|D/F Water-Cooled Robotic TIG Torch|
D/F Water-Cooled Robotic TIG Torch
The TM500-B TIG Bottom Load Machine Barrel incorporates the same design as previously described (TM500) but is a bottom load type barrel for robotic applications. Tungsten electrodes are fastened by a collet action nut. A unique feature of this water-cooled TIG barrel is that the nozzle assembly water chamber and inner body water chamber are serially connected to each other, thus completely eliminating the need for gaskets or o-rings in the water passage system. Maximum current rating with thoriated tungsten electrodes is 500 amperes DC straight polarity, and 300 amperes AC. High frequency may be superimposed over standard current on a continuous or intermittent basis. There are five (5) collets available for use with this machine barrel with sizes of .040”, 1/16”, 3/32”, 1/8”, and 5/32”. The singular collet design provides clamping pressure when the collet is securely fastened on the tungsten.
The TM500-B Machine Torch Series features a heavy-duty 500 amp water-cooled power cable. This water-cooled automated TIG barrel has the unique feature of the nozzle assembly water passages being serially connected to the inner body water chamber by means of sliding removable connectors. This allows ease of maintenance and eliminates the use of o-rings or gaskets in the water passage system.
D/F Nozzles (also called gas cups) provide a given amount of shielding gas coverage to the weld pool, according to their size (anywhere from 1/4- to 5/8-inch ID). For example, a smaller nozzle provides less gas coverage than a larger one. Nozzles also vary in price and performance. Built-in gas lens/gas difussor improves gas coverage to eliminate shielding gas turbulence and improve weld quality (all models). The TM500-B Front Load TIG Torch is available in 10.25" barrel lengths to meet exact welding requirements on precise mechanized jobs. Front tungsten loading/tightening eases tungsten changeover and extension adjustments.
The most cost effective are 90 or 95 percent alumina oxide nozzles, which work adequately for lower amperage applications. These nozzles, however, do not resist thermal shock on higher amperage applications very well and tend to deteriorate or crack and fall off.
Lava nozzles cost more than alumina oxide nozzles and are more resistant to cracking. These nozzles work well on medium to high amperage applications.
The bottom line when choosing TIG consumables is to look for factory OEM parts that provide you with the durability and performance you need. A wide variety of options exist for back caps, collets and collet bodies, gas lenses and nozzles, all of which offer distinct advantages, disadvantages and cost considerations. For less critical applications, the less expensive alumina nozzles provide adequate performance. However, if you need high performance, it is well worth your while to purchase more expensive, long-lasting lava nozzles or cups. Doing so minimizes the chance of consumable failures that could ultimately increase the cost for rework associated with weld inconsistencies.