Combined measurement of arc current and arc force based on the split anode method

The distribution characteristic of the arc current density and arc pressure has an important effect on the welding process.Based on the split anode method,a combined measurement system of arc current and arc force was developed,including accurate motion control of the arc and the high-precision data acquisition system.The distribution characteristic of the arc current density and arc pressure was obtained by using MATLAB for data processing and numerical analysis.Both of the experiments of DC plasma arc welding and DC TIG arc welding were completed,and the results demonstrate that the combined measurement system has high accuracy and stability,and can provide foundational data to study arc shape and pool form.