Four-column forging hydraulic machine

Abstract

The invention relates to a four-column forging hydraulic machine which is composed of columns, an upper beam, a middle beam, a lower beam, a working oil cylinder and a return cylinder. A column guiding structure is arranged between the middle beam and the columns. The four-column forging hydraulic machine is characterized in that the column guiding structure comprises four groups of guiding assemblies composed of guiding plates and wedge plates, the wedge plates are pressed and fixed in the middle beam through pressing plates, supporting plates are arranged close to the upper ends of the guiding plates, adjusting pads are arranged between the supporting plates and the pressing plates, the lower end of a piston rod of the working oil cylinder is provided with a cylindrical cavity, the cylindrical cavity is internally provided with a first spherical pad and a spherical column, a supporting sleeve is sleeved outside the spherical column, a support structure is arranged at the upper part of a raised part at the lower end of the supporting sleeve, an elastic pad is arranged between the supporting structure and the raised part, and the lower end of the supporting sleeve is internally provided with a second spherical pad. According to the structure, the columns and the guiding structure are in surface contact, so that the local stress is reduced, and the traction injury of the columns is avoided. In addition, the second spherical pad, the spherical column and the first spherical pad are rotated in a matching way, therefore, the deflection of the piston rod along the axis is avoided, and the traction injury and the damage of the working oil cylinder and the piston rod are reduced.

Description

technical field [0001] The invention relates to a hydraulic press, in particular to a four-column forging hydraulic press suitable for working conditions of partial load processing. Background technique [0002] The four-column hydraulic press in the prior art consists of four columns, an upper beam, a lower beam, a middle beam slidingly installed between the upper and lower beams, a working cylinder connecting the upper beam and the middle beam, and a return cylinder connecting the middle beam and the lower beam. A guide sleeve structure is provided between the middle beam and the column. In this kind of guide structure, under the working condition of partial load, the inner wall of the guide sleeve and the column are in line contact, and the contact surface is small, so the local force is relatively large, which may easily cause the column to be strained. On the other hand, the guide structure cannot be adjusted after installation, so it cannot compensate for the deformat...

AI Technical Summary

Problems solved by technology

With this type of connection, when the hydraulic machine is used for eccentric load processing conditions, the plunger rod will deflect in the axial direction, so that the plunger rod will form partial contact with the inner wall of the cylinder, which will easily cause damage to the cylinder body and the plunger rod

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