Stamping forming die of aluminum car door outside plate and rebound control method

Abstract

The invention provides a stamping forming die of an aluminum car door outside plate and a rebound control method. The stamping forming die comprises an upper die part and a lower die part, wherein theupper die part comprises an upper die holder, a flanging insert and a pressing core, the flanging insert is fixedly connected with the upper die holder, and the pressing core is elastically connectedwith the upper die holder; the lower die part comprises a lower die holder, a flanging male die and a support core, the flanging male die is fixedly connected with the lower die holder, and the support core is elastically connected with the lower die holder. The stamping forming die and the rebound control method have the beneficial effects that according to the rebound control method, stretch forming is introduced to the flanging procedure, so that secondary stretching is performed on materials in a car door product area, and the rebound of the product area is effectively controlled; the structure of the die is simple, the support core is convenient to disassemble, and the traditional flanging and the flanging of the introduced stretch forming can be realized at the same time by one die,so that the cost of the die is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of metal plastic processing and moulds, in particular to a method and a mold for effectively controlling the springback of aluminum car door outer panel stamping forming, which can greatly reduce the springback of aluminum covering parts and realize the stamping production of aluminum covering parts dimensional accuracy control. Background technique [0002] Nowadays, the automobile industry pays more and more attention to the considerations of vehicle performance such as comfort, durability, light weight, energy saving and environmental protection. Aluminum sheet materials can replace traditional steel in the automotive industry due to their advantages such as low density, good energy absorption, and good anti-corrosion performance. Material. Compared with the steel plate, the formability of the aluminum plate is poor, the elastic modulus is only one-third of the steel plate, and the springback is about th...

AI Technical Summary

Problems solved by technology

[0007] The invention with the application number CN201210135523.8, the patent name is the control method of side wall curling and springback of advanced high-strength steel stamping parts. The mold surface is processed into an inclined plane, so that the material is reversely deformed in advance to compensate for the curling and springback of the side wall. This invention is not suitable for the stamping forming of the car door

[0008] The invention with the application number CN201110287803.6, the patent name is a molding die for processing high-tensile plate parts, the invention patent makes the locking unit on the pressing plate and the upper die block, so that the pressing core and the locking unit The sheets between them are fully stretched and plastically deformed to overcome the large amount of springback after forming. This invention is not suitable for aluminum sheets

[0009] To sum up, most of the existing technologies are part springback control methods developed for steel plates or high-strength steel plates. The springback of parts is mainly controlled by compensating the mold surface or changing the mold structure. The deformation stress state of the parts, and thus the method of controlling the large springback of the aluminum cover has not been reported

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