply with the regulations. Estimates, micrometers and thread plug gauges are selected for testing.
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
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