三维建模约束下汽车车灯厚壁光导模具DFM优化

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中图分类号：TQ320 文献标志码：A

DFM optimization of thick walled optical guide mold for automotive headlightsunder 3D modeling constraints

LI Ran

（School of Information Engineering，Communication University of Shanxi，Jinzhong O3O619，Shanxi，China）

Abstract： Less manufacturing data for optical waveguide molds can affect the constraint conditions set during the 3D modeling process，resulting in lower mold modeling accuracy. Therefore，this article focuses on the optimization of design for manu facturing（DFM） for thick walled optical guide molds of automotive headlights under three-dimensional modeling constraints. Using laser triangulation，measure the three-dimensional structural data of the thick walled optical guide mold for car lights. Build a differential pyramid to transform theoretical models into manufacturable physical models. Introducing DFM technology，based on the DFM analysis mechanism of optical waveguide molds， design three-dimensional modeling constraints for thick walled optical waveguide molds for car lights from two aspects：

dimensional tolerance constraints and mold stiffness constraints. Based on the solid model， the static constraints are transformed into performance constraints under dynamic working conditions，and the DFM optimization of the optical guide mold is achieved through production numerical dynamic simulation. Experimental results have shown that the deviation of the mold modeled using the method proposed in this article is controlled within ±0.2mm ， the temperature fiting degree is closer to 1，and the deformation fitting amount is completely within the confidence interval，consistent with the trend of interval variation. The calculated response time can be kept below 0.5ms ，and the modeling response time is fast，achieving high-precision 3D modeling.

Key words： design for manu facturing（DFM） analysis;automotive headlights; thick walled optical waveguide mold; 3D modeling

0 引言

车灯厚壁光导模具是专门用于生产车灯中厚壁光导部件的模具[1。（剩余11780字）