| Item | Content |
|---|---|
| Customer | BaoTi Group Co., Ltd. |
| Country | China |
| Industry | Composite Plate Manufacturing |
| Application | Titanium & Nickel Alloy Plate Heat Treatment |
| Equipment | 11-Roll Plate Levelling Machine |
| Levelling Range | 6-30 mmx1,000-3,200 mm |
| Maximum Plate Width | 3,200 mm |
| Maximum Plate Length | 14,000 mm |
| Material Yield Strength | ≤750 MPa |
| Working Rolls | 11 Rolls - 5 Upper / 6 Lower |
| Working Rolls Drive | All 11 Rolls Driven |
| Machine Weight | Approx. 300 tons |
BaoTi Group is one of China's leading enterprises specializing in the research, development and manufacturing of titanium and titanium alloy products.
For high-performance alloy plates, heat treatment is an important part of the manufacturing process. Annealing, solution heat treatment and quenching can introduce deformation into the plate, making subsequent levelling essential.
For BaoTi Group's heat treatment production line, EZHONG supplied the 11-roll plate levelling machine and associated auxiliary equipment, designed for plates 6-30 mm thick, 1,000-3,200 mm wide and up to 14,000 mm long, with yield strength up to 750 MPa.
For this project, the customer required a solution capable of providing:
EZHONG supplied an 11-roll plate levelling machine with auxiliary feeding, alignment, conveying, hydraulic and electrical systems for BaoTi Group's heat treatment production line.
| Item | Specification |
|---|---|
| Equipment | 11-Roll Plate Leveling Machine |
| Levelling Specification | 6-30x3,200 mm |
| Maximum Plate Thickness | 30 mm |
| Minimum Plate Thickness | 6 mm |
| Maximum Finished Plate Width | 3,200 mm |
| Maximum Plate Length | 14,000 mm |
| Material Yield Strength | ≤750 MPa |
| Applicable Materials | Nickel & Nickel Alloys / Titanium & Titanium Alloys |
| Levelling Temperature | Room Temperature / Intermittent 500-980°C |
| Levelling Accuracy | ≤3 mm/m |
| Working Roll Diameter | Ø220 mm |
| Working Roll Pitch | 230 mm |
| Working Rolls | 11 |
| Working Roll Drive | All 11 Rolls Driven |
| Working Roll Material | 60CrMoV |
| Working Roll Surface Hardness | HRC58-65 |
| Working Roll Effective Length | ≥3,300 mm |
| Backup Roll Material | 42CrMo |
| Backup Roll Surface Hardness | HRC46-54 |
| Frame Structure | High-Strength Pre-Stressed Frame |
| Levelling Speed | 3-12 m/min, variable frequency |
| Main Control System | Siemens S7-1500 PLC |
| HMI | Siemens WinCC |
| Machine Dimensions | Approx. 9.76 x 3.86 x 6.51 m |
| Installed Capacity | Approx. 400 kW |
| Total Weight | Approx. 300 tons |
The machine adopts an 11-roll configuration with 5 upper rolls and 6 lower rolls. The relatively dense roll arrangement provides multiple controlled deformation points across the plate, supporting stable correction of residual deformation in wide alloy plates.
Unlike passive-roll configurations, all 11 working rolls are actively driven. The main transmission uses two AC variable-frequency motors, a hardened gear distribution gearbox and universal shafts to drive the working rolls.
The frame consists of the machine bases, columns, covers and tie rods forming a closed structure. Four pre-stressed tie rods are used to improve overall frame strength and rigidity. Maximum elastic deformation under load: ≤0.24 mm.
High-precision displacement sensors monitor the working-roll position, with a display accuracy of ±0.05 mm. The PLC performs closed-loop control of the roll gap to achieve accurate positioning and zero calibration.
The upper backup rolls use adjustable wedges, allowing the operator to compensate for work-roll deflection and improve the levelling of plates with uneven transverse deformation across the plate width.
For a production line operating three shifts per day, the machine is equipped with a hydraulic fast roll-changing system. The lower roll set can be hydraulically pulled out from the machine frame for quick replacement.
On-site Roller View
Commissioning Adjustment
Site Machine Overview
Customer‑site Layout
Field Installation Work
Trial‑run Plate Leveling
EZHONG provides heavy-duty multi-roll levelling machines engineered around plate thickness, width, material strength, production speed and required flatness, with the option to integrate the machine into a complete automated production line.
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