Description of Rebar Upsetting Sleeve For Steel Bar

The upsetting sleeve connection is to use a special upsetting machine to pre-upset the section of the steel bar to be processed so that the diameter of the steel bar in this processing section is increased, and then use a special threading machine to process the upsetting part. The diameter of the sleeve wire is infinitely adjustable. When connecting, use an ordinary construction wrench to upset the straight screw to connect the straight thread sleeve to the thread at the end of the steel bar to complete the butt joint of the steel bar. The upsetting and other strong straight thread connection technology has the advantages of stability, and the strength of the joint is greater than that of the base metal of the steel bar.

Advantages of Rebar Upsetting Sleeve For Steel Bar

1. High strength: The net cross-sectional area of the steel bar in the upsetting section after cutting the thread is still larger than the original steel bar cross-sectional area, that is, the thread does not weaken the cross-section, thereby ensuring that the joint strength is greater than the strength of the steel bar base material.
2. Stable performance: The strength of the joint is not affected by the tightening torque, and the looseness of the thread or less screwing in 2 to 3 buckles will not significantly affect the strength of the joint, eliminating the influence of the quality of workers and force measuring tools on the performance of the joint.
3. Fast connection speed: the straight thread sleeve is about 40% shorter than the tapered thread sleeve, the pitch of the threaded thread is large, and the threaded thread is less, which speeds up the connection speed.
4. Wide range of applications: It can also be used separately in occasions where the bending steel bar, the fixed steel bar, and the steel cage cannot be rotated.
5. Economical: The straight thread joint saves 70% more steel than the extrusion connection, and 35% less steel than the tapered thread joint, and the comprehensive technical and economic benefits are good.
6. Easy to manage: straight threaded steel bar joints are processed in a unified work site, and flow operation.

Technical Parameters of Rebar Upsetting Sleeve For Steel Bar

Upsetting sleeve operation points:
1. Flat head at the end of the steel bar: After straightening the steel bar, use a grinding wheel cutter or special cutting equipment to cut the material. It is required that the end face of the steel bar is perpendicular to the axis of the steel bar, the end is not allowed to bend, and there must be no horseshoe shape. If the end of the steel bar is unqualified, the end shall be cut off with a grinding wheel cutting machine.
2. Upsetting test: Before each batch of steel bars enter the site for processing, an upsetting test should be done, and the final value of the optimal upsetting pressure and shortening amount should be determined based on the qualified upsetting amount.
3. Initial upsetting: Before upsetting, the upsetting machine should first return to zero position, then insert the steel bar from the front end, tighten it, and then press the oil pump. First, select an initial upsetting pressure for upsetting.
4. Determine the best parameters: check the upsetting finished products processed by the upsetting experiment, mainly check whether the upsetting base circle diameter, upsetting length, upsetting shortened size, etc. meet the requirements, and adjust the upsetting pressure according to the inspection results, The qualification rate of finished products until upset is not less than 95%, so as to determine the best parameters.