China Good quality Large Cast Steel Rope Sheave with Groove Hardening with high quality

Product Description

Product Parameters

Material:VLC620AW

Material C Si Mn P S Cr Mo Ni Cu V
As Required ≤0.25 ≤0.60 0.50-1.70 ≤0.030 ≤0.030 ≥0.40 ≥0.15 ≥0.40 ≤0.30 ≤0.12
Actual 0.21 0.47 0.91 0.018 0.012 0.63 0.21 0.73 0.05 0.006

 

Mechanical Property Tensile Test Impact Test
As Rquired Yield Tensile Strength Elongation Recution of Area Akv,-20° ≥42J
≥430 ≥620 ≥16 ≥30 1 2 3 Average
Actual 600 740 20 51 79 57 72 69

  
It is up to customers’ requirement.
 

Item Standard
Casting Material EN 15713/EN 10571/BS 3100/DIN 1681/DIN17205
Casting Tolerance in Blank ISO 8062 CT 13
Size Tolerance DIN ISO 2768m
NDT ASTM A609 Level 2 or 3 /EN 12680/ASTM E94 Level 2 or 3
Heat Treatment Normalizing+Tempering+Quenching
Hardness As Required

Company Profile

Haian CHINAMFG Casting Co.,Ltd. is established in 2003 in CHINAMFG Town.

In 2007,we moved our factory to Sunzhuang town and now we can supply bigger steel castings with max. weight 45 tons.

In 2011,we built a new sand mold maiking workshop with 120 tons refinining CHINAMFG and the max. weight can be 120 tons.

In 2013,we paid more attenion on the castings for shipbuilding and started to supply marine castings for most of domestic famous shipyards.

From 2013 to 2571,we bought more and more machines to strengthen our ability from rough machining to finished machining.

In 2571,we built another new sand mold making workshop for the quick development of market requirement.

Now we monthly supply 6000 tons different castings for different customers of different industry,such as cement mill,shipubuilding,petroleum machinery,rolling mill,forging press and so on.

 

Prdocution Process

1)Pattern making

We have our own wooden pattern making workshop.
But our company is always busy,
we also have around 10 sub-contractors for pattern making.
They help us for the pattern but will be inspected according to our rules.
We will record for every pattern inspection.

2)Sand core making

We have around 80 technicans for sand core making which is divided into around 10 teams.
Most of the technicans has more than 10 years’ experience.

Most of the sand core is made by silica sand with common sand inside of it.
The common sand will be used repeatly.
For some important position,such as R corner,we will use chorme ore sand.

The outside of the sand core,we will do the painting,burn and clean it.

We will assemble diffrent sand cores together and wait for pouring.

3)Melting and pouring

We always do the melting after mid-night for cheaper electric charge.
And we normally do pouring in the early morning.

No. Equipment Name Quantity(Set)
1 25 tons Electrical Arc Furnace 1
2 50 tons Intermediate Frequency Furnace 2
3 120 tons Refining Furnace 1
4 120 tons VD Furnace 2

4)Cooling
Chemical composition

When we do the pouring,we will also take the sample and check the chemical compositon.

After pouring,we will wait for different time for cooling according to casting’s weight.

Item Weight in blank(Metric Tons) Cooling Time(Hour)
1 <25 48
2 >25-40 72
3 >40-55 96
4 >55-72 120
5 >72-96 144
6 >96-115 168
7 >115 192

5)Heat treatment

The maximum size of the heat treatment CHINAMFG is 12m*9m*6m.
The size also decide the max. size we can make for the casting.

We only can do normalizing and tempering.
The quenching if needed will be done by our sub-contactor.

Cutting the riser,we choose thermal cutting method.

After heat treatment,we will do the mechanical property test.

6)Draw the line and do the first rough machining
We can do the machining from rough to finished machining.

7)NDT after rough machining
 

8)Welding repair
We have rich experience for making support rollers and kiln tyres,
then there is no welding for the outside working position.
This is our special technology.

Every year we supply around 400pcs kiln tyres,930pcs support roller,170 sets gear( in 2 halves).

But for some other castings,if we do the welding repair,
we will do the tempering for stress relief later.

All of our welders have the SGS certficate.
 

