Calculation of the Main Window Size of Six-head Hydraulic Press
When designing the main body of a six-faced hydraulic press, determining the structural dimensions involves more than just calculating the mechanical strength of individual components. It also requires evaluating the internal space formed by the articulation of the six groups of hinged beams—this is often referred to as the "window" size. Accurate calculation of this window size is essential for ensuring proper functionality and ease of maintenance.
The window size must be large enough to allow for the easy installation and removal of large accessories such as pads and jackets. A well-designed window not only contributes to a more compact structure but also enhances the rigidity and stability of the entire system. This balance between practicality and structural integrity is crucial in the design process.
There are two common configurations for the main window in a six-head hydraulic press. The window size can be calculated using specific formulas, which have been proven to be efficient, accurate, and widely applicable in real-world applications.
1. The size of the window formed by the adjacent three hinged beam tabs.
AB = (LB)√2/2 - RD1 = AB / cos30°
In this formula:
- AB: Edge length of the equilateral triangle
- D1: Diameter of the circumscribed circle
- L: Center distance between hinge pieces
- B: Total thickness of the hinge beam triple head set
- R: Radius of the hinge beam ear
This concept is illustrated in Figure 1.
Figure 1
2. The dimensions of the windows formed by the arcuate end faces of the adjacent three groups of hinge beam components (such as cylinders, guide sleeves, pistons, etc.).
CD = (√2 × l - φ) / 2
D2 = CD / cos30°
In this formula:
- CD: Edge length of the equilateral triangle
- D2: Diameter of the circumscribed circle
- l: Distance between opposing circular arc end faces of the machine
- φ: Total thickness of the hinged lugs
This concept is shown in Figure 2.
Figure 2
It has been proven through practical application that it is a sound design approach to ensure the diameter of the smallest circumscribed circle around the equilateral triangle formed by the window is at least 300 mm. This ensures sufficient clearance and functional efficiency in the overall design of the hydraulic press.
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