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Welding and Cutting

Parent Category: Machinery and Tools
The welding and cutting category covers the various types of welding (arc, mig, tig) and the carious electrodes used for welding various metals. There are also questions regarding tips on various problems experienced by welders. Cutting is also a part of a welder's job and it too has many aspects.

Subcategories

The Type of welding you are doing, the brightness of the arch.
  Please check out the Related Link below for info on underwater welding. Someone went to a great deal of trouble to write the article, and it should answer just about any questions you might have. ;-)   http://en.wikipedia.org/wiki/Underwater_welding
I am not aware of anyone using that method on industrial scale
They can be depending on the material you are welding. Most hot plate welders have a ventilation system that will evacuate fumes from the inside of the welder. This greatly reduces the risk to the operator.
Because of medium melting point , medium linear coefficient of thermal expansion and medium thermal conductivity.
by welding we add some filler material which will fill the gap  between the joint.
  == Answer ==     The existing 4 wires meaning Red, Black, White, Bare? Red and black are "hot" (using 120V from each phase of your service entrance), white is neutral, and bare is ground.   == Answer ==   Ground the bare or green wire to the electrical box then use red and black...
its better to see a video of welding to visualize it.
Spot welding is known as resistance welding because the the two pieces of metal melt together at the point of highest resistance to current flow, basically when the electricity flows through the pieces it heats up at the point of highest resistance that is where where the metal pieces touch and in a...
Because if you do it right it looks like a string of beads.
  TIG uses tungsten in a gun and electricity to melt the material, the user must manually add filler rod. Needs shielding gas   Mig uses a gun, but the filler rod flows out of the gun. Electricity flows from tip of wire into material. needs shielding gas except with flux-cored wire.   SMAW...
depending on the thickness of steel you have to change your amperage.... i like to work with 120 or higher with 1"1/2 angle iron   The thump rule for any welding rod current selection is as follows:   Current = Core wire Dia of the Electrode X 40   Example (4mm X 40 = 160 Amps )  ...
what causes saturation in welding machine
arc welding such as SMAW (stick), GMAW (mig). Some cast metals may be brazed for certain applications. The actual properties of the Cast metal will be needed for the type of electrode and/or process.
Manual Metal Arc Welding(MMAW) Also GTAW (TIG) and GMAW (MIG) The MIG wire carries electric current so it is considered the electrode. TIG the Tungsten is considered an electrode.
The helmet holds the lens. Lenses come in different shades (darkness). Use the correct shade. Most welding applications call for a shade #10. TIG weldors usually use a shade #9. Plasma applications can call for a shade #11.
you shouldn't have to weld on a good gooseneck hitch. a good gooseneck is a bolt on accessory. check out the B&W turnover ball website http://www.turnoverball.com/
Rapid oxidation (rust) occurs when oxygen, in the surrounding air, is allowed to reach the molten pool. Time does not factor into the equation. Most welding processes utilize a medium to protect the weld puddle until it solidifies. An inert gas ( ie: argon, helium, CO2) and or a liquid material...
Tig, or tungsten inert gas welding used to be known as Heliarc welding when it was first developed in 1941, because helium was then used as the inert gas. As the process has developed and progressed the name was changed to Tungsten Inert Gas welding. Argon or a combination including argon is now...
Filling pass is a welding process which function to filling filler  metal inside welding groove before capping process be execute
This is a term used in MIG (metal-inert-gas) welding. When you pull the trigger to weld, wire travels out of the nozzle, strikes the workpiece, and starts the welding current. The further away you hold the gun, the further the wire 'sticks out' before it touches the workpiece. The amount of stickout...
Shielded welding needs a gas to shield the weld from the atmoshere air. Unshielded uses a flux the burns when welding to shield the weld from the atmoshere air.
Purpose of a pressure regulator is to match the flow of gas through the regulator to the demand of gas placed upon the system. It is a valve that can automatically cut off the fluid of a liquid at a certain pressure.
You can check Google Images for an example, or you can do a search for Pin Up Girls or maybe even Vintage War Time poster since the type of pin up your looking for sounds like it may be a recruting poster of some kind. Check the related links and see if you can find what your looking for.
Seam welding- resistance welding process involving the use of (normally) copper or copper alloy rollers to simultaneously pass high current (10^4 amps and usually in pulses) and apply pressure to bond a lap seam between two pieces of sheet metal.Percussion Welding- arc welding process involving the...
Stitch welding, also known as a Staggard welding, is the process of welding to base materials in many short sections. This process gives a weld less strength, but usually keeps the material from warping too much since you use half as much heat. When strength is critical, full penetration welds may...
under water welding or over seas
Most I A programs only give you a sample of different trades. A lot of schools offer Vocational programs where you receive training in a specific field ie: welding, carpentry, machine shop etc. Some are at the secondary level (high school) some are at the post secondary level (Voc Tech schools)...
when you take a electrode with no shielding to make a weld
A welding position is the orientation of the weld joint, whether that be flat, horizontal, vertical, or overhead.
