Intellectualized failure recovery method and device for liquid filling and shaping hydraulic press for sheet material
A troubleshooting method and liquid-filled forming technology, which is applied in the control field of hydraulic presses, can solve problems such as damage to convex and concave dies, wrinkling, and sheet cracking, and achieve safe and reliable use
Active Publication Date: 2011-06-08
FOSHAN CONSTANT HYDRAULIC MACHINERY
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Problems solved by technology
However, in the liquid-filled forming process of the sheet, if the pressure, speed, and displacement parameters are not set properly, the sheet will often be severely cracked or wrinkled
When the plate breaks, the energy accumulated by the ultra-high pressure liquid is released instantly, which will cause large shock and vibration, seriously affecting the safety of the operator and the machine
Cracking or wrinkling will also cause serious friction between the sheet and the surface of the punch and the liquid chamber die, which not only affects the quality of the drawn part, but sometimes the sheet will be stuck in the liquid chamber or seriously damage the punch and die
Method used
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[0012] The intelligent troubleshooting method for the liquid-filled forming hydraulic press of the sheet material of the present invention is realized in this way. A pressure sensor is set in the liquid chamber. When the hydraulic press is drawing the sheet material, the pressure in the liquid chamber is detected by the pressure sensor. In the working section of the drawing process, the pressure of the liquid chamber in the next period must be greater than or equal to the pressure of the liquid chamber in the previous period. Only when the plate breaks, the pressure of the liquid chamber suddenly drops, causing the pressure of the liquid chamber in the next period to be less than When the absolute value of the pressure difference of the liquid chamber pressure in the previous period is greater than the set value, the system can judge that the plate is broken, and realize the elimination of the broken fault by controlling the hydraulic press to stop automatic operation.
[0013]...
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The invention provides an intelligent method and a device for removing faults, which is used for plate liquid-filled forming hydraulic presses. The device is characterized in that a pressure sensor is arranged in a liquid chamber; when a hydraulic press draws a plate, the pressure of the liquid chamber is detected through the pressure sensor; during a deep-drawing work stage under normal conditions, the pressure of the liquid chamber in a next period is definitely higher than or equal to that in a previous period; only when the plate breaks, the pressure of the liquid chamber is caused to decrease suddenly, which causes the pressure of the liquid chamber in the next period is lower than that in the previous period; and when the absolute value of a pressure difference is more than a set value, a system can judge the plate to be broken and remove break faults by controlling the hydraulic press to stop automatic operation. Compared with the prior art, the invention has the advantages that the device for removing faults can diagnose the wrinkling or break faults in real time and automatically remove the faults in time, and is safe and reliable to use.
Description
technical field [0001] The invention belongs to the technical field of control of hydraulic presses, and in particular relates to an intelligent real-time fault diagnosis and troubleshooting method and device for sheet material liquid-filled forming hydraulic presses. technical background [0002] The plate liquid-filled forming body is used as a force transmission medium to make the plate close to the mold under the pressure of the force transmission medium. The realization technology is a new plate forming technology. It is based on the forming of ultra-high pressure liquid sheet. The products produced by this technology have high dimensional accuracy, good surface quality and significantly improved mechanical properties. However, in the liquid-filled forming process of the sheet, if the pressure, speed, and displacement parameters are not set properly, the sheet will often be severely cracked or wrinkled. When the plate breaks, the energy accumulated by the ultra-high p...
Claims
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IPC IPC(8): B30B15/16B30B13/00
Inventor 方锦荣张悦李百炼何景晖杨剑武
Owner FOSHAN CONSTANT HYDRAULIC MACHINERY