Hydraulic system of buffering cylinder of forging manipulator

Abstract

The invention discloses a hydraulic system of a buffering cylinder of a forging manipulator. The hydraulic system comprises an oil source oil supply opening, a proportional direction valve, an overflow valve, a one-way valve, the buffering cylinder, a pilot overflow valve, an electromagnetic direction valve, an oil source oil return opening, a displacement sensor, a displacement set signal, a subtractor and a PID (proportion integration differentiation) controller. A combined type multi-cavity structure of the buffering cylinder of the forging manipulator is utilized, a passive buffering system with the pilot overflow valve and an active displacement closed-loop control system with the proportional direction valve are integrated on the buffering cylinder, a passive buffering function of a clamp of the manipulator can be realized, and furthermore, a required displacement closed-loop control function of the buffering system of the forging manipulator is also realized. The hydraulic system has the advantages of simplicity in control and multiple functions. By a multi-cavity buffering mode of the buffering cylinder of the system, higher buffering force can be provided by the buffering cylinder with the same diameter. Besides, because proportional control elements are fewer, the reliability of the system is high.

Description

technical field [0001] The invention relates to a buffer cylinder hydraulic system, in particular to a buffer cylinder hydraulic system of a forging manipulator. Background technique [0002] The special working condition linked with the forging press requires that the tongs of the forging manipulator must have both passive buffering and active control functions in the horizontal direction. Most buffer cylinder hydraulic systems currently exist only have passive buffering functions and cannot realize The active control of the buffer cylinder limits the flexibility of the manipulator clamp in the horizontal direction. After searching the existing technology, it is found that the Chinese invention patent with the application number 200910153528.1 records a "horizontal buffer cylinder hydraulic system for forging manipulator", which realizes passive buffering and active buffering by means of a hydraulic cylinder with multiple chambers and piston rods. control function, but the...

AI Technical Summary

Problems solved by technology

[0002] The special working condition linked with the forging press requires that the tongs of the forging manipulator must have both passive buffering and active control functions in the horizontal direction. Most buffer cylinder hydraulic systems currently exist only have passive buffering functions and cannot realize Active control of the buffer cylinder, limiting the flexibility of the manipulator clamp in the horizontal direction

After searching the existing technology, it is found that the Chinese invention patent with the application number 200910153528.1 records a "horizontal buffer cylinder hydraulic system for forging manipulator", which realizes passive buffering and active buffering by means of a hydraulic cylinder with multiple chambers and piston rods. control function, but the structure of the buffer cylinder described in this patent is relatively complicated, and the force buffer system and the displacement closed-loop control system are coupled in the same oil circuit

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