Hydraulic machine classification

Hydraulic machine classification

●Classification by purpose:

1. Manual hydraulic press: generally a small hydraulic press for pressing, press-fitting and other processes.

2. Forging hydraulic press: for free forging, ingot casting and colored and ferrous forging.

3. Press hydraulic press: used for stamping all kinds of plates.

4. Calibrated hydraulic press: for part shape and assembly.

5. Layer hydraulic press: used for pressing of plywood, particle board, fiberboard and insulation board. The stroke is large, the number of layers is large, the distance between the layers is large, and more plates can be suppressed.

6. Extrusion hydraulic press: used to extrude wire, pipe, bar and profile of various non-ferrous metals and ferrous metals.

7. Pressing hydraulic press: used for powder metallurgy and plastic product molding.

8. Packing and pressing hydraulic press: used to press metal chips into blocks and packing.

●Sort by action mode:

1. Upper pressure hydraulic press: The working cylinder of this type of hydraulic press is installed on the upper part of the fuselage, which is easy to operate, easy to achieve rapid down, and the most widely used.

2. Press-down hydraulic press: The working cylinder of this type of hydraulic press is installed in the lower part of the fuselage, the position of the center of gravity is low, the stability is good, and the product can avoid oil leakage.

3. Double-acting hydraulic press: The upper movable beam is divided into inner and outer slides, which are respectively driven by different hydraulic cylinders, and the pressure is the sum of the inner and outer slide pressures. Flexible working style, suitable for stretch forming of sheet metal, widely used in automobile manufacturing.

4. Special hydraulic presses: such as angle hydraulic presses, horizontal hydraulic presses, etc.

●Classified by fuselage structure:

1. Column hydraulic machine: The link between the upper beam and the lower beam of the hydraulic machine adopts a column and is locked by a locking nut. The hydraulic press with large pressure is mostly the column structure, the machine has good stability and the lighting is good.

2. Integral frame hydraulic machine: The fuselage is welded by casting or section steel. It is generally a hollow box structure with good bending resistance. The column part is made into a rectangular section, which is convenient for installing the plane adjustable guiding device. The moving beam has high precision and is widely used in plastic products and powder metallurgy and sheet metal press hydraulic presses.

●Classified by transmission form:

1. Pump direct drive hydraulic machine: each press night machine is equipped with a high-pressure pump separately, small and medium-sized press night machine is mostly this type of transmission.

2. Pump accumulator transmission hydraulic machine: high-pressure liquid adopts centralized supply method, which can save money and improve the utilization rate of hydraulic equipment, but requires high-pressure accumulator and a central pressure supply system to balance low load and peak load when high voltage The need for liquids. It is more feasible to use the hydraulic press on the counter earlier.

●Classified by manipulation:

1. Manual hydraulic press.

2. Semi-automatic hydraulic press.

3. Automatic hydraulic press.