How To Specify Hydraulic Hose Fittings

Hydraulic hose fittings connect hoses to pumps, valves, cylinders, and other components used in the entire hydraulic system. These safe connections help control and direct the flow of hydraulic fluid to where it is needed, while preventing leakage and maintaining pressure safely.

Experts say it is beneficial to distinguish hoses from complete hose assemblies. Although the choice of hose is obviously important, choosing a hose without considering accessories can be a costly mistake. Any hose assembly includes accessories for specific applications. Industrial hose assemblies must have hoses, fittings, and methods to connect the fittings to the hoses. For most hydraulic hoses, the fitting has a barbed end, which is inserted into the inner diameter of the hose, and a shell or clamp, which is connected to the cover or reinforcement.

Hydraulic hoses

Crimping is the most common method of assembling hoses and fittings. Once the crimp specifications of the specific hose and accessories are checked, the crimping machine is adjusted to the proper crimp diameter setting. The next step is to lubricate the tube, push it into the end of the hose, and then insert the tube into the crimping die. Start the crimping device, close the mold and permanently compress the fitting onto the hose.

Many companies offer no-skive options on their hoses. Peeling refers to a process in which part of the hose cap or even the inner tube is removed-the reinforcement layer is exposed-before the hose end is connected. No-skive hose does not require this step. Many users prefer the no-slip option because it makes hose assembly faster and reduces the risk of hose damage during crimping.

Therefore, in addition to hoses, users must also choose accessories based on chemical compatibility and connection safety. In addition, it is also necessary to consider the segmentation of the application, such as operating pressure, flow capacity, environmental and temperature extremes, and operating fluids.

When installing the hose assembly, pay attention when determining the thread of the connection. Usually, it is connected from one standard to another standard port, but there is not enough contact to ensure safety. In addition, most of the accessories are certain hoses of a specific brand, and may not cooperate with other brands. Although the size of the joint usually corresponds to the size of the wire, there may still be differences in the choice of joints for the same size hose.

For safe and durable hydraulic components, the "correct" components are couplings, hoses, crimping equipment and accessories, which are designed to work together. Tolerances vary from manufacturer to manufacturer and are not interchangeable. Different components from different manufacturers may adversely affect the coupling retention. Accidental mixing and matching may cause hose rupture, joint leakage and blow-out ends, injuring or even killing workers.

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Introduction Of Abrasion-Resistant Steel Plate (AR plate)

What is AR plate?

Abrasion-resistant steel plate (AR plate) is a special plate product of high-carbon alloy steel plate, which is mainly used for work that will produce large-area wear. Wear-resistant steel plates are welded on the surface of low-carbon steel or low-alloy steel to form one or more layers of alloys with higher hardness, weather resistance and higher wear resistance, and have better plasticity and toughness. The thickness of this alloy wear-resistant layer is generally 1/3 ~ 1/2. It is adding carbon, manganese, nickel, chromium, boron and other alloys to the steel plate to relatively increase the hardness and toughness of the steel plate. Adding carbon can increase the hardness of the steel plate, but if we add too much carbon to the steel plate, it will become brittle and reduce the tensile strength.

Commonly used in:

Because the wear resistant plate mainly has high wear resistance and good impact performance, it is suitable for welding, cutting, bending, etc. From the point of view of its material, the cost performance is very high, so it has been welcomed by the public in recent years. It is widely used in industrial fields with more extreme environments, such as heavy industrial equipment, mining, electric power, agriculture, construction, and cement industries. This kind of wear-resistant steel plate is very convenient and time-saving in the repair process.

AR plate characteristics

The advantages of wear-resistant steel plates are as follows:

1) Good wear resistance

The wear-resistant steel plate has a layer of alloy wear-resistant layer on the outside, and the composition of this layer of alloy wear-resistant layer contains chemical elements such as carbon and chromium, making it twice the hardness and wear resistance of ordinary steel plates.

