Methods of Cutting Mild Steel

Various methods exist for cutting mild steel. Waterjet, plasma, laser cutting and power tools are amongst several ways of cutting mild steel. The best method for a given situation depends largely on the thickness and configuration of the steel being cut.

The water jet method can be used to cut straight through mild steel sheet, mild steel plate or mild steel tube. In principle, a waterjet works much like the natural water erosion that occurs over time. A water jet cutter uses a thin stream of water at very high pressures, usually between 33,000 and 75,000 PSI, to cut through steel. Sometimes an abrasive substance, such as aluminium oxide or garnet is mixed with the water stream. In cases where the material being cut is sensitive to high temperatures, water jet cutting is the preferred method since it does not create a heat-affected zone (HAZ). Waterjet is not a very quick method of cutting, so it is not preferred when speed is required.

Plasma cutting can be used to cut mild steel and other materials of various thicknesses. An inert gas is forced through the plasma torch nozzle at high speed. An electric spark ionises the gas running through the torch nozzle and creates an arc. This turns some of the gas into plasma, which melts the material being cut. This process is quick enough to force the molten metal away from the cut, creating a relatively clean slice in the mild steel.

Laser cutting has been used mainly for industrial applications, but hobbyists, small businesses and schools are also starting to use this method. In laser cutting, a computer controls the laser and directs the cutting pattern. Where the laser is directed, the material is blown away, burns, vaporises or melts, depending on the type of laser cutter. The more powerful lasers can cut through steel up to 3.429 cm think. Laser cutting is suitable for making straight cuts in mild steel sheet and mild steel tube. Because of its precision, laser cutting is also the best method for cutting intricate patterns or designs in the metal.

Another option for cutting mild steel is to use power tools. Most power tools are available in cordless or corded varieties. Corded tools are more powerful and therefore probably better for cutting steel. A circular saw fitted with carbide tips should be able to cut straight through mild steel tube or even fairly thick mild steel plate. This method will result in a lot of metal shavings, so personal protective equipment is a must.

Each of the methods discussed above is effective for cutting mild steel. When cutting steel 2.54 cm or less thick or when cutting according to a pattern, laser cutting is advisable. Where high cutting temperatures are a problem, waterjet is the preferred method. When attempting to make a straight cut in thicker mild steel plate, plasma cutting works better. Especially in a small shop or at home, a corded circular saw with carbide tips will do for making straight cuts in mild steel sheet or mild steel tube.

Heavy Spring Weather Causes Drop in Heathrow Performance

It was a particularly rough spring for Heathrow Airport according to recent figures from the Civil Aviation Authority. Storms and heavy rainfall caused a great many flight delays this past April – June, the rainiest spring on record. While all airports are affected by inclement weather, Heathrow is particularly susceptible to weather-related disruptions because “it operates at 99.2% capacity” according to a BAA spokesperson.

The fact that Heathrow is essentially full has prompted many to plead with the Government to expand Heathrow Airport by adding a third runway. Thus far, this is something the Government has been reluctant to do, but they set up an independent commission earlier this month to deliberate on the question of Heathrow’s capacity as an international travel hub. Sir Howard Davies is serving as chairman of the commission.

Already London’s busiest airport, conditions at Heathrow worsened considerably over the spring, with over 25 per cent of flights experiencing delays. This is a considerable drop in performance over last spring, according to the aforementioned Civil Aviation Authority statistics. Flights that are more than 15 minutes late arriving or departing are considered delayed. Following these specifications, only 73 per cent of Heathrow’s flights arrived or departed on time, making it the lowest performing airport in Britain. During the same period, this past April – June, the 10 leading British airports achieved an average of 78 per cent for flights leaving or arriving on time.

To make matters worse, Heathrow’s immigration service also experienced severe difficulties this past spring. Some passengers had to wait upwards of two hours to enter Britain. According to the same set of CAA figures, Heathrow’s performance rating dropped six points over the same period last year. Among the 10 airports reported, Heathrow experienced the biggest drop in performance. All of this data will certainly be seen as proof of the need to expand Heathrow’s capacity.

Enlarging the airport is absolutely necessary if Heathrow is to remain a global travel hub, argue supporters of expansion. CAA Group Director for Regulatory Policy, Iain Osborne, stated that “Passengers are entitled to expect a good value flight that gets them to their destination on time…” According to Osborne, that expectation is fulfilled for most passengers in British airports, but the drop in performance over last year should be taken as a warning. More can and should be done to “…ensure even more passengers reach their destination on time.”

While arriving Heathrow passengers experience the most delays of any European airport, Heathrow Airport Taxis remain the most reliable means of traveling to and from the airport. Public transportation is crowded and runs on strict schedules, which can be stressful if your flight is delayed or you have to wait in immigration lines. Pre-scheduling a Heathrow Taxi ensures transportation is available as soon as you arrive. Heathrow Airport Taxi services include flight monitoring, so your driver will know the moment your flight lands. Only the Government can expand Heathrow Airport, but Heathrow Taxis can make the rest of your journey stress-free.

Pizza Money Blueprint

Pizza Money the New Buzz Word in the Home Based Business Industry

October 28, 2012

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