The difference between hydraulic press and mechanical punch

The press (including punching press and hydraulic press) is a versatile press with exquisite structure. With a wide range of uses, high production efficiency, the press can be widely used in cutting, punching, blanking, bending, riveting and forming processes. By applying strong pressure to the metal billet, the metal is plastic deformed and fractured to process into parts.

Hydraulic press is a kind of liquid as the working medium, according to the principle of PASCAL made for the transfer of energy to achieve various processes of the machine. Hydraulic press is generally composed of three parts: the machine (main engine), power system and hydraulic control system. Hydraulic press will be used in many processing processes, compared with mechanical punches, the two have their own advantages, what are the differences between them?

1, the hydraulic press and the punching machine can be universal in the nature of work, but in view of their efficiency, working pressure is different, the gap between the upper and lower die has a certain difference, they can not use the same mold to work on different machine tools. Mechanical punching machine speed is fast, high efficiency, hydraulic press speed is slow, low efficiency, in the use of the machine should consider the most cost-effective way.

2. In terms of structure, the punching machine is a crank slider structure, which is driven by machinery, while the hydraulic press is driven by hydraulic pressure.

3. The hydraulic press has functions such as punching and drawing, which can achieve stamping, but the efficiency is low. Mechanical punch to complete a single stamping function, high efficiency, hydraulic press is generally used to process tensile parts, and extrusion products, for stamping slow forming die. The mechanical punch is used to punch the easily formed high-speed stamping die.

4. The press is a rigid mechanism, no speed regulation function, the hydraulic press can be stepless speed regulation, the pressure can be adjusted, if the degree of material deformation is very large, in the case of large tensile force, the press because of the inertia force fast pressing speed may lead to product cracking, hydraulic press is static pressure can be slow down, large tensile optional hydraulic press.

Mechanical press, with a large impact force, more suitable for blanking, cutting and other separation processes. Hydraulic press, the loading is relatively stable, suitable for bending, drawing, shaping and other forming processes. The above is the view of most people, but the Japanese research results show that the deformation of stamping parts is basically unrelated to the stamping speed, and only when the punching machine reaches more than 2000 times per minute. From the perspective of efficiency, the mechanical pressure machine is higher. From the reliability consideration, the mechanical press is more leather, and the hydraulic press is generally prone to oil leakage and other hydraulic problems.

In summary, in addition to shaping, correcting bending and other processes, it is best to use a mechanical press, which is convenient to improve work efficiency.