Lower pushing air cushion device with hydraulic buffering function for multi-station dual-point press

Abstract

The invention relates to a lower pushing air cushion device with a hydraulic buffering function for a multi-station dual-point press. The lower pushing air cushion device comprises a cylinder barrel and multiple pistons arranged in the cylinder barrel; the upper and lower ends of each piston are respectively provided with a piston plate to form a cylinder capable of moving up and down; all pistons are connected to a piston rod in the cylinder barrel; the piston plate at the uppermost end is connected with an upper pushing rod penetrating out from a pushing plate; the cylinder barrel is provided with an air pipe communicated with each cylinder; all communicating positions are positioned at the lower ends of the cylinders; the lower end of the cylinder barrel is provided with a hydraulic oil cylinder. The lower pushing air cushion device with the hydraulic buffering function for the multi-station dual-point press has the advantages that, 1, a multi-layer structural mode is arranged, a multi-piston structural mode is adopted, the lower pushing air cushion device has the advantage of providing a larger pushing force compared with the traditional single-layer structural mode, the provided pushing force can be adjusted by the air inlet pressure of the air inlet pipe, and the flexibility is strong; 2, the hydraulic oil cylinder is arranged and provides a downward force which is smaller than the pushing force, thus achieving a buffering action, avoiding the impact force during pushing, enabling the pushing action to be smooth and slow and effectively protecting a machining workpiece.

Description

technical field [0001] The invention relates to a lower ejector air cushion device with a hydraulic buffer function for a multi-station double-point press, belonging to the technical field of presses. Background technique [0002] According to the requirements of the mold process, the multi-station double-point press generally needs to be equipped with a lower ejector air cushion at each station; the existing structural form drives the upper ejector rod to eject material through the air inlet, and is generally in the form of a single piston. When a large ejecting force is required, it often cannot meet the use requirements; at the same time, during the ejecting process, there is no opposite damping force, and sometimes the workpiece is subjected to a large impact force instantaneously, which is prone to damage. Contents of the invention [0003] In view of the above defects, the present invention aims to provide a lower ejector air cushion device with hydraulic buffer func...

AI Technical Summary

Problems solved by technology

[0002] According to the requirements of the mold process, the multi-station double-point press generally needs to be equipped with a lower ejector air cushion at each station; the existing structural form drives the upper ejector rod to eject material through the air inlet, and is generally in the form of a single piston. When a large ejecting force is required, it often cannot meet the use requirements; at the same time, during the ejecting process, there is no opposite damping force, and sometimes the workpiece is subjected to a large impact force in an instant, which is prone to damage

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