Product Description
About Us
Established in 1988, HangZhou LD Machinery Co, LTD. (hereinafter referred to “LD”) is a leading manufacturer specializing in the design, research, development, manufacture and marketing in the hydraulic industry. Being one of major suppliers of customized components and cylinders for manufacturers spreaded all over the world, the company is committed to offer high quality products with competitive prices and excellent service worldwide.
Headquartered in HangZhou City, ZHangZhoug Province, the company wholly owns a subsidiary production factory named “HangZhou YUEWEI Hydraulic Technology Co., Ltd”, which covers an area of more than 380,000 square meters, possesses abundant technical strength and sound production management system, superior machining production equipment, strict and effective quality control system, advanced and excellent inspection instruments.
More than 35 years experience in machining industry, with over 10 experienced technical engineers and 150 skilled workers, LD has a senior engineering technical team with special skills and rich experience in product design, casting, forging, and CNC machining, can handle special material, structure, defect and processing, meet the evolving needs, and provide optimal solution and real one-stop service to customers.
Hydraulic Cylinder Producing Process
Step1: Quality Control on Raw Material
We have our own lab in factory, inspect the raw material and do the test. For every batch of material we received, we will ask supplier provide their certificate, and then cut them to do the test again to see if the results match the certification. Also, every batch we received, we will cut them into pieces to check the air bubbles. Once they are all qualified, we will accept it, and all detail information will be recording in our ERP system. We will also pay lot of attention on the salt spray test for chrome rod. Every month, we will cut the material, put them into test machine to see if it reach the requirement. All the result will be recorded at our QC department. If customer need, we can provide it.
Step2: Quality Control on Machining
we start doing components machining from 1988 with 36 years experience now and insist doing 100% inspection. We spend lots of money, invest on auto robots and machines. Now half of the producing line is by robot so that we can ensure our quality be stable good. For every part of the cylinder, we do 3 times inspecting. Firstly, workers will do self inspection. Secondly, we have tour-hour inspection checking the products, 2 times in the morning and 2 times in the afternoon, make sure that every step is good. After the products are all completed, we will do 100% inspection. For thread, for the tolerance, everything, we need double check. Also, we have specific warehouse just for the measuring tools. Every inspector have their own measuring tool and we will check the measuring tools regularly to make sure they are all in good condition, so that the measuring results will be convincing.
Step3: Quality Control on Welding
We are qualified to AWS certification, which is very popular in North American market. First, for the visual test, we will make sure that every components are welded good, look beautiful. And the second, we need to check the penetration. We have more than 15 years experience, we do know what kind of designing angle can make the cylinder welding strong. Once we finish the first article, we will cut it and analyse the welding to see if it is fulfill the groove. And then do the radiographic testing to make sure there is no gap inside. What’s more, we will do the ultrasonic test to check the program for the robot. Now 80% of welding is doing by robot. Once the program confirmed, no 1 can change it unless the welding manager, and they only have 5% right.
Step4: Quality Control on Assembling
For assembling, we have some difference with others. The brand we uses for seals are all those famous brand like Aston, Parker, Hallite. The cylinder we give to our customer has 2 years warranty. For our company, we engrave our part number and manufacturing date for the quality warranty. So no matter for seals or any others, as long as they are parts of cylinder, if it is under 2 years, we will take responsibility for them. And we will do the test for every cylinder like for pressure after we finish assembling.
Step5: Quality Control on Painting
We have our half auto painting line. Right now, we can paint about 1500 cylinders per day, which is about 1 container. Before we do the painting, we will do the wash first and for every cylinder, we will test for hardness, thickness and adhesion to make sure the painting are all good, which will be recorded into OQC report, print out and stick on the box, ship to you with your products.
Step6: Hydraulic Cylinder Packing
For every cylinder, we have the stick to show the detail information like bore size, stroke and working pressure. And we will use individual plastic bag packing. If customer need, we can also use individual carton box packing. We will fasten 1 floor after 1 floor with plat, so customer can only cut what they need and other layer will still be fasten. Moreover, there will be plywood pallet or plywood box for customer choosing. We will also send the loading picture to customer after we ship them to make sure everything is well loaded in China.
Packing Reference
Order Process
Enterprise Features
FAQ
Q1. What is LD product’s quality assurance?
