Welding Definition and 70 Threads

What are the factors considered while calculating clamping force requirement ? Clamping force for welding based on thickness - 48*s^3 s- thickness what are other factors considered along with thickness and i need a detail source/reference books?

Hello. I work for a company and I need your help! The pipe is welded to the wall. However, the worker applied force to the right with the force of F, and the welding was cracked. As a countermeasure, welding is carried out in two layers as shown in the picture on the right. In this case, is it...

I've watched a couple of DIY videos and one of them talked about TACK-welding. I'm a little overwhelmed with how many welding types there seem to be. Oxyacetylene welding equipment seems to be the cheapest, but which one of them all is the most versatile / useful in most cases? Also, which one...

No Idea what I am expected to disclose here????

Recently I found these notes with recommendations for welded joints and something is not sitting right with me. It's in Spanish but I'll translate it as close to technical English as I can. I have checked a few sources on the internet and they all say basically the same thing. I couldn't find...

Hello All, I'm trying to figure out how to strengthen a box beam that's been welded to another box beam. In the photo on the left is 2 beams welded to each other, they are 2x1" Aluminum 6061-T6, with a 1/8" wall thickness. The yellow lines indicate the location of the weld. A force of 216 lbs is...

What are standard quantitative measurements of wringability? What is the quantitative limit between wringing and cold welding? What are the basic reasons of weakness at wringing/cold welding fault?

How is it possible for a welding machine to end up creating more power than what it started with if that is physically impossible? For ex; 200 amp @ 28vdc welding machine. starts out with main voltage being 120v @ 20amps = 2400 watts then converts it to 200 amps at 28vdc which = 5,600 watts of...

Hello all, I am curious as to whether it is possible to create aluminium from a thermite reaction. Thermite, as standard, uses aluminium and iron oxide, which react together when burnt to create a blob of molten iron. I would like to achieve a similar result, but with a blob of molten...

Good day. I'm currently in the soldering phase of an RF circuit designed to operate an L293D motor chip. On the breadboard I managed to get it to work, but after soldering (and checking for shorts) I am not getting proper high/low signals sent through the encoder/decoder from 2 2p2t switches to...

I've read that when two pieces of the same kind of metal touch in space, they will fuse because there is no way for the electrons to "know" that they are in different pieces of metal. What would happen if two different metals were to touch in space? Would electrons still flow freely between...

Does anyone know of an etching solution suitable for aluminium and its alloys that does not contain hydrofluoric acid?

I'm exploring Ultrasonic Welding as an alternative to solvent welding of some polycarbonate parts...looking for someone with some knowledge in this arena. I'm very familiar with solvent welding acrylic, but PC is giving me troubles. Anyone willing to help me out?

Hello, Does anybody know how to compute shear and normal stresses which take place due to applied load? My case is a simply supported beam (120x120x6.5 length: 4.2m) reinforced by a plate (20x120 length: 2m). Plate is welded on a top of a beam and external force (F=15 kN) is applied to the...

I am doing a project that relates to welding acrylic. I got the bottle today, and I can't use it because its flammable and has chemicals known by the state of California to cause cancer (makes you wonder why the hell they would market this crap). Are there any clean, non-flammable, and...

Dear all, I've one question about fillet weld. Ex. i have T-joint with both plate are 10mm thickness. if i want weld around on leg of plate, so which symbol can i choose on both case below? 1. Both side of arrow is triangular and no around symbol. 2. only side of arrow is triangular and...

Hi guys, My name is Rogelio H. Aguirre, a grad student from the University of Waterloo working on MEMS sensors. Currently, I am working with micro laser welding suppliers to fabricate the packaging of a pressure and a temperature sensor. I have some experience on weldings, but not in micro...

What are the applications and advantages of Electroslag welding (ESW) process ?

Hi I am planning to make a light weight camera mount for my RC multicopter (drone). Issue is due to irregular shape of the camera, need for the mount to be light weight, and setting up a small angle of inclination (5-10 degrees) the only solution I have come up with is to use light weight thin...

What would be the possible options to join Titanium Heat Exchanger tubes to a PTFE / Teflon tubesheet? These are 38 mm tubes, 2 mm thick. 6 m total length. Seamless tubes. Is this a reasonable design decision? Full titanium tubesheet would be excessively expensive & isn't needed since only...

Homework Statement A welder using a tank of volume 7.40×10−2m3 fills it with oxygen (with a molar mass of 32.0g/mol ) at a gauge pressure of 3.20×105Pa and temperature of 38.7∘C. The tank has a small leak, and in time some of the oxygen leaks out. On a day when the temperature is 22.9∘C, the...

I am looking all over and can't find the standard for the welding pipe with fittings into '4-'12 pipe array, by standard i mean the welding type, pipe\fitting preparation and any other Info\tips that can help.

Hello all, I am M.Tech student and doing my dissertation on friction stir welding stimulation in ANSYS Mechanical APDL. I need to simulate residual stresses induced during welding using ANSYS. How can I do the same, please reply. I am a beginner in ANSYS. I don't have much knowledge of ANSYS

Can someone explain the process?

Hey folks great forum here! Anyone here have a good reference for structural weld analysis technique? I am not looking for code requirements but a general techniques and knockdown factors for aluminum welding. thanks Dan

I'm familiar with the process of friction stir welding, which has been used with great success for assembling the fuel tanks for satellite launchers like the Delta IV and the Atlas V. However, I was wondering if, from a theoretical aspect, it would be possible to friction stir weld together...

