Cold extrusion connection has been widely used in high-rise buildings, highways, railways, highways, tunnels, bridges, airports, dams, earthquake resistant buildings, etc
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Rebar connection methods are divided into lashing, mechanical connection (sleeve type extrusion mechanical connection, rolled straight threaded steel mechanical connection, tapered thread mechanical connection), welding (flash butt welding, electroslag pressure welding, arc welding, etc.)
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Can save steel, improve structural performance, improve work efficiency, and reduce costs The advantages of mechanical connection of steel bars. Cold extrusion is simple to operate and easy to master. For moderately high degrees, the steel connection quality is better than the mechanical properties of the base material, the connection speed is fast, safe and reliable, no open fire operation, no fire hazard, no environmental pollution, and civilized construction.
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(1) Insert the steel bar into the sleeve so that the end face of the steel sleeve is aligned with the mark line of the steel bar extending position. (2) According to the mark of the indentation position of the steel sleeve, align the position of the positive pressure die, and make the movement direction of the pressure die perpendicular to the plane where the two longitudinal ribs of the steel bar are located, so as to ensure that the maximum crimping surface can be on the transverse rib of the steel bar. (3) For crimping, half of the steel joints are crimped in advance, and then lifted to the work site to complete the other half of the steel joints, which can reduce the difficulty of high-altitude operations and speed up the construction. (4) Three parameters of the extrusion process should be correctly mastered during construction: ① crimping sequence: crimping from the middle to both ends; ② Crimping force: The crimping force should be tightly fastened between the steel sleeve and the steel bar, which can be implemented in accordance with relevant regulations; ③The number of crimping passes: It is directly related to the quality of the joint and the construction speed, and it can also be implemented in accordance with relevant regulations.
Free QuotePreparations for Cold Extrusion Rebar Machine
(1) According to the diameter, material and connection sleeve of the crimping connection, the crimping force and the number of crimping are determined by calculation and testing.
(2) Carry out the training of operators, and they will be allowed to work after passing the examination. Those who do not have the operation certificate are not allowed to construct.
(3) Choose suitable construction equipment and check whether the equipment is operating normally.
(4) After the steel sleeve is transported to the construction site, 5% of the processed steel sleeve shall be selected for inspection and acceptance. Those who fail to pass are not allowed to enter the site.
Precautions
(1) For steel bar extrusion connection, the minimum center spacing of steel bars is required to be 90mm.
(2) The axis of the connecting steel bar should be kept in line with the axis of the steel sleeve to prevent eccentricity and bending.
(3) The connection quality must be implemented in accordance with the requirements of the relevant regulations.
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