The four-column hydraulic press is a kind of mechanical equipment that uses the static pressure of hydraulic oil delivered by an oil pump to process metal, plastic, rubber, wood, powder, and other products

The design of the oil filter is mainly to select the filter element material according to the working pressure and filtration accuracy requirements of the four-column hydraulic press, and calculate the filter surface according to the selected filter element material and flow requirements.

1. Solution: How to remove the impurities in the hydraulic oil of the four-column hydraulic machine

In the four-column hydraulic machine, to ensure the cleanliness of the oil, it is necessary to install an oil filter to filter out impurities in the oil. The impurities in the oil are dust, dirt, components in the hydraulic machine device, and oil pipes. Residues and fractions in oil, etc. So, we should choose a filter element with strong hydraulic resistance.

The operating capacity of the four-column hydraulic press oil filter depends on the content of solid particles in the oil, the pressure difference of the oil before and after filtration, the viscosity and temperature of the oil, and the performance of the filter medium itself. The lower the speed of oil circulation through the filter element, the lower the pressure on the surface, and the higher the filtration accuracy. These impurities will scratch, wear and even get stuck on the surface of the internal parts of the hydraulic press, block the small holes of the pipeline and the throttle valve port, affect the working ability of the hydraulic press, and finally cause the four-column hydraulic press to fail to work normally.

2. Selection of hydraulic oil

Hydraulic oil is the medium to ensure the normal operation of the four-column hydraulic machine. The cleanliness of the hydraulic oil is also an important guarantee to reduce the pollution inside the hydraulic machine. important. The greater the pressure applied to the surface of the filter and the smaller the resistance, the greater the oil output capacity of the filter.

The Shuntec 500-ton servo hydraulic press adopts the servo drive and servo motor, which has the characteristics of low noise and low energy consumption. The servo motor and electric control circuit are integrated into the power cabinet, which is highly independent and easy to repair and maintain. It can be processed and customized according to customer requirements, such as the size of the hydraulic machine working table, cylinder stroke, daylight opening, working pressure, operating speed, automatic loading, and unloading, automatic/semi-automatic, etc. Shuntec provides tailor-made high-quality hydraulic press equipment to meet customer production process needs.

The pressure and speed of the Shuntec 500-ton servo hydraulic press can be programmed and controlled to meet various technological needs, and remote automatic control can also be realized. The pressure, speed, and position of the equipment are fully closed-loop digital control, with a high degree of automation and good precision. It is an energy-saving and high-efficiency hydraulic machine that uses a servo motor to drive the main transmission oil pump, reduces the control valve circuit, and controls the slider of the hydraulic machine. It is suitable for stamping, die forging, pressing, straightening, and other processes.

Comparative advantages of the Shuntec 500-ton servo hydraulic press against the traditional hydraulic press:

1. Energy saving: the Shuntec 500-ton servo hydraulic press can save electricity by 30%~70% compared with a traditional hydraulic press.

2. Low noise: The noise of a 500-ton servo hydraulic press is generally less than 70dB, while the noise of a traditional hydraulic press is 83dB~90dB.

3. High efficiency: The speed of the 500-ton servo hydraulic press can be greatly increased, and the working cycle is several times higher than that of the traditional hydraulic press, which can reach 10/min~15/min.

4. Convenient maintenance: the cleanliness requirement of hydraulic oil is far less than that of a hydraulic proportional servo system, which reduces the impact of hydraulic oil pollution on the system.

5. Less heat and lower cost: the hydraulic oil consumed by a 500-ton servo hydraulic press is generally only about 50% of that of a traditional hydraulic press.

6. The 500-ton servo hydraulic press has a high degree of automation, good flexibility, and high precision.

The following introduces the control components of the Shuntec 500-ton servo hydraulic press:

1. Proportional valve: Control the flow of the entire oil circuit in the hydraulic system, and adjust the opening size according to the set value to achieve the required pressure.

2. Reversing valve: The equipment has four reversing valves, which work respectively in ascending and descending, decelerating, working, and guiding actions.

3. Throttle valve: a throttle valve is installed under the deceleration valve and work inlet valve, which can control the flow of the oil circuit to slow down or speed up the speed of action.

4. Back pressure valve: A back pressure valve is installed under the ascending and descending reversing valve to stabilize the pressure of the oil circuit when the oil cylinder descends.

5. Filling valve: When the pilot valve is in action, the signal oil circuit of the filling valve pushes the check valve, which can make the check valve conduct in reverse so that the oil will return to the top auxiliary tank when it is rising. It has no effect when descending, it is only a one-way valve.

The 100-ton stretching machine is also called the deep drawing hydraulic press, which is divided into a four-column deep drawing hydraulic press and frame-type deep drawing hydraulic press from the fuselage structure; it can be also divided into single-action deep drawing hydraulic press and double-action deep drawing hydraulic machines. According to the different stretching workpieces, various forming methods such as hydraulic pad stretching, lower ejecting cylinder stretching, and die stretching are commonly used.

