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 |
|---|
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.
Are there safety considerations when working with rope pulley systems?
Yes, there are several safety considerations that should be taken into account when working with rope pulley systems. Here’s a detailed explanation:
1. Proper Training: Individuals involved in working with rope pulley systems should receive proper training on their operation, maintenance, and safety procedures. This includes understanding the correct use of equipment, knowledge of potential hazards, and the ability to identify and respond to emergency situations.
2. Load Capacity: It is crucial to ensure that the rope pulley system is not overloaded beyond its specified load capacity. Overloading can cause excessive stress on the pulleys, ropes, and other components, leading to potential failures and accidents. Always adhere to the manufacturer’s recommendations and guidelines regarding load limits.
3. Inspection and Maintenance: Regular inspections and maintenance of rope pulley systems are necessary to identify any signs of wear, damage, or malfunction. Inspecting sheaves, ropes, attachment points, and other components can help detect issues before they escalate into safety hazards. Promptly address any identified problems through proper maintenance and repair procedures.
4. Proper Rope Selection: Selecting the appropriate rope type and size for the specific application is crucial for safety. The rope should have sufficient strength and durability to handle the anticipated load and environmental conditions. Consider factors such as abrasion resistance, breaking strength, and compatibility with the pulley system when choosing the rope.
5. Protective Equipment: Personal protective equipment (PPE) should be used when working with rope pulley systems, especially in high-risk environments. This may include items such as safety helmets, gloves, eye protection, and fall protection equipment, depending on the nature of the task and associated hazards.
6. Secure Anchoring: Ensure that the anchor points used for supporting the rope pulley system are secure and able to withstand the anticipated loads. Unstable or insufficiently anchored pulley systems can lead to accidents and injuries. Consider factors such as the strength of the structure or anchoring point, and use appropriate hardware and rigging techniques.
7. Clear Communication: Clear communication among workers involved in rope pulley operations is essential for safety. Establishing effective communication protocols, including signals and commands, helps prevent misunderstandings and ensures coordinated actions during tasks.
8. Fall Prevention: When working at heights or in elevated positions using rope pulley systems, fall prevention measures must be employed. This may include the use of proper harnesses, lanyards, and fall arrest systems to protect workers from potential falls.
9. Emergency Preparedness: Have appropriate emergency response plans in place in case of accidents or equipment failures. This includes procedures for rescue, first aid, and evacuation. Regularly practice emergency drills to ensure that all personnel are familiar with the protocols.
10. Compliance with Regulations: Follow relevant safety regulations, codes, and standards specific to your industry and jurisdiction. These regulations may include requirements related to equipment inspection, maintenance, training, and safe work practices.
It is crucial to prioritize safety when working with rope pulley systems. By implementing proper training, conducting regular inspections, adhering to load capacity limits, using appropriate PPE, securing anchor points, promoting clear communication, and following safety regulations, the risk of accidents and injuries can be significantly reduced.
Are there variations in rope pulley sizes and configurations?
Yes, there are variations in rope pulley sizes and configurations to cater to different applications and load requirements. Here’s a detailed explanation:
1. Sizes: Rope pulleys come in a range of sizes to accommodate various rope diameters and load capacities. Smaller pulleys are typically used for lighter loads or in situations where space is limited. Larger pulleys are employed for heavier loads and applications where additional mechanical advantage is required. The size of the pulley is determined based on factors such as the diameter and type of rope used, the anticipated load, and the available space for installation.
2. Configurations: Rope pulleys can be configured in different ways to suit specific requirements. Some common configurations include:
- Single Pulley: A single pulley consists of a single wheel with a grooved rim and a stationary or movable axle. It is used for basic redirection of force and change in direction.
- Double Pulley: A double pulley, also known as a block and tackle, consists of two pulleys mounted on a common axle. It provides increased mechanical advantage by dividing the load between the two ropes. Double pulleys are commonly used in lifting heavy loads.
- Multiple Pulleys: Pulley systems can be created by combining multiple pulleys. These systems can include fixed and movable pulleys arranged in various configurations, such as the compound pulley system or the complex block and tackle system. Multiple pulley configurations offer higher mechanical advantage and are used for lifting extremely heavy loads with reduced effort.
The choice of pulley size and configuration depends on factors such as the weight and type of load, the required mechanical advantage, the available space, and the specific application. Engineers, riggers, and designers consider these factors to select the most appropriate pulley size and configuration to ensure safe and efficient lifting and movement of loads.
editor by CX