Abstract
Keyhole plasma arc welding (PAW) is a promising technology for precision joining of metals. To develop an accurate penetration feedback control system, the space charge voltage generated by the efflux plasma was measured to predict the back-side width of the weld pool, which relates to the state of joint penetration. The resultant empirical model showed a linear relationship between the space charge voltage and the back-side width of the weld pool. To design the control system, step-response experiments were done to estimate the transfer function of the welding process. Based on the transfer function, a Pl controller was designed. Experiments verified the effectiveness of the developed penetration control system.
| Original language | English |
|---|---|
| Pages (from-to) | 157s-162s |
| Journal | Welding Journal (Miami, Fla) |
| Volume | 80 |
| Issue number | 7 |
| State | Published - Jul 2001 |
Keywords
- Joint penetration
- Keyhole
- Penetration control
- Plasma arc
- Sensor
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys