CNC Pipe Threading Machine

The spindle box is cast from high-performance iron, stress-relieved twice, and reinforced with dense ribbing for vibration resistance. Its large through-hole spindle uses imported tapered roller bearings, hydraulic cooling, and lubrication for rigidity and accuracy. The bed features a 45° slant guideway for optimal force distribution, spacious chip removal, and a closed-frame ribbed structure to resist bending and torsion. Cast from high-grade iron and treated for stress relief, it ensures cutting rigidity, machining precision, and long-term stability—ideal for heavy-duty pipe threading operations.

The three-axis feed system in Channel 1 uses imported INA ZARN heavy-duty needle-thrust cylindrical roller bearings to support each feed screw, providing high precision, rigidity, and load capacity. Grease lubrication ensures durability. The ball screw and feed motor are connected via a timing-belt reduction drive, increasing feed thrust compared to direct drive. A high-precision absolute encoder mounted at the ball screw end delivers real-time position feedback to the CNC, enabling full closed-loop control. This configuration ensures superior positioning accuracy and stable feed performance, making it ideal for demanding machining tasks. It is supplied as standard for Channel 1.

The front-and-rear clamping system uses dual hydraulic chucks to secure the steel pipe. Before final clamping, the front chuck activates a hydraulic motor that drives three centering jaws through a gear and multi-start screw mechanism. These jaws provide floating clamping and automatic centering, aligning the pipe with the spindle centerline. After centering, both chucks firmly grip the pipe. This dual-chuck design ensures stable two-point clamping, delivering excellent rotational stability and precision for high-quality threading operations.

The CNC pipe threading machine features a high-performance Turret system for speed, power, and precision. The upper Turret uses a five- or six-station hydraulic or servo-driven design for fast indexing, firm locking, and accurate positioning, while the lower Turret remains fixed and robust. Both support Capto C6 tooling for stable cutting. With five feed axes driving the upper Turret (X1/Z1), lower Turret (Y1), and Channel-2 Turret (X2/Z2), three Turrets can operate simultaneously. This layout accelerates turning and threading, reducing cycle times and boosting throughput. Built for demanding environments, it ensures productivity and reliability for OCTG pipe processing.

The CNC pipe threading machine features a high-pressure, high-flow coolant system that delivers emulsion directly through the tool head and tool-bar channels. This design targets the cutting edge for rapid cooling, extended tool life, and superior thread quality. A chip conveyor with a return pump filters and recycles coolant, while a level-monitoring device ensures consistent and stable operation during high-volume machining.

The CNC pipe threading machine offers multi-level safety protection across X, Y, and Z axes, including electrical, software, and mechanical limits to ensure safe, reliable operation. Stainless-steel telescopic covers fully enclose the bed and slideways, protecting guideways and ball screws from chips and coolant. A full sheet-metal enclosure prevents splashing and maintains a clean appearance. The front safety door features an interlock switch, while the electrical cabinet includes power-off protection when opened. All safety measures comply with CE standards, guaranteeing operator safety and stable performance for demanding OCTG pipe threading applications in continuous production environments.

The auxiliary handling system serves as the loading and unloading platform for steel pipes. It is composed of a pipe pre‑alignment unit, a pipe conveying roller table, a rotating roller support, a step‑beam lifting and shifting mechanism, a roller and support‑roller adjustment unit, and a servo feeding device. Together, these components provide stable support during machining and ensure efficient material transfer, including feeding the pipe into the machine and removing it after processing.