When we talk about the servo hydraulic press, we are talking about a series of hydraulic presses driven by the servo motor instead of the ordinary motor. As thus, a hydraulic press with a servo motor-driven system can also be called a servo press. Currently, in China, the servo hydraulic presses are mainly small-tonnage presses. In order to break through the limitation of the servo motor, the hybrid drive mode is a direction of the servo press development.

Shuntec Press is a professional and leading servo-hydraulic press manufacturer in China for years. With years of engineering and manufacturing experience across dozens of industries and applications, we are confident to build every press to your specifications. The main features of the servo-hydraulic press are:

1. High level of versatility, flexibility, and intelligence.

    The slider motion curve of the servo hydraulic machine is no longer just a sine curve, but an arbitrary curve that can be optimized and designed according to process requirements.

2. High precision

    Because the linear position sensors are used to detect the position of the slider, the slider has motion control accuracy throughout the entire process, especially near the bottom dead center, which can ensure that the accuracy of the slider varies within ±0.01mm; The precision in the production process is stable, and the appearance of product burrs is suppressed to prevent the production of defective products.

3. High productivity

    As the servo hydraulic press retains the advantages of the crank press, the productivity is much higher than that of the ordinary hydraulic press. It can also adjust the stroke of the slider according to the difference of the workpiece. It does not need to complete a 360-degree rotation in one cycle, but only performs a certain angle of the swing. It minimizes unnecessary trips and greatly improves productivity. This helps to further shorten the overall cycle time. 

Double-cylinder high-pressure bulge forming machine is custom designed to achieve the perfect combination of hydraulic pressure and pneumatic pressure. 

It Has The Following Features:

1. The appearance of the equipment is unique and beautiful. The main body adopts a four-column three-plate cylinder under-mounted structure. The pneumatic system, electric control system, and hydraulic system are scientifically arranged in different sections; The four posts are made of high-quality 45# forging materials, and the surface is hard chrome-plated and polished after intermediate-frequency quenching, and the hardness reaches HRC45-50 degrees, which can improve the wear resistance of the columns during the movement of the slider, while ensuring the guiding accuracy (parallelism and perpendicularity), and the ability to withstand strong eccentric loads.

2. The double-cylinder high-pressure bulge forming machine adopts servo-hydraulic system technology and the German-imported quantitative pump to accurately set the pressure, which has no overflow compared with the conventional hydraulic system, and saves power and energy by more than 50%;

3. Two-stage speed control of the movable plate, which can realize fast approaching speed, slow-closing speed, and fast return speed;

4. Mold customization and one-stop technical service support;

5. The equipment has passed the market test in batches. The advantages of the products: the corners of the composite material don’t turn whitish, and the layer is not separated.

6. The double-cylinder high-pressure bulge forming machine uses configuration software to compile. It has a friendly HMI enabled by a high-color touch screen, which greatly facilitates the user's visual input and use of production parameters and direct monitoring of on-site production process data including equipment status. The main cylinder pressure, heating time, template temperature, vacuum suction time, air pressurization pressure, pressure holding time, etc. can be directly input through the touch screen, and each running value is dynamically displayed, with a friendly and visual interface, simple and convenient operation;

7. The touch screen has an Ethernet interface, USB interface, data storage, and input/output functions;

8. The press-fitting data can automatically generate production reports, and the data can be exported for easy query;

9. Equipment I/O input and output signal monitoring function with signal input displayed in red and no signal input displayed in green, which is convenient for troubleshooting of the equipment;

10. The machine has a fault alarm function. When a fault occurs, the corresponding cause identification turns yellow, and the corresponding troubleshooting can be done quickly according to the fault information;

11. The operating table is equipped with photoelectric protection, which is safe and reliable

12. This equipment adopts a single-station design, which makes it more convenient to place in the workshop. 

Carbon fiber is made of natural fiber or man-made fiber processed or carbonized under certain conditions. If it is used to make composite materials, the carbon fiber has to undergo a series of surface treatments. Carbon fiber composite materials include carbon fiber/resin, carbon fiber/metal, carbon fiber/carbon, and other products. Among them, carbon fiber reinforced resin composite materials are most widely used in many industries and applications. The specific strength of glass fiber is similar to that of carbon fiber, but the specific stiffness is much lower. Obviously, carbon fiber/resin has superior performance than FRP. Carbon fiber composite materials are usually hot molded by the composite material hydraulic press. It can be one-time molded, with high efficiency and fast speed. The carbon fiber thermoforming machines are currently the ideal equipment for producing carbon fiber composite materials.

