Upsetting straight-threaded steel bar connection technology is to first upset the end of the steel bar, make straight threads on the upsetting section, and then use the connecting coupler of the rib thread to connect the steel bar. The technology consists of steel upsetting technology and straight thread making technology. The cold heading process is the main method for upsetting. Through the cold heading process, not only the cross-sectional area of the end of the steel bar is enlarged, but also the yield and ultimate strength of the steel are improved after the steel bar is processed by cold heading, so as to ensure the high strength of the joint. on the strength of the steel base material.

The upsetting of the steel bar is realized by a special steel bar upsetting machine. On the upsetting section of the steel bar, a special steel straight thread threading machine is used to process the upsetting section of the steel bar to make a straight thread. The upsetting straight threaded steel bar joint has high strength, good quality of the steel wire head thread, and the overall quality of the joint is stable and reliable, suitable for various working conditions, especially suitable for long wire head type joints butt against steel cages.