Steel Coil Overhead Crane

 

Single Girder vs. Double Girder

Feature	Single Girder	Double Girder
Capacity	Up to 20 tons	20–100+ tons
Span	Short to medium	Long spans
Cost	Lower	Higher
Best For	Small workshops	Heavy-duty mills

 

Specialized Coil Handling Cranes

C-Hook Overhead Cranes

Uses a C-shaped lifting hook to cradle coils.

Ideal for vertical coil handling.

Electromagnetic Overhead Cranes

Uses electromagnets for quick lifting without hooks.

Best for flat-lying coils.

Coil Grabbing Cranes

Equipped with mechanical grabs for secure clamping.

Used for horizontal coil transport.

Rotating Coil Cranes

Features a rotating trolley for precise coil positioning.

Used in processing lines (e.g., uncoiling machines).

 

Key Features of Steel Coil Overhead Cranes

(A) Load Handling Attachments

C-Hooks – Most common, prevents coil deformation.

Coil Grippers/Clamps – For horizontal lifting.

Electromagnets – Fast handling but requires power.

Vacuum Lifters – For delicate or polished coils.

(B) Structural Reinforcements

Heavy-duty girder design (box girder for double girder cranes).

Anti-sway technology for precise coil placement.

Impact-resistant bumpers to prevent coil damage.

(C) Safety & Control Systems

Overload protection – Prevents lifting beyond capacity.

Variable speed control – Smooth acceleration/deceleration.

Remote/pendant control – Operator flexibility.

 

 

Steel coil handling cranes require specialized components to safely lift, transport, and position heavy coils. Below is a detailed breakdown of all critical parts:

 

1. Bridge Structure

(A) Main Girder (Single or Double Girder)

Single Girder: Cost-effective for lighter coils (up to 20 tons).

Double Girder: Heavy-duty (20–100+ tons), better for long spans.

Material: Reinforced steel (box girder for high capacity).

(B) End Trucks (End Carriages)

Function: Supports the bridge and allows movement along the runway.

Components:

Wheels (flanged for runway tracking).

Drive motors (for powered movement).

Buffers/Bumpers (shock absorption).

2. Hoist & Lifting Mechanism

(A) Hoist Unit

Electric Chain Hoist: For lighter coils (1–10 tons).

Wire Rope Hoist: For heavy-duty lifting (10–100+ tons).

Geared Motor: Provides lifting power.

(B) Trolley Assembly

Function: Moves the hoist along the girder.

Types:

Manual Push Trolley (low-cost, light use).

Motorized Trolley (automated, precise positioning).

(C) Coil-Specific Lifting Attachments

Attachment	Best For	Pros	Cons
C-Hook	Vertical coils	Prevents deformation	Requires manual adjustment
Coil Grab/Clamp	Horizontal coils	Secure grip	Needs precise alignment
Electromagnet	Flat-lying coils	Fast handling	Power-dependent
Vacuum Lifter	Polished/coated coils	No scratches	Limited capacity

3. Runway System

(A) Runway Beams

Top-running: Supported by columns (higher capacity).

Underhung (Suspension): Mounted to ceiling (space-saving).

(B) Rails/Tracks

Standard I-beams (for top-running).

Enclosed tracks (for underhung cranes).

(C) Crane Buffers & End Stops

Prevent collisions at runway ends.

 

4. Power & Control System

(A) Power Supply

Festoon System (cable management for moving cranes).

Conductor Bars (for high-duty cycles).

(B) Control Options

Pendant Control (wired, handheld).

Radio Remote Control (wireless, flexible operation).

Automated (PLC-controlled) for integrated production lines.

(C) Safety Features

Overload limiter (blocks excess lifting).

Limit switches (prevents over-travel).

Emergency stop (instant shutdown).

.

5. Optional Add-Ons

✔ Anti-Sway System – Reduces load swing.
✔ Weighing Scale – Measures coil weight in real-time.
✔ Rotating Trolley – For precise coil alignment.
✔ Crane Camera – Improves visibility for operators.

Comparison: Standard vs. Coil-Specific Cranes

Component	Standard Overhead Crane	Steel Coil Crane
Girder Design	Lighter construction	Reinforced for heavy, uneven loads
Lifting Device	Standard hook	C-hook, magnet, or grab
Control System	Basic speed control	Anti-sway, precision positioning
Runway	Standard beams	Heavy-duty runway for coil impact

SKETCH

Main technical

 

 

Advantages of Steel Coil Overhead Cranes

Specialized Handling

Designed specifically for steel coils with attachments (C-hooks, magnets, grabs) that prevent deformation and ensure secure lifting

High Efficiency

Faster loading/unloading compared to forklifts (up to 50% productivity increase)

Can handle multiple coils simultaneously with proper attachments

Space Optimization

Vertical lifting maximizes floor space utilization

No ground obstructions like with forklifts

Safety Features

Anti-sway systems for precise positioning

Overload protection prevents accidents

Reduces worker injuries from manual handling

Durability

Reinforced structures withstand heavy, dense loads

Corrosion-resistant options available for harsh environments

Versatility

Can be equipped with different attachments for various coil types/sizes

Adaptable to both indoor and outdoor applications

 

 

Steel Mills & Processing Plants

Moving hot-rolled and cold-rolled coils

Feeding processing lines (pickling, galvanizing, etc.)

