A Size Compensation System for Large Hydraulic Press

Abstract

A large hydraulic machine size compensation system comprises a displacement sensor fixed to a lower beam through a fixing support; a sliding block on the displacement sensor is connected with the lower end of a fixing rod through a pin shaft; the upper end of the fixing rod is fixedly connected with an upper beam through an upper fixing block; the upper fixing block and the fixing rod are fastened through lock nuts; the signal output of the displacement sensor is connected with the input of an electrical control system; the output of the electrical control system is connected with the input of a hydraulic control system; forging on a forge piece is completed through the hydraulic control system; the displacement sensor is used for measuring direct displacement changes of the upper beam and the lower beam; the displacement sensor is used for transmitting the real-time deformation amount of a framework to the electrical control system so that forging size correction can be performed; the hydraulic system is controlled to complete forging on the forge piece; it is achieved that actual forging size and the set size are within actual control precision; the size precision of the forge piece is improved; and the overall forging time is shortened, and therefore the production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of large hydraulic presses, in particular to a size compensation system for large hydraulic presses. Background technique [0002] In the free forging press, with the development of hydraulic pressure and control technology, the dimensional control accuracy is greatly improved, generally ±1mm. For super-large presses over 10,000 tons, the dimensional control accuracy can reach ±2mm, and automatic control higher level. However, for large presses, during forging, the force deformation of the frame has an impact on the size control. The larger the tonnage of the press, the larger the frame, the greater the force deformation, and the actual forging size is larger than the set size. For presses below 5,000 tons, the frame deformation is small, generally 1-2mm, which has little influence on the actual forging size; but for presses above 5,000 tons, especially for presses above 10,000 tons, the frame deformation i...

AI Technical Summary

Problems solved by technology

For large forgings, it is not easy to measure the actual size during the high-temperature forging process. The actual forging can only be completed by the size control of the press. The deformation of the frame often makes the actual forging size larger than the set size, which makes the utilization rate of forging materials reduce

In the free forging process, since the forging force required for each forging is different according to the forging material, temperature, reduction amount, etc., the method of fixed value compensation cannot be simply used for dimensional revision

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