Overhead Travelling Crane

 

An overhead traveling crane, also known as a bridge crane, is a type of lifting equipment that is widely used in various industries for material handling. It is designed to move heavy loads horizontally across a workspace, typically in manufacturing plants, warehouses, and workshops.

2.An overhead traveling crane consists of parallel runways with a traveling bridge spanning the gap. The lifting mechanism, known as the hoist, is mounted on the bridge. This crane operates by moving the bridge along the runways, and the hoist moves along the bridge, providing a three-dimensional movement of loads within the crane's operational area.

3.When selecting an overhead traveling crane, consider factors such as the load capacity, span, lift height, speed, and the specific requirements of your operation. Proper installation and maintenance are crucial to ensure the crane's longevity and safe operation.

4.This introduction provides a basic understanding of overhead traveling cranes, highlighting their importance in various industrial applications.

Max. Lifting Height：20m

Warranty：1 Year

Weight (KG)：500 kg

Rated Lifting Moment：20-500kN

Max. Lifting Load：2.5-62.5t

Span：35m

Power：AC 220-690V 50Hz

working temperature：-33~46 degree

speed control：Resistance/Frequency conversion/Regulator

1.Main beam

1.The main beam, also known as the bridge girder or crane girder, is a crucial component of an overhead traveling crane. It plays a vital role in supporting the load and facilitating the movement of the hoist and trolley across the span of the crane.

2.Here's a detailed look at the main beam:Function:The main beam serves as the primary structural element that spans the distance between the crane's runways. It carries the weight of the load being lifted by the hoist and the weight of the hoist and trolley themselves. The beam is responsible for distributing these loads evenly across the runways, ensuring stable and safe operation.

Double Girder:

Design: Comprises two parallel beams with the trolley running on rails mounted on top of the girders. The hoist can be mounted either above or between the girders.

Applications: Designed for heavy loads, larger spans, and higher lifting heights. Commonly used in large industrial facilities, steel mills, and shipyards.

Advantages: Higher load capacity, greater stability, better hook height, and more flexibility in the positioning of the hoist.

3.In summary, the main beam of an overhead traveling crane is a foundational component that supports the crane's lifting operations, providing the necessary strength and stability to handle heavy loads safely and efficiently.

Lifting System

The lifting system of an overhead traveling crane is the mechanism that enables the crane to raise, lower, and move heavy loads. This system is central to the crane's operation and is designed to ensure the safe and efficient handling of materials.

The main components of the lifting system include the hoist, trolley, wire rope or chain, and various control mechanisms.Such as:

Hoist:

Function: The hoist is the core component responsible for lifting and lowering the load. It converts electrical energy into mechanical energy to move the load vertically.

Wire Rope or Chain:

Wire Rope: Made of strands of steel wire twisted together, wire ropes are strong, durable, and capable of handling heavy loads with minimal stretching.

Chain: Made of metal links, chains are typically used in lighter lifting operations. Chains offer high strength and are less prone to tangling or kinking than wire ropes.

3.The lifting system of an overhead traveling crane is used in various industries, including manufacturing, shipping, construction, and logistics, to handle loads ranging from small components to large, heavy machinery.

4.In summary, the lifting system of an overhead traveling crane is a complex yet vital component that enables the crane to perform its primary function of moving heavy loads. Its design, operation, and maintenance are critical to ensuring the safety and efficiency of the crane's operations.

3.End Beam

1.The end beam of an overhead traveling crane, also known as an end truck or end carriage, is a crucial component that supports the bridge girder (main beam) and allows the crane to travel along the runways.

2.Here's a detailed look at its functions, types, and design considerations:

Functions of the End Beam:

Support and Stability: The end beam supports the ends of the bridge girder and ensures it remains stable and aligned as it moves along the runways.

Movement: It houses the wheels or rollers that allow the entire crane bridge to travel horizontally along the runway beams.

Load Distribution: It helps distribute the load from the bridge girder to the runway beams, ensuring even weight distribution and stability during operation.

Types of End Beams:

Fixed End Beams:

Design: The end beam is rigidly attached to the bridge girder and does not have any moving parts for adjustment.

