What are the main components of the three-beam four-column hydraulic press?

1. Column:
The column is the main supporting part and the main force-bearing part of the four-column hydraulic machine frame, and it is also the guide of the movable beam. Therefore, the column has high strength, rigidity and precision requirements. Factors such as the material used for the column, the structural size, the manufacturing quality, its connection with the beam, and the degree of preload all have a great influence on the working performance and even the service life of the hydraulic press. Columns are usually made of the following materials: 35 steel, 45 steel, 40Cr, 20MnV, 20MnSiMo, etc.
2. Beam:
The beam includes the upper beam, the lower beam (or the base) and the movable beam (or the slider), which is an important part of the four-column hydraulic press. Due to the large profile size of the beam, in order to save metal and reduce weight, it is generally made into a hollow box-shaped structure, with ribs added in the middle, and the ribs are denser in places with large loads to improve rigidity and reduce local stress. According to the square or radial distribution, the places where various cylinders, plungers (or pistons) and columns are installed are made into cylinders, so that the rigidity of the circular support surface is as consistent as possible, and the ribs and the outer wall are connected with each other. connected between.
There are two types of beams: casting structure and welding structure. The beams of medium and small four-column hydraulic presses with large production volumes are mostly iron castings (mostly HT200) or steel castings (mostly ZG275-500); in recent years, welding structures have been adopted. Increasingly, the material is generally Q235 or 16Mn steel plate. Most of the beams of medium and small hydraulic machines are integral structures, while the beams of large hydraulic machines are often designed in a combined form due to the limitation of manufacturing and transportation capabilities, and are connected by keys and tension bolts.
3. Relevant calculations for activity measurement:
The height of the movable beam of the four-column hydraulic press is generally (0.3 to 0.5) times the span of the box. Here, the height of the movable beam is taken as mmh450, the wall thickness of the cast box of the movable beam is taken as a40mm, and the thickness of the rib is b40mm.