STON Automatic Bending Machine Series A2, B2, C2, D2, F2

1. Vacuum Clamping Technology eliminates misalignment during high-speed bending. It is especially superior in handling ultra-thin workpieces (from 0.15mm), perfectly protecting mirror stainless steel or painted aluminum surfaces.

2. Breakthrough Operational Performance: The device achieves a record speed of 0.2 seconds/bend.

3. Intelligent Control System & High-end Sensors: The automatic thickness compensation feature allows the machine to automatically adjust the tool travel based on the actual thickness of each workpiece, eliminating material errors.

4. Industrial Heavy-Duty Mechanical Construction: The machine body made of QT500-7 cast iron is heat-treated and aged to prevent permanent deformation.

5. Stability in Harsh Environments: Ensures the machine maintains stable 24/7 operation in tropical factory environments.

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STON Automatic Bending Machine Series A2, B2, C2, D2, F2

I. MANUFACTURER

Qingdao Shengtong Mechanical Technology Co., Ltd. (STON), established in 2006, is a national high-tech enterprise in China and a pioneer in the research and manufacturing of CNC sheet metal processing equipment. With a factory complex spanning 20,000m², STON operates under an in-house production model, ensuring all outgoing equipment reaches optimal mechanical stability and precision.

Qingdao Shengtong Mechanical Technology Co., Ltd. (STON)

The STON A2, B2, C2, D2, F2 **automatic bending machine series** is suitable for standard bending processes with high flexibility and a heavy frame structure that helps reduce vibration for heavier tasks.

With a bending speed of up to 0.2 seconds per bend, a STON A2, B2, C2, D2, F2 machine can achieve productivity equivalent to 6 hydraulic press brakes operating simultaneously, helping businesses optimize labor costs and significantly shorten production cycles.

II. Outstanding Features of STON Bending Series

1. Rigid Mechanical Workpiece Clamping Technology

Suitable for standard bending processes with high flexibility; the heavy frame structure helps reduce vibration for heavier tasks.

2. Superior Operational Performance

Maximum productivity: Capable of performing over 5,000 bends per day, increasing efficiency by up to 260% compared to older methods.
Complex profiles: Flexibly handles everything from circular arcs, dead edge folding, and closed bending to special shapes without manual tool changes.

3. Intelligent Control System & High-end Sensors

Closed-loop Servo System: Utilizes Servo electric motors imported from TRIO (UK origin), enabling real-time motion synchronization with micrometer precision.
Bias Load Detection: Combined with an optical Grating Ruler to detect workpiece misalignment, protecting the tooling system and minimizing scrap.
Automatic Thickness Compensation: The machine automatically measures and adjusts the tool stroke based on the actual thickness of the metal sheet during each clamping.

4. Industrial Mechanical Construction

Ultra-rigid machine body: The machine frame is cast from QT500-7 iron, undergoing natural aging and high-temperature heat treatment processes to eliminate stress, ensuring no deformation over the years.
Copper tube lubrication system: Utilizes high-pressure copper oil lines, which are durable and offer superior leak resistance compared to standard PVC plastic tubes.
42CrMo Alloy Steel Bending Tools: Pressure-forged and laser-hardened to ensure exceptional hardness and wear resistance.

5. Optimized Design for Harsh Environments

Dedicated electrical cabinet air conditioning: An integrated cooling system helps maintain a stable temperature for electronic components and servo drivers, ensuring 24/7 machine operation even in hot workshop environments.

