Parameters are the basic technical data of the hydraulic press, determined according to the purpose and structural type of the press, reflecting the working capacity and characteristics of the hydraulic press, and basically determining the profile size and total weight of the press.

The basic technical data include:

1. Nominal pressure (nominal tonnage)
Nominal pressure refers to the maximum force that the hydraulic press can theoretically generate, numerically equal to the product of the working fluid pressure and the total working area of the working plunger, reflecting the main working capacity of the hydraulic press.

2. Maximum daylight (opening height) H
The maximum daylight H refers to the distance from the surface of the worktable to the lower surface of the movable crossbeam when the movable crossbeam stops at the upper limit position.

3. Maximum stroke S
The maximum stroke S refers to the maximum distance that the movable crossbeam can travel.

4. Worktable size (length x width)
The worktable size refers to the effective dimensions that can be utilized on the worktable surface.

5. Return force
The return force is achieved by the working area of the piston cylinder lower chamber or by a separately set return cylinder.

6. Movable crossbeam movement speed (slide speed)
It can be divided into working travel speed, idle travel speed, and return speed. The working travel speed is determined by the process requirements, while the idle travel speed and return speed can be slightly higher to improve productivity.

7. Allowable maximum eccentricity
The allowable maximum eccentricity refers to the maximum eccentric value that can be allowed when the workpiece deformation resistance approaches the nominal pressure.

8. Nominal pressure and stroke of the ejector

Some hydraulic presses are equipped with ejectors on the crossbeam, and their pressure and stroke can be determined according to the process requirements.

In the selection of hydraulic presses, it is necessary to consider both the process parameters and usage conditions, as well as the following issues:

1. Body form, rigidity, strength, and motion accuracy; single-arm type is the worst, frame type is the best, and column-beam type is in between, but in terms of ease of manipulation and reducing investment, it is the opposite;

2.  Maximum eccentricity, to avoid excessive eccentricity;

3.  Upward hydraulic presses should not be used for hot forming processes to prevent oil leakage from igniting and causing fires;

4.  Working pressure can be adjusted to meet the process requirements.

1.  Common hydraulic calculation formulas and unit conversions· XIRO (xiromachinery.com)

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