2) Strong impact resistance

According to what we mentioned above, there are mainly two layers of wear-resistant steel plates, the base material is low-carbon steel or low-alloy steel plate and a layer of alloy wear-resistant layer. The outer alloy wear-resistant layer can be used to resist the wear of the wear medium, and the inner base material can withstand the load of the medium, so as to achieve good impact resistance. At the same time, it can withstand the impact and abrasion of the high drop hopper in the material conveying system.

3) Good heat resistance

Adding vanadium, molybdenum and other alloys to the alloy wear-resistant layer can increase the heating degree of the steel plate. Approximately can withstand high temperature wear ≤800℃.

4) Superior corrosion resistance

Since the alloy layer of the wear-resistant composite steel plate contains a large amount of metallic chromium, it has good rust and corrosion resistance.

5) Convenient processing performance

The wear-resistant steel plate can be processed into various industrial parts through cutting, bending, welding, etc. according to the needs of the project.

Abrasion-resistant steel plates have higher hardness than ordinary steel plates, and have stronger wear resistance and corrosion resistance.

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What Is Wear-Resistant Steel Plate?

 In manufacturing and construction, the composition and grade of the steel plate material used have a huge impact on the final product. Abrasion resistant steel plate is an ordinary steel plate with harder quality. Compared with ordinary high-strength structural steel plate, the durability time is about 4 times.

However, what makes it stronger, and how do you know when a project needs wear-resistant steel?

What is wear-resistant steel plate?

Abrasion-resistant (AR) steel plate is a high-carbon alloy steel plate. Due to the addition of alloys, AR has formability and weather resistance. Due to the addition of carbon, its hardness is higher.

The addition of carbon during the formation of the steel plate significantly increases the hardness and toughness of the steel plate, but the strength decreases. Therefore, AR plates are used under conditions where wear and abrasion are the main causes of failure. AR plates are not perfect in structural construction applications, such as supporting beams in buildings or bridges.

Common applications for AR plates include dump truck liners, grates, buckets, construction accessories, conveyor belts, body armor and ballistic panels (and as targets for shooting ranges).

How is abrasion-resistant steel made?

The main alloying elements of abrasion-resistant steel are iron (Fe) and carbon (C), although various low-content and trace minerals are added to adjust the chemical and mechanical properties of the final product. First, the raw iron is melted in a blast furnace, and then carbon is added to the melt. Depending on the application area, additional elements such as silicon (Si), nickel (Ni) and molybdenum (Mo) can be added at this stage. Abrasion-resistant steels can contain as much as 0.18-0.30% carbon, and they are medium and low carbon steels.

Once the proper composition is reached, the molten mixture is formed and cut to the proper size. Wear-resistant steel is generally not suitable for quenching and tempering because heat treatment has the risk of reducing material strength and wear resistant properties.

The wear resistance qualities of the abrasion-resistant steel alloy is obtained by strictly controlling the basic mechanical properties of the material. The most important of these are:

Hardness (Brinell hardness), which determines the ability of the material to withstand impact.

Strength (yield and tensile), which determines the structural integrity of the material under high loads.

Abrasion is used to define any process in which the surface of a material wears away due to friction. This may occur where the surface is worn, scratched, or gradually worn out in contact with other parts or materials. This is a common problem in heavy industry, but it can also be a problem for more complex machinery associated with high duty cycles or challenging operating conditions. The solution to this phenomenon is to maintain adequate lubrication of the mating surface, or use suitable wear-resistant materials to optimize performance.

Abrasion resistant steel is an optimized alloy that can withstand surface wear, which can lead to a series of unexpected consequences, from simple aesthetic damage to complete structural damage.

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How To Maintain The Uncoiler

Uncoiler, also known as decoiler, material rack, loading rack, unwinder machine, etc., is an indispensable unwinding device for metal coil to be stamped processing. Like the feeder, it is also a product that must be used on the factory workshop. It is suitable for the continuous stamping processing industry of various auto parts, hardware and electronic parts. We know a lot about several decoilers, and different uncoiler machines have different characteristics.

The decoiler/uncoiler plays a vital role in the cutting production line, pressing production line and various metal production lines. In order to allow it to be used for a longer period of time, we need to pay more attention to daily maintenance. Here are some useful tips.

