Advantages of Steel Plate Welding Drum

 

The steel plate welding drum is a component used to wind the wire rope. During the lifting process, the wire rope is retracted and released by the drum, driving the pulley block and the object-taking device to achieve the lifting and lowering of the load. The drum group is mainly composed of the drum, drum shaft, gear plate handle (or large gear), drum hub, bearing body and bearing. As an important load-bearing component of the lifting mechanism, the drum’s stable and reliable performance is an important guarantee for the normal operation of the crane.

 

Technical requirements for steel plate welding drums

 

“Based on the technical requirements for steel plate welding drums with a diameter of 850”

 

1. The drum is made of Q345B steel plate cold rolled and welded;

2. The horizontal and vertical joints of the drum body should be butt-jointed with grooves according to the requirements of the drawings. If the segmented manufacturing and ring welding are used for butt joint, the longitudinal welds should be staggered by >90°. All butt welds are subjected to 100% UT flaw detection inspection, and the weld quality is inspected and accepted according to AWS standards. The welding rod material is E5015;

3. The drum body and end plate are subjected to UT and MT inspections respectively according to the requirements of the drawings. The welds between the end plate and the shaft are subjected to 100% MT flaw detection inspection, and no cracks in any direction are allowed;

4. Stress treatment is performed on the drum after welding;

5. After machining, install the pressure plate and bolts for static balance, unbalance grade G6.3, allowable eccentricity e=0.8mm, allowable unbalance mass on the drum wall, M=1.6G/Dokg (G drum weight, Do-diameter of the balance weight), balance weight is symmetrically attached along the length of the drum, material is Q235, fillet weld;

6. Remove sharp edges and corners;

7. The drum surface rope groove is quenched HB300~380;

8. The drum short shaft is 35 steel, normalized and tempered, and chemical composition, hardness (HB=149~187), and ultrasonic flaw detection are carried out before welding. It can be installed and welded only after meeting the factory standard requirements;

9. The drum is rounded after stress relief welding, and the cylindricality is less than or equal to 3mm;

10. Except for the shaft extension, the inside and outside of the drum are painted according to the company standard.

 

Advantages of steel plate welding drum

 

Steel plate welding drums are generally made of Q235B and Q345B steel plates, which are rolled and welded into drums. This type of steel plate welding drum has better performance:

 

1. The steel plate welding drumhas higher hardness, better wear resistance and strong impact resistance, so the service life will be longer in general.

 

2. The surface of this drum has a guide spiral groove, which is conducive to single-layer winding of the wire rope. In general, standard grooves are used, and deep grooves are used only when the wire rope is in danger of slipping out of the groove (such as grab drums). The cross-sectional dimensions of the spiral groove, the relationship between the wire rope diameter and the pitch can be selected according to the drum structure with gear disc takeover.

 

3. The steel plate welding drumhas the advantages of light weight, less cutting, high strength, better wear resistance, strong impact resistance, environmental protection and energy saving in processing engineering, and has become the mainstream process in developed countries.

 

4. When the diameter of the steel plate welding drum is large, it is rolled, welded, formed, de-reinforced, inspected, and shipped when the steel plate is heated. Sometimes, the wall thickness is particularly thick and needs secondary heating. The advantages are small outer diameter tolerance, uniform wall thickness, etc., and the main thing is that it will not damage the performance of the raw materials.

 

5. The development and application of steel plate welding drums are of great significance, especially for large-diameter drums. The use of large-diameter steel pipe drums increases the diameter ratio of the drum and the wire rope, and extends the service life of the wire rope. The large-diameter drum has a small length, which reduces the introduction angle of the wire rope and reduces the wear of the wire rope in and out of the rope groove.

 

6. At the same lifting height, the drum length is shortened, so that the hook is closer to the leg columns at both ends of the workshop, which increases the working space, reduces the working blind area, and makes full use of the workshop space. The short drum length reduces the horizontal displacement of the load when the hook is lifted, realizes the vertical lifting of the load, the load is small, and the positioning is accurate.

 

Steel plate welding drums are widely used in many industries due to their high strength, durability and customizability, such as:

 

Lifting equipment

 

Lifting equipment: The drum part of equipment such as tower cranes, gantry cranes, and cranes is responsible for winding and carrying lifting loads.

Winches: steel plate welding drums can be used for rope winding devices in winches, suitable for use in lifting and lifting operations, especially in ports, ships, mines, etc.

 

Steel industry

 

Steel coil device: steel plate welding drums are often used in steel mills’ steel coil equipment as a load-bearing and conveying device for steel coils.

Metal processing: In the process of steel processing and smelting, steel plate drums are used to wind heavy metal wires, strip steel, etc.

 

Ship and marine engineering

 

Anchor windlass: Anchor windlass on ships often use steel plate welding drums for the operation of retracting and releasing anchor chains and anchor cables.

Deep-sea operations: In offshore drilling and submarine engineering, steel plate drums can be used for operations such as laying out wires and pulling cables, especially in marine engineering equipment.

 

Mining and construction industry

 

Mine hoist: In the mine hoisting system, steel plate welding drums are used for hoisting ore or transporting personnel, and can withstand high loads and high frequency working environments.

Construction equipment: Steel plate drums are widely used in large construction equipment (such as tower cranes and elevators) for lifting and transporting materials.

 

In these scenarios, steel plate welding drums are widely used in equipment that needs to withstand high loads and frequent use due to their strong load-bearing capacity, high durability and strong adaptability.