Mechanical deformation compensation control method for forging hydraulic press

Abstract

The invention relates to a mechanical deformation compensation control method for a forging hydraulic press. The mechanical deformation compensation control method is characterized by comprising the working flow that 1), a signal is input to control the opening degree of a servo valve so as to enable movable beams of the press to rapidly descend; 2), after the movable beams are in contact with a forging piece, the movable beams are turned into work, and the frame is deformed by the central force or eccentric load force; 3), the stress strain gauges pasted on the frame are subjected to stress change when the frame is deformed, the resistance values of the strain gauges change, and measured changed electrical signals are fed back to a system; 4), the fed back signals are compared, the signals and the measured values of a displacement sensor are calculated, the actual size of a workpiece is obtained, and the specific calculation method is given below; 5), when forging is completed once, the movable beams return back to the designated position; and 6), the system stops or returns to the first step to carry out the secondary forging. By the adoption of the mechanical deformation compensation control method, the defects of a traditional control method are overcome, the influence of a mechanical body of the forging hydraulic press under the eccentric load working condition on the force deformation in the forging process is fully taken into account, and the forging precision of the forging piece is improved.

Description

technical field [0001] The invention relates to a precision control method of a forging hydraulic press, in particular to a mechanical deformation compensation control method of the hydraulic press under partial load conditions. Background technique [0002] Forging hydraulic press is one of the key equipment in heavy machinery and occupies a pivotal position in the machinery manufacturing industry. With the continuous advancement of science and technology and the rapid development of the forging industry, people have put forward higher requirements for the forging precision of forgings. However, the control strategy of the existing forging hydraulic presses is mostly the control of the system, and the precision control of the forging also stops at the control of the hydraulic cylinder of the actuator, which is not accurate to the position of the anvil, and the size of the forging is not directly measured. Considering the influence of the mechanical body deformation of the ...

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Problems solved by technology

Various deformations of the above racks will affect the forging accuracy of the press

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