Types of Welds and When To Use Them

There are many types of welds, however these can be broken down into several different categories. When we say weld types, this can actually mean two things. First is the style or position the welder would use during the welding process, the next is the type of material that is being welded and of course we have the different processes such as Arc, Mig, Tig and gas welding.

Arc Welding Types of Weld.

If we consider standard arc welding of mild steel, there are four basic positions that can be adopted by the operator, these weld types are determined more by the position the weld is located in and how easy or difficult it is to weld. Here we have the positions of, down hand, overhead, vertical up, and vertical down.

DownHand  Welds

Micro Welding

Micro welding, sometimes reffered to as precision welding has been specifically designed for the welding of small often delicate components. The processes and equipment used require the use of heat energy that is in a tightly controlled environment. The micro welding process sets up the weld by depositing fine blobs of weld to the components to be fused. Often the welding bead is no more than .065 and may even go as small as .005.

As Micro welding is a state of the art process that is used for welding small areas. Often the micro weld requires the surrounding area to be minimally effected by heat, requiring precise heating of the weld to only allow proper fusion of the joint.

Micro welding requires the use of miniature TIG welding equipment (Gas Tungsten Arc) that is not much larger than a pen. Micro TIG welding is the latest in tool welding technology. Micro TIG offers superior control of weld placement while maintaining structural integrity with less residual stress.

Utilizing the assistance of arc micro welding it is possible to restore components which are challenging to weld; put together very small parts in to complicated structures , tools involving high alloy material and also repair of costly molds.

Other methods of micro welding utilize lasers. Micro laser welding makes use of tiny solid-state options possessing fractional energy to accomplish the job. Nonetheless, applications which can be incorporated into automated procedures tend to be the most suitable applications for laser micro welding. This style of minuscule welding additionally produces some of the very best qualities for welded joints

How To Mig Weld tips

how to mig weld tipsMore often than not people attempting how to mig weld desire to generate maintenance to numerous things, automobiles or possibly construct a project at-home. Trying to get moving quickly is generally a top priority without the need of to studying a long time with welding principles. Make use of the mig welding tips below to produce fantastic Mig welds.

A.  Proper Welding Wire dimensions. With regard to thin materials employ a smaller size wire and then for thicker materials an increased gauge wire. For a guideline, for 22 to 26 gauge material utilize.024″ wires, for 20 gauge to 1/8″ materials utilize.030″ wires and also 1/8″ up to 1/2″ opt for.035 or even.045″ solid wires. Dependant upon the performance capacities of the machine you might need to hold on to with smaller sized wire to obtain ample weld penetration. You’ll learn how you can mig weld quicker through getting started using smaller sized wire along with thinner metal size.

B. Use an appropriate Weld Shielding gas. Co2 gas is wonderful for penetration; nonetheless it might burn very hot with lighter gauge materials. In cases like this choose a mixture of 75% argon as well as 25% co2. When welding Aluminium implement 100 % pure argon gas.

C. Employ the proper size Welding Tips as well as cable liner for your preferred wire size. Be also sure to switch the push wheels to match your wire sizing. The push roller pressure should be fixed with only adequate pressure in order to feed the wire through your cable.

D. Welding Positioning. Before you start any arc set up the electrode to project around 1/4 to 3/8 out of the tip. On a fillet weld support the gun on a 90 degree angle towards the job and approximately ten degrees down the fillet pathway. Maintain the gun as upright as is possible and make use of both your hands if you can.

E. Welding Method, The question often asked when learning how to mig weld, should you push a weld or pull a weld? To drag or pull while you weld gives a slimmer bead as well as a little more penetration. Employing a push technique can make your bead much wider and offer much less penetration. The proportions of any finished fillet needs to be the just like any components of steel welded. For instance on the fillet when the steel is 1/2″ the edges on the weld must also end up being 1/2″ Continually place basic safety first, maintain your work space neat and clear of possible threats. Make certain all of the power cabling is shielded. Make sure you cover all uncovered skin; use safety gloves as well as the very best helmet are able to afford. Comply with all these simple ideas and you’ll know how to mig weld before you know it.

Gas Welding – How It Works

gas weldingGas welding or oxygen-acetylene welding is made possible because there are some gasses that burn at extremely high temperatures. With this process, oxygen as well as acetylene are fed from holding tanks to a torch and then when needed ignited. This combination makes a gas that burns at an incredible 5500 degrees Fahrenheit. This process was first put into use during the early part of the 1900s. The individual doing the welding holds a filler metal rod in one hand and the torch in the other, and using the intense heat at the end of the torch melts the filler metal into a joint which fuses two pieces of metal together.