100% inspection for each product before shipping with inspection rereport for tracking.
Q2: How long is the warranty on LD products?
The warranty is 2 years for general products since the date of shipment.
Q3: How LD deal with the quality problem during warranty period?
1. LD will take the corresponding cost caused by customer local reparing.
2. LD will provide the product by free if the repair cost is higher than the product value, but the freight involved shall be borne by customer side.
Q4: How to ensure the order can be shipped on time?
LD will send the “production schedule” every week after receiving customers’ orders. If any delays, LD will inform customers 3 weeks in advance, so as to facilitate the customer to arrange the schedule.
Q5: Does LD offer delivery service?
Yes. LD has deep cooperation with logistics companies all over the world to provide customers with quick and convenient “Door-to-Door services”,including sea, air and express.
Q6: How LD control the product quality?
1. Raw materials: We will test the material of each batch of raw materials we receive, and the piston rod will be tested with salt spray. This is to ensure that the material of our products meets the requirements at the beginning.
2. Processing: We have the leading machining equipment, and obtained ISO9001 certification.
3. Welding: Our factory is equipped with welding robots, and has obtained the AWS certification.
4. Assembly pressure test: 100% testing with OQC report for cHangZhou. The seals we use are: Hallite, Aston and Gapi
/* January 22, 2571 19:08:37 */!function(){function s(e,r){var a,o={};try{e&&e.split(“,”).forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1
| Certification: | ISO9001 |
|---|---|
| Pressure: | Medium Pressure |
| Work Temperature: | Normal Temperature |
| Acting Way: | Double Acting |
| Working Method: | Straight Trip |
| Adjusted Form: | Regulated Type |
| Samples: |
US$ 299/Piece
1 Piece(Min.Order) | |
|---|
| Customization: |
Available
|
|
|---|
What advantages do telescopic cylinders offer in heavy equipment?
Telescopic cylinders offer several advantages in heavy equipment applications. Here’s a detailed explanation:
Compact design:
Telescopic cylinders have a compact design that allows for a relatively small retracted length compared to their extended length. This compactness is advantageous in heavy equipment where space is limited. The reduced length enables the equipment to have a smaller footprint, making it easier to maneuver in confined areas and transport on trailers or trucks.
Extended reach:
Telescopic cylinders provide extended reach capabilities, which is beneficial in heavy equipment operations. The nested design allows for multiple stages to extend, enabling the cylinder to reach greater distances. This extended reach is particularly useful in applications where the equipment needs to lift or push loads over obstacles, reach into deep pits, or access elevated areas.
High force output:
Telescopic cylinders are capable of generating high force output, making them suitable for heavy lifting and pushing tasks. The hydraulic system used in telescopic cylinders allows for amplification of force through the application of hydraulic pressure. This high force output is advantageous in heavy equipment applications that require lifting and moving heavy loads or exerting significant pushing or pulling forces.
Customizable load capacity:
Telescopic cylinders offer load capacity customization. The modular nature of telescopic cylinders allows for the addition or removal of stages, which directly affects the cylinder’s load capacity. By adjusting the number of stages, the cylinder’s load capacity can be tailored to the specific requirements of the heavy equipment, ensuring optimal performance and safety.
Smooth operation:
Telescopic cylinders provide smooth and controlled operation. The hydraulic control system allows for precise control of the cylinder’s extension and retraction, ensuring smooth and synchronized movement of multiple stages. This smooth operation is important in heavy equipment applications where precise positioning, lifting, or pushing is required to avoid damage to the equipment or the load.
Durability and reliability:
Telescopic cylinders are built to withstand heavy-duty usage in demanding environments. They are designed using robust materials and undergo rigorous testing to ensure durability and reliability. The cylinders can withstand high load capacities, harsh operating conditions, and repetitive cycles, making them well-suited for heavy equipment applications that involve continuous and demanding operations.
Overall, telescopic cylinders offer advantages such as compact design, extended reach, high force output, customizable load capacity, smooth operation, durability, and reliability. These advantages contribute to improved efficiency, productivity, and performance of heavy equipment in various industries.
It’s important to consult the manufacturer’s specifications and guidelines to ensure the appropriate selection and application of telescopic cylinders in heavy equipment.