Warehousing & Storage

Stacking coils up to 5 layers high

Loading/unloading from trucks and railcars

Ports & Terminals

Transferring coils between ships, trucks and storage yards

Container loading/unloading operations

Metal Fabrication

Feeding stamping presses and slitting lines

Handling coils in service centers

Automotive Industry

Supplying coil stock to production lines

Handling specialty steel for auto parts

Industry-Specific Benefits

For Steel Service Centers: Enables processing 50+ coils per shift

For Cold Rolling Mills: Handles coils up to 200°C safely

For Export Facilities: Speeds up loading of vessels (100+ coils/hour)

 

 

1.Design and Engineering
Requirements Gathering:

Load capacity (e.g., 10T, 50T, 100T, etc.), span, lifting height, and operational environment are defined.

Customization needs are assessed, such as control modes (pendant, wireless, cabin) and special features (e.g., anti-collision, overload protection).

Preliminary Design:

Structural engineers and crane designers create the crane's initial design, including the main beam, end carriage, lifting system, trolley system, travel mechanism, and other components.

Calculation and Simulation:

Load calculations are performed to ensure the crane can handle the specified capacity.

Finite element analysis (FEA) may be used to simulate stresses and deflections in the structure to ensure safety and stability.

Detailed Design:

After approval, detailed drawings for each part are made, including the main girder, end carriage, hoist system, motors, control systems, and safety features.

2. Material Procurement
Raw Material Selection:

High-quality materials like steel, alloyed steel, forged steel, and electrical components are sourced according to specifications.

Materials are inspected for quality certification and compliance with industry standards (e.g., ISO, CE).

Component Sourcing:

Standard components such as motors, hoists, control panels, limit switches, and safety devices are sourced from reliable suppliers.

3. Fabrication of Components
Main Girder:

Cutting and welding of steel plates to form the bridge girder.

The girder is assembled by welding or bolting sections, ensuring it meets the required strength and precision.

End Carriage Assembly:

The end carriage is fabricated and assembled to hold the crane on the runway rails.

Wheel assemblies are installed to ensure smooth travel along the rails.

Hoist and Trolley System:

The hoist unit (electric or manual) is assembled, including the drum, wire rope, hook, and motor.

The trolley system is built to transport the hoist across the bridge, including trolley wheels and drive mechanisms.

Crane Traveling Mechanism:

The crane wheels are mounted on the end carriages, ensuring smooth horizontal movement.

The drive system is installed to control travel speed.

4. Assembly of Crane
Main Beam Installation:

The assembled main girder is lifted and positioned onto the end carriages.

The girder is aligned to ensure structural integrity.

Trolley and Hoist Installation:

The trolley system is mounted onto the main girder, and the hoist is mounted to the trolley.

The load chain or wire rope is installed and tested for smooth operation.

Travel Mechanism Setup:

The crane wheels are fitted, and the drive mechanism is connected to the control system for horizontal movement.

5. Electrical and Control System Installation
Wiring and Control Panel:

The control panel is installed and wired to manage all crane movements (hoisting, trolley, crane travel).

Limit switches, emergency stop buttons, and safety alarms are integrated into the control system.

Motor and Gear Installation:

Motors for hoisting, traveling, and the trolley are installed and connected to their respective gear systems.

Testing of Control Systems:

Control systems are checked to ensure proper integration of pendant control, wireless remote, or cabin control options.

6. Testing and Quality Control
Load Testing:

The crane undergoes static load testing (to check stability) and dynamic load testing (to check operational performance under actual working conditions).

Overload protection and limit switches are tested to ensure they function correctly.

Safety System Testing:

The sound and light alarms, limit switches, emergency stop buttons, and safety devices are all tested for functionality.

Movement Testing:

All movements-hoisting, trolley movement, bridge travel, and sway control-are tested for smooth operation and precision.

Electrical Testing:

All electrical components are tested for proper wiring, grounding, and communication between systems.

Documentation and Certification:

The crane is inspected according to international safety standards and undergoes certification by relevant authorities (e.g., CE, ISO).

Test certificates for motors, cranes, and load testing are prepared.

7. Final Inspection and Painting
Visual Inspection:

A thorough inspection is carried out to ensure that the crane meets design specifications and safety requirements.

Painting:

The crane is painted with high-quality anti-corrosion coatings to protect it from environmental conditions.

Marking and Labeling:

Safety labels, warnings, and capacity markings are applied to the crane for proper identification.

8. Delivery and Installation
Shipping:

The crane is carefully disassembled into transportable parts (if needed) and shipped to the customer's location.

Installation:

The crane is installed on-site, and all connections (power, mechanical, control) are made.

Final Commissioning:

The crane is commissioned by running it through a series of operational tests to ensure it works properly.

Operator training is conducted, if necessary, for safe and efficient use.

9. Post-Installation Support
Customer Training:

Operator training on how to use the crane safely and effectively.

Maintenance Schedule:

Providing a maintenance plan for the crane's continued operation, including regular inspections, lubrication, and testing.

After-Sales Support:

Offering spare parts, troubleshooting, and repair services.

Workshop view:

The company has installed an intelligent equipment management platform, and has installed 310 sets (sets) of handling and welding robots. After the completion of the plan, there will be more than 500 sets (sets), and the equipment networking rate will reach 95%. 32 welding lines have been put into use, 50 are planned to be installed, and the automation rate of the entire product line has reached 85%.