摘要当前汽车行业竞争激烈，并且面临着全世界的资源匮乏污染严重形势下，在这严峻的形势下，为了巩固在汽车行业中的地位，长安马自达正在发展新的车型，实现减重来提高动力性能，以及跟紧节能减排的大趋势，由于减少车身的无效重量成为一个必然趋势，所以为了在不改变汽车车身性能的同时减少车身的重量我们改采用了较多的使用高强钢以及镀锌高强钢，所以白车身采用高强钢和镀锌高强钢板，对点焊质量提出了更高的性能要求。原始传统的车身焊接较少采用高强钢，在提高性能的同时，降低车身的无效重量，这就需要使用到高强钢板材（在保证强度、韧性、疲劳强度、钢性和抗冲击能力的前提下，降低板材的厚度，从而达到减少无效重量的目的。）但是存在的问题是，高强钢焊接性比较差，容易产生焊接裂纹等缺陷，对焊接工艺更加严格，国外福特及马自达的工艺并未转让到合资企业，目前缺少完整的合理的焊接工艺，急需全套焊接工艺与质量控制技术：满足新型车辆的研发与批量生产的要求，同时满足焊接工艺与质量数据库的迫切需求。68189

毕业论文关键词  高强钢 镀锌高强钢 点焊 电极头 

毕业设计说明书（论文）外文摘要

Title    Automotive Body In White Spot Welding Research                     

Abstract

The current automotive industry is highly competitive, even in the face serious pollution of the world's resources are scarce situation, In that grim situation, in order to consolidate the position in the automotive industry, Changan Mazda is developing new models to improve the dynamic performance to achieve weight loss and followed closely the trend of energy saving due to reduced body weight to become an inevitable trend ineffective, so in order to not change the auto body performance while reducing the weight of the body we are more used to change the use of high-strength steel and high-strength galvanized steel, so the white body uses high-strength steel and galvanized high-strength steel, for welding a higher quality performance requirements. Original traditional high-strength steel body welding less used in improving performance while reducing body weight is invalid, which need to use high-strength steel plate (in ensuring the strength, toughness, fatigue strength, rigidity and impact resistance of the premise , reducing the thickness of the sheet, so as to reduce the weight of an invalid object.), but a problem is that the relatively poor strength steel welding, the welding defects such as cracks easily, the welding process is more stringent, Ford and Mazda foreign transfer process does not to the joint venture, the current lack of a complete rational welding process, welding processes and needed a full set of quality control technologies: research and development and new vehicles to meet the requirements of mass production, while meeting the quality of the welding process and the urgent needs of the database.

Keywords    high-strength steel、Galvanized of identity、Spot Welding、Insert Electrode Tip

目录

一  引言 1

1.1  背景与意义： 1

1.2  汽车车身白板点焊的研究现状： 1

1.3  论文所研究的内容： 9

二  汽车白车身两层高强钢机器人点焊工艺试验研究：