How do telescopic cylinders contribute to precise reach and manipulation?
Telescopic cylinders play a crucial role in enabling precise reach and manipulation in various applications. Here’s a detailed explanation:
Extended reach:
Telescopic cylinders allow for extended reach in equipment such as cranes, excavators, booms, and material handling machinery. The nested design of telescopic cylinders, with multiple stages that retract inside one another, enables the equipment to achieve a longer reach when required. By extending the telescopic cylinder, operators can access objects or work areas that are located at a distance.
Precise positioning:
Telescopic cylinders provide precise positioning capabilities, allowing operators to manipulate objects with accuracy. The hydraulic control system regulates the extension and retraction of each stage of the cylinder, enabling smooth and controlled movement. This precise control is essential in applications that require accurate placement or manipulation of objects, such as in construction, manufacturing, or material handling.
Load handling:
Telescopic cylinders contribute to precise load handling by providing the necessary force and control. The cylinders are designed to handle heavy loads and can exert the required power to lift, lower, or manipulate objects with precision. The hydraulic control system allows operators to adjust the speed and movement of the telescopic cylinder, ensuring safe and controlled load handling.
Adaptability:
Telescopic cylinders offer adaptability in reaching and manipulating objects in various environments. Their nested design allows for compact retraction, making them suitable for applications with limited space. The ability to extend and retract the telescopic cylinder provides flexibility in adjusting the reach and adapting to different working conditions.
Support for attachments:
Telescopic cylinders often support attachments or tools that enhance reach and manipulation capabilities. For example, in excavators, telescopic cylinders are used to extend the boom or arm, while additional attachments such as buckets or grabs facilitate precise material handling or excavation tasks.
Overall, telescopic cylinders contribute to precise reach and manipulation by offering extended reach, precise positioning, load handling capabilities, adaptability, and support for attachments. Their hydraulic control system and nested design enable operators to achieve accurate and controlled movements, enhancing productivity and efficiency in various applications.
It’s important to consult the equipment manufacturer’s documentation and guidelines for specific information on the telescopic cylinder’s capabilities, operating parameters, and recommended maintenance practices to ensure optimal performance and safety.
Can telescopic cylinders be used for both lifting and pushing applications?
Yes, telescopic cylinders can be used for both lifting and pushing applications. Here’s a detailed explanation:
Lifting applications:
Telescopic cylinders are commonly employed in lifting applications where they provide the necessary force and stroke length to lift heavy loads. The nested structure of telescopic cylinders allows for extended stroke lengths while maintaining a compact retracted length. The hydraulic system supplies pressurized fluid to each stage, generating the force required for lifting. As the stages extend, the load is raised to the desired height.
Pushing applications:
In addition to lifting, telescopic cylinders can also be used for pushing applications. In these cases, the telescopic cylinder applies force in the opposite direction, typically to move or push objects or components. The hydraulic system supplies pressurized fluid to each stage, causing the stages to extend and exert a pushing force. The nested structure of the cylinder ensures that the force is transmitted through each stage, allowing for effective pushing.
Benefits of telescopic cylinders for lifting and pushing:
Telescopic cylinders offer several benefits for both lifting and pushing applications:
- Extended stroke length: Telescopic cylinders provide a longer stroke length compared to other types of cylinders, allowing for increased reach and movement in lifting and pushing operations.
- Compact retracted length: Despite their extended stroke length, telescopic cylinders have a compact retracted length. This is advantageous when space is limited or when a shorter cylinder length is desired.
- High force capabilities: Telescopic cylinders are designed to handle heavy loads and can generate significant force, making them suitable for lifting and pushing applications that require substantial power.
- Adjustability and flexibility: The hydraulic control system of telescopic cylinders allows for adjustability in terms of force, speed, and stroke length, providing flexibility and adaptability to different lifting and pushing requirements.
- Versatility: Telescopic cylinders can be used in various industries and applications, including construction, material handling, automotive, and more, making them versatile solutions for lifting and pushing tasks.
It’s important to consider the specific requirements of the lifting or pushing application and consult the manufacturer’s guidelines to ensure the proper selection, installation, and operation of telescopic cylinders in order to achieve safe and efficient performance.
editor by CX 2024-04-16