Applications: Suitable for applications where the crane's position on the runway is fixed or requires minimal adjustment.

Design Considerations:

Load Capacity:

The end beam must be designed to handle the maximum load capacity of the crane, including the weight of the bridge girder and the load being lifted.

Proper sizing and reinforcement are essential to ensure stability and safety.

Runway Compatibility:

The wheels or rollers must be compatible with the runway beams or rails to ensure smooth movement and prevent wear or damage.

Accurate alignment with the runway is crucial for proper operation.

3.In summary, the end beam of an overhead traveling crane is a key component that supports the crane bridge and facilitates horizontal movement along the runway. Its design and maintenance are crucial for the crane's overall performance, stability, and safety.

 

 

 

 

 

4.Crane travelling mechanism

1.The crane traveling mechanism of an overhead traveling crane is the system that allows the entire crane bridge (or main beam) to move horizontally along the runway beams. This mechanism is essential for positioning the crane within the operational area and facilitating the movement of loads across different parts of the workspace.

2.Components of the Crane Traveling Mechanism:

End Trucks (End Beams):

Function: End trucks, also known as end beams, are the structures mounted at either end of the crane bridge. They support the bridge and house the wheels or rollers that run on the runway beams.

Design: Typically include a frame, wheels or rollers, bearings, and sometimes a drive mechanism

Wheels/Rollers:

Function: Wheels or rollers mounted on the end trucks allow the crane bridge to move along the runway beams. They bear the weight of the crane and its load, facilitating smooth horizontal movement.

Drive Mechanism:

Function: Provides power for the crane's movement along the runway. This can be an electric motor connected to a gear system.

3.Applications:

Manufacturing: For moving materials and components along production lines.

Warehouses: To handle and reposition stored goods.

Construction: For moving heavy construction materials on-site.

Shipping and Receiving: To load and unload large shipments.

4.In summary, the crane traveling mechanism of an overhead traveling crane is designed to facilitate the horizontal movement of the crane bridge along the runway beams. This system involves end trucks, wheels or rollers, a drive mechanism, and a control system, all working together to enable precise and efficient material handling. Regular maintenance and proper operation are essential to ensure the reliability and safety of the crane's traveling mechanism.

5.Trolley travelling mechanism

The trolley traveling mechanism of an overhead traveling crane is responsible for moving the hoist horizontally across the crane's bridge girder (main beam). This mechanism enables the crane to position the load accurately within the operational area.

Components of the Trolley Traveling Mechanism:

Trolley Frame:

function: The frame is the structural component that houses and supports the hoist and other related mechanisms.

Trolley Wheels/Rollers:

Function: Wheels or rollers mounted on the trolley frame allow the trolley to move along the bridge girder. They ensure smooth movement and bear the weight of the hoist.

Types:

Rail Wheels: These wheels run on rails mounted on the bridge girder. They are typically used in top-running trolleys.

Rollers: In some designs, rollers may be used instead of wheels, especially in under-running trolleys.

Drive Mechanism:

Function: Provides power for the trolley's movement along the bridge girder. This can include an electric motor and gear system.

Types:

Direct Drive: The motor drives the trolley wheels directly.

Gear Drive: The motor drives a gear system that in turn drives the trolley wheels, allowing for precise control of movement.

Hoist:

Function: The hoist is mounted on the trolley and is responsible for lifting and lowering the load.

Types:

Electric Hoist: Powered by electricity, suitable for heavy-duty applications.

Manual Hoist: Operated by hand, typically used for lighter loads.

Pneumatic Hoist: Powered by compressed air, used in hazardous environments.

In summary, the trolley traveling mechanism of an overhead traveling crane is responsible for the horizontal movement of the hoist along the crane's bridge girder. It includes the trolley frame, wheels or rollers, drive mechanism, and control system. Proper maintenance and operation are essential to ensure smooth and safe crane operation.

6.Crane wheel

1.The crane wheels of an overhead traveling crane are crucial components that allow the crane bridge to move horizontally along the runway beams. They play a key role in the crane's operation by bearing the weight of the crane and its load while ensuring smooth and stable movement.

