High-speed plasma arc cutting technology plasma engineering hot metal cutting, and partial melting with high flow will also be the molten metal blow, form a narrow incision.

Plasma arc cutting is a physical process which utilize high temperature to heat materials and high speed flow to blow melted metal, cutting quality is directly influenced by arc power and arc force.

According to the change pattern of some parameters in metal cutting processes, this paper proposes for the first time a new time series analysis model-Autoregressive Constant model ARC (2).