激光高速冲击点焊的工艺实验

张洪峰; 王霄; 钱清; 李建文; 刘会霞

doi:10.3788/OPE.20152313.0297

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激光高速冲击点焊的工艺实验

更新时间：2020-08-13

- 激光高速冲击点焊的工艺实验
- Technological experiments of laser high-speed impact spot welding
- 光学精密工程 2015年23卷第10z期页码：297-304
- 作者机构：
  
  江苏大学机械工程学院,江苏镇江,212013
- 作者简介：
- 基金信息：
  
  国家自然科学基金资助项目(No.51175235)();江苏省自然科学基金资助项目(No.BK2012712)()
- DOI：10.3788/OPE.20152313.0297
  中图分类号： TG485
- 收稿日期：2015-03-15，
  
  修回日期：2015-05-01，
  
  纸质出版日期：2015-11-14
- 稿件说明：
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张洪峰, 王霄, 钱清等. 激光高速冲击点焊的工艺实验[J]. 光学精密工程, 2015,23(10z): 297-304

ZHANG Hong-feng, WANG Xiao, QIAN Qing etc. Technological experiments of laser high-speed impact spot welding[J]. Editorial Office of Optics and Precision Engineering, 2015,23(10z): 297-304
张洪峰, 王霄, 钱清等. 激光高速冲击点焊的工艺实验[J]. 光学精密工程, 2015,23(10z): 297-304 DOI： 10.3788/OPE.20152313.0297.

ZHANG Hong-feng, WANG Xiao, QIAN Qing etc. Technological experiments of laser high-speed impact spot welding[J]. Editorial Office of Optics and Precision Engineering, 2015,23(10z): 297-304 DOI： 10.3788/OPE.20152313.0297.

摘要

将激光诱导冲击波作为一种驱动加载方式运用于高速冲击点焊

以研究厚度小于100

m的异种金属箔板组合的固态点焊连接。设计并搭建了激光高速冲击点焊实验平台

实验中选择30

m的钛箔和T2紫铜为复板

100

m厚的铝箔为基板

对影响激光高速冲击点焊连接质量的主要工艺参数

包括碰撞角度、复板的飞行距离和冲击速度进行理论和实验研究。利用显式有限元软件AUTODYN中的光滑粒子流体动力学(SPH)法数值模拟了激光高速冲击点焊的焊接过程

结果显示随着飞行距离和冲击速度增大

焊接界面的形貌逐渐由平直状过渡到微波状

以至变成漩涡状

最后成功复制出了中心未连接区域和环状焊接区域。此外

通过观测非连接区域和焊接区域的剪切应力和有效塑性变形

发现当复板和基板碰撞界面处的剪切应力方向相反

且有效塑性变形大于0.4时

才能实现有效的固态冶金结合。

Abstract

A solid state spot welding technique based on the laser induced shock waves was proposed to achieve the solid-state spot welding between dissimilar metal combinations with the thickness less than 100

m. An experimental platform of laser impact spot welding was designed and built. In welding

m Ti and T2 pure copper were chosen as the flyer plates

and 100

m Al as the base plate. Parameters including collide angle

impact velocity and the standoff distance

which mainly affect the welding quality

were investigated theoretically and experimentally. The Smooth Particle Hydrodynamic(SPH) method in AUTODYN was applied to simulation of laser impact spot welding process. It is shown that with the increases of impact velocity and standoff distance

the interface morphology turns from straight to small wavy and finally to vortex wavy. Finally

a central un-bonded region and a circular bonded region are duplicated. Moreover

it is shown that when the shear stress direction is opposite and the effective plastic strain is above 0.4 at the interfaces the successful bond can be achieved.

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references

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