In today's increasingly sophisticated construction industry, precise rebar processing forms the foundation for ensuring both project quality and timelines. Disk-type rebar bending machines have emerged as essential tools designed to meet the demands of circular and special-shaped steel reinforcement bending.
Modern bending machines combine exceptional torque stability, precise angle control, and long-term durability. The market offers solutions ranging from compact manual models to highly automated CNC bending machines, allowing contractors to select equipment based on rebar dimensions, speed requirements, and budget considerations.
Contemporary rebar bending machines incorporate multiple technological advancements to maximize both production efficiency and construction quality:
- Versatile processing capacity: Capable of bending round rebars up to 60mm in diameter and threaded bars up to 50mm, allowing single-machine solutions for multiple rebar specifications.
- High-speed operation: Capable of achieving up to 12 bends per minute, ensuring project timelines are maintained whether on-site or in fabrication facilities.
- Precision engineering: Incorporates high-hardness disks, positioning pins, and accurate angle-setting mechanisms. CNC models feature program storage and springback compensation for enhanced accuracy.
- Robust industrial design: Features thick steel plate welded frames, high-quality industrial reducers, and copper-wound motors (3.0–5.5 kW) operating at 1440 rpm with standard 380V three-phase power.
- Operator-friendly features: Includes clear angle-setting interfaces, foot switches, quick-change pin designs, comprehensive safety guards, and emergency stop buttons.
- Low maintenance requirements: Designed with accessible lubrication points, replaceable pins, and clearly labeled electrical components to minimize downtime.
The core functionality of these machines relies on powerful drive systems and precision bending mechanisms:
- Power transmission: Motors drive heavy-duty turntables through high-quality worm gear reducers, delivering low-speed, high-torque output capable of handling large-diameter rebar.
- Positioning and bending: Rebars are placed against lateral stops while center pins (mandrels) establish the inner bending diameter. Rotating bending pins form the rebar around the mandrel.
- Angle control: Rotation is precisely controlled through mechanical limit stops or limit switches, with automatic stopping at preset angles. Some models feature reverse rotation for workpiece release.
- Radius and angle adjustment: Bending radius is adjusted by changing mandrel diameters and bending pin positions. Jog/forward-reverse controls enable fine angle adjustments and compensate for material springback.
| Model | Round Rebar Capacity (mm) | Threaded Rebar Capacity (mm) | Bending Speed (cycles/min) | Motor Power (kW) | Voltage | Motor Speed (rpm) | Dimensions (mm) | Weight (kg) | Control Type |
|---|---|---|---|---|---|---|---|---|---|
| 40 | ≤ 32 | ≤ 28 | 12 | 3.0 | 3-phase 380V | 1440 | 810×760×830 | 220 | Manual |
| 40H | ≤ 34 | ≤ 32 | 12 | 3.0 | 3-phase 380V | 1440 | 830×770×830 | 255 | Manual |
| 45 (CNC) | < 40 | ≤ 34 | 12 | 4.0 | 3-phase 380V | 1440 | 850×750×830 | 300 | CNC |
| 60 (CNC) | < 60 | < 50 | 12 | 5.5 | 3-phase 380V | 1440 | 1050×870×900 | 425 | CNC |
Note: Specifications represent standard configurations. Customization available for voltage, pins, and processing capacity.
Modern bending machines serve critical functions across various construction scenarios:
- Structural component fabrication: Producing L-bars, U-bars, hooks, stirrups, and multi-angle special-shaped rebars for beams, columns, slabs, and foundations.
- On-site and shop operations: Facilitating efficient daily bending tasks through simple setup and quick changeover capabilities.
- Prefabrication and production lines: Integrating with straightening and cutting equipment to create automated production workflows.
Key considerations for equipment selection include:
- Maximum processing diameter: Primary selection criterion based on project requirements for both round and threaded rebars.
- Production targets: CNC models suit high-volume repetitive bending, while manual/semi-automatic versions offer flexibility for mixed production.
- Power and space requirements: Verification of 380V three-phase power availability and assessment of equipment footprint and weight.
- Tooling and compliance: Preparation of appropriate pin sets and spacers to meet structural design specifications and building codes.
The construction industry continues to benefit from technological advancements in rebar processing equipment, with bending machines playing a pivotal role in ensuring structural integrity and project efficiency.