III. BENDING PROFILES WITHIN MACHINE CAPABILITY

bending profile

IV. Ideal Applications of STON A2, B2, C2, D2, F2

This product is the top choice for industries requiring high aesthetics and precision:

Electrical equipment: Medium-low voltage electrical cabinet shells, transformer stations, and Server network racks.
Premium appliances: Stainless steel kitchen equipment, washing machine shells, and specialized refrigerators.
Architecture & Elevators: Elevator panels, large-format decorative panels.
New technologies: Electric vehicle (EV) battery casings, solar energy components.
Fireproof doors: Various types of fireproof doors with complex profiles

production application of automatic bending machine

Technical Specifications	Unit	Model STON-A2	Model STON-B2	Model STON-C2	Model STON-D2	Model STON-E2
Maximum bending length	mm	1000*1000	1400 (1600)*1250	2000*1500	2500*1500	3200*5100
Maximum bending height	mm	170 mm/ 300 mm (opt)	170 mm/ 300 mm (opt)	170 mm/ 300 mm (opt)	170 mm/ 300 mm (opt)	170 mm/ 300 mm (opt)
Minimum 4-side forming size	mm	140 x 190	140 x 190	140 x 190	140 x 190	140 x 190
Minimum 1-side forming size	mm	140	140	140	140	140140
Minimum material thickness	mm	0.15	0.15	0.15	0.15	0.15
Maximum thickness - Stainless steel	mm	1.2	1.2	1.2	1.2	1.2
Maximum thickness - Cold-rolled steel	mm	2.0	2.0	2.0	2.0	2.0
Maximum thickness - Aluminum	mm	2.5	2.5	2.5	2.5	2.5
Maximum bending speed	mm	0.2 seconds/bend	0.2 seconds/bend	0.2 seconds/bend	0.2 seconds/bend	0.2 seconds/bend
Feeding method		Mechanical clamping	Mechanical clamping	Mechanical clamping	Mechanical clamping	Mechanical clamping
Machine dimensions (L x W x H)	mm	3700 x 1500 x 2800	4500 x 2000(2200) x 2800	5100 x 2700 x 2800	5700 x 3100 x 2800	7000 x 3800 x 2800
Rated voltage	V	380V	380V	380V	380V	380V
Feeding table		Bristle brush, omni-directional ball transfer	Bristle brush, omni-directional ball transfer	Bristle brush, omni-directional ball transfer	Bristle brush, omni-directional ball transfer	Bristle brush, omni-directional ball transfer

Component Name	Description & Technical Specifications	Illustration
Machine Body	Constructed from high-grade QT500-7 cast iron or Q235 welded steel. Undergone annealing and aging treatments, with precision CNC machining. Ensures structural rigidity, long-term stability, and high durability for the machine.
Bending Tools	Forged from 42CrMo material, undergone quenching and heat treatment. Ensures long service life, consistent bending force, and superior wear resistance.
Control System	All-electric closed-loop servo system supporting simultaneous linkage of up to 25 axes. Features an open interface for robot connection. Allows precise synchronization, real-time monitoring, and easy upgrades to smart automated production lines.
Servo Motors	Utilizes high-torque servo motors (optional imported or domestic brands). Signal transmission via Bus communication. Ensures real-time response, prevents data loss, and maintains high stability during operation.
Lubrication System	Automatic copper pipeline design. More durable than traditional plastic tubes, ensuring timely lubrication for ball screws and guide rails, reducing mechanical wear.
Grating Ruler Detection	Bias load detection system. Protects the machine from overload and reduces rejects caused by misaligned or incorrectly positioned bends.
Cooling System	Equipped with a specialized air conditioner for the electrical cabinet. Prevents overheating and ensures stable system operation in high-temperature factory environments.
Electric Hinge	Electric-operated hinge system, providing gentle contact with the workpiece. Unlike gravity hinges, it prevents scratches or dents on sensitive workpiece surfaces during high-speed folding.
Electrical Components	Uses international brands with high anti-interference capability. Supports Ethernet connectivity. Enables remote fault diagnosis and rapid troubleshooting via the network.
Handwheel	Manual handwheel allows for fine-tuning of the tool position. Helps reduce waste during machine setup and prevents tool damage due to operational errors during inspection.
Disturbance Compensation Design	Technology to compensate for deviations caused by material thickness or workpiece length. Minimizes angle and straightness errors across different sheet metal sizes.
Optional Components	- Auxiliary Knives: For complex shapes. - C-Axis Up/Down: Supports downward folding and safe tool retraction. Expands processing capabilities for non-standard or multi-process parts.