Precision Roll Forming Solution for Infrastructure and Mining Applications
To meet these engineering demands with high efficiency, Zhongtuo proudly offers the Pipe Joint Grouting Bolt Machine, a fully automated and intelligent production line designed for forming C-profile bolt pipe joints with remarkable speed, precision, and consistency.
What Is the Pipe Joint Grouting Bolt Machine?
The Pipe Joint Grouting Bolt Machine is a cold roll forming line engineered to transform low-carbon steel strips into grouting bolt joints — hollow steel anchor components used for injecting grout into rock or soil structures. The bolts not only stabilize surrounding material but also form an integral part of modern geotechnical and mining engineering systems.
This advanced roll forming solution covers the complete workflow: uncoiling, shearing, automatic welding, material accumulation, punching, precision forming, servo flying cutting, and output stacking — all in one smooth, efficient process. Controlled by a centralized PLC system, the entire production can be managed by a single operator, reducing labor cost and human error.
Key Features of the Pipe Joint Grouting Bolt Machine
1. High-Speed, High-Precision Forming
With a maximum line speed of 45 meters per minute, this machine is capable of mass-producing bolt pipes while maintaining strict dimensional tolerances. It’s suitable for forming pipes with diameters from Φ33mm to Φ47mm, widths between 60mm and 120mm, and thicknesses ranging from 2.0mm to 3.5mm.
2. Automatic TIG Welding
The integrated TIG butt welding system ensures smooth, strong joints between steel coils with minimal deformation. This system includes edge preparation, foot-pedal control, and programmable arc adjustments, delivering perfect welds without the need for grinding or polishing.
3. Precision Punching Without Halting
Hydraulically driven punching equipment allows for non-stop hole punching during production. This is ideal for creating grout outlets, identification slots, or any custom hole design as specified by your project.
4. Robust Forming Section
The core of the machine features 14 horizontal and 3 vertical roll stations, built from hardened 42CrMo shafts and cast steel housings. The forming rollers are made from Cr12 steel with a surface hardness of HRC58–62, ensuring long-term wear resistance.
5. Servo Flying Cutting System
Using a servo motor and hydraulic cutting die, the machine provides on-the-fly cutting at speeds synchronized with material output. It ensures burr-free, precise cutting of each grouting bolt pipe to the desired length (500–3000mm) with accuracy up to ±1mm.
6. Smart Control System
A fully digital PLC + HMI interface lets users monitor production data, adjust sizes, set punching intervals, and track machine performance in real time. Manual and automatic modes are available for debugging and continuous production, respectively.
Technical Specifications at a Glance
| Parameter | Specification |
|---|---|
| Material | Low carbon steel (ASTM A1011 Grade 60 max) |
| Thickness | 2.0mm – 3.5mm |
| Width | 60mm – 120mm |
| Pipe Joint Diameter | Φ33 – Φ47mm |
| Cutting Length | 500mm – 3000mm |
| Line Speed | 0 – 45m/min |
| Cutting Accuracy | ±1mm |
| Installed Power | Approx. 100kW |
| Line Length | Approx. 45 meters |
| Control Voltage | 440V / 60Hz / 3 Phase |
| Hydraulic Cooling | Air cooled |
| Max Coil Weight | 3 tons |
Component Breakdown of the Full Production Line
Hydraulic Double-Head Decoiler – Smooth coil loading and switching, suitable for 3-ton coils.
Shear & TIG Welder – Edge alignment and smooth seam joining for continuous production.
Horizontal Spiral Accumulator – Material buffer up to 600m for uninterrupted forming.
Punching & Leveling Unit – In-line servo punching for logo, slots, and functional holes.
Pipe Joint Grouting Bolt Machine (Forming Mill) – Multi-pass forming with hardened rollers and universal joints.
Servo Flying Cutter – Continuous cutting without production stop.
Run-Out Table – Final product support with optional packing station.
Electric Cabinet & PLC – User-friendly Siemens or Mitsubishi control system.
Hydraulic Power Pack – Reliable Ward components with integrated pressure balancing.
Safety Guarding System – Covers, sensors, and emergency stop circuits ensure operator safety.
Application Fields of Pipe Joint Grouting Bolts
Tunnel excavation and support systems
Mining shaft reinforcement
Hydro and dam foundations
Mountain slope stabilization
Underground subway and rail projects
Rock and soil anchoring systems
These bolts serve a dual purpose: as temporary supports during construction and as permanent anchors when used with cementitious grouting.