A multi-hydraulic cylinder synchronization system and a control method for the multi-hydraulic cylinder synchronization system

Abstract

The invention discloses a multi-hydraulic cylinder synchronization system and a control method of the multi-hydraulic cylinder synchronization system. The disclosed multi-hydraulic cylinder synchronization system includes two hydraulic control valves, three hydraulic cylinders and a rigid solid connection mechanism; two hydraulic cylinders are reference hydraulic cylinders, and the other hydraulic cylinders are follow-up hydraulic cylinders, and the The hydraulic control valve is a follow-up hydraulic control valve; it also includes a control unit and a feedback pressure sensor; the pressure of the predetermined hydraulic chamber of the follow-up hydraulic cylinder is detected by the feedback pressure sensor; the control unit is connected to the electric control terminal of the follow-up hydraulic control valve for signals; The control unit can determine the servo pressure of the servo hydraulic cylinder according to the detection signal of the feedback pressure sensor, and when the servo pressure of the servo hydraulic cylinder is greater than the first threshold value, make the servo hydraulic control valve connected to the servo hydraulic cylinder opening decreases. Using the multi-hydraulic cylinder synchronous system can reduce the control cost while improving the action synchronization accuracy of multiple hydraulic cylinders.

Description

technical field [0001] The invention relates to hydraulic control technology, in particular to a multi-hydraulic cylinder synchronous system, and also relates to a control method of the multi-hydraulic cylinder synchronous system. Background technique [0002] The multi-hydraulic cylinder synchronization system is widely used in the process of mold, mold manufacturing and product molding process. [0003] Please refer to figure 1 , which is a schematic diagram of the working principle of a multi-hydraulic cylinder synchronization system. The multi-hydraulic cylinder synchronous system includes a plurality of hydraulic cylinders 3 and a rigid solid connection mechanism 2; in addition, it also includes an appropriate hydraulic control valve to control the extension or retraction of the hydraulic cylinders 3. The fixed ends of multiple hydraulic cylinders 3 are respectively fixed on predetermined base components, and at the same time, the movable ends of multiple hydraulic cy...

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Problems solved by technology

[0004] Based on the fact that the hydraulic oil in the hydraulic system always flows to the hydraulic cylinder with a smaller load, it is impossible to guarantee the synchronization accuracy of multiple hydraulic cylinders 3 by using ordinary methods to control the multi-hydraulic cylinder synchronization system

At present, in order to make multiple hydraulic cylinders have high synchronization accuracy: one way is to force multiple hydraulic cylinders to act synchronously by increasing the rigidity of the rigid fixed mechanism 2; using this method is not only costly, but also the synchronization accuracy is very low. Difficult to meet actual needs

Another way is to supply the hydraulic oil to the control hydraulic cylinders separately through high-precision hydraulic control valves, and accurately control the movements of each hydraulic cylinder by controlling the flow of hydraulic oil to ensure the synchronization accuracy of the movements of multiple hydraulic cylinders; this method depends on Because the hydraulic control valve controls the accuracy of the hydraulic oil flow, either the control cost is too high, or the synchronization accuracy is difficult to meet the actual needs

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