Control device and method of isostatic pressing machine

Abstract

The invention discloses a control device of an isostatic pressing machine. The control device comprises a pressure sensor, an analog-to-digital converter, a controller, an electromagnetic valve, a driver, a hydraulic pump and an oil return electromagnetic valve; the controller is used for receiving a digital signal from the analog-to-digital converter, comparing the digital signal with a default pressure value, judging whether to continuously input pressure oil to a high-pressure oil chamber of the isostatic pressing machine or not, and controlling shutdown of the electromagnetic valve to maintain the pressure of the hydraulic oil in the high-pressure oil chamber; the electromagnetic valve is used for receiving a control signal from the controller, and starting or shutting down the high-pressure oil chamber of the isostatic pressing machine; the driver is used for amplifying the signal output by the controller; and the oil return electromagnetic valve is used for receiving a signal from the controller and returning the hydraulic oil in the high-pressure oil chamber to an oil tank after being started. After the automation control is carried out on the static pressure of workpieces by the control device disclosed by the invention, both the effects of low production efficiency and workpiece pressing are improved.

Description

technical field [0001] The invention relates to the technical field of extrusion, in particular to a control device and a control method for a static isopress. Background technique [0002] The isostatic press is to place the billet in the liquid medium of the high-pressure chamber of the machine, so that the surrounding and upper and lower parts of the workpiece are subjected to the static pressure of the ultra-high pressure liquid medium, so that the density is uniform and the structure is dense. Existing isostatic presses usually include a frame and a high-pressure chamber located in the frame, and the loading and unloading of materials is carried out between the upper and lower beams of the frame. If the isostatic press can press longer workpieces, the high pressure In addition to increasing the depth of the cavity, the frame must also be made very high to realize the loading and unloading of the workpiece, which not only makes the whole machine bulky, but also increases...

AI Technical Summary

Problems solved by technology

Although the isostatic presses of the above two structures can press large-length workpieces, the loading and unloading of the workpieces needs to be lifted manually or by an electric hoist, which is inconvenient for loading and unloading the workpieces, with low production efficiency and high labor intensity. The structure of the static press is complex

Both of the above two static presses use ultra-high pressure oil pumps to directly pressurize the high-pressure chamber. The disadvantage is that the hydraulic system is easily polluted, and the medium in the high-pressure chamber must use expensive transformer oil. The high-pressure pump is expensive and maintains. The control methods are also relatively backward, resulting in low production efficiency and poor effect of workpiece suppression

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