Cold extrusion rebar coupler may be a portable system for field connection of rebar. this is often an easy and efficient thanks to connect steel bars without having to organize the ends during
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1. The geometric dimensions of the cold-extruded steel joints and the position of the steel joints must meet the requirements, and the allowable deviation of their dimensions: length ±2mm; outer diameter ±0.5mm; inner diameter ±0.2mm; the casing surface must not have defects such as folds or scars, So as not to affect the quality of crimping. 2. The end of the steel bar must be straight and the bend must be corrected; the connecting end of the steel bar and the inner wall of the sleeve must not be mixed with oil, rust, and sand. The external grease of the sleeve must be wiped off. 3. The pattern of cold-extruded steel bar joints must not be flattened. 4. The joint should be 1m higher than the concrete surface to facilitate the connection with the extruded part to have a certain operating space.
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The crimping of cold extrusion joints is generally divided into two. For the first time, half of the casing is sleeved into the connected steel bar in the processing plant or on-site, and half of the joint is crimped, and then the other part is crimped on the construction site. 1. The steel bar should be marked with a line and set into the sleeve to ensure the depth and prevent air pressure. The distance between the end of the steel bar and the midpoint of the sleeve length shall not exceed 10mm. 2. The axis of the connecting steel bar and the axis of the sleeve should be kept on the same axis to prevent eccentricity and bending. 3. It should be crimped one by one from the center of the sleeve to the top, and the pressure mold should be aligned with the indentation position mark on the sleeve. 4. When connecting, it should be pressurized to the specified working pressure to ensure that the load is unloaded within two seconds. 5. Measure the extension length of the casing after crimping and record the connection operation.
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The cold extrusion connection of steel bars is to insert two steel bars to be connected into the steel sleeve, and use the extrusion connection device to extrude the steel sleeve in the radial direction to cause plastic deformation. The mechanical bite produced by the transverse ribs is integrated into a method of connecting steel bars. This process is a mechanical connection method, which has the advantages of high strength, strong rigidity, unified humanization, fast connection, easy control, and all-weather construction. This process standard is applicable to the cold extrusion connection technology of various types of reinforced concrete structures with diameters of 20-40mm Ⅰ and Ⅱ grade steel bars in industrial and civil buildings, high-rise buildings and foundations.
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Commonly used steel classification method: based on geometric shape classification, according to cross-rib cross-sectional shape and rib spacing to classify different or sub-types, such as the British Standard (BS4449), divide it into I, II steel. This classification mainly reflects the retention performance of steel bars. The use of cold-extruded steel joints to connect ribbed steel does not require threads, and high-strength cold-pressed joints make connection more convenient.
The process is suitable for fixing and supporting systems of industrial buildings of any scale. Concrete buildings in the industrial sector can take many forms. Many large warehouses and other steel frame structures require heavy concrete floor slabs.
Cold extruded rebar connectors help reduce rebar congestion at slab joints and promote faster and more efficient concrete placement.
Cold-extruded steel connectors and steel continuous products provide the structural integrity required for reinforced concrete walls. Many industries and large buildings rely on the quality assurance and installation speed provided by QF fixtures.
Used in stadiums, airports, exhibition centers, high-rise buildings, residential buildings, shopping malls, conference centers, railway construction, elevated and high-speed railway stations and other projects. QF has more than ten years of R&D and operation experience. It is a supplier integrating R&D, manufacturing, production, sales and use, and has its own engineering service department. According to the requirements of on-site reinforcement connection quality and technological innovation, we will provide technical services and development at any time to provide more effective on-site feedback for QF production headquarters. In response to some of the problems that occurred on site, the production headquarters will continue to improve its own products, thereby improving the reinforcement connection technology. Through this effective method, the quality of QF steel joints and machines has been effectively improved. Only if you are satisfied, you can rest assured!
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