Welding is a sculptural process where it deals with raw items such as metal and pipes and it is a process where welders deal with welding fumes and heat. From the decade, welding has developed a lot and new welding technologies with advanced welding equipment and welding systems have been developed. When you consider the history, there were no welding schools at that time, but today you can see lots of welding schools and modern welding products with advanced welding tools have been introduced. Manufacturing process needs welding and it fails if the welding industry is not developed and equipped well with proper welding products. For the welding industry to run successfully the industrialist needs proper welding accessories with appropriate welding safety and welding gears. Plasma cutter has made the strong foundation in welding industry and plasma cutter machine is also used for the process of plasma gouging process. It is a process that is used to remove the welded materials and also it find cracks, porosities in welding materials.
Posts Tagged ‘Arc Welder’
A brief insight into welding
Thursday, August 26th, 2010
Brief insight into hot air welder
Tuesday, August 24th, 2010Hot air welder otherwise known as the hot gas welder is a kind of plastic welding technique which is almost similar to gas welding metals. However the specific technique is different in both the welding method. A hot air welder, which is a specially designed heat gun, produces a jet of hot air that softens both the parts to be joined and a plastic filler rod. It is important to note that all of the things to be welded must be of the same or a very similar plastic. However welding PVC to acrylic is an exception to this rule. For manufacturing smaller items like chemical tanks, water tanks, heat exchangers and plumbing fittings, the hot air welder is the most common fabrication technique being used.
If the welder is used to weld case of webs and films, a filler rod may not be used. Here two sheets of plastic would be heated using a hot gas or a heating element and then rolled together. This process is comparatively fast and can be accomplished continuously. There is another variation in the hot sir welding technique. It is called the freehand welding in which the jet of hot air from the welder is played on the weld area and the tip of the weld rod simultaneously. The rod is pushed into the joint and fuses to the parts as it softens. This process is slower compared to others. But the welding is versatile and can be used in almost any situation.
How to stick weld?
Wednesday, August 18th, 2010Stick welding is known as manual metal arc welding or shield metal arc welding. This is very popular form of arc welding. Select the steel to weld. Steel should be in plain carbon steel with less than 1 percent carbon, less than 0.1 percent silicon and 0.035 percent sulfur. Find the joint position based on the thickness of the metal. This angle should be lower for thicker metal with a 45 to 75 degree angle being best for 10 to 18 gauge steel. Make sure that joint geometry is correct. Width should be consistent for the entire joint. Clean the joint before welding to attain the best travel speed. Use the largest electrode that is practical. This is generally 3/16 inch for overhead and vertical welding while 5/32 inch is usually the maximum size for low hydrogen applications.
How are Arc welding used?
Wednesday, July 7th, 2010Welding is nothing but connecting (join) two metals together into single piece. Joining metals were done with heated electric arc on the edges of the metal. There are many types of welding were one equipment differs from the other and also has different characteristic. Some of the most used welding equipment is the Mig weld, Arc weld, Tig weld and many more.
But the Arc weld is more widely used in large and small scale industry because of its low cost and capital. These welders have lot of features which are helpful while welding. This has unlimited amperage control which welds the metal in professional manner. These are light weight but are sturdy enough to build models and weld metals. There are very light and can be carried around but can cut thick metals in no time. There are some equipments of arc weld which carries thermostatic heat which protects the unit form any damages. The Arc welds are divided into four categories which are Shield Metal Arc Weld, Gas Metal Arc Weld, Submerged Arc Weld and Flux - Cored Arc Weld.
Speed of Travel for Shield Metal Arc Welding
Thursday, April 29th, 2010One of the important things that you will have to see while performing a shield metal arc welding is the speed of travel. You will have to keep in mind that its importance as the appropriate travel speed creates a weld bead with the preferred contour or crown width as well as the neat look with perfect finish. You might have to fine-tune the travel speed so as to make the arc stay within the one-third of the weld pool.
When the travel speed is slow, it produces wide, turned in bead along with a shallow diffusion. On the other hand extremely high travel speed also decreases the penetration creating a thin or extremely crowned bead, as well as undercuts in a few cases.
Another tip to improve your welding is to always get a good view of the weld puddle. Or else you won’t be able to be sure that you are welding the joint. Keep your head off to the side f the smoke so that your sight doesn’t get disturbed.
An Overview for Manual Metal Arc Welding
Friday, February 5th, 2010Manual metal arc welding technique was discovered in Russia during 1888s. This technique of welding is also termed as shielded metal arc welding (SMAW) or stick welding. The process of welding first starts by striking an arc between the base materials and the consumables electrode rod. These rods are made up of steel and it is covered with a flux and the weld area is protected from the oxidation and contamination during the welding process.
During the process when an arc is struck between the electrode and work piece materials the surfaces are melted down into the weld pool. And a coating is formed around the rod by melting down the flux. This melting of coating forms gas and slag to cover the weld pool from the surrounding environment. The speed of welding is relatively slow in this process because more often the welder has to replace the consumables rod and has to chip down the weld bead once the welding is over. This process of welding can also used to
weld other metals too.
The stability of arc formed, depth of penetration, the amount of metal being deposited totally depends on the position of welding and amount of coating provided on the electrode during the welding.
Flux Core Arc Welding
Monday, January 18th, 2010- This process is mixture between Mig and Stick welding.
- This process is same as Mig Welding, except instead of a shielding gas using in Mig Welding, there is flux in welding wire.
Advantages
We can Use it in All Environments.
Disadvantages
Need additional clean up to remove flux
Fundamentals of Arc Welding or SMAW
Monday, November 16th, 2009Welding is of many types. SMAW or Shielded Metal Arc Welding is a complicated name for arc welding. In arc welding an electrode coated with flux is the one which aids in making welds. Electric arc is produced with the help of AC or DC power. Here the shielding gas is formed when flux starts to disintegrate and vaporize. It resists contamination. Below are the basics of using an arc welder.
- Dc is used to produce smooth welds.
- AC produces more spatters.
- Direct Current Electrode Negative is named as Straight Polarity and Direct Current Electrode Positive is named as Reverse Polarity.
- SMAW can lead to defects such as undercut, slag inclusion and porosity.
- Exposed skin welding leads to cancer and brutal medial issues in the long run.
- Spatters are drops of molten metal. They stick to the metal that you are welding. They usually chip off unless you are using your welder at a very high temperature.
Reasons To Opt for Arc Stud Welding
Friday, October 16th, 2009There are a range of applications that arc stud welding can offer. They include heavy construction, ship building, appliance, automotive, boilers and aero-dynamics. Arc welders perform magic on almost all material width. Arc welders may be used on a variety of material depth starting about .060 in to numerous inches. The stud welding procedure is beneficial for the subsequent reasons:
- Key design terms may be willingly tailored to the procedure, for instance material types, metallurgical aspects, unusual yarn designs, fit-up tolerances, etc
- Competent of producing a full cross segment weldment through a bare minimum of base metal distortion or surface disruption
- Capable of being utilized in locations that don’t allow application of other binding methods
- Procedure lends itself to the computerized concept or soaring production shops
- Arc welders produce welds which are less expensive per unit than
other methods - Procedure may be successfully used with a bare minimum of time depleted in workers training
- Procedure may be successfully utilized in maintaining weld value with a minimum examination time.
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