Plasma cutting had its beginning with industries substituting age old practice of welding with metal on metal. The introduction of the plasma welding into the mainstream mechanical gave an opportunity to work on metal cutting process and to implement and try out another method of clean cutting.
Now metal cutters can be substituted with plasma cutters. In around the year 1960 more or less, most the changes seemed to have occurred and over the years this has brought about innovation and learning from the experience of designers and machinists at the floor level.
Today CNC (computerized numerical controlling) equipment is substantial clubbed along with plasma cutters and this combined technology works wonders. They provide a great deal of flexibility to ensure the cutting of conduits, metal surfaces and others desired smooth surface results as well as patters on a repeatable basis.
In general, the plasma table is used in the cutting of electrically conductive substances, as such the most preferred older method of cutting through such material would has been metal, in this case a plasma with jet speed acceleration and at a very high temperature is ejected out of the nozzle or gun to cut the end material.
Most often than not a plasma torch cuts through materials that are steel, aluminum, brass or copper, there are other materials too that are cut through a plasma cutting torch on plasma table. The application and use of plasma table is very widespread in the industry. Its usage alongside the CNC technology now makes it both a convenient as well as a easy to use technique, making it as a choice of equipment for cutting in automobile industries, smaller fabrication and automobile repairs and restoration garages. The scrapping and the salvaging operations also use the plasma table, alongside larger uses of the construction industry.
Safety Always First
Any use of the plasma table should at all times be under safety regulations. It should begin with the compulsory use of eye protection and face shields; there should be no compromise to this level of safety. Often arc eye is a resultant of noncompliance to safety measures, and can result in other eye damage due to debris of the cutting tools. Darkness of the shield should be maintained from #7 to #9 and is acceptable range for the use of the equipment.
Methods Of Use
There are at least three major methods to start the arc. In the first method, the torch is put in contact with the work area directly to create the arc, in the second method, the nozzle as cathode and electrode as anode are used to start the arc. When the plasma gas starts to flow, the nozzle is blown forward to the cutting area. The third method is called capacitive discharge and is not used more often.
Plasma cutting torch requires a flat surface for cutting process to be done properly; therefore a suitable table is a must for this glowing torch that cuts through the work. Plasma tables are often of various types; let us consider some that use a metal surface and ones that are of application under water jets.
Types Of Tables
Smaller tables of 110 volt can have options to hold more than one torch and contain flat bar grates to enhance the extra support to the cutting material. Motors and electronics are concealed by design, provision for wheels are another aspect of convenience with the table. Larger table of 220 volt can be used to cut and handle 5’x10’ sheets, these machines are heavy duty and often run on software that can estimate the height and perform large production runs.
In the past, plasma tables were costlier, today they are cheaper and available at affordable price range. The plasma tables that feature inverter technology are lighter, easy to use and energy efficient on. Do read out as much as you can on the chart of a plasma table and choose one that is most suitable for your cutting needs.