1. Grease the decoiler/uncoiler mandrel regularly.

2. It is best to expand the coil within the acceptable parameters.

3. Check whether the core rod of the decoiler/uncoiler is stuck or abnormal before starting up.

4. Operate the uncoiler correctly according to the instructions and safety regulations.

5. When abnormal noise is heard, stop the uncoiler immediately.

6. In the metal production line, every operator in charge of different machines must cooperate closely.

Advantages of decoiler:

The decoiler is suitable for conveying various coil materials. Thin thin metal and non-metal materials can be equipped with motor power and feeding device. The brake device is adjustable and the main shaft is reinforced, which makes the rolling of the material roll more stable and increases its carrying capacity. It can automatically produce indispensable parts with the punching machine, saving manpower, material resources, and reducing costs. The effect is very good.

Uncoiler machine can save feeding time and improve production efficiency. It can be used with the calibration machine. It can be equipped with a motor and electrical control instead of a power frame.

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A Guide To Uncoilers

Capital equipment investment is a business that requires consideration of many factors and characteristics. Do you need a machine that can meet current manufacturing needs, or do you want to invest in next-generation features? These are the questions that shopkeepers have been asking themselves when buying a coil front machine. However, research on uncoilers has received little attention.

If you are looking for any machine that runs with a coil, you will undoubtedly need an uncoiler (or decoiler as it is sometimes called). Whether you have roll forming, stamping, or slitting, an uncoiler is needed to unwind the coil for the next process; there really is no other way. Ensuring that the uncoiler meets the needs of your workshop and project is critical to keeping the coiler in shape, because the machine cannot run without material.

In the past 30 years, the industry has undergone great changes, but the uncoiler has always been designed according to the specifications of the steel coil industry. Thirty years ago, the standard outer diameter (OD) of steel coils was 48 inches. As the degree of customization of the machine became higher and higher, the project also required different options, and the length of the coil was adjusted to 60 inches, and then to 72 inches. Nowadays, manufacturers occasionally use sizes above 84-in.coils. Therefore, the uncoiler must adapt to changing coil consumption.

Uncoilers are widely used in the roll forming industry. Today's rollers have more features and capabilities than their predecessors. For example, 30 years ago, roll mills could run at 50 feet per minute (FPM). Now they can run to 500 FPM. This change in roll shape production also increases the capacity and basic range of decoiler options. Merely choosing any standard decoiler is not enough; many factors and functions need to be considered to ensure that the store’s needs are met.

Choosing the right uncoiler

The uncoiler manufacturer offers a variety of options to ensure that the roll forming process can be optimized. When choosing a decoiler, please keep these specifications in mind:

The weight of the coil

Inner diameter and outer diameter of the coil

Coil width

Coil thickness (minimum and maximum)

Number of coils loaded

Roll speed and coil change time

Footprint

Budget

Application/Next Process

You also need to consider the type of project you will be working on and the materials you will use.

It all depends on what you want to run on the roll former, including whether the coil is pre-painted, galvanized, or stainless steel. These specifications will determine the decoiler function you need.

Manufacturers usually don't realize how useful the decoiler is until they realize that, depending on the size of the coil, they can change it 6 to 8 times or more per day. There is a second coil ready and waiting for the machine, eliminating the immediate need for a forklift or crane to load the coil, once the first one is out of the material. The uncoiler plays a vital role in the roll forming environment, especially in large-scale operations, the uncoiler may require 8 hours of shifts to form parts.

When investing in a uncoiler machine, it is important to understand the current specifications and functions. However, it is also important to consider the future use of the machine and what possible future projects will on the roll former. These are all factors that need to be considered accordingly, and really help determine the appropriate uncoiler.

What Is Wear Resistance Steel

Abrasion resistant steel is a steel material with strong wear resistance containing chemical elements such as silicon, manganese, chromium, copper, vanadium and so on.

