| 摘要: |
| 在电阻点焊生产过程中,时常会遇到不同层数的搭接点焊接头.由于多层板接头在实际点焊过程的焊材厚度发生了明显的变化,使得焊机二次回路中的阻抗大幅度波动.因而焊接热量也必然产生显著波动.若不能及时有效地实时调节焊接热量,熔核质量无法保证.通过对焊接热过程的动态测试与分析,探讨了3种不同机制监控方法对低碳钢多层数点焊的适应性,为生产企业选择准确的监控模式和进行有效的质量控制提供了科学依据. |
| 关键词: 低碳钢 多层板点焊 动态过程 监控模式选择 |
| DOI： |
| 分类号: |
| 基金项目: |
|
| Test and analysis of dynamic process for spot welding of multilayer low carbon steel sheets |
|
LI Guizhong, DING Jian, QIN Yuchan, WANG Wenquan
|
|
School of Materials Science and Engineering, Jilin University, Changchun 130025, China
|
| Abstract: |
| In the spot welding process,the spot-welded joints of multilayer sheets were always available. The variation of the sheet thickness is obvious in the spot welding process,which makes the impedance fluctuation drastic in secondary circuit of welding power transformer. Thus,the spot welding heat also fluctuates evidently. In this case,the nugget quality cannot be guaranteed if welding heat is not regulated effectively in real time. By means of dynamic test and analysis of welding thermal process,the applicability of different monitoring methods was discussed for spot welding of multilayer low carbon steel sheets. The scientific basis therefore can be provided for manufacturing enterprises to select the exact monitoring method and to achieve the effective quality control. |
| Key words: low carbon steel multilayer sheets spot welding dynamic process monitoring method selection |