The 1000 ton carbon fiber thermoforming servo hydraulic press is equipped with a servo hydraulic system, which has the advantages of high efficiency, energy saving, and environmental protection. In addition, Shuntec can custom build the carbon fiber thermoforming press with required heated platen temperature, cramping movement speed, pressure cramping and burp cycle managing. The Shuntec compression molding press is highly customized manufacturing solutions specifically for molding SMC and BMC.

The 1000-ton carbon fiber hot forming hydraulic press with servo hydraulic system possess an obvious advantages over the conventional hydraulic press;

   1. The conventional carbon fiber thermoforming hydraulic press is designed for simpreciprocating motion; The servo hydraulic carbon fiber thermoforming press is designed with precision control. It pays more attention to dynamic performance, and it can be used in the application with complicated forming processes; 

   2. Friction force should be considered for servo cylinder. In the servo hydraulic system, it affects the dynamic response, control accuracy, stability, etc. of the system. In the design of the servo hydraulic cylinder, seals with low friction coefficient should be selected, and the moving surface should be more precise than the conventional ones. .

   3. Servo hydraulic cylinder is the actuator in the servo-hydraulic system or proportional system. It realizes the direction, position, speed or deformation of the object by applying controllable pushing, pulling, pressing, torsion and other forces to an object. In order to simplify the mechanism when designing the entire control system, the signal detection and feedback device servo valve or proportional valve, etc. are often directly installed on the servo hydraulic cylinder.

Carbon fiber composite material is an important reinforcement material in advanced composite materials. It is widely used in the field of defense industry. It is an indispensable strategic for advanced equipment such as military aircraft, unmanned aerial vehicles, military cabinets, rockets, missiles, satellites, ships, etc. The Shuntec four-column carbon fiber composite material thermoforming press and gib-guide frame type composite carbon fiber thermoforming press are two structures for customers to choose from.

1. The Importance Of Hydraulic Cylinder Sealing

The hydraulic cylinder uses hydraulic oil as the working medium to transfer movement through the change of the sealed volume, and transfer power through the pressure inside the oil. To establish the seal volume and build up the pressure, there must be a good enclosed space and avoid leakage.

Sealing is a mechanism that prevents the leakage of the working medium (internal leakage and external leakage) and prevents foreign objects (such as air, dust, and water, etc.) from entering hydraulic components and hydraulic systems. The sealing element plays a decisive role in the design, service life, and function of the hydraulic cylinder. Here are some factors to be considered in the design of a hydraulic cylinder seal. 

2. Factors To Be Considered In The Design Of Hydraulic Cylinder Seal

1)Work Temperature

When choosing a sealing ring, you should consider the temperature of the work environment in which the hydraulic cylinder will work. Low temperature will cause the sealing materials to harden and shrink, which will cause leakage. Whereas, if the temperature is too high, the sealing materials will be carbonized. Therefore, it is very important to choose the right sealing ring which can agree to the working temperature. 

2) Work Pressure

If the system pressure is too high and the hardness of the seal is too small, the seal material will be squeezed out of the metal groove. It will affect the sealing effect and probably cause leakage, which will cause environmental pollution and reduce work efficiency. And the applicable working pressure for different types of seals is also different. Therefore, we should choose the right sealing materials according to working pressure. 

3) Linear Velocity Of Hydraulic Cylinder

If the linear velocity of the hydraulic rod to stretch and withdraw is too high, it will cause heating up, dry grinding, and carbonization of the seal, which will cause leakage. Sometimes if it exceeds the usable linear velocity range of the seal, it may lead to premature wear and leakage of the seal.

