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The working principle of the friction screw press is to use the contact transmission of the flywheel and the friction disk, and to work by the principle of relative movement of the screw and the nut. The press is usually driven by the motor through the friction disk to drive the flywheel rim to rotate the flywheel, so this type of press is also called a friction press. The largest friction press in China is 25 trillion Newton. Larger presses use a hydraulic system to drive the flywheel , Known as hydraulic screw press, the largest specification is 125 trillion N. Later, there was an electric press that directly drives the flywheel with a motor. It has a compact structure and fewer transmission links. Due to frequent commutation, it requires higher control electrical appliances, and requires a special motor.

There is no fixed bottom dead center of the rotary press, and the larger die forgings can be shaped multiple times, and can be singles, continuous and inching. The striking force is related to the amount of deformation of the workpiece. When the deformation is large, the striking force is small, and when the deformation is small (such as cold strike), the striking force is large. In these respects, it is similar to the forging hammer. However, its slider speed is low (about 0.5 meters/ Seconds, only 1/10 of the forging hammer), the impact force is closed by the frame, so the work is stable, the vibration is much smaller than the forging hammer, and no large foundation is required. The automatic heat press is equipped with a slip insurance mechanism to maximize the impact force Limit to less than twice the nominal pressure to protect the safety of the equipment.

The lower part of the press is equipped with a forging ejection device. The screw press has the function of various screw press forging machines such as die forging hammer and mechanical press. It has strong versatility and can be used for die forging, punching, drawing and other processes. In addition , Screw presses, especially friction presses are simple in structure and easy to manufacture, so they are widely used. The disadvantage of screw presses is lower productivity and mechanical efficiency.

Automatic friction press is a versatile pressure processing machine, which is widely used and can be used in various industries of pressure processing. Since its creation, friction presses have played an important role in industrial development. In order to regulate its operation, it is necessary to pay attention to follow the process:
1. Wear and wear protective equipment.
2. Observe the general safety technical operation regulations of shear punching machinery.
3. The mold closing height must be checked before installing the mold. The closing height can only be installed within the allowable range. Adjust the upper and lower strokes of the punch to keep it within the specified safety range.

4. When the device is put on the mold, it should be aligned with the hole of the mold handle, so as not to bite the edge of the hole when the slider falls. The area of ​​the template should not be too small to avoid crushing the upper die hole.
5. When using the top material, the length of the rods on both sides should be adjusted to be consistent, and must not be skewed.
6. The process of starting the equipment is to start the oil pump (or first open the compressed air valve) and then start the friction wheel motor. The opposite is true when stopping. The motor driving the friction wheel should be turned off before the oil pump (or compressed air valve) is turned off.
7. Pay attention to whether the oil pump pressure or compressed air pressure is normal when working.
8. No other work such as machine tool adjustment or mold installation is allowed while the flywheel is rotating.
9. After the work is completed, put the punch down smoothly and close the car in order.
The advantages of automatic press machine: it has the characteristics of simple structure, small size, short transmission chain, convenient operation, safe operation, and small maintenance workload. The press can accurately set the strike energy, the strike force is displayed, and can be based on the molding accuracy Adjust the energy and impact force to reduce the mechanical stress and thermal contact time of the mold and extend the life of the mold. Automatic friction screw presses have two transmission forms: one is the screw press transmitted through the first gear, the specifications are 0.4MN ～ 80MN, and the other is the direct drive electric screw press, the specifications are 0.16MN ～ 16MN . The press has good rigidity, high guiding precision of the slider, and strong anti-eccentric load capacity. It can be used for multi-station die forging and is a new type of energy-saving and environmentally friendly press.

Friction press is a screw press using friction drive method, also known as double-disk friction screw press. It is a versatile pressure processing machine with a wide range of applications and can be used in various industries of pressure processing. In the machinery manufacturing industry, the application of the press is more extensive, and can be used to complete the work of die forging, upsetting, bending, correction, precision pressing, etc., and some flashless forging is also completed by this press.

For the price of friction presses, this issue has attracted a lot of attention because bricks are a very important material in our construction industry. Any building we build will use bricks as the corresponding material. It is in this situation that the demand for bricks in the construction industry is very large. Correspondingly, more and more brick manufacturers are appearing. They will also choose presses to help themselves in the production of bricks, it is brick press machine.

The price of friction presses will also be affected according to different models and different sizes. The corresponding prices of different models or different sizes of presses will also be different. Different manufacturers require different equipment power, and the size of the equipment will be different. We choose equipment with larger specifications, and the corresponding price will be higher. After all, the cost of manual production and materials for large equipment will be relatively higher. Moreover, large equipment will take longer to produce, so the overall cost will be more expensive. The price of our press is very different from our model, and the overall price will also be very different, so we need to choose the press machine that suits our specifications and size according to our needs.