Production process of wear resistance steel

Wear resistance steels are all smelted by electric furnaces or converters, and most of the products are castings. In recent years, hot-worked materials such as forging and rolling are increasing. The production method of wear resistance steel parts used in general machinery is not much different from other workpieces, but there should be requirements in terms of heat treatment process or surface treatment process to meet the requirements of ensuring wear resistance. For those steel parts whose material metallurgical purity significantly affects wear resistance, refining measures should be taken, and limit requirements for harmful impurities and gases should be put forward. The number, shape and distribution of the second phase outside the matrix often have a significant impact on the wear resistance of steel parts. At this time, it is necessary to coordinate the design of the chemical composition of the steel, smelting, thermal processing, heat treatment (including thermomechanical treatment), etc. Consider it in order to achieve the requirements of improving wear resistance from the aspect of metallurgical factors.

Strengthening technology of wear resistance steel

Wear is a process that occurs on the surface of the workpiece, so it is very important to strengthen the surface of the workpiece. The surface strengthening technology of steel has a long history. For example, the carburizing technology can be traced back to the Han Dynasty in China at least two or more years ago, and the carbonitriding process has been recorded in Chinese history books more than a thousand years ago. In recent decades, various surface strengthening technologies and equipment have developed rapidly. Taking necessary surface strengthening and surface modification measures can not only save a lot of raw materials, but also give the workpiece surface layer a variety of special structure and performance of materials so as to obtain the most excellent wear resistance and huge economic benefits. Today, surface strengthening technology has become an important development direction in the research and application of wear resistance steel(including wear-resistant materials).

Process development of wear resistant steel

In recent years, the surface strengthening (wetting) technology of iron and steel materials has developed rapidly, and new technologies and new processes have emerged one after another. Different surface strengthening technologies can be selected for different needs to improve the wear resistance of steel parts under various types of wear conditions. Use cheaper base materials to make workpieces instead of expensive alloy steels. Carburizing, carbonitriding, nitriding and other processes are still the main measures to strengthen mechanical parts. In addition, casting processes such as infiltration and composite casting are also used in the manufacture of wear resistance steel parts.

Production Capacity Of Vibrating Screen

The more products you plan to sort, the more surfaces you need to filter. The most immediate symptom of a screen that is too small is that its effectiveness is reduced because it cannot let so many particles pass through the holes.

On the other hand, the smaller the size to be sorted, the more surface is required, because the smaller the hole, the less the number of products that can pass.

Vibration frequency of vibrating screen

As a general rule for large classification, low-frequency and large-amplitude vibrations are best, while fine-classified high-frequency and small-amplitude vibrations are best. In other words, if the particle is large, a slow and wide movement is better, in this case the particle jumps are few but large, if it is small, it is smaller than many jumps but smaller. This is a problem that the particles do not pass through several single hop holes.

The importance of feeding properly

In the screen, as in any sorter, it is necessary to use the width of the entire work surface from the beginning. If the product falls on the screen surface "pile", the particles at the top of the pile will not touch the screen or the screen element until the pile is vibrated and disappears. When this happened, it had already crossed half of the earth's surface. In other words, we wasted the surface and caused a very important production loss. At the same time, the area where the piles are located will also be severely worn, and additional maintenance costs will follow. It also increases the risk of clogging, especially for low-density products, if the pile is much higher. This is meaningless, it is impossible to accept correct screening.

This is why it is necessary to pay attention to the implementation and design of the pipes that dump the product on the screen, and use auxiliary means such as vibrating distributors when necessary.

Good screen and bad screen

A good vibrating screen must be reliable, minimize wear and maintenance, and have strong vibration like any vibrating screen: the more it vibrates, the better it goes, that is, it gives more production and efficiency.

On the other hand, most "bad" screens are not really bad, but not suitable for use: if the product is wet and sticky, it will stick to the metal screen instead of the polyurethane screen. If it is dry and fine, the screen should be dust-proof. If you are sieving large and heavy particles, the sieve should be very strong. If it is very sturdy and used with a good product, it will consume more power and maintenance costs than required.

The combinations are endless, and a good choice, suitable for use at the beginning, will save the user from having to remember the machine again in life, or at least until he needs to install another screen.

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