4) The Stress Condition Of The Hydraulic Cylinder At Work

If the hydraulic cylinder rod is subject to lateral force, it is necessary to design a guide support seal ring to withstand the lateral force, otherwise, it will cause the hydraulic cylinder rod and the hydraulic cylinder end cover to touch and rub each other, which may create scratches and cause leakage. 

5) Type Of Hydraulic Cylinder Working Medium (Hydraulic Oil)

If the seal is not compatible with the working medium, the seal material and the medium will dissolve in each other, and the seal will be softened or dissolved. Therefore, we should choose sealing rings that are compatible with the working medium.

6) Dust In The Work Environment 

Heavy dust in the work environment may cause the seal to wear and cause leakage as a result. This is why we need to design a dust-proof seal to achieve leak-proof performance. 

When the dust is particularly serious, it is even necessary to consider adding a corrugated sleeve to the hydraulic cylinder rod.

Secondly, even the correct seal requires a reasonable structural design. If the size of the seal does not match the metal groove, it may cause leakage.

1. The static sealing surface which matches the outer edge of the oil seal and the cavity is deformed because the dimensional tolerance does not meet the standard specifications;

2. The material cracks due to the harsh working conditions, especially the cracks on the sealing edge of the oil seal;

3. As the working conditions are too harsh and the rubber elastomer is incompatible with the working medium, the hardness of the rubber increases, or the hardness of the elastomer is too high;

4. The sealing medium swells the rubber and reduces the hardness of the rubber, thereby causing premature aging and wear of the oil seal;

5. Corrosion from the shaft to the sealing lip area will leave a permanently hidden trouble of the sealing performance of the sealing system;

6. The lubricant fails and the system is in a dry-running state so that the sealing lip wears quickly;

7. Comprehensive aging of both rubber elastomer and sealing medium.

8. "Oil-carbon" dirt is formed at the sealing lip, which causes the sealing lip of the oil seal to be lifted, causing leakage of the sealing system.

9. The sealing lip of the oil seal no longer follows the vibration of the shaft surface and the beating of the shaft;

10. Contaminants are permanently embedded in the sealing edge from the inside and outside of the seal, causing premature wear of the shaft surface and the sealing lip;

11. Irregular assembly process causes damage to the contact surface of the shaft surface and premature wear of the sealing lip;

12. The sealing edge is damaged during storage, transportation, and assembly.

In Addition To The Above

We can analyze the causes of leakage according to the time course of oil seals being used, such as early-phrase damage and leakage at the beginning of use; premature damage and leakage after a short period of use; damage and leakage after a fairly long period of use in work; damage and leakage at the end of the designed service life. 

The Hydraulic Cylinder Is The Executive Element In The Hydraulic Transmission System. 

It is the energy conversion device that converts hydraulic energy into mechanical energy. The hydraulic motor makes continuous rotary motion, while the hydraulic cylinder makes reciprocating motion. The quality of the hydraulic cylinder is the key to the performance of the hydraulic system. Therefore, designers should consider as many factors as possible when designing hydraulic cylinders. 

Let’s Look At The Following Factors To Be Considered In The Design Of Hydraulic Cylinders

1) Ensure the reciprocating motion speed of the hydraulic cylinder and the amount of traction needed by the stroke.

2) Minimize the size of the hydraulic cylinder as much as possible to make the whole structure compact.

3) The piston rod is best to be pulled instead of being compressed to avoid bending deformation.

4) Ensure that each part has sufficient strength, rigidity, and durability.

5) Try to avoid lateral load on the hydraulic cylinder.

6) When the piston rod of the long-stroke hydraulic cylinder stretches out, sagging should be avoided.

7) Pay attention to eliminating the deflection between piston, piston rod, and guide rail.

8) According to working conditions and other specific conditions of the hydraulic cylinder, consider buffering, exhaust, and dust-prevention measures.

9) The design must include a sealing device to prevent leakage.

10) The hydraulic cylinder should not be restricted and bent due to temperature changes, especially long hydraulic cylinders.

11) When designing the structural elements of hydraulic cylinders, designers should adopt standard series sizes and try to choose frequently used standard parts.

