Hydraulic system of metal plastic extrusion forging equipment

Abstract

The invention discloses a hydraulic system of metal plasticity swaging forming equipment. The hydraulic system comprises a pressure oil source, an oil pressure pressurizing element, an executing element and a low-pressure energy accumulator. The pressure oil source is connected with the oil pressure pressurizing element through a working oil way. The oil pressure pressurizing element is connected with the executing element which is connected with a first unloading valve group for carrying out unloading when oil pressure reaches a set value. An oil discharging opening of the first unloading valve group is communicated with the low-pressure energy accumulator, and hydraulic oil is discharged into the low-pressure energy accumulator. The hydraulic system has the advantages of being high in energy using rate, stable and reliable in working and low in production cost, energy is saved, and environment is protected.

Description

technical field [0001] The invention relates to a hydraulic system, in particular to a hydraulic system of metal plastic extrusion forging equipment. Background technique [0002] Metal extrusion and forging technology is a method of pressure processing using the principle of metal plastic forming. The pretreated metal blank is put into the mold, and then pressure is applied to the metal blank to deform the metal blank and fill the mold cavity, thereby Get the parts you need. Metal extrusion and forging technology is an advanced technology with less cutting or no cutting, which is beneficial to improve the quality of products, improve the internal microstructure and performance of products, and also has the advantages of material saving, low energy consumption, wide application range and production flexibility. Large size, simple process flow and low investment in equipment. [0003] At present, there are still many technical bottlenecks in the application of extrusion for...

AI Technical Summary

Problems solved by technology

In order to meet the requirements of extrusion forging force, the pressure of the hydraulic system in extrusion forging equipment can reach tens or even hundreds of megapascals. Therefore, the hydraulic system of extrusion forging equipment generally has the following problems: 1. The energy supply requirements of the hydraulic system are high, The performance requirements of the equipment are high, and the investment in the equipment is also large; 2. In order to complete the process from feeding to extrusion and forging to discharging, the system needs to be depressurized. The current practice is to directly discharge the pressure oil of the system into the mailbox , causing a lot of energy waste; 3. Since the working pressure of the system has reached tens or even hundreds of MPa, this will inevitably increase the loss of hydraulic components and their performance requirements, and the requirements for the reliability of hydraulic components are also high. However, there are not many hydraulic components to choose from in existing extrusion forging equipment, especially for system pressure relief. When the existing unloading valve is used in extrusion forging equipment, it cannot completely avoid the occurrence of pressure. If the pressure is high, it is very likely to cause damage to the hydraulic components, and the high-pressure oil spray is likely to cause casualties, posing a major safety hazard.

Moreover, in the existing extrusion and forging equipment, the combined valve group is used for pressure relief, which has problems such as complex structure, difficult control, insensitive action, and prone to failure.

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