Automobile door internal plate understructure

Abstract

The invention relates to an automobile door internal plate understructure which comprises a door opening seal region (1), a side wall seal region (3) and a binding flange region (4), wherein a step (2) is additionally arranged between the side wall seal region (3) and the binding flange region (4); the upper and lower round angle roots of the step (2) are provided with a drainage hole (5) in a penetrating mode; and the drainage hole (5) is manufactured by positive punching. The automobile door internal plate understructure has the advantages that the step is additionally arranged between the side wall seal region and the binding flange region, and the step is provided with the drainage hole, thus the traditional wedge mode is changed into a positive punching mode and the mold cost is greatly lowered.

Description

technical field [0001] The invention relates to the design field of automobile body-in-white parts, in particular to a lower structure of an automobile door inner panel. Background technique [0002] With the continuous progress of the automobile industry, people have more and more requirements for automobile functions and higher and higher requirements for the surface quality of parts, which requires designers to continuously improve the design and process level. Most of the door accessories are installed on the inner panel, and the requirements for the strength and rigidity of the inner panel of the door are relatively high. The overall drawing depth of the door inner panel parts is relatively large, and the lower part of the speaker, due to the cup-shaped drawing, also has wrinkling and cracking. The profile of the door opening and side wall sealing area 3 (see figure 1 As shown in the dotted line area), it needs to be assembled with the sealing strip, and the precision...

AI Technical Summary

Problems solved by technology

[0003] 1. Taking the AXX model as an example, the section line of the part corresponding to position A-A is as follows figure 2 As shown: there is a step on the door opening sealing area 1, the contact sequence of the sheet metal is inconsistent during the first drawing, and the door opening sealing area 1 contacts the sheet material later. Ripple phenomenon

During the secondary drawing, the sheet material in area A is easy to slide downwards, causing strain and deformation in the sealing area 1 of steps and door openings

The draining hole 5 is completed by side punching, and the punching burrs are large, which affects the quality of the parts

The use of wedges increases the cost of the mold

[0006] 4. Taking the SXX model as an example, the section line of the part corresponding to position A-A is as follows: Figure 5 Shown: The width of flange area 4 of the inner panel of the door is narrow (4.5mm), and the rollers interfere with the step of the drain hole during the hemming; after the glue is applied, the glue is applied unevenly and piled up around the inner panel, which affects the appearance quality; The pressing area of ​​the inner and outer panels is small (3.0mm), and the inner panel is easy to fall off the outer panel, which increases the amount of hemming adjustment and affects the strength and appearance

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