2.Functions of Crane Wheels:

Support: Crane wheels support the weight of the crane bridge, hoist, and load, transferring this weight to the runway beams.

Movement: They enable the horizontal movement of the crane along the runway beams or rails.

Stability: Properly designed and maintained wheels ensure stable and smooth operation, minimizing vibration and wear.

3.Types of Crane Wheels:

Flanged Wheels:

Design: Have a flange on one or both sides of the wheel to keep it aligned with the runway rail.

Applications: Commonly used for top-running cranes, where the wheels run on the top flange of the runway beam.

Grooved Wheels:

Design: Have a groove that matches the profile of the runway rail, allowing for smooth and stable operation.

Applications: Used in cranes where the wheels must fit precisely into the rail profile.

V-Groove Wheels:

Design: Feature a V-shaped groove that aligns with the V-shaped rail profile.

4.Design Considerations:

Load Capacity:

The wheels must be designed to support the maximum load of the crane, including the weight of the crane bridge, hoist, and the load being lifted.

Material Strength:

Wheels are typically made from high-strength materials such as forged steel or cast iron to ensure durability and resistance to wear.

Alignment:

Proper alignment of the wheels with the runway beams or rails is crucial for smooth operation and to prevent excessive wear or damage.

5.In summary, the crane wheels of an overhead traveling crane are essential for enabling the horizontal movement of the crane along the runway beams. Their design, material, and maintenance are critical for ensuring smooth, stable, and safe crane operations.

7.Crane hook

1.The crane hook of an overhead traveling crane is a critical component used to lift, hold, and transport loads. It is the point of connection between the crane's lifting system (hoist) and the load being handled.

2.Functions of the Crane Hook:

Lifting: The primary function of the crane hook is to lift and hold the load securely during handling.

Securing: The hook must securely attach to the load, ensuring that it does not slip or fall during movement.

Positioning: The hook allows for precise positioning of the load within the crane's operational area.

3.Types of Crane Hooks:

Single Hook:

Design: A single, simple hook with a single point of attachment. It is the most common type of hook used in cranes.

Applications: Suitable for a wide range of lifting tasks, from light to medium loads.

Double Hook:

Design: Features two hooks mounted on a common shackle or pin, allowing for lifting loads from two points.

Applications: Useful for handling loads that require balance or stability, such as long beams or awkwardly shaped items.

Grab Hook:

Design: Equipped with additional gripping features or teeth to secure the load more firmly.

Applications: Often used in lifting applications where extra grip is needed, such as with loose or irregularly shaped materials.

4.Applications:

Manufacturing: For lifting and moving components and finished products along production lines.

Warehouses: To handle and reposition stored goods and materials.

Construction Sites: For lifting heavy construction materials and equipment.

Shipping and Receiving: To load and unload goods and materials.

5.In summary, the crane hook of an overhead traveling crane is a vital component that provides the connection between the crane's lifting system and the load. Its design, type, and maintenance are critical to ensuring safe and efficient lifting operations.

 

8.Motor

1.The motor of an overhead traveling crane is a key component that provides the necessary power for the crane's various operations, including lifting, lowering, and horizontal movement. The motor converts electrical energy into mechanical energy, driving the hoist and trolley systems.

2.Functions of the Crane Motor:

Power Transmission: Converts electrical energy into mechanical power to drive the hoist for lifting and lowering loads, and the trolley and bridge for horizontal movement.

Speed Control: Allows for the control of the crane's operating speed, enabling precise handling of loads.

Directional Control: Provides the capability to change the direction of movement, both vertically (for the hoist) and horizontally (for the trolley and bridge).

3.Types of Motors:

AC Motors:

Design: Alternating current (AC) motors are commonly used in overhead traveling cranes. They are reliable and offer good performance for continuous operation.

Applications: Used for both hoisting and trolley travel systems. They can be standard squirrel-cage motors or more advanced designs like synchronous or induction motors.

DC Motors:

Design: Direct current (DC) motors are used for applications requiring precise speed and torque control. They are less common in modern cranes due to the advent of advanced AC drives.