I just retired from the united associations pipe fitters of America. I was a welder in that union for 44 years. All you need to do in look in your phone book under trade unions for plumbers and pipe fitters. You say I dont want to be one of those guys I want to weld. A welder gas or electric is a...
welding current for 2mm thick. ms plate
yes Electrode Positive is the same as Reverse Polarity
yes doing it for 24 years now from Fiji living now in Melbourne Australia. Have got class 1 certificate for welding and fabrication been using 6 meter Guillotine.
I am currently running a subarc in Alberta, Canada. I make $23 an hour, but I assume the wage would vary.
It's joining two pieces of metal together, either by adding a 3rd molten metal at the joint, or by melting the metals themselves until they fuse together.Do note that there are a few similar methods for joining metals called brazing and soldering. What's what is determined by which temperature the...
Fredrick M Bowers 1915
Welding is joining two pieces of the same type metal, usually steel or an alloy of steel with a rod of similar type metal. This can be done with gas, an arc welder or a wire feed welder. Welding is done on Ferrous or Iron based metal. Soldering is for Non Ferrous or copper based things, copper and...
None. You will have a product that does not conform to specs. , will be difficult to match quality and affordability of products that are readily available...
I would use a wire feed MIG, or a oxy-fuel torch. If arc welding, use a low power. It's really easy to burn through exhaust pipes and mufflers.
reverse polarity and straight polarityThe answer is right but a bit of furthur explanation is required. Polarity can be changed in DC output welding sets. The heat of the welding arc is concentrated on the positive terminal. So when thick plates are welded as more concentration of heat is required...
Depends on how wide a weld deposit you want and how thick the metal is. Short blunt points distribute a wide arc and are used on thick materials. A fine point concentrates the heat and is used on thin metal. You will develope your own techniques. Aluminum welding usually employs pure tungsten and...
Laser cutting machines cut through a large variety of materials, but there are several laser technologies. CO2 laser can cut organic materials like wood, paper, cardboard, fabric, acrylics and plastics.
Yes, resistance welding is used in production welding. It is used extensively in the automotive industry.
TIG (Tungsten Inert Gas, or GTAW) welding at the link below. I don't know about others, but this is one I saw in class
  == Answer ==   An Associate's in Applied Technology (AAT) is the same thing as an Associate's in Applied Science (AAS). To get an AAT, you must choose a major to study. About 15 of the classes for the AAT will be classes related to your major, and about 5 classes will be general education...
It stands for electrode. As opposed to R ( rod) for gas welding or TIG welding. If it carries electrical current it is an electrode.
40 years in the trade and never heard of it. Maybe you are thinking of thermite? If so ask again.
6010 is a high cellulose sodium based electrode, which can be used to weld carbon steel pipes.
n - Oxygen and Acetylene are the original gasses that are used for welding/cutting. Newer mixtures are slowly replacing Acetylene as a fuel. These gasses don't always reach the temperatures attained by Acetylene. Us old-timers still prefer Acetylene.
A proper weld is produced as the rod is moved across the material, and the flame at the end of the rod cuts a path in the material and that path is refilled by the material of the rod. It flows back into the cut out filling it and joining the materials.If the welder is too hot, or the persons...
in this arc is formed between the tungsten electrodes and the welding job in an atmospher of an inert gas and a separet filler rod is used to add the filler metal.
This isn't a very in-depth explanation, but it seems like the primary difference is that welding is the act of welding, forming two pieces of melting together, whereas weld-ability is the ability for metal to be welded (thanks, Webster, I know).Weld-ability involves the potential for weld defects,...
Defects can be varied and classified as critical or non critical. Porosity (bubbles) in the weld are usually acceptable to a certain degree. Slag inclusions, undercut, and cracks are usually non acceptable. Some porosity, cracks, and slag inclusions are visible and may not need further inspection to...
Verticle down welding will always have lower penetration and less heat applied to the weld joint. As sheet metal is thinner and can not take excessive heat, verticle down reduces burn-through.
Your question is incomplete. Which process? Which electrode? What is the basemetal, which position? etc etc
for arc welding it is electrode made of steel which has high strength than the base metal coated with flux.
First, Butt-weld is short for a butt groove. Welding in a butt-groove starts at the throat of the butt-groove. The first weld point could be a tack-weld: holding the two materials to be welded together. The throat is measured and filler metal and electrode are determined to create the root pass.
It depends on what type of process you are doing, but the average  time from the root pass to the hot pass is about 5 to 10 minutes.