12) Try to achieve low cost, easy manufacture, and convenient maintenance.

When Designing The Hydraulic Cylinders, Designers Should Also Consider What Materials To Be Used To Achieve Good Quality And Performance. 

Here we introduce some materials that are usually used in the cylinder block, piston, and piston rods

1) Cylinder body

Machine tools： mostly use high-strength cast iron (HT200); when the pressure exceeds 8MPa, use seamless steel pipes.

Construction machinery： mostly use 35# steel and 45# steel seamless steel pipes.

2) Piston

Integral pistons: mostly use 35# steel and 45# steel.

Assembled pistons: grey cast iron, wear-resistant cast iron, aluminum alloy, etc. are often used. For special needs, bronze, brass, and nylon wear-resistant sleeves can be installed on the outer surface of the steel piston billet.

3) Piston rod

Generally, 35# steel and 45# steel are used for the piston rods. Under some circumstances, the hydraulic cylinder is subject to large shock and vibration, then alloy materials such as 55# steel or 40Cr can be used.

Definition

Hydroforming method refers to the use of liquid water, oil, or viscous material in replacement of a rigid concave mold or convex mold as the force transmission medium so that the material is shaped by fitting the convex mold or concave mold under the pressure of the force transmission medium. It is a kind of flexible forming technology.

Types Of Hydroforming

According To Different Liquid Media Used, Hydroforming Is Divided Into Pressurized-Water Forming And Pressurized-Oil Forming. 

The medium used in pressurized-water forming is pure water or an emulsified liquid composed of water and a certain proportion of emulsified oil; the medium used in pressurized-oil forming is hydraulic transmission oil or engine oil.

According To Different Blanks Used, Hydroforming Is Divided Into Three Types: Tube Hydroforming, Sheet Hydroforming, And Shell Hydroforming.

Sheet and shell hydroforming uses lower forming pressure, whereas pipe hydroforming uses higher pressure, also known as internal high-pressure forming. The medium mostly used in sheet hydroforming is hydraulic oil, and the maximum forming pressure generally does not exceed 100MPa. The medium used in shell hydroforming is pure water, and the maximum forming pressure generally does not exceed 50MPa. The medium mostly used in pipe hydroforming/internal high-pressure forming is emulsified liquid, and the maximum forming pressure used in industrial production generally does not exceed 400MPa.

The Main Characteristics Of Modern Hydroforming Technology Which Began To Develop In The Mid-1980s Are Manifested In Two Aspects. 

Firstly, since the liquid medium can be used as a convex mold or a concave mold, only a concave mold or a convex mold is needed respectively, so the mold costs and processing time can be saved by 50%. What’s more, the liquid used as a convex mold can form many complex parts that cannot be formed by a rigid convex mold. Secondly, liquid as a force transmission medium has real-time controllability, the pressure can be accurately controlled according to the given curve through the hydraulic closed-loop servo system and the computer control system, which ensures that the process parameters are within the set values, and are variable and adjustable over time, which greatly improves the process flexibility. 

In order to make sure that you purchase the right 300-ton four-column hydraulic press which can reach your expectation of performance and effectiveness and which can be brought into full play in your routine manufacture, you should fully consider the following matters before you make your purchasing decision. 

1. Understand The Characteristics Of Different Four-Column Hydraulic Press Manufacturers

At present, there are more and more manufacturers who can offer 300-ton four-column hydraulic presses. In order to exploit the machine’s advantages to the full in the production and processing industry, and make your specific needs satisfied, it is necessary that you understand the characteristics of different brands and confirm whether their prices are reasonable.

The four-column hydraulic press is a kind of equipment that uses an oil pump to transport hydraulic oil for processing operations. It is applicable to the processing of metals, plastics, and rubber, etc., and the effect is fairly good. Some of the advantages of a four-column hydraulic press are as follows: 

First of all, it saves costs on mold use. Since a complete set of molds can satisfy the need for processing, costs on mold use can be reduced to a minimum. 

Secondly, it can reduce the need for subsequent processing. Nowadays hydraulic presses have been developed to such a high level that they can not only fulfill their own routine duty but further complete the processing of the material as well. Therefore, manufacturers can be saved part of the subsequent processing and reduce production costs. 

