Balance control circuit for heavy-duty dual-function press beam balance with both return and loading functions

Abstract

The invention provides a heavy bi-functional press movable beam balance control loop with returning and loading functions. The heavy bi-functional press movable beam balance control loop comprises an oil tank, a variable pump oil supply sub-loop, a left inlet oil control sub-loop, a right inlet oil control sub-loop, an upper balance cylinder unloading sub-loop, a lower balance cylinder unloading sub-loop, an upper balance cylinder and a lower balance cylinder which is arranged on the lower surface of a movable beam and arranged at the position in corner symmetrical with the upper balance cylinder. The variable pump oil supply sub-loop communicates with the upper balance cylinder and a lower adjusting cylinder through the left inlet oil control sub-loop, and the variable pump oil supply sub-loop communicates with the lower balance cylinder and an upper adjusting cylinder. The heavy bi-functional press movable beam balance control loop can carry out balance control over the movable beam and can carry out returning control or auxiliary loading on the movable beam when balance control is not carried out so that the technical problems that an existing heavy press movable beam balance loop only meets the low-speed movement requirement of the movable beam during die forging and cannot meet the high-speed requirement of the movable beam during perpendicular extruding, the function is singular, and the utilization rate is low can be solved.

Description

technical field [0001] The invention relates to the technical field of heavy-duty hydraulic press control, and more specifically, relates to a heavy-duty dual-function press beam balance control circuit with return stroke and loading functions. Background technique [0002] Large-scale die forging hydraulic presses are key equipment for the production of large integral forgings in national defense, military and aerospace industries. The die forging hydraulic press applies load to the forging through the moving beam, and the forming quality of the forging depends on the running posture of the moving beam. When the hydraulic machine is working, due to the temperature and thickness differences of various parts of the forging blank and material inhomogeneity, or the multi-cylinder drive operation is not synchronized due to the leakage of the oil cylinder, resistance, manufacturing accuracy and elastic deformation of the structure, the deformation force of the die forging The re...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a device suitable for die forging of heavy-duty dual-function hydraulic presses and ferrous metal vertical extrusion processes, which can not only perform balance control on the moving beam, but also perform return control or auxiliary loading on the moving beam when the balance control is not performed. The heavy-duty dual-function press moving beam balance control circuit with return and loading functions is used to solve the existing heavy-duty press moving beam balance circuit. Technical problems with single function and low utilization rate

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