Cnc Programming

Process Characteristics Of Plasma Arc Machining

Plasma is defined as a gas that has been heated to a sufficiently high temperature to become partially ionized and therefore electrically conductive. The process employs two inert gases one forms the arc plasma and the second shields the arc plasma.

Chapter22

Plasma Arc Machining Electricity Electromagnetism

Mechstuff4u For Mechanical Engineers Plasma Arc Machining

The plasma arc welding and cutting process was invented by robert m.

Process characteristics of plasma arc machining. Meaning of plasma arc machining pam. Introduction the plasma arc machining process was introduced to the industries in 1964 as a method of bringing better control to the arc welding process in lower current ranges. Plasma arc machining pam employs a high velocity jet of high temperature gas to melt and displace material in its path. Plasma arc machining pam plasma arc machining is a nontraditional thermal process. The plasma jet cutting is similar to keyhole mode of plasma welding except that unlike welding the keyhole is not allowed to close behind the plasma arc. Filler metal may or may not be added. When a flowing gas is heated to a sufficiently high temperature of the order of 165000c to become partially ionised it is known as plasma. In the whole process high temperature conditions are required. Gage in 1953 and patented in 1957. In this process heat for machining is produced by convection from the high temperature plasma as well as due to direct electron bombardment. The ss321 has a wide range of applications such as in chemical storage exhaust manifolds of automotives and aircraft. Plasma cutting is a process that cuts through electrically conductive materials by means of an accelerated jet of hot plasmatypical materials cut with a plasma torch include steel stainless steel aluminum brass and copper although other conductive metals may be cut as wellplasma cutting is often used in fabrication shops automotive repair and restoration industrial construction and. The intricate shapes for this material are very difficult to cut using conventional machining process. Plasma cutting is the fastest cutting process on carbon steel aluminum or stainless steel. Now this plasma is targeted towards the workpiece with a high velocity and the machining process starts.

The term plasma as employed in physics means ionized particles. One thing to note down is that a high potential difference is applied in order to get the plasma state. In this part of the series the process fundamentals are described with emphasis being placed on the operating features and the advantages of the many process variants. Today plasma retains the original advantages. Hence plasma arc cutting is used. In plasma arc cutting pac process the metal is cut by melting a localized area with the constricted arc and removing the molten material with a high velocity hot ionised gas called plasma jet. That means we get the plasma state that we wanted for plasma arc machining. Plasma cutting can be combined with waterjet or oxy fuel on the same part. The plasma arc cutting process is illustrated in fig. Plasma cutting can be use for precision cutting on gauge material up to 6 thick stainless. This work investigates the cut quality characteristics of ss321 using plasma arc cutting. The plasma arc process has always been seen as an alternative to the oxy fuel process.

Plasma Arc Machining