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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.

Friction press is a kind of omnipotent pressure processing machine, which is widely used in various industries of pressure processing.In the mechanical manufacturing industry, the friction press is more widely used, can be used to complete die forging, upsetting, bending, correction, precision pressing and other work, some non-flash forging is also used to complete this press.
Friction press is a kind of screw press with friction drive, also known as double disk friction press, metal forging workshop press production group it USES the flywheel and friction disk contact transmission, and with the relative movement of screw and nut principle and work.Because it is in the use of more than ten thousand energy, and has the advantages of simple structure, installation, control and auxiliary equipment and low price, so in the machinery manufacturing, automobile, tractor and aviation industry stamping workshop, forging workshop and die forging workshop are widely used, can also be blanking.Friction press is a building materials machinery, widely used in ceramic tile, ceramic tile, refractory products dry press molding production.