9)Final machining
We have a lot of vertical lathes from 2.5m to 10m.
 

 

Certifications

We get approval from CNAS for our laboratory.
We also have 9 class certificate,such as ABS,DNV,NK,RINA,KR,CCS,BV and so on.
 

Packaging & Shipping

We supply a lot of castings for cement mill,rolling mill,shipbuilding and so on.

We can do the packing according to our rules or according to customers’ requirement.

 

 

After Sales Service

Normally there is a 12 months quality warantty.

We do at least 3 times NDT:after rough,semi-finished and finished machining.

And also the customer will do the witness during or after finished machining.

If there is also any problem when you receive the castings,
please send us photos and detailed defects,
we will negotiate with you and make a compensation.

A third party inspection before shipment is welcomed.

 

 

 

 

 

Shipping Cost:

Estimated freight per unit.



To be negotiated
Type: Chemical Hardening Sand
Casting Method: Directional Crystallization
Sand Core Type: Sodium Silicate Sand Core
Samples:
US$ 20/kg
1 kg(Min.Order)

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Order Sample

Customization:
Available

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Customized Request

rope pulley

How do rope pulleys compare to other types of pulleys in terms of functionality?

Rope pulleys offer unique functionality compared to other types of pulleys. Here’s a detailed comparison:

1. Mechanical Advantage: Rope pulleys provide mechanical advantage by distributing the load across multiple sheaves and ropes. This allows for easier lifting and moving of heavy loads. Other pulley types, such as fixed pulleys or belt pulleys, do not offer the same mechanical advantage.

2. Directional Changes: Rope pulleys allow for directional changes in the path of the rope or cable. They enable the rope to be redirected as desired, providing flexibility and control in various applications. On the other hand, fixed or single-direction pulleys do not offer the same capability for directional changes.

3. Load Distribution: Rope pulleys distribute the load across multiple ropes or cables, reducing strain and preventing excessive stress on individual components. This load distribution helps improve safety and efficiency. In contrast, other pulley types may not provide the same level of load distribution.

4. Friction: Rope pulleys are designed to minimize friction between the rope and the pulley, allowing for smooth and efficient movement. Low-friction pulleys reduce energy losses and prevent unnecessary wear on the rope. In comparison, some other pulley types may have higher friction and may require additional lubrication to reduce friction.

5. Speed Control: Rope pulleys can be used to adjust the speed of the moving rope by incorporating pulleys with different diameters or groove configurations. This speed control feature is particularly useful in applications where precise control over the speed is required. Other pulley types may not offer the same level of speed control.

6. Flexibility: Rope pulleys provide flexibility in system design and configuration. They can be easily integrated into various setups, allowing for customized solutions based on specific requirements. Other pulley types may have more limited options for customization and flexibility.

7. Multiple Applications: Rope pulleys have a wide range of applications across different industries, including construction, manufacturing, transportation, and entertainment. Their versatility allows them to be used in diverse tasks and operations. While other pulley types may also have specific applications, rope pulleys are more commonly utilized in various scenarios.

8. Reduced Manual Handling: Rope pulleys reduce the need for excessive manual force, making manual handling tasks more efficient and less physically demanding. This can help minimize the risk of fatigue, strain, and injury for workers. Other pulley types may not provide the same level of assistance in reducing manual effort.

In summary, rope pulleys stand out in terms of their mechanical advantage, directional change capability, load distribution, reduced friction, speed control, system flexibility, wide range of applications, and assistance in manual handling. These unique functionalities make rope pulleys a versatile and efficient choice for many cable and rope-based systems.

rope pulley

How do rope pulleys contribute to the efficiency of cable and rope-based systems?

Rope pulleys play a crucial role in enhancing the efficiency of cable and rope-based systems. Here’s a detailed explanation:

1. Mechanical Advantage: Rope pulleys provide mechanical advantage, allowing individuals to move or lift heavy loads with reduced effort. By distributing the load across multiple sheaves and ropes, pulleys can multiply the force applied, making it easier to overcome resistance and move objects. This mechanical advantage improves the overall efficiency of the system by minimizing the effort required to perform tasks.