A four-column hydraulic press has a very stable performance. In actual application, it can reach high working efficiency and production accuracy. 

2. Determine Your Specific Product Requirements And Processing Technology

Since the four-column hydraulic press has many specifications and models, before you choose your manufacturer and model, you should determine your specific needs of product function. Consider your own application environment so that the machine you choose can serve your purpose to the best. Choose the right model according to your requirement of production technology, so that the production can be more professional. 

Shuntec is a custom 4-column hydraulic press machine manufacturer for years. We build every 4-column hydraulic press directly to your specifications and your unique application. Feel free to contact us when comes to a 4-column hydraulic press.

Use Purpose

Shuntec 200 ton four-column hydraulic press is a common machine model used in many industries. Usage includes forging, stamping, cold extrusion, straightening, die-cutting, aluminum sheet stretching, aluminum product die forming, and stainless steel product dies forming.

Structure

Shuntec 200-ton four-column hydraulic press is composed of an upper beam, a sliding block, a worktable, a four-post rod, the main cylinder, a hydraulic power system, and an electrical system. The upper beam, sliding block, and worktable are welded with high-quality steel plates, and the internal stress is eliminated by vibratory stress relief. The surfaces of all four columns are medium-frequency quenched and chrome-plated.

Features

1. Three-stage speed control of the movable beam: fast approaching speed, slow pressing speed, and fast return speed.

2, The main cylinder and the press cylinder have upper and lower limit protection, and the setting of the upper and lower limit positions is simple, convenient, and fast, either by the position limit switches or via HMI.

3. Safety protection methods to ensure safe operation.

4. Low energy consumption, high efficiency, novel styles.

Performance

1. The lower cylinder plunger is replaced with the structure of hard chromium-plated steel and wear-resistant ring to avoid the problem of plunger cracking.

2. The sealing ring of the lower cylinder adopts an imported combination ring, which can last for more than 15 years without replacement.

3. Columns and piston rods are all treated with intermediate-frequency heat treatment, and the surface is hard chrome-plated.

4. The material ejecting cylinder can be individually jog controlled.

5. The hydraulic system uses a cartridge valve. Cartridge valve has a large passage which has the advantages of large flow, high speed, low noise, and low heat. 

6. Electrical control is realized by a single-chip microcomputer. The advantage of this system is that it has a safe control voltage of 24V. There is no intermediate relay.

 6. The whole computer chip has high stability, long service life, and simple operation.

7.  A wide range of grating safety protection devices.

Feel free to contact us for more details about the Shuntec 200 ton four-column hydraulic press.

When The Servo-hydraulic Press Machine Is Working, If The Oil Temperature Rises Too Fast, It Will Cause A Series Of Adverse Effects For The Hydraulic System. 

The temperature-rising and heating of the hydraulic system is a kind of comprehensive failure, just like pollution. It is mainly measured by testing the oil temperature and some hydraulic components. Temperature-rise will seriously affect the operation of the hydraulic system in the following ways.

1. It will increase the leakage of the servo-hydraulic press machine, and the volumetric efficiency of the pump and the whole system will be significantly reduced.

2. It will cause thermal deformation of the machine, which not only makes the gap between the moving parts with different thermal expansion coefficients in the hydraulic components become smaller and thus causes the parts to get jammed and causes malfunction, but affects the accuracy of the hydraulic equipment as well, resulting in poor parts processing quality.

3. It will also deform the rubber seals of the servo-hydraulic machine, causing premature aging and failure and reducing the service life. 

It will not only invalidate the rubber seals but cause leakage as well, which will, in turn, cause further heat generation and temperature rise.

4. If the oil temperature of the servo-hydraulic press is too high, it will accelerate the process of oxidative deterioration of the oil, under which condition the pitch will be released, the service time of the hydraulic oil will be reduced. 

5. As the oil temperature of the servo-hydraulic machine rises, the air separation pressure decreases, and the dissolved air escapes from the pump, resulting in cavitation, which lowers the working performance of the hydraulic system.