Support pressure closed-loop control system and method for forging hydraulic press

A supporting pressure and closed-loop control technology, which is applied in the field of forging hydraulic presses, can solve problems such as stiffness, and achieve the effect of stable supporting pressure and avoiding impact

Active Publication Date: 2018-05-11
TIANJIN TIANDUAN PRESS CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

The traditional forging hydraulic press overcomes the self-weight of the slider through the design of the hydraulic circuit, and realizes the support of the downward movement of the slider. This open-loop control method is relatively rigid in the switching process from the rapid downward movement of the slider to the downward movement of the work. Therefore, the proportional servo valve design is applied. It is particularly important to develop a forging hydraulic press with flexible switching and smooth operation

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  • Support pressure closed-loop control system and method for forging hydraulic press
  • Support pressure closed-loop control system and method for forging hydraulic press

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Embodiment Construction

[0020] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0021] see figure 1 , a method for closed-loop control of the support pressure of a forging hydraulic press, the forging hydraulic press is a forging hydraulic press equipped with a pressure sensor and a proportional servo valve, and in this specific embodiment, the nominal force of the forging hydraulic press is 150mm / s at a working speed of 33.3MN, The working speed under the nominal force of 66.6MN is 75mm / s, and the working speed under the nominal force of 100MN is 55mm / s. The pressure closure control system includes: pressure sensor 1, programmable controller 2, and proportional servo valve 3 ; Among them: the pressure sensor 1 is used to collect the slider supporting pressure data in the lower cavity of the slider oil cylinder; the prog...

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Abstract

The invention discloses a support pressure closed-loop control system and method of a forging hydraulic press, comprising: a pressure sensor for collecting the support pressure data of the slider in the lower chamber of the slider oil cylinder; a programmable controller according to the input oil pressure data and Set the support pressure data for comparison, and output the control command through the improved PID control algorithm; the proportional servo valve is used to receive the control command to realize the control of the support pressure of the slider lower chamber of the forging hydraulic press; among them, the input port of the programmable controller It is electrically connected with the pressure sensor, and the output port of the programmable controller is electrically connected with the input terminal of the proportional servo valve. The invention introduces the improved PID control algorithm into the forging pressure closed-loop control system, and improves the stability of the support pressure of the slide block of the forging hydraulic press under different tonnages and working speeds.

Description

technical field [0001] The invention belongs to the technical field of forging hydraulic presses, in particular to a support pressure closed-loop control system and method for forging hydraulic presses. Background technique [0002] With the increasingly wide application range of large tonnage hydraulic presses, digital control technology has also been widely used in forging hydraulic presses, so forging hydraulic presses also put forward higher requirements for the stability of the slider. The traditional forging hydraulic press overcomes the self-weight of the slider through the design of the hydraulic circuit, and realizes the support of the downward movement of the slider. This open-loop control method is relatively rigid in the switching process from the rapid downward movement of the slider to the downward movement of the work. Therefore, the proportional servo valve design is applied. It is particularly important to develop a forging hydraulic press with flexible swit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J9/20
Inventor 计鑫
Owner TIANJIN TIANDUAN PRESS CO LTD
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