Deep-cooling punching-shearing forming device for blank holder of micro-miniature workpiece and forming method thereof

Abstract

The invention relates to a deep-cooling punching-shearing forming device for a blank holder of a micro-miniature workpiece and a forming method thereof, and belongs to the field of mechanical engineering. The blank holder is provided with a storage groove for storing a low-temperature solution. A flow channel which leads to a plate and makes contact with the plate is formed in the bottom of the storage groove. A valve used for closing or opening is arranged in the flow channel. A male die driven by a hydraulic cylinder P1' moves in the blank holder to trigger the valve to be opened and closed. The storage groove is provided with a floating piston. The periphery of the blank holder is coated with a heat insulating material. A female die is arranged inside a female die support to be fixed. An ejection rod driven by a hydraulic cylinder P2 moves in the female die. The plate can be pressed on the edge of the female die by the blank holder under the action of force. The forming method based on the device comprises the five steps of plate clamping, cooling, punching and shearing, die releasing and shape detecting. The deep-cooling punching-shearing forming device for the blank holder of the micro-miniature workpiece and the forming method thereof have the advantages that the structure is novel, and when the micro-miniature workpiece is machined under the condition of deep cooling, it is beneficial to reducing rough edges and burrs, so that the machining precision of the workpiece is improved, and the mass production is achieved.

Description

technical field

[0001] The invention belongs to the field of mechanical engineering and is used for a plastic forming method for punching and shearing micro-sized workpieces or through holes, in particular to a cryogenic punching and shearing forming device for micro-sized workpieces and a forming method thereof. Background technique

[0002] Micro-small workpieces play a very important role in the electronics industry, and the contour and through-hole punching of micro-small workpieces play an important role in the field of micro-small workpiece processing. At present, ordinary processing methods at room temperature are still used in the punching and shearing of micro-sized workpieces, such as high-speed punching or multiple times of punching and shearing assisted by ultrasound. For small parts, ordinary punching and shearing is used. There are many burrs on the section of the workpiece, the surface is uneven, and the appearance of the section is poor, especially the precis...

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