An electro-hydraulic hybrid press and its control method

Abstract

The invention discloses an electro-hydraulic mix press machine and a control method thereof. An upper beam plate of a press machine body is provided with two vertical hydraulic cylinders, and the twohydraulic cylinders and corresponding workbenches form a left working unit and a right working unit. For the left working unit and the right working unit, a mechanical drive unit and a hydraulic driveunit which are used in common are arranged. The mechanical drive unit is composed of a drive motor through an electromagnetic clutch, an electromagnetic brake and a feed screw nut transmission mechanism driven by a gear pair. According to the load characteristics of the working process of a hydraulic machine, the mechanical drive unit or the hydraulic drive unit is selected to provide energy forthe two working units. According to the electro-hydraulic mix press machine, by means of the arrangement of the two hydraulic cylinders and the mechanical drive unit, rigid connection is achieved to keep a synchronous moving manner, the potential energy of moving components is recovered, the energy loss is reduced, the advantages of hydraulic transmission and the advantages of mechanical transmission are composited, and the working efficiency and precision of the press machine are effectively improved.

Description

technical field [0001] The present invention relates to a press machine and its control method, in particular to a press machine with electro-hydraulic hybrid dual actuators and its control method, which is used to maintain the higher efficiency of the drive system and reduce the energy in the working process of the press machine Loss, reduce material consumption and parts usage in the press manufacturing process, improve the movement speed and precision of the moving parts of the press actuator, and improve the working efficiency of the press. Background technique [0002] As an important part of the forming equipment, the hydraulic press has a stable transmission and simple control, and has a wide range of applications. However, there are many energy conversion links in the hydraulic press, and the energy use efficiency is low. There are problems of load characteristics and drive mismatch and potential energy waste. When the hydraulic transmission is working, the noise and...

AI Technical Summary

Problems solved by technology

However, the hydraulic press has many energy conversion links, low energy use efficiency, load characteristics and drive mismatch, and potential energy waste. When the hydraulic transmission is working, the noise and vibration are large, the movement speed of the actuator is slow and unstable, and the movement accuracy is low. Efficiency, precision and energy consumption control of presses

[0003] Recycling the potential energy in the process of falling the moving parts of the actuator has a certain effect on energy saving, but there are two processes of storage and reuse in the energy recovery process, so the energy conversion link is added, and the complexity of the conversion process is reduced. Energy utilization efficiency also affects the controllability of the system

[0004] On the other hand, the forming process of products often needs to go through multiple processes. It is common to use multiple presses in the production of existing forming workshops. Therefore, how to reduce material consumption and the use of parts while meeting the performance requirements of the press, and improve Production efficiency, reducing energy consumption during use has become an urgent problem to be solved

[0005] However, the mechanical press adopts rigid connection and motor drive, resulting in poor flexibility of the system and it is difficult to generate a large working pressure. At the same time, under the same pressing requirements, the motor power of the mechanical press is higher, which makes the press consume more energy.

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