A hydraulic press with cushioning and slider weight balance

Abstract

The invention relates to a hydraulic machine with buffering and sliding block weight balancing functions. The hydraulic machine comprises a left stand column, a right stand column and an upper transverse beam, wherein a plunger cylinder is installed in the center of the upper transverse beam; main cylinders are installed on the left side and the right side of the plunger cylinder; the lower ends of pistons of the main cylinders and the lower end of a piston of the plunger cylinder are connected with a sliding block; compound oil cylinders are symmetrically installed at the left end and the right end of the upper transverse beam; the upper end of a cylinder body of each compound oil cylinder is open; a compound oil cylinder piston is arranged in an inner cavity of the cylinder body of each compound oil cylinder; a downwards-extending compound oil cylinder piston rod is connected to the center of each compound oil cylinder piston, the lower end of each compound oil cylinder piston rod extends out from the center of a corresponding compound oil cylinder bottom cover, and the lower tip of each compound oil cylinder piston rod is rotationally connected with a compound oil cylinder buffer block; buffer stop blocks which extend outwards are symmetrically connected to the left side and the right side of the sliding block; and the buffer stop blocks are installed on the lower portions of the compound oil cylinder piston rods in a sleeving mode and located above the compound oil cylinder buffer blocks. The compound oil cylinders of the hydraulic machine can achieve the buffering function and can also participate in the quick return operation of the sliding block when the buffering function is not needed.

Description

technical field [0001] The invention relates to a hydraulic machine, in particular to a hydraulic machine equipped with a buffer and a slide block weight balance, and belongs to the technical field of hydraulic machine tools. Background technique [0002] When the hydraulic press is performing blanking, punching, edge trimming and other processes, due to material fracture, the deformation resistance suddenly decreases, which often causes considerable shock and vibration, and even causes damage to the machine parts. During the trimming process, as the slider goes down, the trimming punch starts to contact the workpiece. If the slider continues to descend, the workpiece and the burr will move and shear relative to each other until the material breaks. It rises sharply in the stroke, and when the stroke is equal to 2 / 3 of the thickness of the burr, the trimming force reaches the maximum value, and then drops sharply until it reaches zero. In order to prevent the hydraulic pres...

AI Technical Summary

Problems solved by technology

The disadvantages are: 1. In order to achieve fast return, improve efficiency and reduce return force, the mold used by the machine tool has limitations; 2. Regardless of whether the buffer function is used, the buffer piston rod moves with the slider, and part of the return is lost 3. The space of the upper beam is limited, which makes the layout difficult; 4. Energy storage and servo pump control technology are not used, resulting in waste of energy

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