High-precision sheet metal stamping die easy to demould

Abstract

The invention discloses a high-precision sheet metal stamping die easy to demould, and belongs to the field of stamping dies. According to the high-precision sheet metal stamping die easy to demould, through the arrangement of double pressing bags and a bidirectional air pipe, under the action of huge extrusion force during stamping, the double pressing bags are compressed, compressed gas in an inner supporting sheet generates position transfer, on the one hand, part of air enters a pneumatic elastic strip, so that the pneumatic elastic strip extends and expands towards the end part of a powder outlet pipe, and further generates pushing force on a graphite strip in the pneumatic elastic strip and is in contact with the outer surface of a stamping part, so that the outer surface of the stamping part is lubricated, the stamping part is effectively protected from being damaged when subjected to large stamping force, the part, making contact with the inner wall of a die cavity, of the stamping part is not prone to friction damage, and meanwhile, the demoulding difficulty is effectively reduced; and on the other hand, certain vibration force is generated on a fixed die in the stamping process, the situation that the stamping part and an upper die cavity of the fixed die are clamped due to air pressure is effectively avoided, and the demolding difficulty is further effectively reduced.

Description

technical field [0001] The invention relates to the field of stamping dies, in particular to a sheet metal stamping die with high precision and easy demoulding. Background technique [0002] Stamping is a forming processing method that applies external force to plates, strips, pipes and profiles by presses and molds to cause plastic deformation or separation to obtain workpieces (stamping parts) of required shape and size. Stamping and forging belong to plastic processing (or pressure processing) and are collectively called forging. The blanks for stamping are mainly hot-rolled and cold-rolled steel sheets and strips. 60-70% of the world's steel is plate, most of which are stamped into finished products. The body, chassis, fuel tank, radiator fins of the car, the steam drum of the boiler, the shell of the container, the iron core silicon steel sheet of the motor and electrical appliances, etc. are all stamped. There are also a large number of stamping parts in products su...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems existing in the prior art, the object of the present invention is to provide a high-precision and easy-to-release sheet metal stamping die, which, through the setting of double-pressure bladders and two-way air pipes, under the action of huge extrusion force during stamping, When the double pressure bag is compressed, the position of the compressed gas in the inner support sheet will shift. On the one hand, part of the air enters the pneumatic elastic strip, which makes the pneumatic elastic strip expand and expand towards the end of the powder outlet pipe, and then pushes the graphite strip inside it. Force and contact with the outer surface of the stamping part to achieve lubrication on the outer surface of the stamping part, effectively protect it when it is subjected to a large stamping force, the part of the stamping part in contact with the inner wall of the cavity is not easy to be damaged by friction, and at the same time effectively reduce the difficulty of demoulding. On the one hand, during the stamping process, a certain vibration force is generated on the fixed mold, which can effectively avoid the occurrence of the jamming between the stamping part and the upper cavity of the fixed mold due to air pressure, and further effectively reduce the difficulty of demoulding

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