Metal shell forming method and device

Abstract

The invention discloses a metal shell forming method and device, wherein a metal shell high-pressure forming method comprises the following steps: locating a metal plate in a die including an upper die, a lower die and a die core, and locating the metal plate on the die core; heating the die by a heating device to heat the metal plate; and applying high-pressure gas in multi-level mode to the metal plate so as to drive the metal plate to be pressed on a surface of the die core and form the metal shell. On the other hand of the invention, a metal shell high-pressure forming device particularly comprises the heating device combined with an external surface of the die and used for heating the die and the metal plate, a high-pressure gas supply unit for applying the high-pressure gas to the metal plate, and a digital control unit for controlling the high-pressure gas supply unit in digital form to apply the high-pressure gas to the metal plate in multi-level mode to form the metal shell.

Description

technical field [0001] The invention relates to a method and device for forming a metal shell, in particular to a high-pressure forming method and device for a metal shell. Background technique [0002] Forming metal sheets, plastic sheets, and the like into shapes is a fairly common technique, such as into keypads, consumer electronics housings, and the like. The general forming methods include stamping, vacuum forming or high pressure forming. When forming a metal plate with low ductility into a casing, stamping may easily cause local damage or strain, resulting in defective products, and thick baking varnish must be used to cover the scars; the strength of vacuum forming is insufficient, and it is not easy to form bends during forming The angle makes the lead angle too large, the edges and corners are not clear enough, and the shape is not beautiful. High-pressure molding often cannot be formed due to insufficient temperature and one-time forced compression, or it is ea...

AI Technical Summary

Problems solved by technology

When forming a metal plate with low ductility into a casing, stamping may easily cause local damage or strain, resulting in defective products, and thick baking varnish must be used to cover the scars; the strength of vacuum forming is insufficient, and it is not easy to form bends during forming The angle makes the lead angle too large, the edges and corners are not clear enough, and the shape is not beautiful

High-pressure molding often cannot be formed due to insufficient temperature and one-time forced compression, or it is easy to break or easily deform the edges and corners, which damages the appearance

Or under higher temperature operation, costly

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