① 450 Type Slitting Line – Main Technical Parameters
1、Raw Material Parameters：
| No. | Item | Technical Data |
| 1 | Raw Material | Galvanized sheet; Cold rolled sheet |
| 2 | Sheet Thickness | 0.25–1.6 mm |
| 3 | Sheet Width | ≤ 360 mm |
| 4 | Coil Outside Diameter | ≤ Φ1600 mm |
| 5 | Coil Inside Diameter | Φ508 mm |
| 6 | Max Coil Weight | 5 T |
| 7 | Mechanical Property | Tensile strength σb ≤ 600 N/mm² |
| 8 | Mechanical Property | Yield strength σb ≤ 490 N/mm² |
2、Finished Product Parameters：
1）Slit Coil Parameters
| No. | Item | Technical Data |
| 1 | Coil Inside Diameter | Φ300 mm; Φ400 mm (with diameter increasing plate) |
| 2 | Coil Outside Diameter | ≤ Φ1600 mm |
| 3 | Max Coil Weight | 5 T |
| 4 | Number of Strips | Thickness 0.25–1.6 mm ≤ 36 strips |
| 5 | Min Slitting Width | 10 mm (related to knife thickness) |
| 6 | Width Tolerance | ≤ ±0.05 mm |
| 7 | Scrap Edge Width | 2–10 mm |
| 8 | Burr Height | ≤ 0.03 mm (with new blades in optimal installation condition) |
| 9 | Slitting Straightness | For slit width ≤ 30 mm: ≤ 0.8/1 m; For slit width > 30 mm: ≤ 0.5/1 m (10 m head & tail excluded) |
- Equipment Line Parameters：
| No. | Item | Technical Data |
| 1 | Shearing Line Speed | 0–120 m/min (stepless speed regulation) |
| 2 | Threading Speed | 0–15 m/min |
| 3 | Power Supply | 380 V / 50 Hz / 3 Ph |
| 4 | Installed Capacity | Approx. 130 kW |
| 5 | Operators | 1 skilled worker + 1–2 general workers |
| 6 | Floor Space | Length 18 m × Width 6 m |
| 7 | Running Direction | From ( ) to ( ) when facing the operation console |
| 8 | Equipment Color | To be determined |
- Equipment-related components：
| No. | Equipment / Component | Quantity | Remarks / Power |
| 1 | Loading Trolley | 1 unit | — |
| 2 | Cantilever Uncoiler + Decoiler | 1 set | AC 11KW |
| 3 | Bridge #1 (Floating Type) | 1 unit | — |
| 4 | Side Guiding Device | 1 unit | — |
| 5 | Slitting / Shearing Machine | 1 set | AC 45KW |
| 6 | Scrap Edge Winder | 1 set | 3KW (2 units) |
| 7 | Bridge #2 (Floating Type) | 1 set | — |
| 8 | Tensioner | 1 set | — |
| 9 | Recoiler (with Separation Frame) | 1 set | AC 55KW |
| 10 | Unloading Trolley | 1 unit | — |
| 11 | Hydraulic System | 1 set | AC 7.5KW |
| 12 | Pneumatic System | 1 set | — |
| 13 | Electrical System | 1 set | — |
- Equipment Features and Functional Description：
1、Feeding Car
| Parameter | Specification |
| Structure / Type | Heavy-duty frame, welded steel, hydraulic and motor control |
| Quantity | 1 unit |
| V-shaped Surface | Nylon plate + welded steel |
| Load Capacity | 5T |
| Lifting Stroke | 600 mm |
| Driving Power | Motor |
Structure and Function:
Used to feed the decoiler, transporting steel coils from the storage platform to the decoiler shaft. Travel is controlled by a hydraulic motor, lifting is controlled by a hydraulic cylinder.
Lifting Mechanism: Hydraulic cylinder with sliding four-column guide structure provides lifting power, moving the V-shaped coil platform up and down to handle coils.
