Multi-curvature automobile bending plate stamping processing die and method

Abstract

The invention discloses a multi-curvature automobile bending plate stamping processing die and method. The multi-curvature automobile bending plate stamping processing die comprises a primary punch for punching a raw material plate into a primary bending plate; first R angle pressing surfaces are arranged on two side edges of the bottom surface of the first punch; the angle of each of the first Rangle pressing surfaces is less than 90 degrees; the first R angle pressing surfaces are used for compensating the R angle resilience force of the primary bending plate; a second R angle pressing surface has the same structure as the first R angle pressing surfaces; the side face, opposite to a lower oblique plane guide seat, of a secondary punch is an upper punching oblique plane; the upper punching oblique plane is parallel with the lower oblique plane guide seat; and the upper punching oblique plane and the lower oblique plane guide seat are used for processing the obtuse angle oblique plane bending plate of a secondary bending plate in a cooperating manner. The multi-curvature automobile bending plate stamping processing die can effectively reduce the plate deformation of single stamping to enable the punching process to be more stable and ensure the plate strength; and the bending plate is enabled to rebound to a standard angle precisely during the rebounding process so as to process a standard bending plate with the demanded size.

Description

technical field [0001] The invention belongs to the technical field of stamping dies, in particular to a stamping processing die and method for multi-curvature automobile bent plates. Background technique [0002] Automobile bending plate is a very difficult workpiece. There are 4 bending parts on the bending plate, one bending part is an obtuse angle inclined surface structure, and the other bending parts are right angle structure. The current processing method is one-time upper and lower die stamping forming. This kind of processing method, on the one hand, will lead to excessive deformation of the sheet in a single bending, and the sheet will be easily subjected to excessive force and cracks will appear, and the strength will be affected; The bending part will undergo rebound deformation under the action of internal stress, and the angle of each bending part will become larger, so that the formed part cannot reach the qualified size. Contents of the invention [0003] ...

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Problems solved by technology

[0002] Automobile bending plate is a very difficult workpiece. There are 4 bending parts on the bending plate, one bending part is an obtuse angle inclined surface structure, and the other bending parts are right angle structure. The current processing method is one-time upper and lower die stamping forming. This kind of processing method, on the one hand, will lead to excessive deformation of the sheet in a single bending, and the sheet will be easily subjected to excessive force and cracks will appear, and the strength will be affected; The bending part will rebound and deform under the action of internal stress, and the angle of each bending part will become larger, so that the formed part cannot reach the qualified size

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