Welding Definition and 66 Threads

I put my tea in the microwave this morning then went to sit on the sofa. I heard some crackling noises, similar to the sound that metal makes when in a microwave. I ran over, and hit stop then opened the microwave. The microwave tray was over to one side. I took the mug off but the tray...

when someone welds , why does it emit blue light , is it because of the ntirogen in the air.

I am thinking about taking courses about welding later this year. I want to prepare in advance. Do you know any accesible resources about welding? Especially things which explain the fundamentals. I look for solid hard information which will help me later. I want to understand the advantages and...

Hello, I know AC is used for welding of Aluminum or materials that have oxide layer on the surface Books also tell me that the oxide layer is cleaned by AC However, what is the exact mechanism of this cleaning action? Besides, where does the oxide gone? Vaporized? Dissolved? Thanks

Just a quick question from a potential mech. engineering student. I'm probably going to start soon on my formal MechE classes soon but I know that to be a good engineer, you need to do more than get good grades. I've asked a lot of working MechEs about what you need to know, specifically if...

Hi all. As part of a Uni project I need to calculate the torque required to rotate one pipe relative to another stationary pipe so the two ends of the pipes are in contact with each other and therefore the rotation and the axial force of the rotation pipe causes friction and melt. I know at...

Hello, I arrived here following links to "heat exchange". I've got a small (200amp) tig welder and would like to move up to a water cooled torch. I'm building my own cooler in my workshop. I'm challenging myself to fit a cooler into the smallest package possible, the only limits being my...

by cold welding i mean diffusion bonding, explosive welding, cold pressure welding etc. in what situations would one use these techniques and what are the benefits of employing them over traditional methods such as arc welding?

Hi, I want to know the peak temperature attained and temperature distribution with time in a frictional welding process ( ultrasonic consolidation between an Al substrate and Al strip). The problem with normal thermocouples is that by the time it shows the temperature , the temperature has...

This is kinda hard to explain without a drawing but I'll try. Imagine an L-shaped structure with a weld going down the vertical part connecting the L to a vertical pipe on the left side of the L. The curvature of the pipe is insignificant. Then on the L's right end is a vertical downward load. I...

In a welding process,i am welding two plates. The welding current is 110A and welding voltage is 20V. Suppose 100% of this electric energy is converted to heat then the heat energy generated is 110x20. i.e., 2.2KJ/sec. Suppose the length of the plate is 2 metres, How can i calculate what is...

I have time on my hands these days so I bought a Mig/flux welder. I have no idea what I’ll do with it but I always wanted one. The machine allows welding with wire that has a flux core or with a gas “shield. Presumably the gas or flux prevents oxidation of the metal when heated. The...

Dear . . . Physics Forum May I Ask Some Help ? I need a website that makes me learn more about : 1. Arc Welding Machines . 2. Arc Welding Technology . 3. Welding Rodes Specifications . 4. The Calculations That We Need For How Deciding The Welding Rode Diameter Depending On The Working...

May I Ask This Question ... Please ... There is many sizes of Arc Welding Wires ... ( 1.5 ) , ( 2 ) , ( 2.5 ) ... etc. On what depend exactly the use of each size ... ? There is also on the Welding Machines a Volatge Controller ... for increasing or decreasing the welding voltage ...

I do not know how to do the second part of this question. I never learned this. A laser used to weld detached retinas puts out pulses of 640 nm light, 25 ms long, which average 0.50 W output during a pulse. i) how much energy can be deposited pre pulse? ii) If the energy of a light...

If I'm understanding it correctly, my book says that frictional forces are the result of cold welds - that when two surfaces are in contact with one another, the highest points on the surfaces on an atomic scale weld together to form a single object, and these welds are what resists movement...