Travel Mechanism: Hydraulic motor with parallel guide rails drives the car along the decoiler shaft. Limit blocks at both ends prevent derailment.
2、Cantilever Decoiler + Uncoiler
| Parameter | Specification |
| Structure / Type | Welded steel frame, hydraulic expanding core shaft |
| Quantity | 1 unit |
| Load Capacity | 5T |
| Coil Inner Diameter | Φ508 mm |
| Coil Outer Diameter | Max: Φ1600 mm |
| Uncoiler Drum Structure | Arc plate structure |
| Arc Plate Expansion Range | Φ470 mm – Φ520 mm |
| Arc Plate Material | 45# cast steel (surface chrome-plated and polished) |
| Uncoiler Brake | 2 sets of disc brakes |
| Pay-off Method | Passive feeding |
| Power | 11KW motor |
3、Uncoiling and Coil Pressing / Uncoiling Device
- Function：
Supports steel coils, expands the inner diameter, feeds or recovers material, and provides tension. Composed of frame, main shaft, expanding shaft, unwinding pressure device, auxiliary supports, brake system, and power unit.。
- Construction
- a) Main Frame:Welded from steel profiles, A3 plates, and #45 forged bearing seats; annealed to prevent deformation; bearing seats machined to ensure shaft concentricity.
b) Main Shaft:40Cr steel, 85mm through-hole, quenched and tempered, diameter 190mm, load capacity 10T.
c) Expanding Shaft: Slide-type push-pull expansion; four arc plates (45# steel) with line-cut sliders; expansion Φ470–520mm; working length 850mm; core shaft ensures concentricity; surface chrome-plated.
d) Unwinding Pressure Device: Composed of pressure roller, support arm, hydraulic cylinder; roller coated with polyurethane to prevent material from loosening; support arm moves via hydraulic cylinder.
e) Brake System: Pneumatic disc brake with adjustable force; locks when stopped to prevent coil backlash. Synchronized with feed control.
f) Hydraulic Power: Push-pull expanding shaft driven by hydraulic cylinder Φ150×150mm; lifting cylinder Φ80×220mm.
g) Electrical Power: 11KW AC motor with closed gearbox.
5、Transfer Bridge (Floating)：
| Parameter | Specification |
| Structure / Type | Frame and transfer support welded from steel plates, transfer rollers covered with rubber |
| Quantity | 1 unit |
| Live Table (Length × Depth) | 3000 mm × 3500 mm |
Function:
Controls and buffers steel strip speed between slitting machine and feeder. Nylon-covered surface prevents coil scratching. Three pairs of photo-eyes monitor strip position in the floating pit, maintaining sufficient storage.
6、Edge Guiding and Pressure Device：
| Parameter | Specification |
| Structure / Type | Frame and transition support welded steel, transition rollers covered with rubber |
| Quantity | 1 unit |
| Adjustable Table (L × W) | 3000 mm × 3500 mm |
| Table Lifting Method | Hydraulic cylinder supported lifting |
Function:
Positions steel strips laterally to prevent deviation. Vertical rollers on both sides move along guide rails via hydraulic cylinders. Hardened and chrome-plated for wear resistance.
6、Slitting Line
| Parameter | Specification |
| Structure / Type | Welded steel base, power gearbox, gantry, and frame |
| Quantity | 1 set |
| Slitting Speed | 120 m/min |
| Knife Shaft Diameter | Φ100 mm × 450 mm (keyless) |
| Material | 42CrMo |
| Knife Disc Size | Φ200 mm × Φ100 mm × 5 mm (OD × ID × Thickness) |
| Main Motor Power | AC 45 kW |
Function:
Slits wide steel coils into various widths. Interchangeable spacer sleeves allow flexible width adjustment. Blade gap adjustment via fixed lower shaft and worm gear for upper shaft. Side-opening frame facilitates blade replacement.