2. Directional Changes: Rope pulleys enable directional changes in cable and rope-based systems. They allow the rope or cable to change its path, redirecting the force and motion as desired. This capability is crucial in various applications, such as lifting, rigging, and transportation, where precise control of the load’s direction is necessary for efficient operations.

3. Load Distribution: Rope pulleys distribute the load across multiple ropes or cables, reducing the strain on each individual component. By spreading the load, pulleys help prevent excessive stress and potential failure of the ropes or cables. This load distribution improves the overall efficiency and safety of the system by ensuring that the load is evenly supported.

4. Reduced Friction: Well-designed rope pulleys minimize friction between the rope and the pulley, allowing for smooth and efficient movement. Low-friction pulleys reduce energy losses due to friction, optimizing the system’s efficiency. They also help to prevent unnecessary wear and damage to the rope, extending its lifespan.

5. Speed and Distance: Rope pulleys can be used to increase the speed and distance covered by a rope or cable. By incorporating pulleys with different diameters or groove configurations, the speed of the moving rope can be adjusted. This feature is particularly useful in applications where quick and efficient transportation or lifting of loads is required.

6. System Flexibility: Rope pulleys provide flexibility in system design and configuration. They can be easily integrated into various setups, allowing for customized solutions based on specific requirements. Pulleys can be positioned at different locations, combined in different configurations, and interconnected to achieve the desired mechanical advantage, directional changes, and load distribution.

7. Multi-Purpose Functionality: Rope pulleys have a wide range of applications across different industries. They are used in construction, manufacturing, transportation, mining, entertainment, and many other fields. The versatility of rope pulleys contributes to the efficiency of cable and rope-based systems by enabling their use in diverse tasks and operations.

8. Reduced Manual Handling: By utilizing rope pulleys, manual handling tasks can be made more efficient and less physically demanding. The mechanical advantage provided by pulleys reduces the need for excessive manual force, minimizing the risk of fatigue, strain, and injury for workers.

Rope pulleys significantly enhance the efficiency and effectiveness of cable and rope-based systems. Through mechanical advantage, directional changes, load distribution, reduced friction, speed control, system flexibility, multi-purpose functionality, and reduced manual handling, pulleys optimize the performance of these systems, making them more productive, safe, and reliable.

rope pulley

What materials are typically used in the construction of rope pulleys?

Rope pulleys are constructed using a variety of materials, each chosen for its specific properties and suitability for the intended application. Here are some materials commonly used in the construction of rope pulleys:

  • Metal: Metal pulleys, such as those made of steel or aluminum, are widely used due to their strength, durability, and resistance to wear. Steel pulleys are particularly favored for heavy-duty applications where high load capacities and robust construction are required. Aluminum pulleys offer a lighter alternative while still maintaining good strength.
  • Plastic: Plastic pulleys, often made from materials like nylon or high-density polyethylene (HDPE), are popular for their lightweight nature, corrosion resistance, and low friction properties. They are commonly used in applications where weight reduction and resistance to chemicals or harsh environmental conditions are essential.
  • Ceramic: Ceramic pulleys are known for their high hardness, excellent wear resistance, and low friction characteristics. They are suitable for applications where extreme operating conditions, such as high temperatures or corrosive environments, are present.
  • Composite Materials: Pulleys made from composite materials, such as carbon fiber reinforced polymers (CFRP), offer a combination of strength, low weight, and corrosion resistance. These materials are often used in high-performance applications where both strength and weight reduction are critical factors.
  • Brass or Bronze: Brass or bronze pulleys are sometimes used in specific applications that require good corrosion resistance, such as marine or outdoor environments. These materials also offer favorable self-lubricating properties, reducing friction and wear.
  • Wood: In certain traditional or specialized applications, wooden pulleys may still be used. Wood can provide sufficient strength and low friction properties for lighter load requirements. However, wood pulleys are less common in modern industrial settings.

The choice of material depends on factors such as load capacity, environmental conditions, desired weight, friction requirements, and cost considerations. Manufacturers select the most appropriate material to ensure optimal performance, longevity, and safety in the specific application of the rope pulley.

China Good quality Large Cast Steel Rope Sheave with Groove Hardening   with high quality China Good quality Large Cast Steel Rope Sheave with Groove Hardening   with high quality
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