彭俊　王世明　耿滏

摘 要：文章主要解决行李箱盖外板上段及外板下段搭接处无饰条状态时点焊困难的问题。通过采用特制异型焊钳，可以实现行李箱盖外板上段与外板下段搭接处Z向点焊，从而避免焊点外露，保证了行李箱盖无饰条状态时的外观品质。相比激光焊方案，异型焊钳点焊方案可以节省高昂的激光设备投入费用及巨大的场地空间;同时，采用异型焊钳方案无需通过饰条遮挡焊点，节省了饰条费用，降低了整车制造成本（单台降本约60元左右）。综上，行李箱盖异型焊钳点焊方案是一种非常实用且成本低廉的焊接方案，值得借鉴推广。关键词：行李箱盖;异型焊钳;饰条中图分类号：U466  文献标识码：B  文章编号：1671-7988（2020）11-163-03

Abstract： This paper mainly solves the problem of spot welding when there is no molding at the overlap of the upper section and the lower section of the trunk . By using special-shaped welding gun， z-spot welding can be realized at the joint of the upper section and the lower section of the trunk ， so as to avoid the exposed welding spots and ensure the appearance quality of the trunk when there is no molding. Compared with the laser welding scheme， the special-shaped welding gun spot welding scheme can save the high cost of laser equipment investment and huge space of the site; at the same time， the special-shaped welding gun scheme can save the cost of the molding and reduce the manufacturing cost of the whole vehicle （about 60 yuan per unit）. In conclusion， the spot welding scheme of special-shaped welding gun for trunk is a very practical and low cost welding scheme， which is worth learning and promoting.Keywords： Trunk; Special-shaped welding; MouldingCLC NO.： U466  Document Code： B  Article ID： 1671-7988（2020）11-163-03

前言

轎车行李箱盖因牌照及尾灯布置的影响并受限于冲压成型工艺，行李箱盖外板需进行分件，通常的分件方案是将行李箱外板分为外板上段、外板下段及尾灯安装板这三大部分。目前主流汽车企业针对行李箱盖外板上段与外板下段的焊接方案为激光钎焊或者X向点焊。采用激光钎焊，需投入高昂的设备费用以及足够的场地;采用X向点焊方案则需增加饰条，通过饰条对焊点进行遮挡，这也导致了整车成本的上升。针对以上两种方案的弊端，本文分析探讨了行李箱盖无饰条状态下的点焊方案：通过使用特殊异型焊钳进行Z向点焊，避免焊点外露。该方案无需饰条遮挡，降低了车身的制造成本，同时也保证了整车的外观品质。……