某汽车车门焊接生产过程的计算机仿真（本科毕业论文设计）.doc

摘 要

本论文的目的是通过对长安之星二代汽车中门焊接生产线的分析、研究。利用计算机模拟焊接生产的过程。通过动画的形式模拟出焊接生产中：夹具夹紧顺序及其运动过程，零件装夹顺序，焊钳焊接顺序，焊接设备工艺参数。长安之星二代汽车中门的焊接生产线的工艺布局在中门焊接过程中起着重要的作用：包括焊接过程中中门的定位夹紧，保证中门零件之间正确的装配关系，同时保证中门焊接质量及焊接过程的顺利。并且尽量缩短中间的辅助工序的时间和精简设备，减少企业的投资，使企业具备更强的竞争力。
焊装夹具对于中门焊接具有重要意义，焊装夹具必须保证中门焊接后能获得正确的几何形状和尺寸, 尤其是保证中门上门窗等孔洞的尺寸和形状，焊装夹具应动作迅速, 操作方便。焊装夹具的设置应便于施工, 有足够的装配、焊接空间, 不能影响焊接操作和焊工观察并且夹紧可靠, 刚性适当。
长安之星二代汽车中门使用的材料是低碳钢薄板。现行的焊接方法中汽车工业的薄板焊接主要使用的是电阻焊技术。长安之星二代汽车中门的电阻焊全是电阻点焊。因此对点焊的工艺参数分析至关重要，电阻点焊的工艺参数包括焊接的电流，压力，通电时间，维持时间，休息时间。长安之星二代汽车中门的焊接设备是悬挂式点焊机DN3-160。DN3系列悬挂式点焊机的焊接变压器，一般都是悬挂在空中，通过柔性电缆与焊钳或反作用式焊枪相连结，这种变压器决定了悬挂式点焊机可以使点焊在一定空间内的任意位置进行。此外，悬挂式点焊机的焊钳、焊枪有多种结构形式供选择，所以悬挂式点焊机在本次中门的焊接生产中非常适应。


关键词：计算机仿真，生产线工艺布局，电阻焊，焊接夹具，工艺参数

ABSTRACT

The purpose of this paper is after analysis and research Chang'an Star second-generation rear door welding production lines. Use of computer simulation of welding production process. Through animation in the form of simulated welding production: clamping fixture and order movement, clamping order parts, welding clamp welding sequence, welding equipment technical parameters. Chang'an Star second-generation rear door in the process of welding production line layout in the process of welding the door play an important role: the process of welding including the positioning of the clamping doors to ensure that the right of the door between the parts of the assembly, while ensuring door in the welding quality of the welding process and smooth. And as short as possible central support processes of time and equipment to streamline and reduce corporate investment, the enterprises have stronger competitiveness.
Welding fixture in the door for the welding is of great significance, Welding fixture must ensure that the doors can be right after the welding of the geometric shape and size, especially in the door is to ensure that doors and windows and other openings the size and shape, Welding fixture should move quickly, Easy to operate. Welding fixture should be set up to facilitate the construction of adequate assembly, welding space, should not affect a welding operation and welder observation and clamping reliable, rigid appropriate.
Chang'an Star second-generation rear door in the use of the material is low carbon steel plate. The existing methods of welding of the automobile industry in the main sheet welding using a resistance welding technology. Chang'an Star second-generation rear door in the resistance welding all resistance spot welding. So on the spot welding process parameters critical analysis, the resistance spot welding process parameters, including the welding current, pressure, electricity, maintenance of time, rest time. Chang'an Star second-generation rear door in the welding equipment is hanging spot welding DN3-160. DN3 series of hang-point welder welding transformers, are generally hanging in the air, through the flexible cable and welding torch clamp or counterproductive-linked, such a decision transformer suspended spot welding machine can spot welding in a certain space within the arbitrary location. In addition, the hoisting of the welding clamp spot welding, torch a variety of forms for selection, hanging welder at this point is fit for the rear door welding.


Key words: computer simulation, layout of production lines, resistance welding, welding fixture, technical parameters













目 录

中文摘要 Ⅰ
ABSTRACT Ⅱ
1绪论 1
1.1 本课题研究背景及意义 1
1.2汽车焊装线的工艺布局及长安之星二代焊装线的工艺布局 1
1.2.1汽车焊装生产线的设计特点 2
1.2.2汽车焊装线的标准化 2
1.2.3模块化设计 5
1.2.4长安之星二代汽车中门焊装线工艺布局 7
1.3电阻焊的介绍及在长安之星二代汽车中门焊装线中的应用 10
1.3.1电阻焊的原理及介绍 10
1.3.2电阻焊设备 10
1.3.3电阻焊在长安之星二代中门焊装线上的应用 11
1.4汽车车身焊装生产线焊接夹具的介绍及长安之星二代中门焊装夹具的应用 12
1.4.1车身焊装夹具的设计要求 12
1.4.2车门焊装夹具的定位特点 13
1.4.3车门焊装夹具的夹紧特点 13
1.4.4长安之星二代汽车中门焊接夹具在生产线上的应用 14
1.5新型车身材料的点焊研究 20
1.5.1铝合金 20
1.5.2镀锌钢板 23
2 长安之星二代汽车中门焊接工艺的分析 24
2.1长安之星二代汽车中门材料焊接性分析 24
2.2 长安之星二汽车中门..