Changsha DLADTO Rebar Splice Co., Ltd

In the building construction, steel bar is an indispensable material, and steel bar joints are an important part to connect steel bars in construction. According to different connection strength requirements and connection methods,   couplers   can be divided into first-level joints, second-level joints, and third-level joints. What is the difference between them? 1. Different mechanical properties Grade I joint: the tensile strength of the joint is greater than or equal to the actual tensile strength of the steel bar to be connected or 1.10 times the standard value of the tensile strength of the steel bar, and it has high ductility and repeated tension and compression properties; Class II joint: the tensile strength of the joint is not less than the standard value of the tensile strength of the connected steel bar, and has high ductility and repeated tension and compression properties; Grade III joint: The tensile strength of the joint is not less than 1.25 times the standard value of

Extend rebar coupler  is designed for long, large, and dense bars being installed on site, and it is not convenient to rotate the re-bars. The extended rebar coupler is longer than the normal steel couplings. Product advantages:  1. Raw material-saving, high energy saving, high work efficiency. 2. Construction environmental protection. No flame, no noise pollution. 3. It is not be affected by the chemical compositions and types of reinforced bars and won't be influenced by weather and work-site. 4. Low cost, simple operation. 5. Can be prefabricated and the construction period can be shortened. 6. High dimension precision, reliable quality and stable performance. 7. High strength. The tensile strength usually more than 600 Mpa, it can reach 110% of yield strength of parent rebar. 8. After 2 million times of fatigue strength test, the connection is in good condition. 9. According to the inspection of national construction quality supervision and testing center, the rebar coupler joi

  Advantages of   rebar upsetting machine : 1. Simple operation, hydraulic and electrical control, no need for professional skills, and it can be turned on and operated after short-term training. 2. Expand the cross-sectional area of the end of the steel bar by 15-20%, so that the bottom diameter of the processed thread is not less than the diameter of the base material of the steel bar.  3. The steel bar upsetting machine has high production efficiency, upsetting 1 end in 10-15 seconds.  4. The processing range of steel bars is wide, and the steel bars with diameters of 16-40 can be processed.  5. It has the advantages of light weight, generous appearance, fast speed and flexible use. 6. The steel upsetting machine is environmentally friendly, safe and not affected by the environment and climate

Mechanical connections   has four types: Rebar sleeve extrusion connection It is used for on-site connection construction of grade Ⅱ and Ⅲ hot-rolled ribbed steel bars with a diameter of Ф20-32mm in reinforced concrete structures according to the requirements of first and second-level seismic fortification. Rebar taper thread sleeve connection It is used for the connection between steel bars with the same diameter or different diameters of Ф18-50mm grade II, III, and IV ribbed steel bars (including poorly weldable steel bars). Reinforcement upset straight thread sleeve connection It is used for the on-site connection construction of II, III grade vertical, oblique or horizontal steel bars with a steel bar diameter of Ф16-40mm in the concrete structure of industrial and civil buildings. Steel bar rolling straight thread sleeve connection Steel bar rolling straight thread sleeve connection is utilizes the characteristics of plastic deformation of metal materials and cold hardening to enh

Threaded joints   is coupler with threads. It is a relatively common in industry and daily life. The threaded joint makes the rebar connection easier to disassemble and replace, and it is cost-effectively. The characteristics of threaded joints are as follows: 1. It has high strength and good ductility, which can give full play to the strength and ductility of the steel base material. 2. Easy to operate, fast and easy to connect. 3. The detection is convenient and intuitive. 4. The straight thread processing for steel bar can be prefabricated, and the coupler can be manufactured in a factory, which doesn't occupy the construction period and has high processing efficiency. 5. Itis environmental protection during construction and connection, and can be constructed around the clock. 6. It has strong applicability that can be flexibly used in narrow place. 7. It can connect horizontal, vertical and inclined HRB335 and HRB400 steel bars of the same or different diameters.