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) | Order Sample |
|---|
| Customization: |
Available
| Customized Request |
|---|
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.
What role do bearings play in ensuring the smooth operation of rope pulley systems?
Bearings play a crucial role in ensuring the smooth operation of rope pulley systems. Here’s a detailed explanation of their role:
1. Reducing Friction: Bearings are designed to reduce friction between moving parts. In a rope pulley system, the bearings are typically located at the axle or the sheave, where the rope makes contact. By providing a smooth surface for the rope to glide over, bearings minimize friction and prevent excessive wear on both the rope and the pulley. This reduction in friction enhances the overall efficiency of the system.
2. Supporting Load: Rope pulley systems often handle substantial loads. Bearings provide support and distribute the load evenly across the pulley, ensuring smooth and stable operation. They help prevent excessive stress on the pulley components and maintain the integrity of the system, even under heavy loads.
3. Enabling Rotation: Bearings facilitate the rotation of the pulley. They allow the pulley to rotate freely around the axle or sheave, enabling the rope to move smoothly. This rotation is essential for changing the direction of the force and facilitating the lifting or movement of the load. Bearings ensure that the rotation is effortless and consistent, contributing to the smooth operation of the pulley system.
4. Increasing Durability: By reducing friction and supporting the load, bearings contribute to the durability of the rope pulley system. They help prevent excessive wear and damage to the pulley components, extending the lifespan of the system. Additionally, bearings are often designed to withstand heavy loads, harsh environments, and repetitive motion, further enhancing the longevity and reliability of the pulley system.
5. Minimizing Maintenance: The use of bearings in rope pulley systems reduces the need for frequent maintenance. The smooth operation provided by bearings reduces wear on the pulley and the rope, resulting in less frequent replacement and maintenance. This helps optimize the uptime of the system, reducing downtime and associated costs.
In summary, bearings play a vital role in ensuring the smooth operation of rope pulley systems by reducing friction, supporting the load, enabling rotation, increasing durability, and minimizing maintenance requirements. Their use enhances the efficiency, reliability, and lifespan of the pulley system, making them an essential component in various lifting and moving applications.
Can you explain the different types of rope pulleys and their functions?
There are different types of rope pulleys, each designed to serve specific functions and applications. Here’s an explanation of some common types of rope pulleys and their respective functions:
- Fixed Pulley: A fixed pulley has a stationary axle and does not provide any mechanical advantage. It changes the direction of the force applied to the rope, making it easier to pull or lift loads vertically. Fixed pulleys are often used in combination with other pulleys to create more complex pulley systems.
- Movable Pulley: A movable pulley has an axle that is free to move, allowing it to be attached to the load being lifted. When a rope passes through a movable pulley, the pulley and the load both move in the same direction. Movable pulleys provide a mechanical advantage by reducing the effort required to lift heavy loads.
- Block and Tackle: A block and tackle system consists of multiple pulleys arranged in a combination of fixed and movable pulleys. This arrangement provides a significant mechanical advantage, allowing for the lifting of extremely heavy loads with reduced effort. Block and tackle systems are commonly used in construction, rigging, and maritime applications.
- Snatch Block: A snatch block is a specialized type of pulley with a side opening that allows the rope to be easily inserted or removed. Snatch blocks are often used in rigging to redirect the force applied to the rope and change its direction. They are particularly useful in situations where the rope needs to be redirected around obstacles or to achieve a different pulling angle.
- Wire Rope Pulley: Wire rope pulleys are designed specifically for use with wire ropes, which are commonly used in heavy-duty lifting and rigging applications. Wire rope pulleys have grooves specifically shaped to accommodate wire ropes, ensuring proper alignment and reducing wear on the rope.
- Rescue Pulley: Rescue pulleys are specialized pulleys designed for use in rescue operations and emergency situations. They are typically lightweight, compact, and feature additional safety features such as locking mechanisms or built-in swivels to facilitate efficient and safe rope handling.
These are just a few examples of the different types of rope pulleys available. The choice of pulley type depends on the specific requirements of the application, including the desired mechanical advantage, load capacity, rope type, and environmental conditions. By selecting the appropriate pulley type, users can optimize the efficiency, safety, and performance of their lifting, pulling, or redirecting operations.
editor by CX