A Synchronous Control System for Hydraulic Cylinders of Six-sided Top Press

Abstract

The invention discloses a synchronous control system for hydraulic cylinders of a six-sided top press, which includes a single-cylinder oil supply pipeline and a reciprocating supercharger corresponding to the working cylinders one by one. Directional valve, the oil inlet of the single-cylinder oil supply pipeline is equipped with a single-cylinder check valve, and the high-pressure plunger outlet ports of the six reciprocating boosters are connected in parallel to the outlet of the ultra-high pressure check valve, and the six reciprocating boosters The T port of the electromagnetic valve of the reciprocating booster is connected in parallel to the inlet of the ultra-high pressure hydraulic control check valve, and the oil discharged from the low-pressure piston of the reciprocating booster flows out of the T port of the solenoid valve of the reciprocating booster and then is pressed into the inlet of the ultra-high pressure hydraulic control check valve; The invention can guarantee the synchronous displacement control accuracy of six-cylinder equal-volume oil supply, so that the synchronous control accuracy can reach 0.1mm-0.2mm, and the reciprocating supercharger can also be used as an ultra-high pressure oil source to load the oil pressure of the working oil cylinder to 120MPa. pressure, and the present invention can also realize precise control of six-cylinder synchronous displacement in the process of liquid filling and overpressure.

Description

technical field [0001] The invention relates to the technical field of hydraulic control, in particular to a synchronous control system for a hydraulic oil cylinder of a six-sided top press. Background technique [0002] The six-sided top press is the main equipment for synthetic diamond synthesis in my country. Its working principle is: six working oil cylinders are opposite to each other on the three coordinate axes of XZY, and high-pressure oil is introduced from six directions to pressurize the center of the host machine. Push the piston forward to generate ultra-high pressure on the front end of the piston. Under the action of the hard alloy anvil in the center of the host machine, the production raw material block forms a sealed cubic ultra-high pressure chamber, which provides high-pressure conditions for synthetic diamond synthesis. During the pressurization process, the position accuracy of the press piston to the movement of the three coordinate centers has a decisi...

AI Technical Summary

Problems solved by technology

At present, there are many traditional six-sided press hydraulic systems such as figure 1 As shown, the electro-hydraulic control system is used to control various components in the hydraulic system, and the speed of the six working cylinders from the throttle valve 23 to the throttle valve 28 is used to adjust the speed of the six working cylinders from the working cylinder 3 to the working cylinder 8. Matching and synchronization accuracy requirements for oil cylinders, the existing problem is that there is no uniform standard for the adjustment process of the six fixed throttle valves, and manual adjustments are all based on experience, and are affected by fluctuations in oil temperature and compression deformation resistance of raw material blocks during work. The repetition accuracy of the synchronous displacement of the six working oil cylinders changes greatly, and the displacement speed of the six cylinders can only be adjusted and controlled during the liquid filling process of the press. In the overpressure section of 10~120MPa, the high pressure oil does not pass through the throttle valve 23 to the throttle. Flow valve 28, unable to adjust synchronous motion

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