A method for blanking thin plate workpieces using stamping parts

Abstract

The invention discloses a method for punching a thin-plate workpiece by utilizing a punching part, and belongs to the technical field of punching processes. The punching part is provided with a die holder, an upper die assembly and a lower die, wherein the die holder is driven to move up and down; the upper die assembly is fixed to the bottom part of the die holder and moves along the die holder;the lower die is arranged under the upper die assembly and is matched with the upper die assembly up and down; an oil cylinder ramming device is arranged on the bottom part of the die holder; a floating ejector rod assembly capable of floating up and down is arranged in the upper die assembly; the oil cylinder ramming device is abutted against the upper end of the floating ejector rod assembly; the lower end of the floating ejector rod assembly stretches into a die core slot in the bottom part of the upper die assembly; and the floating ejector rod assembly is driven by the oil cylinder ramming device. According to the method for punching the thin-plate workpiece by utilizing the punching part provided by the invention, during the return of the upper die assembly, the oil cylinder rammingdevice is utilized for pushing the floating ejector rod assembly to move downwards at the same time, and a workpiece is ejected out from the die core slot of the upper die assembly so as to be separated from the upper die assembly, so that the falling height of the workpiece is less, workpiece deformation cannot be caused, and the punching quality and the yield are greatly improved.

Description

technical field [0001] The invention relates to the technical field of punching technology, in particular to a method for punching thin plate workpieces by using punching parts. Background technique [0002] Punching is a stamping process that uses a die to separate part of the material or process part from another part of the material, process (process) part or waste. Blanking is a general term for the separation processes such as shearing, blanking, punching, punching, notching, sectioning, chiseling, edge trimming, tongue cutting, cutting, and trimming, and it accounts for the largest proportion in stamping production. In the blanking process, the sheet metal is sheared and deformed along a certain contour line by using the cutting edge of the die and separated. Except for the metal near the shear contour line, the sheet itself does not produce plastic deformation, so it is punched by a flat plate. The processed parts are still in a flat shape. [0003] Existing stampin...

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Problems solved by technology

[0006] Aiming at the problem that in the existing stamping process, the use of a punching rod to beat the material causes the workpiece to fall out of the mold cavity with a large drop height, and the workpiece is easily deformed when it hits the lower die after falling. method, the stamping part includes a mold base, an upper mold assembly and a lower mold, an oil cylinder feeding device is arranged at the bottom of the mold base, a floating ejector assembly that can float up and down is arranged in the upper mold assembly, and the floating ejector assembly is fed by the oil cylinder The device pushes down and pushes the workpiece out of the mold core groove of the upper mold assembly, which can separate the workpiece from the upper mold assembly while the upper mold assembly is returning. The falling height of the workpiece is small and will not cause deformation of the workpiece, greatly improving Improved punching quality and yield

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