Applications: Typically used in older crane systems or specific applications requiring fine control of speed and positioning.

4.Applications:

Manufacturing: Used in industrial settings to move materials along production lines and between workstations.

Warehouses: For handling and positioning goods within storage areas.

Construction Sites: To move heavy materials and equipment on-site.

Shipping and Receiving: To aid in the loading and unloading of goods.

5.In summary, the motor of an overhead traveling crane is essential for driving the crane's lifting and movement systems. It must be carefully selected and maintained to ensure reliable and efficient operation, considering factors such as load capacity, speed, torque, and environmental conditions.

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9.Sound and light alarm system & limit switch

The sound and light alarm system, along with the limit switches of an overhead traveling crane, are crucial safety features designed to enhance the operational safety and prevent accidents.

Sound and Light Alarm System

Purpose:

To provide audible and visual warnings to operators and personnel about the crane's status or any potential hazards.

To alert the operator of conditions that could pose a risk to safety, such as overloading or approaching the limits of the crane's movement.

Components:

Sound Alarms:

Function: Emit loud noises to alert operators and nearby personnel of potential hazards or operational issues.

Types:

Horn: Commonly used for general warning signals, such as the start or stop of crane operations.

Siren: Provides a more urgent warning for critical conditions, such as overload or emergency situations.

Light Alarms:

Function: Use flashing or steady lights to visually signal the crane's status or warnings.

Types:

Flashing Beacon: Often used to indicate that the crane is in operation or that a warning condition exists.

Steady Light: Used for continuous warnings, such as when the crane is in a hazardous or restricted area.

Design Considerations:

Visibility and Audibility:

The sound and light alarms should be clearly visible and audible over ambient noise and environmental conditions in the operating area.

Placement of alarms should be strategic to ensure they are noticed by the operator and personnel.

Integration:

Alarms should be integrated with the crane's control system to activate automatically in response to specific conditions, such as overloading or reaching travel limits.

Durability:

Alarms must be designed to withstand the operational environment, including exposure to dust, moisture, and temperature extremes.

Maintenance:

Regular checks and maintenance are required to ensure that alarms are functioning correctly and replace any malfunctioning components.

Limit Switches

Purpose:

To prevent the crane from exceeding its designed operating limits and to protect both the crane and its surroundings from damage.

To provide automatic control by stopping or adjusting the crane's movement when certain conditions are met.

Types of Limit Switches:

Hoist Limit Switches:

Function: Prevent the hoist from lifting or lowering the load beyond its maximum or minimum limits.

Design: Usually installed at the top and bottom of the hoist travel path to stop the hoist motor when these limits are reached.

Travel Limit Switches:

Function: Control the horizontal movement of the crane bridge and trolley, ensuring that the crane does not move beyond the ends of the runway or travel rails.

Design: Typically located at the ends of the runway or rail, and activated by the crane's movement to stop or reverse motion.

Safety Limit Switches:

Function: Provide additional safety by stopping the crane or specific functions in case of abnormal conditions or system failures.

Design: May be installed in various locations based on safety requirements and operational needs.

Design Considerations:

Accuracy:

Limit switches must be accurately calibrated to ensure they activate at the correct positions and prevent overtravel or unintended movements.

Reliability:

Switches should be reliable and robust to function correctly under the crane's operational conditions, including vibration and environmental factors.

Adjustability:

Many limit switches are adjustable to accommodate different crane configurations and operating requirements.

Integration:

Limit switches should be integrated with the crane's control system to provide automatic stopping or adjustments and to trigger alarm systems if necessary.

Maintenance:

Regular inspection and maintenance are essential to ensure that limit switches are functioning properly and to address any wear or malfunction.

Applications:

Manufacturing and Warehousing: To ensure safe operation of cranes during material handling and storage.

Construction Sites: To prevent cranes from exceeding operational limits and ensure safe lifting and positioning of construction materials.

Shipping and Receiving: To manage the safe movement of goods and equipment during loading and unloading operations.

3.In summary, the sound and light alarm system and limit switches are critical safety features in an overhead traveling crane. They work together to ensure safe operation by providing warnings and automatically controlling the crane's movement to prevent accidents and equipment damage. Regular maintenance and proper integration with the crane's control systems are essential for their effective operation.