  Cost of Welding machine   Welding machine amperage & power rating   Cost of power/KW   Cost of labour/shift   Machine Utilisation factor   Cost of Electrodes   and % Efficiency
no i found only one point 7018(low Hyde) pls clearly it
1 Increase travel speed 2 lower amperage setting.
  most problems in welding are caused my the welding puddle being contaminated in some way. Lack of shielding gas (empty tank, of wind blowing it away) lets oxygen into puddle. Dirty material (rust, paint oil) allow the contaminants into the puddle, which in turn can cause the weld to distort or...
have a 92 sunrunner , passenger door main frame the two nut came though it, how can i weld them back in
I am not aware of a cast iron rod for oxy acetylene welding, I am for arc welding, For cast, I use a brazing rod, a brass or copper alloy, but what do I know. If there is a cast rod available, it would be the same process, get the cast you are welding hot almost to the point of melting, bring in the...
Partial Penetration Weldments could be tested using Ultrasound  Testing method. It should not be used to evaluate the intergrity of  the weld but could be used to detect the root penetration and the  depth.    Godfrey Tisseverasinghe
Shielded Metal Arc Welding, commonly called Stick welding. A shielded electrode passes a current between itself and the workpiece. Both the base-metal and the electrode are melted by the current and the electrode is consumed and deposited into the melted puddle forming the weldment.
Every welder ought to have many clamps! C-clamps, vice grips, wide mouth vice grips (snap clamps) and bar clamps; a nice dead blow (metal mallet covered in rubber,) wire brush to clean welding area before and after weld, good grinder to grind down a finished weld. Also setup blocks, but that's only...
== ==   95% Argon 5% CO2 is most commonly used for spray MIG.
The amount of current (amps) is controlled by the user. It's done with a variable resistor. Another thing to note is whether you are welding constant current or constant voltage. If you are welding constant current, the voltage will vary and a set Amp measure will remain constant. With constant...
The crown of the weld is the material of the filler metal that  projects above the surface of the parts being joined by the weld.
The three common welding processes are oxyfuel welding, arc welding, and resistance welding.
This is a simple stress relieving process the welder can do to minimize warpage of material that was just welded.
In Pressure Welding the parts(work pieces) to be joined are heated only up to the plastic state and then fused together by applying the external pressure.the two different types of pressure welding are:forge welding and resistance welding
ADVANTAGES AND DISADVANTAGES OF MIG WELDINGa ADVANTAGES1) Higher welding speeds2) Greater deposition rates3) Less post welding cleaning (e.g. no slag to chip off weld)4) Better weld pool visibility5) No stub end losses or wasted man hours caused by changing electrodes6) Low skill factor required to...
  The pipe must be fixed (not rolled) in the horizontal position. With the pipe horizontal, the weld is vertical. The pipe being fixed requires the welder to weld flat (top), vertical (sides), and overhead (bottom).   The pipe must be fixed (not rolled) in the horizontal position. With the...
The life expectancy of a welder is their exsperince, faith & way of life. No job takes life faster than others, god determines this only. You can be the safest welder in the world but, a tree could still be blown by the wind which falls right on the safest!
Spot welding uses a heavy current to do the job. Welds two or more layers of metal together quickly without heating the whole piece of metal. The body of a car is full of spot welds that if you had to use an arc or wire feed to do it would warp the panels.
The current flows through the electrode and to the clamp. That's how it flows in MIG, stick, flux cored. On Tig, the electricity flows through the electrode also except that now that's the only function of it, the rod is held in your hand and electrode in the other.
  when refering to tig welding, tig stands for Tunsten Insert Gas
I read plans on all projects so I can follow whatever instructions/specifications asked.
  Arc welding has many preferable qualities in welding such as:   Faster weld speeds (obvious economics).   Less distortion from thermal expansion/contraction.   Addition of alloying elements in the electrode flux or coating.   Higher weld qualities since scavenging agents can be...
The answer key for the Blueprint Reading For Welders 8th Edition  can be found here:  http://www.excelhonour.org/blueprint-reading-for-welders-answer-key/.  All of the answers are on this website and can either be read  online or downloaded.
E7018---- I'm adding this to the answer. Never having welded rail I have seen a video of one process. It is called Thermite Welding. A mold or dam is built around the joint where rail ends meet. A mixture of Aluminum Oxide and iron powder is poured into the mold and ignited. The mixture burns at a...
yes but a 3.2 will add value..however this is certification to british standards an american standard cert like aws-cwi should also be considered...
The current requirement while welding with 3.2 mm size electrode varies with wether it is root pass or second or capping pass. As for root pass value of current will be () and for 2nd or capping pass its value will be ().
No .you can use E7018 electrode on all position including uphill welding.
You should not weld on concrete, as it can explode if heated
0.1mm to 25.4 (1 inch) can be welded depends on the type of laser welding ( CO2 r YAG).