Control Method of Constant Power of Proportional Pump Used in Research and Distribution of Hydraulic Press

Abstract

The invention discloses a proportional pump constant power control method for research and distribution of hydraulic presses, the steps are as follows: Step 1. During the working process of research and distribution hydraulic presses, the proportional pump changes the opening of the spool through the amplifying plate according to the process action to output different flow rates, thereby ensuring The control module judges whether the motor should enter the constant power control according to the running speed and beat of the slider down; step 2, the control module reads the power signal of the instrument, if the actual power P of the motor is equal to or exceeds the rated power P0 for more than 0.3s, then Execute step three, if the actual power P of the motor is less than the rated power P0, then execute step four; step three, the control module collects the pressure information of the slider through the pressure sensor, and outputs the proportional pump flow according to the constant power control method, power = pressure × flow ( P=P×Q), the pressure of the slider continues to rise and the speed is continuously slowed down, so as to ensure the rated power value of the motor and complete the pressing and forming action of the workpiece; step 4, the slider enters the pressure maintaining and subsequent process actions.

Description

technical field [0001] The invention relates to the technical field of presses, in particular to a constant power control method of a proportional pump used for researching and distributing hydraulic presses. Background technique [0002] With the rapid development of hydraulic press technology, the research and distribution hydraulic press has a wide range of applications and market prospects in the development of molds in automobiles and other industries. The use efficiency of the proportional pump in the traditional research and distribution hydraulic press design is always limited, and only the limited flow rate is used. The method is used to prevent the overcurrent of the motor, which does not give full play to the advantages of the proportional pump in control. Applying the constant power control of the proportional pump to the research and distribution hydraulic machine can not only prevent overcurrent, but also reduce the design and production costs. In this way, the...

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Problems solved by technology

[0002] With the rapid development of hydraulic press technology, the research and distribution hydraulic press has a wide range of applications and market prospects in the development of molds in automobiles and other industries. The use efficiency of the proportional pump in the traditional research and distribution hydraulic press design is always limited. The method is used to prevent the overcurrent of the motor, which does not give full play to the advantages of the proportional pump in control. Applying the constant power control of the proportional pump to the research and distribution hydraulic machine can not only prevent overcurrent, but also reduce the design and production costs.

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