China Best Sales Large Cast Steel Rope Sheave with Groove Hardening belt pulley

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.

 

 

 

 

 

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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Customization:
Available

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Currency: US$
Return&refunds: You can apply for a refund up to 30 days after receipt of the products.

rope pulley

What is the significance of rope diameter in selecting the right rope pulley?

The rope diameter plays a significant role in selecting the right rope pulley. Here’s a detailed explanation:

1. Compatibility: The rope diameter must match the groove size of the pulley. Choosing a pulley with a groove that is too small for the rope diameter can result in excessive friction, wear, and potential damage to the rope. Conversely, selecting a pulley with a groove that is too large may cause the rope to slip or become unstable during operation. Therefore, selecting a rope pulley that is compatible with the specific rope diameter ensures proper engagement and efficient functioning.

2. Load Capacity: The rope diameter directly affects the load capacity of the pulley system. Thicker ropes typically have higher load-bearing capabilities due to their increased strength and durability. When selecting a rope pulley, it is crucial to consider the anticipated load requirements and choose a pulley that can safely support the expected loads for the given rope diameter.

3. Bending Radius: The rope diameter determines the minimum bending radius required for the rope to pass through the pulley. Using a pulley with a smaller bending radius than the rope diameter can cause excessive strain and deformation of the rope, leading to premature failure. It is essential to select a rope pulley that accommodates the bending radius recommended for the specific rope diameter to ensure the longevity and reliability of the system.

4. Efficiency: The rope diameter also affects the overall efficiency of the pulley system. Thicker ropes generally have lower flexibility and increased resistance to bending, which can result in higher friction losses within the pulley. Choosing a pulley with an appropriate groove size for the rope diameter helps minimize friction and energy losses, improving the overall efficiency of the system.

5. Application Specifics: Different applications may require specific rope diameters based on factors such as load requirements, environmental conditions, and safety considerations. For example, heavy-duty applications may necessitate thicker ropes to handle larger loads, while lighter applications may utilize thinner ropes for easier handling and reduced weight. Selecting the right rope pulley involves considering the application-specific requirements and matching them with the appropriate rope diameter.

6. Manufacturers’ Recommendations: It is important to consult the manufacturers’ recommendations and guidelines for selecting the right rope pulley based on the rope diameter. Manufacturers often provide specifications and compatibility charts that outline the suitable pulley options for different rope diameters. Following these recommendations ensures optimal performance, safety, and reliability of the rope pulley system.

Considering the significance of rope diameter in selecting the right rope pulley is crucial for ensuring proper engagement, load capacity, bending radius compliance, efficiency, application suitability, and adherence to manufacturers’ guidelines. By choosing a rope pulley that matches the specific rope diameter, the overall performance and longevity of the pulley system can be maximized.

rope pulley

What maintenance practices should be followed to ensure the reliability of rope pulleys?

To ensure the reliability of rope pulleys, several maintenance practices should be followed. Here’s a detailed explanation:

1. Regular Inspection: Conduct regular visual inspections of rope pulleys to identify any signs of wear, damage, or misalignment. Inspect the sheaves, bearings, axles, and attachment points for any abnormalities. Promptly address any issues to prevent further damage and ensure the smooth operation of the pulley system.

2. Cleaning: Keep the rope pulleys clean and free from dirt, debris, or contaminants. Use appropriate cleaning methods and tools to remove any buildup that can impair the pulley’s performance or cause unnecessary wear on the rope.

3. Lubrication: Follow the manufacturer’s recommendations for lubrication. Apply the appropriate lubricant to the bearings, axles, and other moving parts to reduce friction and ensure smooth rotation. Regularly check and replenish lubrication as needed, taking into account the operating conditions and load requirements.

4. Tension Adjustment: Maintain the proper tension in the rope. Periodically check the tension and adjust it as necessary to prevent slack or excessive tension, which can affect the pulley’s performance and increase wear on both the rope and the pulley.

5. Replacement of Worn Components: Over time, certain components of rope pulleys may wear out and require replacement. This includes worn-out sheaves, damaged bearings, or deformed axles. Regularly inspect these components and replace them when necessary to maintain the reliability and integrity of the pulley system.

6. Environmental Considerations: Take into account the environmental conditions in which the rope pulleys operate. For example, in corrosive environments, use pulleys made from corrosion-resistant materials or apply appropriate coatings to protect against corrosion. Consider environmental factors such as temperature, humidity, and exposure to chemicals when determining the maintenance practices for rope pulleys.

7. Training and Documentation: Ensure that maintenance personnel receive proper training on inspecting, cleaning, lubricating, and maintaining rope pulleys. Keep detailed documentation of maintenance activities, including inspection results, lubrication schedules, and component replacements. This documentation helps track the maintenance history and enables proactive maintenance planning.

8. Manufacturer’s Guidelines: Always refer to the manufacturer’s guidelines and recommendations for maintenance practices specific to the rope pulleys being used. Manufacturers often provide specific instructions on inspection intervals, lubrication types, and other maintenance considerations to maximize the reliability and lifespan of their pulley products.

By following these maintenance practices, the reliability of rope pulleys can be ensured. Regular inspections, proper cleaning, lubrication, tension adjustment, component replacement, consideration of environmental factors, training of personnel, and adherence to manufacturer’s guidelines all contribute to the longevity and smooth operation of rope pulley systems.

rope pulley

How do rope pulleys assist in lifting and moving heavy loads?

Rope pulleys play a crucial role in lifting and moving heavy loads by providing mechanical advantage and facilitating the transfer of force. Here’s a detailed explanation of how rope pulleys assist in these tasks:

1. Mechanical Advantage: Rope pulleys are designed to increase the mechanical advantage in lifting and moving operations. They achieve this by redirecting the force applied to the rope, making it easier to lift or move heavy loads. The mechanical advantage obtained depends on the configuration of the pulley system used.

2. Change in Direction: Rope pulleys change the direction of the force applied to the rope. By redirecting the force, they enable lifting and moving loads in a controlled manner. For example, a pulley system can change the direction of the force from a vertical pull to a horizontal pull, allowing for the movement of loads along different paths.

3. Load Distribution: Rope pulleys distribute the load across multiple ropes or cables. By using multiple pulleys in a system, the load can be divided among the ropes, reducing the strain on each individual rope. This load distribution helps prevent overload and promotes safer lifting and moving operations.

4. Increased Efficiency: Rope pulleys enhance the efficiency of lifting and moving heavy loads. By reducing the effort required to lift the load, they allow operators to exert less force while achieving the desired movement. This increased efficiency translates to improved productivity and reduced physical strain on the operators.

5. Versatility and Flexibility: Rope pulley systems offer versatility and flexibility in lifting and moving applications. They can be easily adapted to different load sizes and weights by adjusting the number and arrangement of pulleys. This adaptability enables efficient handling of a wide range of loads in various industries and settings.

Overall, rope pulleys provide mechanical advantage, change the direction of force, distribute loads, increase efficiency, and offer versatility in lifting and moving heavy loads. Their use in various industries and applications significantly improves productivity, safety, and operational effectiveness.

China Best Sales Large Cast Steel Rope Sheave with Groove Hardening   belt pulley	China Best Sales Large Cast Steel Rope Sheave with Groove Hardening   belt pulley
editor by CX