压力采集滤波系统在铝合金电阻点焊中的研究及应用  

Research and Application of Pressure Acquisition Filter System in Resistance Spot Welding of Aluminum Alloy

作　　者：郑伟[1] 路向琨 ZHENG Wei;LU Xiangkun(School of Mechanical and Electrical Engineering and Automation,Tianjin Vocational University,Tianjin 300410,China;Tianjin Qisuo Hi-tech Co.,Ltd.,Tianjin 300409,China;No.707 Research Institute of CSSC,Tianjin 300131,China)

机构地区：[1]天津职业大学机电工程与自动化学院,天津300410 [2]天津七所高科技有限公司,天津300409 [3]中国船舶集团有限公司第七〇七研究所,天津300131

出　　处：《热加工工艺》2024年第15期49-52,58,共5页Hot Working Technology

摘　　要：为了采集铝合金点焊过程中的压力变化量,实现实时监测熔核状态,提高焊点质量,设计了一种铝合金点焊压力采集的滤波系统。第一步,设计采集电路,实现对压力信号的实时采集和电平转换;第二步,通过对压力信号干扰源的分析,设计硬件滤波和软件滤波相结合的方法,以解决压力信号受干扰的问题。实验结果表明,采用本系统得到的压力波形变化平稳,能够准确反映焊接过程中的压力变化和熔核状态。采用本系统后焊点熔核直径平均值提高了10%,而且焊点无裂纹,气孔也较少。In order to collect the pressure change in the process of aluminum alloy spot welding,realize real-time monitoring of nugget state and improve the quality of welding joint,a filter system for pressure acquisition of aluminum alloy spot welding was designed.The first step,the acquisition circuit was designed to realize the real-time acquisition and level conversion of pressure signal;the second step,based on the analysis of the interference source of pressure signal,the method combining hardware filtering and software filtering was designed to solve the problem of pressure signal interference.The experiment results show that the pressure waveform obtained by the system changes smoothly and can accurately reflect the pressure change and nugget state in the welding process.After the use of the system,the average nugget diameter of the solder joint is increased by 10%,and the solder joint has no cracks and fewer pores.

关 键 词：铝合金点焊 压力采集 巴特沃斯滤波器 滑动均值滤波法 

分 类 号：TG453.9[金属学及工艺—焊接] TG438.2