10.Safety Devices

1. Overload Protection

Purpose: To prevent the crane from lifting loads that exceed its rated capacity, which could cause structural damage or failure.

Components:

Overload Sensor: Measures the load weight and sends signals to the crane's control system.

Safety Device: Automatically stops the crane from lifting or lowers the load if the weight exceeds the set limit.

Design Considerations:

Calibration to ensure accurate load measurement.

Regular testing to verify functionality.

2. Limit Switches

Purpose: To prevent the crane from moving beyond its designed operational limits, protecting both the crane and its surroundings.

Types:

Hoist Limit Switches: Stop the hoist when it reaches its maximum or minimum travel limits.

Travel Limit Switches: Control the horizontal movement of the crane bridge and trolley, preventing overtravel.

Design Considerations:

Accurate calibration for proper activation.

Robust construction to withstand operational conditions.

3. Emergency Stop Button

Purpose: Provides a quick way to stop all crane operations in case of an emergency.

Components:

Button: Typically red and located in easily accessible areas.

Control System Integration: Stops the crane's movements and activates alarms.

Design Considerations:

Easily reachable and clearly marked.

Regular testing to ensure functionality.

4. Safety Latches

Purpose: To prevent the load from accidentally slipping off the crane hook.

Components:

Latch Mechanism: Attached to the hook to cover the opening and secure the load.

Types:

Manual Latch: Requires manual operation to open or close.

Automatic Latch: Automatically engages or disengages based on load movement.

Design Considerations:

Reliable operation under load.

Regular inspection to ensure proper functioning.

5. Sound and Light Alarms

Purpose: To alert operators and nearby personnel of potential hazards or operational status.

Components:

Sound Alarms: Horns or sirens that emit loud noises for warning signals.

Light Alarms: Flashing or steady lights to visually indicate warning conditions.

Design Considerations:

Visibility and audibility in the operating environment.

Integration with the crane's control system for automatic activation.

11.Control Mode

1. Pendant Control

Description:

Pendant control involves a hand-held device with a cable that connects to the crane's control system. The operator uses this device to control the crane's movements.

Components:

Pendant Station: A control box with buttons or joysticks for operating the crane.

Cabling: Connects the pendant to the crane's control system.

Advantages:

Operator Mobility: Allows the operator to be positioned at a safe distance from the crane's load.

Direct Control: Provides immediate feedback and control over crane movements.

Disadvantages:

Limited Range: The operator is constrained by the length of the cable.

Potential for Cable Damage: Cables can wear out or become damaged over time.

2. Radio Remote Control

Description:

Radio remote control uses wireless technology to operate the crane from a distance, allowing the operator to move freely around the crane's operational area.

Components:

Radio Transmitter: Handheld device with controls for operating the crane.

Radio Receiver: Mounted on the crane to receive signals from the transmitter.

Advantages:

Operator Freedom: Enables the operator to be positioned anywhere within the crane's operational area.

Enhanced Safety: Allows the operator to stay clear of potential hazards.

Disadvantages:

Signal Interference: Can be affected by interference or signal loss.

Battery Life: Requires regular charging or replacement of batteries.

3. Cabin Control

Description:

Cabin control involves an enclosed operator's cabin mounted on the crane bridge. The operator sits inside the cabin to control the crane's movements.

Components:

Operator Cabin: Equipped with controls, instruments, and a visibility window.

Control Panel: Includes joysticks, buttons, and other controls for operating the crane.

Advantages:

Comprehensive Control: Provides access to all crane controls in one location.

Weather Protection: The cabin protects the operator from weather conditions.

Disadvantages:

Limited Mobility: The operator is confined to the cabin.

Higher Costs: Cabin installation and maintenance can be more expensive.

4. Automatic or Semi-Automatic Control

Description:

Automatic or semi-automatic control systems automate certain crane functions, either partially or fully, based on pre-set programs or sensors.

Components:

Programmable Logic Controller (PLC): Manages automated functions and sequences.

