High-synchronization pressing system and method for automatic sheet stack upender

Abstract

The invention discloses a high-synchronization pressing system and method for an automatic sheet stack upender. The high-synchronization pressing system comprises a pressing plate, a plurality of oilcylinders and a hydraulic system, wherein in the hydraulic system, a hydraulic pipeline of each oil cylinder is provided with an electro-hydraulic proportional valve used for controlling the working speed of the corresponding oil cylinder; speed detection modules and a control module are further included; the signal input end of the control module is connected with each speed detection module, andthe signal output end of the control module is connected with each electro-hydraulic proportional valve; and the control module is used for controlling the electro-hydraulic proportional valves to adjust the flow according to the moving speeds, detected by the speed detection modules, of piston rods of the multiple oil cylinders, so that the moving speeds of the piston rods of all the oil cylinders are consistent. According to the system, the synchronous movement of the piston rods of the multiple oil cylinders can be accurately controlled, the pressing effect of the pressing plate on a sheetstack is improved, the sheet stack is prevented from loosening or being extruded to deform in the overturning process, and meanwhile the phenomenon that the oil cylinders are stuck due to unbalancedstress is avoided.

Description

technical field [0001] The invention relates to a material overturning device and method, in particular to a high-synchronous pressing system and method for an automatic thin plate stack material overturning machine. Background technique [0002] In automobile production, doors are stamped and formed from sheet metal. Before stamping and forming, the incoming sheet is in the form of a stack. Since the left and right doors are symmetrical to each other, half of the sheet stock needs to be turned 180° before stamping. For example, the utility model patent with the authorized announcement number CN201089661Y discloses a thin-plate stacking automatic turning machine. The turning machine is mainly composed of a turning table, a bottom plate, an upper plate and an oil cylinder. Drive, the base plate, upper plate and oil cylinder are all arranged on the turning table, the base plate and the upper plate are relatively arranged, the oil cylinder is arranged on the upper plate, and ...

AI Technical Summary

Problems solved by technology

[0003] In the existing thin-plate stack automatic turning machine, since the pressure plate is jointly driven by multiple oil cylinders, the piston rods of multiple oil cylinders need to move synchronously. The existing thin-plate stack automatic turning machine works simultaneously by controlling multiple oil cylinders Or stop at the same time to control the synchronization between them, but this method is difficult to accurately control the synchronous movement of the piston rods of multiple cylinders. The piston rods of different cylinders often move at different speeds. On the one hand, it causes the pressure plate Being pulled and deformed, the pressing effect of the binder plate on the sheet stack is poor, the pressure distribution is uneven, and the thin sheet stack is prone to loosening or being squeezed and deformed. On the other hand, the inconsistent movement speed of multiple oil cylinders is easy to cause Cylinder stuck due to unbalanced force

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