This process can be used to fuse pipe together or to repair splits. It is particularly useful with pipe that is less than 2 inches diameter. It can also be used to work with sheet metal, as well as just about any metal that is used in industry. Gas welding is a bit slower than when using arc welding but it is also seen to give the welder much more control over the work they are trying to do.

There are some things to remember when working with gas welding that must be kept in mind for the sake of safety.

  • For the sake of safe storage, keep cylinders of oxygen and other gases stored separately with at least 20 feet between them, or they can be divided by a proper firewall.
  • Cylinders can burn easily so it is recommended that they be kept away from any combustible and flammable materials.
  • Maintain cylinders in storage areas where others cannot get to them to tamper with them, away from heat and to prevent damage to them.
  • Cylinders should always be maintained in an upright position, and when possible, chained to retain this position even when jostling takes place.
  • Always check the valves to assure they are closed prior to moving the cylinders.
  • Always have regulators and defending caps in place.
  • Never pull cylinders. Instead roll them on their bottom edges when moving is necessary.
  • During transport, reduce the cylinder movement by placing chains around them to prevent falling and extreme movement.

Oxy-acetylene is the typical combination used in gas welding and is generally chosen for general cutting and welding work including work to repair rips and tears in metal. Each gas is contained in its own cylinder and combined through the use of separate hoses leading from regulators attached to the top of the cylinders. These hoses then lead to the torch where they are attached to create the mixture needed to create the intense heated to work with metals.

The regulators are necessary to control the flow of gases, and a non-return valve is also needed to prevent the possibility of detonation of the acetylene tank. This valve is all part of the checks needed for proper and safe use of oxy-acetylene gas welding.

Other equipment required to work with oxy-acetylene gas welding would be a check valve, welding torch, cutting torch, rose-but torch, and injector torch. All of this equipment do different types of gas welding and allow the user to make the right cuts or joints that are required for the work they are completing.

 


Plasma Cutters for Fast and Efficient Performance

plasma cuttersYou may be wondering what is a plasma cutter and what makes it the right choice for cutting through ferrous metals. Well to understand this type of cutter you first have to know what makes plasma cutting so different.

Plasma is actually what is known as the fourth state of matter. You may have been taught that there are only three states of matter consisting of solid, liquid, and gas, but in fact there are four states of matter, with plasma making up that fourth. Simply put plasma is just an ionized gas with sufficient enough energy to release electrons from molecules and atoms to allow the coexistence of both electrons and ions. By boosting gas to and extremely high temperature you will get plasma.

This energy causes the gas molecules to break apart and the atoms to split. As the electrons and ions are collided with by these fast-moving electrons the release of a huge amount of energy is accomplished. It is this energy that creates the plasma cutters cutting power.

How The Plasma Cutter Works

A plasma cutter works by way of sending pressurized gas down a tiny channel that is in the cutting nozzle. At the center of this nozzle channel is found an electrode that is negatively charged. As power is applied, and the tip of the nozzle is touched to metal that is positively charged, this connection completes a circuit with a powerful spark. Gas passing through this channel provides a spark and heats up the gas to the point of the before mentioned fourth state.

The temperature of this state of matter can reach an amazing 30,000 degrees Fahrenheit which makes a plasma cutter able to cut through just about anything just like cutting through butter.

With the high velocity plasma flowing from a negatively charged electrode and one that is positively charged and created by plasma cutters you can see the efficiency of the operation.

When using a plasma cutter you will find that the metal that is not in the cutting area will stay rather cool, and this prevents the kind of warping and damage to paint that can be seen with typical cutters using flame. Plasma cutters are about five times as fast as traditional welding torches, and they are not reliant on gases that are flammable. They also come in handy when you use them to pierce or gouge metals speedily and with accuracy.

Many plasma cutters today are computer numerically controlled or cnc machine and are a staple in industry. Plasma CNC machines allows for cutting a variety of shapes efficiently and through the use of automation. While there is certainly a wide array of plasma cutters available for purchase, you will more than likely want to see everything they can do before you purchase one of your own. Your choice should be from a reliable supplier who has a track record for producing well built plasma cutters that are accurate, fast, durable, and offer a profitable option for doing the kind of work you are looking for.