Sensors and Cameras: Provide data for automated operations and adjustments.

Advantages:

Increased Precision: Automates repetitive tasks and improves accuracy.

Reduced Operator Fatigue: Minimizes the need for constant manual control.

Disadvantages:

Complexity: Requires advanced programming and maintenance.

Potential for System Errors: Automated systems can fail or require recalibration.

 

12.Sketch

 

 

 

1. High Lifting Capacity

Description: Overhead traveling cranes are capable of lifting heavy loads, often exceeding the capacity of other types of cranes.

Benefit: Suitable for handling large, heavy, and bulky items that are common in manufacturing, construction, and warehousing.

2. Efficient Use of Space

Description: These cranes operate along the top of the building's structure or rail system, freeing up floor space.

Benefit: Maximizes available workspace and storage areas, allowing for more efficient use of the facility.

3. Versatile Movement

Description: Overhead traveling cranes can move both horizontally (along the runway) and vertically (along the hoist).

Benefit: Provides flexibility in load positioning and handling, making it easier to maneuver loads within a large area.

4. Improved Safety

Description: Features such as limit switches, overload protection, and safety alarms enhance operational safety.

Benefit: Reduces the risk of accidents, equipment damage, and operator injury, contributing to a safer work environment.

5. Precision and Control

Description: Advanced control systems, including pendant, radio remote, and automatic controls, offer precise handling of loads.

Benefit: Enables accurate positioning and movement of loads, which is critical for tasks requiring high precision.

6. Durability and Reliability

Description: Designed for heavy-duty operation, overhead traveling cranes are built with robust materials and components.

Benefit: Offers long-term reliability and minimal downtime, reducing maintenance costs and enhancing productivity.

 

 

1. Manufacturing

Assembly Lines: Used to move heavy parts and components along assembly lines, aiding in the production and assembly of machinery and products.

Machine Shops: Facilitates the movement of heavy machinery, parts, and raw materials within a machine shop environment.

2. Warehousing and Distribution

Storage Handling: Moves goods and materials within warehouses, including stacking and retrieving items from high shelves.

Order Fulfillment: Assists in picking and placing items for shipping and receiving, improving the efficiency of order processing.

3. Construction

Material Handling: Used to lift and transport building materials, such as steel beams, concrete panels, and construction equipment, on construction sites.

Erection of Structures: Helps in the assembly and erection of large structures and components, including bridges and buildings.

4. Steel Mills and Foundries

Steel Handling: Moves heavy steel billets, ingots, and coils throughout the mill, from the furnace to the rolling mill.

Casting Operations: Assists in handling and transporting molten metal and castings during the manufacturing process.

5. Shipyards

Shipbuilding: Used to lift and position large ship components, such as hull sections and engines, during the construction and repair of ships.

Loading and Unloading: Facilitates the loading and unloading of heavy cargo and equipment from ships.

6. Automotive Industry

Vehicle Assembly: Moves parts and components during the assembly of vehicles, including engines, chassis, and body panels.

Maintenance and Repair: Assists in the maintenance and repair of automotive assembly lines and machinery.

 

 

Material Inspection

Quality Inspection: Strict quality inspection is carried out on the purchased raw materials to ensure that they meet the design requirements and national standards.

Material Storage: Qualified materials are stored according to classification to prevent corrosion or damage.

Cutting and Forming

Steel Cutting: Use plasma cutting, laser cutting or flame cutting and other technologies to cut the steel according to the size of the design drawing.

Forming Processing: Form the steel plate through bending, rolling, welding and other processes to manufacture the main beam, end beam and other structural parts.

Welding

Component Welding: The cut and formed steel parts are welded into the main structures such as the main beam, end beam and trolley. The welding process needs to be strictly controlled to ensure the structural strength and welding quality.

Weld Inspection: Use non-destructive testing technology (such as ultrasonic testing, radiographic testing) to inspect the welds to ensure that there are no cracks or other defects.

Machining

Precision Machining: Precision machining is performed on the key components of the crane, such as wheel sets, bearing seats, pulleys, etc., to ensure their dimensional accuracy and surface quality.

