Self-adaptive pre-control method for movable beam position of oversize water press

Abstract

The invention relates to a self-adaptive pre-control method for movable beam position of oversize water press, aiming to develop a method with the function of self-adaptive pre-control of movable beam besides the function of normal position closed loop control according to the characteristics of the oversize hydraulic press for free forging in forging process such as heavy pressure, large inertiaand multiple types; a predictive control calculating model is designed based on the comprehensive consideration of the factors such as various forgings, forging pressure of water press, inertia and lag of control valve assembly to pre-control the position through simple engineering arithmetic, thereby solving the difficulty for the movable beam of the water press to control the size precision of the forging in forging process; and the method efficiently solves the problem that the variation of the forgings, large pressure, large inertia and lag of control valve assembly influence the control of the forging precision, thereby reducing the follow-up processing time, improving working efficiency and decreasing the energy and material consumptions.

Description

technical field [0001] The invention relates to an equipment control method for an extra-large free forging hydraulic press. Background technique [0002] At present, the dimensional accuracy of forgings of domestic old-fashioned large-scale hydraulic presses is about ≥±10mm, and even new-style large-scale hydraulic presses with relatively high technical levels can only reach ±5mm. Improving the precision of forgings is of great significance to saving energy and raw materials. In order to improve the forging precision, it is necessary to improve the control motion precision of the moving beam. However, when the moving beam is at different positions, the gap between the two is different due to the different degrees of bending deformation of the column; the radiant heat of the forging will also cause a temperature gradient in the column, which will increase the deformation of the column. If the stroke of the brake beam is controlled according to the pure position closed-loop...

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Problems solved by technology

[0003] In view of the problems existing in the above-mentioned prior art, the object of the present invention is to develop a self-adaptive pre-control method for the position of the movable crossbeam in view of the characteristics of large pressure, large inertia and many varieties in the forging process of this super large free forging hydraulic press. Design a predictive control calculation model to solve the problem of controlling the dimensional accuracy of the hydraulic press movable beam and connected parts during the forging process, and develop a method with adaptive pre-control of the movable beam position in addition to the normal closed-loop control of the position , comprehensively consider the factors such as the variety of forgings, the forging pressure of the hydraulic press, the inertia, and the lag of the control valve group, and pre-control the position through a simple engineering algorithm, so as to achieve the purpose of solving the problem

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