Hello You can post realistic images for welded pieces with defects inspected by the five tests. For example, images for external welding defects inspected by VT. And pictures of the screen of the RT equipment shows the shape of the wave and what you mean
Actually constant current process is SMAW and GTAW right? And constant voltage is GMAW/FCAW AND SAW WILL BE CONSTANT VOLTAGE TILL 1000A and above 1000A it will be constant current. I Am sure about things since I have studied this during my CSWIP 3.1 CLASSES and already I am seeing this at site as well
please check this below link.. Effect of molybdenum and cerium on the solidification www.researchgate.net/publication/296957512_Effect_of_molybdenum_and_cerium_on_the_solidification_of_secondary_Al-Cu-Si_alloys
Power Supply Two types of power sources are used for MIG welding: constant current and constant voltage. 1. Constant Current Power Supply With this type, the welding current is established by the appropriate setting on the power supply. Arc length (voltage) is controlled by the automatic adjustment of the electrode feed rate. This type of welding is best suited to large diameter electrodes and machine or automatic welding, where very rapid change of electrode feed rate is not required. Most constant current power sources have a drooping volt-ampere output characteristic. However, true constant current machines are available. Constant current power sources are not normally selected for MIG welding because of the control needed for electrode feed speed. The systems are not self-regulating. 2. Constant Voltage Power Supply The arc voltage is established by setting the output voltage on the power supply. The power source will supply the necessary amperage to melt the welding electrode at the rate required to maintain the present voltage or relative arc length. The speed of the electrode drive is used to control the average welding current. This characteristic is generally preferred for the welding of all metals. The use of this type of power supply in conjunction with a constant wire electrode feed results in a self-correcting arc length system. Motor generator or dc rectifier power sources of either type may be used. With a pulsed direct current power supply, the power source pulses the dc output from a low background value to a high peak value. Because the average power is lower, pulsed welding current can be used to weld thinner sections than those that are practical with steady dc spray transfer. Manual And Automatic Welding Guns Welding guns for MIG welding are available for manual manipulation (semiautomatic welding) and for machine or automatic welding. Because the electrode is fed continuously, a welding gun must have a sliding electrical contact to transmit the welding current to the electrode. The gun must also have a gas passage and a nozzle to direct the shielding gas around the arc and the molten weld pool. Cooling is required to remove the heat generated within the gun and radiated from the welding arc and the molten weld metal.
You are alos right, because the questions says any one give example.. So if you tell SMAW.. Also right.. Appreciated and thanks because you check all questions and it will help to you.
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Q-02 main purpose is To prevent oxidation...
Hello You can post realistic images for welded pieces with defects inspected by the five tests. For example, images for external welding defects inspected by VT. And pictures of the screen of the RT equipment shows the shape of the wave and what you mean
OK got it, will upload soon as you said
Actually constant current process is SMAW and GTAW right? And constant voltage is GMAW/FCAW AND SAW WILL BE CONSTANT VOLTAGE TILL 1000A and above 1000A it will be constant current.
I Am sure about things since I have studied this during my CSWIP 3.1 CLASSES and already I am seeing this at site as well
Thanks
Q-06 i think if he qualified on 5G then for plate he can for All position..
Hello sir I have small doubt main elements in solidification cracking is carbon, sulfer , copper,
please check this below link.. Effect of molybdenum and cerium on the solidification www.researchgate.net/publication/296957512_Effect_of_molybdenum_and_cerium_on_the_solidification_of_secondary_Al-Cu-Si_alloys
Tq sir in question 20 mig, mag welding uses constant voltage process
Power Supply
Two types of power sources are used for MIG welding: constant current and constant voltage.
1. Constant Current Power Supply
With this type, the welding current is established by the appropriate setting on the power supply.
Arc length (voltage) is controlled by the automatic adjustment of the electrode feed rate.
This type of welding is best suited to large diameter electrodes and machine or automatic welding, where very rapid change of electrode feed rate is not required.
Most constant current power sources have a drooping volt-ampere output characteristic.
However, true constant current machines are available.
Constant current power sources are not normally selected for MIG welding because of the control needed for electrode feed speed. The systems are not self-regulating.
2. Constant Voltage Power Supply
The arc voltage is established by setting the output voltage on the power supply.
The power source will supply the necessary amperage to melt the welding electrode at the rate required to maintain the present voltage or relative arc length.
The speed of the electrode drive is used to control the average welding current.
This characteristic is generally preferred for the welding of all metals.
The use of this type of power supply in conjunction with a constant wire electrode feed results in a self-correcting arc length system.
Motor generator or dc rectifier power sources of either type may be used.
With a pulsed direct current power supply, the power source pulses the dc output from a low background value to a high peak value.
Because the average power is lower, pulsed welding current can be used to weld thinner sections than those that are practical with steady dc spray transfer.
Manual And Automatic Welding Guns
Welding guns for MIG welding are available for manual manipulation (semiautomatic welding) and for machine or automatic welding.
Because the electrode is fed continuously, a welding gun must have a sliding electrical contact to transmit the welding current to the electrode.
The gun must also have a gas passage and a nozzle to direct the shielding gas around the arc and the molten weld pool.
Cooling is required to remove the heat generated within the gun and radiated from the welding arc and the molten weld metal.
Tq sir
Thank you so much
welcome ...
I have an doubt why we didn't take MMA process for qno. 20 can you explain plzz
You are alos right, because the questions says any one give example.. So if you tell SMAW.. Also right.. Appreciated and thanks because you check all questions and it will help to you.
Hi Sir, can you make videos of pipe fitup inspections for TKY joints with wps
Thanks for your comment , i will try to make one video on this ...
Question 6 welder is qualified flat vertical overhead?
plz give ans only no need explain bro