Changsha DLADTO Rebar Splice Co., Ltd

For construction site welding, joint quality is not easy to guarantee. The reason are as follows: 1. There is a shortage of qualified welders；The welding quality is greatly affected by the climate. In cold regions and south regions with rainy days, welding cools fast and is easy to brittle in winter. The weldability of the steel bar is the basic requirement to ensure the welding quality, but now the quality of the steel bar is not stable, and some places even use fake products. Therefore, welded joints is not recommended for the longitudinal steel bar of frame beam and column. At the same time, according to the regulations, the longitudinal steel bar of the beam and column should not be welded with the stirrup, tie bar and embedded parts. Our rebar mechanical connection technology has been developed in the late eighties and has been developed and applied with cold extrusion rebar coupler. In recent years, the steel bar connection technology developed rapidly, with various of types ent

There is no specific standard for the length of   rebar coupler , the JGJ107-2016 "Technical Regulations for Mechanical Connection of Steel Bars" also does not clearly stipulate the length and outer diameter of rebar coupler. The JG/T163--2013 (Technical Regulations for Mechanical Connection of Reinforced Bars) specified the yield and outer diameter of rebar coupler, and the small size table of standard cylindrical straight threaded sleeves made of No. 45 steel material is supplemented, the length of the steel bar sleeve produced by it is: 16:40mm, 18:45mm, 20:50mm-55mm, 25:60mm, 28:70mm, 32:75mm. The above is the lenght requirement of rebar coupler, if you interest in other topic of rebar coupler, welcome to email us for your advice.

Matters need attention for rebar coupler connection: 1. The splice must be tightened with a torque wrench with an accuracy of ±5%, and it is required to verify the torque wrench with a torque meter every half year. The steel bar should be straightened before being cut. The end face of the thread rolling machine should be perpendicular to the axis of the steel bar, and there should be no horseshoe shape or deflection. 2. The taper, form, and pitch of the processed steel bar thread head must be consistent with that of the coupler, and pass the test of the supporting gauge. Water solution cutting lubrication fluid should be used when processing  taper thread rebar coupler . 3. When connecting the steel bar, the steel bar should be screwed into the mechanical splice on the positive axis, and then tightened with a torque wrench. When the embedded splice is used, the position, specification, and quantity of the coupler should meet the design requirements. The exposed end of the rebar couple

Rebar thread rolling machine   is mainly used for rolling straight thread head of ribbed steel in construction engineering, and it is an important equipment for rebar connection. It used to process HRB335 and HRB400 ribbed steel bars with a diameter of 16-40mm. Precautions for the use of steel wire rolling machine 1. The cooling liquid must use water-soluble emulsified cooling liquid, and it is strictly forbidden to use oil-based cooling liquid, and it is not allowed to use ordinary lubricating oil instead. The cooling liquid tank should be cleaned every month. 2. It is strictly forbidden to roll the thread when there is no coolant in machine. 3. The end of the steel bar to be processed should be flat and must be cut with a toothless saw, and should be round and straight within the length of 500mm at the end, no bending is allowed, and it is not allowed to directly process the end of the cutting machine. 4. The rolling machine should be maintained regularly.