Assembly of the whole machine

General assembly: On the basis of pre-assembly, the overall assembly of the crane is carried out, including the final installation of the main beam, end beam, lifting mechanism, walking mechanism, etc.

Commissioning and testing

Under dynamic conditions, the operating performance of the crane is tested, including the testing of lifting, walking, steering and other functions. The overall size of the assembled bridge crane is checked to ensure that all dimensions meet the design requirements.

Spraying and anti-corrosion treatment

Surface treatment Rust removal: Rust removal on the surface of the crane, common methods include sandblasting, pickling, etc. Primer spraying: Spray anti-corrosion primer on the treated surface to prevent metal oxidation and corrosion. Topcoat spraying Color spraying: Spray topcoat according to customer requirements or industry standards to give the crane a protective and decorative effect. Marking: After spraying, mark the crane's identification information in accordance with the specifications, such as model, rated load, etc.

Factory and installation

Packaging and transportation

Packaging protection: Protectively package the key components of the crane to prevent damage during transportation. Transportation arrangement: According to the equipment size and transportation conditions, select a suitable transportation method to transport the crane to the customer's site.

Acceptance and delivery

Customer acceptance

On-site acceptance: The customer conducts on-site acceptance of the crane according to the contract requirements and technical specifications to check the performance and quality of the equipment.

Problem rectification: If any problems are found, the manufacturer needs to rectify them in time to ensure that the equipment fully meets the customer's requirements. Delivery and use Operation training: The manufacturer usually trains the customer's operators to ensure that they can operate the crane correctly and safely.

 

 

 

Material Inspection

Quality Inspection: Strict quality inspection is carried out on the purchased raw materials to ensure that they meet the design requirements and national standards.

Material Storage: Qualified materials are stored according to classification to prevent corrosion or damage.

Cutting and Forming

Steel Cutting: Use plasma cutting, laser cutting or flame cutting and other technologies to cut the steel according to the size of the design drawing.

Forming Processing: Form the steel plate through bending, rolling, welding and other processes to manufacture the main beam, end beam and other structural parts.

Welding

Component Welding: The cut and formed steel parts are welded into the main structures such as the main beam, end beam and trolley. The welding process needs to be strictly controlled to ensure the structural strength and welding quality.

Weld Inspection: Use non-destructive testing technology (such as ultrasonic testing, radiographic testing) to inspect the welds to ensure that there are no cracks or other defects.

Machining

Precision Machining: Precision machining is performed on the key components of the crane, such as wheel sets, bearing seats, pulleys, etc., to ensure their dimensional accuracy and surface quality.

Assembly of the whole machine

General assembly: On the basis of pre-assembly, the overall assembly of the crane is carried out, including the final installation of the main beam, end beam, lifting mechanism, walking mechanism, etc.

Commissioning and testing

Under dynamic conditions, the operating performance of the crane is tested, including the testing of lifting, walking, steering and other functions. The overall size of the assembled bridge crane is checked to ensure that all dimensions meet the design requirements.

Spraying and anti-corrosion treatment

Surface treatment Rust removal: Rust removal on the surface of the crane, common methods include sandblasting, pickling, etc. Primer spraying: Spray anti-corrosion primer on the treated surface to prevent metal oxidation and corrosion. Topcoat spraying Color spraying: Spray topcoat according to customer requirements or industry standards to give the crane a protective and decorative effect. Marking: After spraying, mark the crane's identification information in accordance with the specifications, such as model, rated load, etc.

Factory and installation

Packaging and transportation

Packaging protection: Protectively package the key components of the crane to prevent damage during transportation. Transportation arrangement: According to the equipment size and transportation conditions, select a suitable transportation method to transport the crane to the customer's site.

Acceptance and delivery

Customer acceptance

On-site acceptance: The customer conducts on-site acceptance of the crane according to the contract requirements and technical specifications to check the performance and quality of the equipment.

Problem rectification: If any problems are found, the manufacturer needs to rectify them in time to ensure that the equipment fully meets the customer's requirements. Delivery and use Operation training: The manufacturer usually trains the customer's operators to ensure that they can operate the crane correctly and safely.

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