The 100-ton stretching machine is suitable for various stamping processes such as stretching, bending, forming, punching, blanking, and flanging of plates. It is used in the manufacture of various containers and large automobile covers, etc., and in the molding of non-metallic materials.

1. Equipped with oil cooling device and light curtain safety protection device;

2. Optional touchscreen display and PLC programmable control system;

3. Equipped with liquid filling device for quick approaching stroke.

The 100-ton stretching machine works as follows:

1. Jogging: Press the corresponding button to generate the corresponding action, and release it to stop the action.

2. Manual: Press the corresponding button to produce the corresponding action until the limit position.

3. Semi-automatic.

(1) Constant pressure control: the sliding beam descends rapidly → descends slowly → pressurizes to the upper limit of the electric contact pressure gauge, then delays holding pressure → relieves pressure → returns (stops afterward).

(2) Constant position control: the sliding beam descends rapidly → descends slowly → pressurizes. When the sliding beam touches the proximity switch, it sends a signal to start holding the pressure delay → unloading → return (stop after).

1. The oil tank of the three-beam four-column hydraulic press can be smaller than that of the traditional four-column hydraulic press, and the oil change time can be increased；

2. The three-beam four-column hydraulic press has high efficiency: through moderate acceleration and deceleration control and kinetic energy improvement, the machine speed can be further improved, and the rhythm of work can be improved several times;

3. The working pressure, speed, and position of the three-beam four-column hydraulic press are all controlled by a closed-loop control computer, with a high level of automation technology, good precision, and wide application fields;

4. High precision: the three-beam four-column hydraulic press is equipped with an infrared sensor safety grating to ensure that the repeat accuracy level can reach (+0.03mm) and the working pressure deviation (+1%);

5. The three-beam four-column hydraulic press has strong impact resistance and lateral pressure resistance, is stable, high-precision, and durable, and can be used for blanking, forming extrusion molding, and other processing techniques;

6. With the intelligent automatic control system of the three-beam and four-column hydraulic press, the temperature is not easy to rise rapidly, and the oil passage system software has no negative pressure, which greatly reduces common faults and increases the service life of the hydraulic system;

7. Due to the cancellation of the proportion in the hydraulic transmission system, the hydraulic solenoid valve, the variable speed control circuit, and the working pressure adjustment control circuit, the hydraulic transmission system is simplified and the harm to the environment and the system is reduced.

In some cases, the four-column hydraulic press is an automatic machine tool in the drawing process and forging process, and its performance and applicability are higher than other forging machine tools. So, what factors should users consider when purchasing a four-column hydraulic press? We should choose a four-column hydraulic press from the following aspects:

1. Quality

Only by taking quality as life can we create a first-class brand. Manufacturers must strive for survival through quality, strengthen production site management, and strictly control the quality of four-column hydraulic presses;

2. Brand

In the information age, in order to increase sales, four-column hydraulic press manufacturers must establish their own brands and then carry out brand promotion;

3. Reputation

Word-of-mouth communication mostly occurs between closely related groups such as friends and colleagues, and the effect of communication is much higher than other channels; if the manufacturer can provide lower prices, higher product quality, and higher brand communication power, it will be able to form a good reputation among users.

4. After-sales service

Different four-column hydraulic press manufacturers produce different hydraulic presses with different corresponding functions. A good after-sales service can not only solve the daily use process but also prolong the service life of the four-column hydraulic press.

Therefore, with the increase of hydraulic press manufacturers and fierce competition, the price of four-column hydraulic presses is no longer the main factor affecting customers' purchases. Nowadays, Customers pay more attention to performance, function, quality, brand, reputation, and after-sales service.

1. Loss of pressure along the way.

The pressure loss is caused by viscous friction when the two-column hydraulic machine oil flows in the equal-diameter straight pipe. The pressure will taper off and lose along the way.

2. Partial pressure loss.

When the hydraulic oil of the two-column hydraulic machine flows through the elbows, joints, gradual cross-sections, valve ports, and filter screens of the pipeline, the liquid flow will generate vortices and violent turbulence, resulting in pressure loss. 

3. The total pressure loss of the pipeline system.

The total pressure loss of the entire pipeline system shall be the sum of all pressure losses along the way and part of the pressure loss.

Reducing the flow rate, extending the length of the pipeline, reducing the sudden change of the pipeline section, and improving the processing quality of the inner wall can all improve the issue of pressure loss. The important factor affecting the pressure loss of the two-column hydraulic press is the flow rate of the liquid.

There are various types of four-column hydraulic presses with different rigidity, precision, and usage methods, so buyers are advised to make reasonable choices according to the nature of the production process, batches, mold conditions, and precision requirements.

1. Select a suitable model of a four-column hydraulic press according to your own needs

1). Before selecting, according to the shape and raw material you need to press, then ask yourself what is the output requirement and whether there are any special requirements for the four-column hydraulic press, and then let the manufacturer provide a suitable model.