The price of friction presses will also be very different in different regions. The corresponding labor costs and material costs will also be different in different regions, which will have an impact on our overall equipment costs. Of course, different manufacturers in each region will have different overall processing and transportation costs, and the cost of the equipment itself will also fluctuate. Related Reading: Automatic friction press machine operation rules

Through the different factors above, we also know that the price of friction presses is affected by many different factors, and they will also be controlled by these different factors, and price fluctuations will definitely exist. Then when we choose to buy, we can compare several brands of different brands. While choosing good quality equipment, we must also ensure that the overall cost is reasonable, so that we can choose a satisfactory press.

Mechanical press is a forging machine driven by a crank link or toggle lever mechanism, cam mechanism, and screw mechanism. It is a machine tool for pressure processing of materials. It is processed by applying strong pressure on the blank to deform and break it. Components.

Compared with mechanical transmission, hydraulic transmission has many technical advantages such as large power-to-mass ratio, convenient stepless speed regulation and overload protection, and flexible and convenient layout.

So, What are the main advantages and disadvantages of mechanical and hydraulic presses?

1. The hydraulic press uses a hydraulic pump to generate power through the control circuit hydraulic actuator to transmit power. The liquid meson has water and emulsion; hydraulic oil. It is characterized by high working pressure, stable operation, free control of working stroke, large adjustment range, large working space, and moderate working efficiency. It can complete most of the work of mechanical press machine and has a wide range of applications. The configuration of the hydraulic press is more complicated. The larger presses are generally equipped with independent pumping stations, the control parts and circuits are more complicated, and the cost is relatively high.

2. From the perspective of the mold, the hydraulic press is suitable for large, complex and precise automotive sheet metal parts, especially with a “stretch” function. Suitable for large cover parts and door parts of automobiles. Its characteristics are relatively dense compared to mechanical presses, and the stability of product structure and size is better. Maintenance is more convenient than mechanical presses, because of the standardization of hydraulic parts, the maturity of the theory is very high. For example, to find faults, you can draw wings from a hydraulic schematic diagram. Just insist on using genuine hydraulic oil.

3.  The crank-arm press uses the crank arm to transmit force, which is characterized by fast running speed and high working efficiency, and the working stroke is fixed and cannot be adjusted. It is strictly forbidden to overload operation. Generally used for blanking, punching, stretch forming, etc.

The friction screw presses use the wheel to drive the friction wheel to transmit the force by the inertia rotating screw, which is characterized in that it is not restricted in the effective working area of ​​the screw, the transmission pressure is large, and the work efficiency is moderate. The operation is not easy to control. Generally used for material correction; simple molding; die-casting cavity molding. Shuangdong press is mainly used for stretch forming. It relies on the screw to transmit force directly.

Mechanical press 1. fast operation, high efficiency, low cost, simple control part, easy maintenance; 2. small work surface, generally equipped with counterweight wheels (flywheels) to increase its transmission power Noise and vibration.

Compared with mechanical transmission, hydraulic transmission has a large power / mass ratio, which is convenient for stepless speed regulation and overload protection, flexible and convenient layout and other technical advantages. Mechanical presses are fast, but their strength is not as large as hydraulic presses. Hydraulic presses are heavy but slow.

Electric screw press is a kind of forging and pressing equipment used for hot forging, precision forging and finishing. Electric screw press is often used in pressure welding process of stainless steel double bottom pot, and precision forging of titanium alloy blade and other blades.

Features of electric screw press:

1. The power control of the press is accurate and the stroke times are high.

2. Easy operation and maintenance, maintenance workload is small, save labor and maintenance costs.

3. Advanced electrical control technology and motor drive will not impact the power grid and affect the normal operation of other equipment.

4. According to the forging forming process, adjust the strike force and strike energy, forging forming precision is high, mold stress is small, mold service life is long.

5. No fixed lower dead point, no need to adjust the height of the mold, will not produce the phenomenon of stuffy car.

6. Compared with the hydraulic screw press, there is no need for complex hydraulic drive equipment, and there is no hydraulic oil leakage and pollution of the environment and hydraulic failure.

7. Compared with the friction screw press, frictionless disc, horizontal shaft and other intermediate transmission device and friction belt wearing parts, less parts, high reliability, good accuracy.

8. Simple structure, compact, short transmission chain, safe operation.

Then, what is the working cycle of the electric screw press?

Electric screw press can not only punch the workpiece, but also can be stamped. The different processing methods of the press have different requirements on the pressure of the system and the speed of the punch. The working process is also more complicated.  Recommended reading: solution to the use problems of electric screw presses

During the punching process, the punch falls and punches the workpiece at a relatively high speed, and rises and returns quickly. The stamping process requires the slider to fall at a faster speed. When the workpiece is encountered, the punch speed decreases and the system pressure increases to ensure the stamping of the steel plate is done. After the stamping is completed, the punch rises back to the initial position at a faster speed, and then completes the work cycle process.

Under different processing techniques and procedures, the pressure of the hydraulic system needs to be changed and adjusted frequently. In order to produce a larger punching pressure to meet the work requirements, the pressure requirements of the system are relatively high. The electric screw presses have a large difference in the running speed of the hydraulic punch during the empty stroke and the pressurization stroke, the oil flow in the hydraulic system is large, and the system power requirements are high. Therefore, the entire system is a high-pressure large-flow system, which is the stability and safety requirements are high.