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METAL TRANSFER IN CO2 WELDINGIn CO2 welding, two distinct types of metal transfers are identified viz. short circuiting transfer and free flight globular transfer.Short Circuit Transfer: When the welding voltage and the current are low, the mode of metal transfer would be of short circuiting type. In short circuiting mode, metal transfer occurs from tip of the wire electrode to the job whenever the wire tip touches the weld pool. The arc is extinguished during the short circuit period and is re-ignited after the short circuit is cleared. Short circuiting transfer is used for joining thin sheets, welding out of position and root pass welding of tubes and pipes.Free Flight Transfer: When the arc voltage and current are high, the metal droplets are transferred non axially as large globules and this is called non axial free flight transfer. The non axial free flight transfer produces deep penetration. Hence, this mode of transfer is used for welding thick sections in down hand and horizontal positions.
Q. Explain about Master Stick File? The Master Stick File is an up-to-date version of the P&IDs; it is not to be used as a check print by any discipline. Miscellaneous comment
design criteria for chain drives
velocity of belt: velocity of belt passing over the driver pulley will decrease Now with this velocity belt pass over driven pulley, Now Velocity of Driven = Velocity
Battery Electrolyte and Gases Battery emits explosive gases, keep sparks and flames away. Ensure adequate ventilation while charging the battery. Brake Fluid Spilling
uses of parallelogram
Consider radar with a PRF of 5 kHz. What is the maximum unambiguous range R ua of this radar, in km? If a target is located at a range of 50 miles, how many pulses will the r
Determine the enhance in volume of the vessel: A thin spherical vessel of diameter 800 mm and thickness 6 mm is filled through a liquid at an internal pressure of 1.5 N/mm 2 .
Inspection of Electrical Equipment STEPS All electrical equipment are checked for proper functioning. The starting and lighting of the motorcycle should be prope
Find out the velocity of the system: Blocks A and B of mass 20 kg and 45 kg, respectively are associated by a weightless rope over a frictionless pulley as shown in Figure a).
1. Produce the SW parts for the lugs, connector and tubes. Produce an assembly to FIT at the designated points. 2. Create your own, individual, blank, customised drawing te
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