2). When selecting a four-column hydraulic press, there must be a surplus of pressure, not only to improve the service life of the equipment but also for long-term development in the future. The nominal pressure must be greater than the actual working pressure.

3). The output of the four-column hydraulic press is not only related to the model but also related to the hydraulic system, and there should be a fast system.

4). The stroke of the four-column hydraulic press should meet the required size of the formed product, and the formed product can be easily taken out from the mold.

2. Select a right manufacturer

The quality of the four-column hydraulic press not only affects the service life but also affects the production efficiency. After determining the equipment model, you can also learn about the manufacturer's parameters, production scale, technical strength, etc.

① Whether the appearance design of the four-column hydraulic press is reasonable, whether the painting is uniform and smooth, and whether the appearance is smooth.

② Whether there is abnormal noise, or whether there is mechanical vibration; during the test run, it should test the effect of the machine pressure and whether the operation is flexible.

The three-beam four-column hydraulic press is widely used for the pressing and forming of various plastic materials, such as stamping, bending, flanging, stretching, forming, punching, and bending of thin plate parts. It can also be used for correction pressing and compression molding of plastic products and powder products.

1. The fuselage is a vertical structure with three beams and four columns. It is composed of the overall fuselage, main cylinder, travel limit switch equipment, lubrication equipment, hydraulic power unit, and circuit system. The overall fuselage is composed of upper beams, guide rails, etc. The slider, console, pole, pipe collar, guide column, etc., and the guide rail slider move in a straight line at a constant speed along the four columns under the push of the hydraulic cylinder.

2. The main column of the three-beam four-column hydraulic press is made of No. 45 round steel, which is not easy to rust. The sliding sleeve (guide column) is made of wear-resistant pig iron, embedded with polytetrafluoroethylene metal composite material to prevent the pole from being confused, and has excellent anti-corrosion properties. wheel load capacity.

3. The hydraulic cylinder of the three-beam four-column hydraulic press is a piston machine structure. The important sealing performance of the hydraulic cylinder adopts a sealing ring with good aging resistance and sealing performance, and the internal thread has good smoothness.

4. The hydraulic oil pipeline adopts cold-drawn seamless pipe, the pipeline layout is clear and neat, the bending radius of the air-conditioning pipe is standard, and the high-pressure and low-pressure pipes have a significant color difference, which is conducive to maintenance. The pipe diameter exceeds 25 diameters and adopts loose flanges. In order to reduce the oil leakage of the three-beam four-column hydraulic press.

The three-beam four-column hydraulic press itself can be used for the die-casting of many kinds of workpieces. As long as the mold is properly matched, the three-beam four-column hydraulic press can perform high-intensity operations throughout the process, helping companies obtain more output and increase corporate profits.

The hydraulic press can leak both internally and externally, mainly including gap leakage, multi-porosity leakage, adhesion leakage, and power leakage.

1. Gap leakage:

Gap leakage means that the liquid in the gap of the hydraulic system flows under the action of the pressure difference between the two ends, resulting in leakage. In hydraulic components, there are various forms of gaps.

2. Multi-porous leakage:

Various cover plates, flange joints, plate connections, and other components in the hydraulic press usually take fastening measures. When the joint surface has no unevenness error and is fastened under the ideal parallel state, there will be no gap between the joint surfaces. Overall gaps are formed. However, due to the effect of surface roughness, the two surfaces will touch at every point.

3. Adhesive leakage:

There is a certain adhesion between the viscous liquid and the solid surface. After the two contacts, a thin layer of liquid will adhere to the solid surface of the hydraulic system.

4. Power leakage:

On the sealing surface of the rotating shaft of the hydraulic system, if there are traces of spiral processing, such traces have the effect of "pumping oil". When the shaft rotates, the liquid flows along the groove of the spiral trace under the action of the rotating force of the shaft. The characteristics of power leakage are: the higher the rotational speed of the shaft, the greater the leakage.

During the manufacturing process of the hydraulic press, contamination control of the hydraulic press system should be carried out in the processes of processing, assembly, pipeline preparation, packaging, and shipping.

1. Contamination control of hydraulic oil

Refueling directly into the fuel tank without filtering conditions has caused contamination of the hydraulic press system.

2. Main points of quality control of integrated blocks

Clean up flashes, burrs, and iron filings in the channel of the integrated block, and remove them by grinding. In this process, a cold light source is generally required to observe the inside of the tunnel.

3. Pipeline contamination control

When welding hydraulic pipelines, especially high-pressure pipelines, argon arc welding should be used to ensure the welding quality and reduce the pollution of the internal welding impurities to the medium.

4. Contamination control of components such as filters

The selection of the material of the filter element should be highly valued. The low-quality filter material may not only cause rupture and failure but also cause hydraulic press system pollution due to the fiber of the filter material.

5. Demolition and protection of the hydraulic press system

After the hydraulic press system is manufactured, blockage protection during the dismantling process is particularly important. The sealing protection should fully consider the packaging and transportation conditions to ensure that the sealing is firm and prevents it from falling off.