Composite oil cylinder and hydraulic machine with double action function with composite oil cylinder

Abstract

The invention belongs to the technical field of plate liquid filling forming, in particular to a composite oil cylinder and a hydraulic machine with a double action function with a composite oil cylinder. The composite oil cylinder comprises a one-level oil cylinder system and a two-level oil cylinder system. The two oil cylinder systems can be operated independently and are not disturbed with each other. The one-level oil cylinder system is a closed fluid mechanics structural system which is capable of transmitting loading, namely, an annular oil cylinder system. The two-level oil cylinder system is a closed fluid mechanics structural system which is capable of transmitting loading, namely, a traditional telescopic plunger type oil cylinder. A two-level cylinder body is locked tightly with a one-level cylinder body through locking nuts, thus two oil cylinder systems are formed. The two oil cylinder systems are free of relative movement and are not disturbed with each other. The two-level oil cylinder system is arranged in the inner portion of the one-level oil cylinder system. The composite oil cylinder is from outside to inside in sequence the one-level cylinder body, a one-level cylinder piston rod, the two-level cylinder body and a two-level cylinder piston rod. By means of the composite oil cylinder and the hydraulic machine with the double action function with the composite oil cylinder, the one-level oil cylinder system and the two-level oil cylinder are integrated into a whole. A walking beam is reduced and a complete machine structure is simplified. The composite oil cylinder and the hydraulic machine with the double action function with the composite oil cylinder are beneficial to reducing cost.

Description

technical field [0001] The invention belongs to the technical field of liquid-filled forming of plates, and in particular relates to a composite oil cylinder and a hydraulic press with double-acting functions with the composite oil cylinder. Background technique [0002] Hydroforming is a plastic processing technology that uses liquid pressure to form workpieces. According to the different materials used, it can be divided into three types: sheet metal hydroforming, shell hydroforming and tube blank hydroforming. The actual application of hydroforming technology in production began in the 1990s in developed countries abroad. In my country, Harbin Institute of Technology began to conduct special research in 1999, and the actual application in industrial production only began in recent years. In the hydraulic press industry, it is customary to call sheet metal hydraulic forming hydraulic presses liquid-filled hydraulic presses, shell hydraulic forming hydraulic presses water e...

AI Technical Summary

Problems solved by technology

In addition to blankholder and stretching slider, the machine also needs stretching beam and blankholder beam. The structure of the machine is complicated, and the relative position accuracy between blankholder and drawing die is difficult to guarantee, so that the processed parts Dimensional accuracy is poor

[0006] The existing liquid-filled forming hydraulic press with an improved structure realizes the coaxial linkage of stretching and edge pressing, but it is realized through a structure called a two-stage telescopic composite cylinder, and the two-stage piston rods of the two-stage telescopic composite cylinder are respectively It is used as stretching and blanking function, so that the pressure tonnage between the stretching hydraulic system and the blanking hydraulic system affects each other, making it difficult to control the stretching or blanking pressure. Although stretching and blanking can be realized at one time, but , increasing the tonnage and cost of hydraulic machinery

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