Hi everyone, In a current project, I'm curious about the risk of silicone tube cold welding when used with a solenoid pinch valve, such as = http://cfnewsads.thomasnet.com/images/large/454/454667.jpg What is the likelihood silicone tube will cold weld at the pinch point, if the pressure is...

Homework Statement Lightweight bicycle had been fabricated from aluminium alloy tubing, with joints made by adhesive bonding. When the frame fractured near one of the joints, the owner requested that a repair be made using conventional gas tungsten arc welding. Shortly thereafter, the frame...

Hi, Why the fire doesn't burn back to gas tank as there is a continuous stream of fuel from the fire to fuel tank? Thanks

I have a small Lexan 141 dome I snap into a large piece of polycarbonate-ABS: I'd prefer to adhere with some other method, are any of you materials guys familiar in welding technologies? Would something like ultrasonic or vibration welding be a possibility for me?

http://img560.imageshack.us/img560/2662/nobending.jpg This exercise is from machine parts. In order to find the width of the weld, I calculate the shear force and bending moment for this exercise. However, according to my teacher, there is no bending here and I calculate this exercise for...

Homework Statement The depicted construct is made of a rod with a square cross-section and two plates. The plates are jointed together through 4 similar rivets. The square rod is welded to the wall at "B" and to the plates at the other end through peripheral corner welds. On the board acts an...

in welding operation , you never hit by electric shock,why?

Hello, first of all I apologize if there is already a topic with this solution but this is my first time here, and I'm a little lost :frown: I'm developing a work which consists in the determination of residual stresses due to TIG welding. I have developed the model and ran a successful...

Hi, I want to do a very simplified model to try to modelize the change of temperature in ultrasonic welding of polimers. As a starting point, I only want to simulate the change of temperature of a 1D homogeneous polymer (viscoelastic solid) when I apply a constant pressure and ultrasounds...

I have an arc welding plant and I realized that I am wasting energy when it is not used but powered on. Can anyone please suggest a way to get rid of this problem? That is, plant gets "active" when it is welding and is "idling" when it is not welding.

I am looking to make a training equipment where the legs and the bases could be assembled and disassembled easily Using bolts is one option, but I am looking for a quicker option where the user just slides the base into the foot and start using the equipment. having the foot and base...

Hi guys. As a mechanical engineering final year student, I was assigned to design and build a cold welding prototype to weld just two sheets of metal together by lap joint. Before I actually start the designing process, I tried to cold weld the two sheet metals together by using simple methods...

Hello again PF I am trying to find the failure load for a 6061-T6 Aluminum forklift pocket weld with 4043 filler. Can I simply multiply the cumulative throat area by the ultimate yield strength of the filler for this value? I never had any formal education on welds, wasn't sure if I'm missing...

Common Temperature ranges from a welding arc can range from 3000-8000 Degrees Celsius. I would like to know the direct relationship of a resultant arc temperature based on the amount of current (amps) flowing. Let's say common steel for the base metal (Electrical Resistivity: 1.74e-005...

"Cold welding" question My husband posed an interesting question to me that I can't rightly answer, not being any kind of expert, when I told him about the fact that metals fuse if they come into contact with one another in space. If an asteroid collides with another asteroid, will the two...

Is it possible to turn my 20 square foot welding table into an elctromagnet? I weld steel cut nails into artwork. The nails lay flat on the steel table, but the welding process sometimes "shifts" the nail out of position during the spot weld. This error causes the process to be shut down, and...

Dear all, i need help in finding out the terms below. Tried goggle it but fail to really understand them. Anyone can help? thanks! 1. Undercooling in welds 2. Quick solidification 3. Martensite, austenite, pearlite, ferrite phase for steels 4. Phase diagram for steels 5. Difference...

I built a welder using Microwave oven transformers, but I keep melting the secondary coil, and they are a pain to rewrap. So I was thinking about building a transformer from scratch using available materials. My first obstacle is the core material, I know laminated core material is...

Are welding glasses safe to view an eclipse with? We will have a partial solar eclipse tomorrow and I'd like to show my daughter. I have welding glasses and wonder if that is safe. I will also prepare a pinhole-and-screen device to show her the eclipse, but I'd like to let her view through the...

Hi all, I'm trying to learn to do some basic calculations for welding, and I've been given the task in regards to finding out the weld sizes required for the loads being applied. I've got a 1.2m wide staircase, with 6 stairs, attaching to two angular beams on the outside. They will be...

Hello. I am am trying to find out why Hastelloy cracks during laser welding. What techniques are used to lessen the cracks etc. The main focus is to learn as much as I can about laser welding this material and what laser setting to start with . A simple google search has gotten me no where and...

I have to ask this...I work at the seashore trolley museum in kennebunkport Maine as a restoration welder/fabricator. I work with old trolleys and old steel from 1907 to the 1950's and they all tell a story. I don't know how to put this to words but let me give it a try. What happens when you...

Hey guys this might be a question better suited for the Materials Engineering section but I'm not sure how much they deal with welding. Anyway I am trying to figure out how much the heat from a typical welding process would effect a steel's yield strength. I understand that on a cold worked...

Hello, I'm a complete laymen as far as any material science goes (engineering too), but i need Your help please. I have w steel wire rope, 2mm in diameter. i need to know two things: 1) i need to make make a "wire mesh", the simplest plain weave. however, i must make it in such a way...