7、Edge Scrap Rewinde：
| Parameter | Specification |
| Structure / Type | Frame welded from steel plates; left and right independent over-material integrated structure; composed of winding shaft, pressure shaft, and transmission; controlled by hydraulic cylinder for easy unloading |
| Quantity | 2 units |
| Winding Scrap Width | 2–10 mm per side |
| Winding Speed | 0–120 m/min |
| Maximum Winding Weight | 150 kg |
| Main Motor Power | AC 3 kW × 2 |
| Expansion / Contraction | Mechanical |
Function:
Collects edge scrap from slitting. Motor-driven, with hydraulic ejection for stable operation.
8、Transfer Bridge (Floating)：
| Parameter | Specification |
| Structure / Type | Frame and transition support welded from steel plates; transition rollers are rubber-coated |
| Quantity | 1 unit |
| Active Table (Length × Depth) | 3000 mm × 5000 mm |
| Table Lifting Method | Supported and lifted by hydraulic cylinder |
| Tail Plate | Prevents sheet material from falling into the pit and getting damaged |
Function:
Controls and buffers steel strip speed between slitting machine and rewinder. Nylon surface prevents coil damage.
9、Pre-Separation & Tension Machine：
| Parameter | Specification |
| Structure / Type | Welded steel base and frame |
| Quantity | 1 set |
| Separator Plate Size | Φ80 × Φ180 × 3 |
| Separator Sleeve Size | Φ80 × Φ110 × & |
| Middle Pressure Roller | Vertical lifting |
Function:
Separates slit strips, preventing overlapping during tensioning, and ensures uniform rewinding. Discs removable for cleaning or replacement.
| Parameter | Specification |
| Structure / Type | Welded steel base and frame, including braking system |
| Quantity | 1 unit |
| Pressure Plate Type | Pressure plate driven by hydraulic cylinder to achieve desired downward tension |
Function:
Positions steel strips and applies uniform tension to each strip for rewinding. Tension determines the tightness of the coil and ensures neat winding. The system consists of main frame, front separation frame, pressure unit, rear separation frame, tension table, and guide rollers.
B、Construction：
Main Frame: Welded from profiles and steel plates, annealed and machined for reference surfaces.
Front Separation Frame: Independent guide-rail type; connected to main frame with two chrome-plated guide rods. Separation plates mounted on removable shafts for easy replacement. Frame equipped with hydraulic cylinder for vertical movement and adjustable stopping positions.
Tension Table: Composed of side plates, upper gantry, lower/upper pads, hydraulic cylinders. Wool felt fixed on pads; steel strip passes between pads and is pressed to generate tension. Upper pads driven synchronously by two hydraulic cylinders.
10、Guide Rollers & Tray Device:
Guide Rollers: Bearing-mounted, seamless steel tube with PU coating; dynamically balanced to guide strips into rewinder.
Tray Device: Hydraulic-driven lifting to guide strip head into rewinder.
11、Rewinder (Separator Shaft & Pusher Device)：
| Parameter | Specification |
| Structure / Type | Welded steel frame, single-arm hydraulic expanding shaft, and gearbox structure |
| Quantity | 1 unit |
| Load Capacity | 5T |
| Coil Inner Diameter | Φ300mm; Φ400mm (with adapter plate) |
| Main Shaft Material | 42CrMo |
| Coil Drum Segment Plate | 45# steel, quenched and tempered, surface hard chrome plated |
| Clamping Jaw | Hydraulic cylinder-driven expansion |
| Coil Outer Diameter | MAX: Φ1600mm |
| Pusher Plate | Hydraulic cylinder-driven |
| Brake System | Disc brake |
| Main Motor Power | AC 55KW |
Structure and Function:
Rewinds slit strips. Composed of frame, drum, drive system, expansion system, brake system, lubrication system, and hydraulic system.
Drive System: Motor drives main shaft rotation.
