某车型D柱下外板焊合件结构设计浅析

李标立

摘 要：尾灯创意和尾部零件的装配间隙面差是汽车尾部感官质量的重要基础，D柱下外板焊合件为尾灯创意设计提供物理空间，为尾灯、后蒙皮支架等零件提供安装点和定位基础，对尾灯创意设计和车辆尾部DTS起着重要的重要。通过对某车型的D柱下外板焊合件结构进行优化设计，统一零件的安装定位基准，保证零件的精度，有效保障尾灯创意设计空间和尾部零件的装配间隙面差。本文总结D柱下外板焊合件结构的设计特点，为后续车型开发提供方向。

關键词：D柱下外板 结构设计

A Brief Analysis of the Structural Design of the Welded Parts of the D-pillar Lower Outer Panel of a Certain Vehicle

Li Biaoli

Abstract：Taillight creativity and the assembly gap surface difference of the rear parts are important foundations for the sensory quality of the rear of the car. The welded parts of the outer plate under the D-pillar provide physical space for the creative design of the taillight， and provide installation points and the positioning foundation， which plays an important role in the creative design of taillights and DTS at the rear of the vehicle. By optimizing the structure of the welded parts of the D-pillar lower outer plate of a certain car model， the installation and positioning standards of the parts are unified， the accuracy of the parts is guaranteed， and the creative design space of the taillight and the assembly clearance of the tail parts are effectively guaranteed. This article summarizes the design features of the welded structure of the lower outer plate of the D-pillar， and provides a direction for subsequent vehicle development.

Key words：D-pillar lower outer panel， structural design

1 引言

随着汽车的普及程度提高，顾客越来越关注汽车的颜值。尾部区域颜值是客户关注重点区域之一，对尾灯创意和尾部的感官要求也越来越高，而尾灯的创意设计和尾部DTS往往受限于D柱下外板焊合件结构。D住下外板焊合件，与D柱上外板、后端板、侧围外板组成一个封闭的车身外侧面，为尾灯、后蒙皮支架、尾门限位器提供定位和安装点，该结构为尾灯提供结构空间，是车身的重要构件。因此，D柱下外板焊合件是尾部外观零件尾灯、后蒙皮的安装定位基础，其零件的精度、结构对尾灯的造型、结构，整车尾部的DTS和车辆密封有着重要影响。

现有结构特点

一般D柱下外板焊合件结构一般由后组合灯罩连接板、后组合灯罩支撑板、后蒙皮支架安装板、D柱下外板等零件组成，如图1所示。后组合灯罩连接板把侧围外板和D柱下外板连接起来，为尾灯前部提供结构空间，并提供Y向定位，零件精度影响尾灯与侧围外板的面差。……