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When we are considering manufatcure Mining Truck Bodies, like Truck Beds, Main Torque Beam, Shell Plate, Bridge Plate, it's always need to think about how to bending high tensile strength sheet material, like Hardox 400, Hard450, Hrdox 500, Bis80, Q&T80, Strenx 700, which these material are very hard for pressing, required big Die Opening when compared with mild steel bending application; If we choose small Radius top punch and small V die opening, then big 1000T, 1200T&1600T big CNC Bending Machine pressing small tip with high tensile strength material, the hard material will be cracked and will be hurt big press brake operator.
Normally these kind of Mining Truck bodies manufacture are considering to buy CNC Press brake over 1000T bending tonnage, big Radius top punch and Big V Die Opening will be serious required, products included Buckets Bending, Dump Bodies Bending , Underground Dump Bodies Bending , TYRE HANDLERS Bending, Water Tank Bending, Aust Bore Bending, Mainetrack bending production line and other ancillary products utilised in the mining industry.
There are also many Transportation Trailers company choose 6m,8m&12m large AHYW Yawei CNC Press brakes for bending full supplying trailers and other related products. Included Platforms Trailers Bending, Tipper Truck Bodies Bending, Tankers Truck Bodies Bending, Unique Trailers Bending, Livestock Trailers Bending , Under and Above ground Tankers Bending manufctures. Also for WASTE EQUIPMENT PROFESSIONALS manufactures using large and longer cnc press brakes, Cranes manufactures, UV LED Printed Sliding Curtains, Tarpaulins, Vehicle Wrapping, Cargo Nets, Anti-vandalism Mesh & Graphic Bending suppliers.
Analysis of the Application of Large Press Brakes in the Mining Truck and Excavator Manufacturing Industry and Considerations for Tooling Design and Manufacturing in Bending High-Strength Steel Plates
The mining truck and excavator manufacturing industry demands robust and durable components capable of withstanding extreme operational conditions. High-strength steel plates such as Hardox, Strenx, and Ramor are widely used due to their superior mechanical properties, including high yield strength, wear resistance, and impact toughness. However, bending these materials presents significant challenges, requiring specialized press brake machines and carefully designed tooling.
- The role of large press brakes in mining and excavator manufacturing.
- Key considerations in die design and manufacturing for high-strength steel bending.
- Common challenges and solutions in forming Hardox, Strenx, and Ramor steels.
2. Application of Large Press Brakes in Mining Truck and Excavator Manufacturing
2.1 Importance of Press Brakes in Heavy Equipment Fabrication**
Press brakes are essential in shaping structural components such as:
- Chassis and frames – Require high precision to ensure load-bearing capacity.
- Buckets and blades – Need wear-resistant bends to withstand abrasive materials.
- Protective armor plates – Must maintain structural integrity under impact.
Large press brakes (≥ 6,000 tons) are preferred due to their ability to handle thick plates (up to 50 mm) and long bending lengths (up to 12 m).
2.2 Advantages of High-Strength Steels in Mining Equipment
- Hardox Sheet Bending – Exceptional abrasion resistance for wear parts.
- Strenx Sheet bending – High strength-to-weight ratio for load-bearing structures.
- Ramor Plate bending – Optimized for ballistic and structural protection.
However, their high yield strength (up to 1,300 MPa) increases springback and requires higher bending forces.
3. Tooling Design and Manufacturing Considerations for Bending High-Strength Steel
3.1 Die Material Selection**
- Tool Steel Grades (e.g., D2, A2, H13)** – Must withstand high pressure without chipping.
- Carbide Inserts – Used for extreme wear resistance in high-volume production.
- Heat Treatment– Hardening (HRC 58-62) improves durability.
3.2 Die Geometry Optimization**
- Wider Die Openings (V-die width ≥ 8× material thickness) – Reduces cracking risk.
- Reduced Punch Tip Radius– Minimizes material stress concentration.
- Multi-Step Tooling– For complex bends in ultra-high-strength steels.
3.3 Press Brake Machine Requirements
- High Tonnage Capacity – To counteract material resistance.
- Crowning Compensation – Ensures uniform bending across long parts.
- CNC Precision Control – Critical for repeatability in high-strength steel forming.
4. Challenges and Solutions in Bending Hardox, Strenx, and Ramor Steels
4.1 Excessive Springback**
Problem: High-strength steels exhibit greater elastic recovery, leading to inaccurate bends.
Solutions:
- Overbending Compensation – Adjust bend angle based on springback prediction.
- Bottoming Technique– Applies additional force to minimize elastic return.
- Adaptive CNC Algorithms– Automatically corrects for springback in real time.
4.2 Edge Cracking and Fractures
Problem:Brittle behavior in high-hardness steels causes cracks at bend radii.
Solutions:
- Preheating (150-300°C) – Reduces brittleness in Hardox 500+ grades.
- Larger Bend Radii (R ≥ 2× thickness) – Lowers stress concentration.
- Laser or Plasma Cutting Edges – Smoother edges reduce crack initiation points.
4.3 Tool Wear and Surface Defects
Problem:Abrasive steel grades accelerate die wear, leading to poor surface finish.
Solutions:
- Lubrication (Polymer-based or EP additives) – Reduces friction and galling.
- Polished Tool Surfaces – Minimizes adhesion wear.
- Regular Tool Inspection– Prevents defects from worn dies.
Case Study: Successful Implementation in Mining Equipment Production**
A leading excavator manufacturer switched to a 9,000-ton CNC press brake with crowning control for bending Strenx 700 plates. By implementing:
- Custom carbide tooling** (V-die width = 10t).
- Laser-cut prepped edges.**
- Springback-compensated CNC programs.
They achieved:
-30% reduction in scrap rate.
- 15% improvement in dimensional accuracy.
Bending high-strength steels like Hardox, Strenx, and Ramor requires advanced press brake technology and optimized tooling design. Key strategies include:
- Selecting durable die materials and geometries.
- Compensating for springback and edge cracking.
- Using precision-controlled CNC press brakes.
As mining and construction equipment evolves toward higher-strength materials, manufacturers must invest in modern bending solutions to maintain competitiveness.
- SSAB Hardox® Technical Manual.
- Strenx® Performance Steel Datasheets.
- Journal of Materials Processing Technology (Bending High-Strength Steels).
AHYW Yawei factory is professional CNC Pressbrakes supplier from China, which can meet all your sheet metal bending requirements, small pressbrake from 30T Mini brakes to 6000T Large CNC Pressbrakes, bending material length covered 1m to 15 M.
AHYW China Hardox sheet bending machinery supplier 1000T6M
AHYW Yawei China Strenx Bending machinery manufactures 1200t6m
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