Orbital welding

Written by Mahesh Ugale

Orbital welding is Automatic Tunguston inert gas welding. It eliminates chances of manual errors in welding. It produces identical welds for hundred of times hence accuracy in welding.

Orbital welding was first used inrepparttar 1960's whenrepparttar 102798 aerospace industry recognizedrepparttar 102799 need for a superior joining technique for aerospace hydraulic lines. A mechanism was developed in whichrepparttar 102800 arc from a tungsten electrode was rotated aroundrepparttar 102801 tubing weld joint. The arc welding current was regulated with a control system thus automatingrepparttar 102802 entire process. The result was a more precision and reliable method thanrepparttar 102803 manual welding method it replaced. Orbital welding became practical for many industries inrepparttar 102804 early 1980's when combination power supply / control systems were developed that operated from 110 V AC and were physically small enough to be carried from place to place on a construction site for multiple in-place welds. Modern day orbital welding systems offer computer control where welding parameters for a variety of applications can be stored in memory and called up when needed for a specific application. The skills of a certified welder are thus built intorepparttar 102805 welding system, producing enormous numbers of identical welds and leaving significantly less room for error or defects.

Orbital Welding Equipment

Inrepparttar 102806 orbital welding process, tubes / pipes are clamped in place and an orbital weld head rotates an electrode and electric arc aroundrepparttar 102807 weld joint to makerepparttar 102808 required weld. An orbital welding system consists of a power supply and an orbital weld head.

Power Supply: The power supply / control system supplies and controlsrepparttar 102809 welding parameters according torepparttar 102810 specific weld program created or recalled from memory. The power supply providesrepparttar 102811 control parameters,repparttar 102812 arc welding current,repparttar 102813 power to driverepparttar 102814 motor inrepparttar 102815 weld head and switchesrepparttar 102816 shield gas (es) on / off as necessary.

Weld Head: Orbital weld heads are normally ofrepparttar 102817 enclosed type and provide an inert atmosphere chamber that surroundsrepparttar 102818 weld joint. Standard enclosed orbital weld heads are practical in welding tube sizes from 1/16 inch (1.6mm) to 6 inches (152mm) with wall thickness' of up to 0.154 inches (3.9mm) Larger diameters and wall thickness' can be accommodated with open style weld heads.

The Physics ofrepparttar 102819 GTAW Process

The orbital welding process usesrepparttar 102820 Gas Tungsten Arc Welding process (GTAW) asrepparttar 102821 source ofrepparttar 102822 electric arc that meltsrepparttar 102823 base material and formsrepparttar 102824 weld. Inrepparttar 102825 GTAW process (also referred to asrepparttar 102826 Tungsten Inert Gas process - TIG) an electric arc is established between a Tungsten electrode andrepparttar 102827 part to be welded. To startrepparttar 102828 arc, an RF or high voltage signal (usually 3.5 to 7 KV) is used to break down (ionize)repparttar 102829 insulating properties ofrepparttar 102830 shield gas and make it electrically conductive in order to pass through a tiny amount of current. A capacitor dumps current into this electrical path, which reducesrepparttar 102831 arc voltage to a level whererepparttar 102832 power supply can then supply current forrepparttar 102833 arc. The power supply responds torepparttar 102834 demand and provides weld current to keeprepparttar 102835 arc established. The metal to be welded is melted byrepparttar 102836 intense heat ofrepparttar 102837 arc and fuses together.

Reasons for Using Orbital Welding Equipment

There are many reasons for using orbital welding equipment. The ability to make high quality, consistent welds repeatedly at a speed close torepparttar 102838 maximum weld speed offer many benefits torepparttar 102839 user:

• Productivity. An orbital welding system will drastically outperform manual welders, many times paying forrepparttar 102840 cost ofrepparttar 102841 orbital equipment in a single job.

• Quality. The quality of a weld created by an orbital welding system withrepparttar 102842 correct weld program will be superior to that of manual welding. In applications such as semiconductor or pharmaceutical tube welding, orbital welding isrepparttar 102843 only means to reachrepparttar 102844 weld quality requirements.

• Consistency. Once a weld program has been established an orbital welding system can repeatedly performrepparttar 102845 same weld hundreds of times, eliminatingrepparttar 102846 normal variability, inconsistencies, errors and defects of manual welding.

Web Awards- And how to choose

Written by Dan Anderson

Web Awards - Credibility By: Dan Anderson

I recently looked into applying for web awards. I saw them as a way to convey credibility to my customers and prospective buyers. After looking through many sites, it turns out there are an extremely large amount of award sites to choose from, but how many actually run a quality system of rating? Anyone can rate a site and hand out awards so what makes one site more credible thanrepparttar other? There are a few things to consider before you apply for an award or put an award on your site.

Criteria- Do you meet it? If your looking for a focused assessment of your site look for criteria that is limited to a specialized category of sites. Criteria that any Joe can meet doesn’t meanrepparttar 102797 award is not credible, but wouldn’t you rather judges grading you against people in a similar field?

Scoring-Every award site implements a scoring system. It is usually easy to find and you should look this over. Then with this score sheet raterepparttar 102798 web award site! If they can’t stand up to their own scoring they aren’t one to choose. Another thing to look for on a score sheet is what is being rated and how. If this award site is rating based on only a few items on a scale from one to three, there will be little accuracy inrepparttar 102799 assessment.

Judges-Look around a site for information on who is/are judging these sites. Read their bio(s), look at their site(s), and check their credentials. If you cannot locaterepparttar 102800 judges’ information who(m) are you really dealing with? It could be a robot for all you know, that just hands out awards left and right.

The Award- Look atrepparttar 102801 award itself. Is it more of an ad for their site or a certificate of achievement for you? Look forrepparttar 102802 latter. Also isrepparttar 102803 graphic of high quality? Ifrepparttar 102804 award is not appealing or looks unprofessional that will reflect on your site. One thing, that is an indication of a good awarder, is a site that sends a real certificate to your house or place of business as well as a graphic for your site. Now a days some award sites are just a disguised form of link exchange.

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