In terms of structure and functions, the equipment consists of a frame, a power system, a flat-head device, a thread rolling mechanism, a feeding system, and a control system. The frame is made of rigid cast iron to ensure stability during processing; the power system is driven by a variable-frequency motor, which can adjust the rotation speed (usually 50-200r/min) according to the steel bar diameter; the flat-head device is equipped with cemented carbide tools, which can quickly remove burrs and bevels from the steel bar ends to ensure flatness (perpendicularity error ≤0.5mm); the thread rolling mechanism includes two or three thread rolling wheels with helical teeth, which cold-roll high-precision straight threads on the steel bar surface through relative rotation extrusion (thread precision reaches grade 6g, complying with GB/T 197-2003 standard); the feeding system is controlled by a hydraulic or servo motor to realize automatic feeding and discharging of steel bars; the control system adopts PLC programming, supporting manual/automatic mode switching. Some models are equipped with a digital display screen, which can display processing parameters (such as thread length, rolling pressure) in real time and have a fault alarm function.

In terms of application scope, the 50KF flat-head thread rolling machine can process hot-rolled ribbed steel bars (HRB400, HRB500, etc.) and smooth round steel bars with diameters of 16mm-50mm, compatible with the thread requirements of various sleeves such as standard type and reducer type. Its processing flow is: steel bar loading → positioning and clamping → flat-head device trimming the end → thread rolling wheel feeding and rolling threads → automatic discharging → finished product inspection. Compared with traditional split processing (first flat-head then thread rolling), its advantages are: first, high integration efficiency — the processing time for a single steel bar is only 30-60 seconds, reducing the time consumed by process conversion; second, controllable precision — the continuous flat-head and thread rolling processes avoid errors caused by secondary clamping, and the thread length tolerance can be controlled within ±1mm; third, easy operation — fully automatic processing can be completed through a foot switch or button, reducing the requirements for manual skills.

This equipment is widely used in large-scale projects such as high-rise buildings, bridges, and water conservancy projects, and is a key equipment to ensure the quality of steel bar straight thread connections. During use, the corresponding thread rolling wheels need to be replaced according to the steel bar diameter, and regular wear detection and lubrication of the thread rolling wheels are required to ensure that the thread profile is full and the size is accurate, meeting the requirements of Class Ⅰ joints in Technical Specification for Mechanical Connection of Steel Bars (JGJ 107-2016).