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Hydraulic press constant power control structure and controlling means thereof

A technology of constant power control and hydraulic press, which is applied in the field of hydraulic press, can solve the problems of wasting motor power, etc., and achieve the effect of saving motor cost, stable and reliable operation, and good control effect

Inactive Publication Date: 2009-07-15
TIANJIN TIANDUAN PRESS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the selection of the main pump motor according to this formula will waste the power of the motor virtually.

Method used

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  • Hydraulic press constant power control structure and controlling means thereof
  • Hydraulic press constant power control structure and controlling means thereof
  • Hydraulic press constant power control structure and controlling means thereof

Examples

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Embodiment Construction

[0016] 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:

[0017] Such as figure 1 , figure 2 As shown, the constant power control structure of the hydraulic press includes a PLC (programmable logic controller) 3 arranged in the control system of the hydraulic press for controlling the hydraulic press 1, a rotatable operation box 2 provided on the hydraulic press 1 (there is a rotatable operation box 2 arranged on the hydraulic press 1) The touch screen of the programming control terminal), the splitter 5 connected with the PLC (programmable logic controller) 3, the slider rotary encoder 6 and the hydraulic cushion rotary encoder 7 separated by the splitter 5, are also set on the hydraulic machine 1 There are scale-up boards4.

[0018] Such as image 3 As shown, the model of the proportional ampl...

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PUM

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Abstract

A hydraulic machine constant power control structure and its control method, the structure includes: PLC, a rotatable operation box, a branch connected to the PLC, a slider rotary encoder and a hydraulic cushion rotary encoder separated from the branch, and the ratio is enlarged plate. The proportional amplifying board is connected to 0~±10V voltage, 24V voltage, 0V voltage, and 4~20mA current; the proportional amplifying board is also connected to the proportional electromagnet; it is also connected to the valve core displacement sensor through a double-shielded cable; connected to the variable mechanism through a double-shielded cable the swing angle sensor. The method is: calculate the power point; adjust the 0~±10V signal on the feet 14c and 16c of the proportional amplification board to the calculated power point P, and transmit it to the PLC through the serial communication RS232; Obtain required voltage starter motor pressurization on the pin 14c, 16c. The present invention realizes the constant power control of the hydraulic press because a proportional amplification board is arranged on the hydraulic press, which not only saves the cost of the motor, but also saves energy. Moreover, the hydraulic machine of the invention has good control effect and stable and reliable operation.

Description

technical field [0001] The invention belongs to the field of hydraulic machines, and in particular relates to a hydraulic machine constant power control structure and a control method thereof which can change pressure and flow rate under the premise of constant power and avoid motor power waste. Background technique [0002] At present, with the rapid development of the forging industry, the technical performance of the press is required to be higher and higher, and the application of constant power control technology is born. [0003] Usually, in order to meet the requirements of speed and pressure, etc., we choose the main pump motor according to the formula: Pmax=Pmax×Qmax / 612, among them, the maximum power of the first Pmax; the maximum pressure of the second Pmax ; Qmax maximum flow. However, selecting the main pump motor according to this formula will waste the power of the motor virtually. Contents of the invention [0004] In order to solve the technical problems...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B30B15/16
Inventor 李利清
Owner TIANJIN TIANDUAN PRESS CO LTD