Expansion System: Hydraulic cylinder provides tension, moving sliding block on shaft, which expands/contracts drum.
| Parameter | Specification |
| Structure / Type | Welded steel base and frame |
| Quantity | 1 unit |
| Separator Disc Size | Φ80×Φ180×3 |
| Spacer Sleeve Size | Φ80×Φ110×& |
Function:
Rewinds slit strips. Pressure arm swings via hydraulic cylinder. Pressure shaft can be manually pivoted to replace separation discs or pads easily.
12、Unloading Trolley
| Parameter | Specification |
| Structure / Type | Welded heavy-duty steel frame, hydraulic and motor control |
| Quantity | 1 unit |
| V-shaped Surface | Welded steel plate |
| Load Capacity | 5T |
| Lifting Stroke | 600mm |
| Trolley Driving Power | Motor |
| Trolley Traveling Speed | 7 m/min |
Structure and Function:
Used to unload coils from the rewinder. Travel is motor-driven, lifting by hydraulic cylinder. Equipped with anti-back insertion rod.
Lifting Mechanism: Hydraulic cylinder with sliding guide columns moves V-shaped coil platform up and down.
Travel Mechanism: Hydraulic motor drives trolley along rewinder shaft. Limit blocks prevent derailment.
13、Hydraulic System：
| Parameter | Specification |
| Quantity | 1 set |
| Oil Tank Capacity | 300 L |
| Pump Displacement | 25 ml/r |
| System Working Pressure | 12 MPa |
| Motor Power | 7.5 kW |
| Cooling Method | Air cooling |
| Operating Temperature | 0℃—60℃ |
| Working Medium | N68 anti-wear hydraulic oil |
Structure and Function:
Controls all hydraulic operations of the production line. Centralized system with one hydraulic station, multiple valve blocks, and pipelines. Components include oil tank, pump-motor unit, hydraulic valve blocks, and piping.
14、Pneumatic System
：
| Parameter | Specification |
| Air Source Pressure | 0.7 MPa |
| Air Flow | 1 m³/min (compressed air) |
| Air Supply | Provided by user |
Structure and Function:
Consists of air source (provided by user), air treatment units, solenoid valves, cylinders, and piping.
15、Electrical System
| Parameter | Specification |
| Power Supply Voltage | Three-phase 380 VAC ±10% |
| Frequency | 50 Hz ±1 |
Structure and Function:
Includes main console, decoiler sub-console, rewinder sub-console, and two electrical control cabinets. Centralized control with digital display, speed adjustment, manual feeding, continuous slitting, and fault alarm.
Control System: PLC from Taiwan Yonghong; other electrical components are imported or equivalent joint-venture products.
Operation: Touchscreen for easy setting and modification of process parameters, speed adjustment, switching between manual, single, and automatic modes, and monitoring equipment status to ensure safe and efficient production.
- Major Suppliers of Purchased Components：
1、Mechanical Components
| No. | Name | Manufacturer | Remark |
| 1 | Bearing | NSK, Japan | Slitting main machine |
| 2 | Bearing | Harbin Bearing / Wafangdian Bearing | Auxiliary equipment |
| 3 | Gear Reducer | Yingyi | — |
2、Pneumatic Components
| No. | Name | Manufacturer | Remark |
| 1 | Cylinder | High-quality domestic product | — |
| 2 | Solenoid Valve | Xingchen | — |
| 3 | Flow Control Valve | Xingchen | — |
3、Hydraulic Components
| No. | Name | Manufacturer | Remark |
| 1 | Solenoid Directional Valve | High-quality domestic product | — |
| 2 | Solenoid Relief Valve | High-quality domestic product | — |
| 3 | Cooler | High-quality domestic product | — |
- Electrical Components
| No. | Name | Supplier |
| 1 | PLC | Taiwan YH |
| 2 | Human-Machine Interface (HMI) | Taiwan WeRun |
| 3 | Inverter | Sine |
| 4 | Intermediate Relay | High-quality domestic brand |
| 5 | General-purpose Motor | Anhui Lu’an |
| 6 | Low-voltage Electrical Components | Schneider |
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