Rapid press hydraulic press hydraulic system

Abstract

The invention relates to a hydraulic system of a fast pressing hydraulic press. It includes the main oil cylinder, fast cylinder, servo motor pump unit, accumulator, the lower end of the main oil cylinder is connected to the middle upper end of the slider, the upper ends of both sides of the slider are respectively equipped with fast cylinders, the upper end of the main oil cylinder is connected to the lower pressure oil inlet pipeline, and the upper end of the quick cylinder Connect the quick-down oil circuit, the lower end of the quick cylinder is connected to the return oil circuit, and the quick-down oil circuit is connected with the lower pressure oil inlet pipeline. There is a lower end of the reversing valve, the upper end of the reversing valve is connected to the down pressure oil inlet pipeline and the return oil pipeline, the accumulator is connected to the outlet port of the servo motor pump unit through the auxiliary pipeline, a proportional valve is installed on the auxiliary pipeline, and the auxiliary pipeline passes through the control pipe The line is connected to the filling valve, and the first solenoid valve is installed on the control line. The advantages are fast pressing, no excessive installed power, high control precision, flexible start-stop and pressure relief control functions, and rapid operation speed of the slider.

Description

technical field [0001] The invention relates to the field of hydraulic systems of hydraulic presses, in particular to a hydraulic system of rapid pressing hydraulic presses. Background technique [0002] At present, the hydraulic press uses a motor to drive the oil pump to press at a slow speed. For the press that needs to press fast, it needs to be equipped with a high installed power. This kind of press with a similar process often only uses the maximum power during the pressing to the final mold clamping stage. Therefore, Device power efficiency is low. Ordinary compressors still use ordinary three-phase asynchronous motors as power sources. Although this motor works stably and has a long life, its efficiency is low and it also loses power during empty cycles, so it does not meet the current requirements for energy saving and emission reduction. Therefore, the use of servo motor drive will be a major trend at present. Ordinary press systems are mostly controlled by swit...

AI Technical Summary

Problems solved by technology

Ordinary compressors still use ordinary three-phase asynchronous motors as power sources. Although this motor works stably and has a long life, its efficiency is low and it also loses power during empty cycles, so it does not meet the current requirements for energy saving and emission reduction. Therefore, the use of servo motor drive will be a major trend at present

Ordinary press systems are mostly controlled by switches, and there are large response delays and switching shocks. Using servo motors to drive oil pumps does not have the above two problems.

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