A method for eliminating laser weakening traces on the passenger side of an automobile instrument panel

Abstract

The invention provides a method for removing an assistant driver side laser weakening trace of an automobile instrument panel. The method comprises the following steps: (1) grabbing and releasing a mold on an instrument board subjected to injection molding; (2) transferring the instrument board on correcting supports within 10s after mold releasing; ensuring that a weakening line is parallel to and in a middle position between upper cross beams of the two rectangular supports, wherein the length of the cross beams of the rectangular supports is not less than that of the weakening line; (3) pressing an upper part of the instrument board from a surface A to a surface B through a grabbing tool to realize correcting; downwards deforming a weakening line area on the upper part by 5-10 mm; keeping stable; maintaining for 20-30 seconds, wherein grabbing points of the grabbing tool are symmetrically arranged among two ends of the weakening line, the weakening line and the upper cross beams ofthe rectangular supports; (4) cooling the upper part of the instrument panel by air; (5) performing vibrating welding on the corrected upper part and a lower part after laser weakening, wherein the strength of the upper part of the instrument board is low, and the strength of the lower part is high; the upper part of the instrument board is driven to upwards spring back through the lower part after welding. Therefore, the weakening line is prevented from sinking; the surface trace is removed.

Description

technical field [0001] The invention relates to the field of processing automotive interior trim parts, in particular to a method for eliminating laser weakening traces on the passenger side of an automobile instrument panel. Background technique [0002] The airbag is an important part of the passive safety system of the car. In order to guide the deployment of the airbag, the relevant interior parts must be "weakened" in advance, and laser weakening is a major process form. [0003] The so-called "laser weakening" refers to the cutting process of cutting and drilling on the B side (back) of the interior parts, but retaining a certain residual material thickness on the A side (front) (see Figure 4 ), the technical difficulty lies in: it is necessary to ensure that the cutting is deep enough without leaving traces on the front. [0004] In actual production, after the parts are weakened, their own strength is greatly reduced; in the subsequent welding steps ( Figure 5 ), ...

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Problems solved by technology

[0003] The so-called "laser weakening" refers to the cutting process of cutting and drilling on the B side (back) of the interior parts, but retaining a certain residual material thickness on the A side (front) (see Figure 4 ), the technical difficulty lies in: it is necessary to ensure that the cutting is deep enough without leaving traces on the front

[0004] In actual production, after the parts are weakened, their own strength is greatly reduced; in the subsequent welding steps ( Figure 5 ), being "pulled" and deformed by other parts, causing the weakened line to sag, and the A side (front) produces obvious "marks", (see Image 6 ), causing serious appearance defects after loading (such as Figure 7 circle)

[0005] Laser weakening line traces are a difficult problem in the automotive interior industry. In the past, there was no good solution. We could only choose a compromise point between the physical contradictions of functional items (airbag deployment) and appearance items (surface traces), but this caused Both "function" and "appearance" have the risk of defects, and even endanger driving safety

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