Sharp Cut

Apr
20
2010

Posted by: Administrator in Categories: Shavers and Accessories.
Using Tags: knife, knives, sharp, sharp cut filter, sharp cutlery, sharp cutoff pentode, sharp cuts, sharp cutting wings lyrics, sharpening, tools

Sharp Cut

Reasons Behind Using Assist Gases In Laser Cutting Processes

Ever wonder how they get those holes in that stainless steel sink so that the fixtures and drain can be installed? Maybe you've seen the Majestic Roof Garden Hotel in Adelaide and wondered how the precise steel facade was created. Modern laser cutting has provided the means to creating such high quality cutting of stainless steel.

Laser cutting is a technique that allows faster and higher quality cuts than traditional torch cutting or other methods. Since modern laser cutting is computer controlled a more precise cut can be easily made. This precision allows holes with a small diameter to be made in various pieces of steel.

Typical laser cutting involves focusing the laser beam through a lens onto the surface of the material being cut. The laser either moves along the cut surface or the material itself is moved as the laser remains stationary. An assist gas, usually nitrogen or oxygen, is blown along the material to remove any excess molten metal from the edge. Each of these gases has its advantages and disadvantages.

Using oxygen as an assist gas allows for much higher speeds of cutting. It is also more cost effective. The exothermic reaction, a reaction that generates heat, allows this to happen, as well as providing for a better cut. Unfortunately, this same reaction causes oxidization and leaves an unattractive brown scale on the edge. This must be removed with de-scaling measures; either chemical or mechanical, before it is to be welded. One of the major disadvantages of oxygen assisted laser cutting is this extra step.

On the other hand, using nitrogen as an assist gas results in a much cleaner cut. As nitrogen is an inert gas, there is no exothermic reaction between it and the stainless steel. This prevents oxidization from occurring, leaving a shiny edge instead of the scaled edge. By keeping the cut edge clean, nitrogen assisted laser cutting prevents the time consuming step of de-scaling after the cut is made. Nitrogen assisted laser cutting is slower than oxygen assisted cutting, however, and requires a high purity level in the gas supply. Also, as there is no exothermic reaction, the gas must be used at a high pressure. Nitrogen is also more expensive to use than oxygen.

Most laser-cutting operations today use nitrogen as the assist gas because of the reliable results. Nitrogen can be a costly gas, though. When cutting thicker pieces of stainless steel, the cost of the gas can run as high as ninety-percent of the operating cost. Fortunately, nitrogen generating equipment helps offset this cost. This equipment uses carbon molecular sieves to take oxygen out of compressed air, leaving a relatively pure source of nitrogen available to use in precision laser cutting.

With these advances in nitrogen cutting technologies, as well as higher powered lasers being used on the material, it's no wonder that this is quickly becoming standard practice. Avoiding the extra task of de-scaling is a major advantage in nitrogen use. A simple stainless steel piece can be a picture of beauty when it is sharp, precise and possesses a shine all over.

About the Author

Billy Kite from the online marketing firm, Future Of SEO.
Premium Steel Sales offers quality hrpo - hot rolled pickled and oiled steel, Steel sheets as well as other steel products.

Victorinox 40520 Fibrox 8-Inch Chef's Knife

Sale Price: $24.72

Description

Nothing is worse than going to cut with your cutlery, and having the handle slip around in your hand. To combat this potential for injury, Victorinox has created this Fibrox chef's knife. The Fibrox® handle is textured and provides a firm grip, even when wet, and does not slip or slide around...

Features

8-inch multipurpose chef's knife designed for chopping, mincing, slicing, and dicing
High-carbon stainless steel blade provides maximum sharpness and edge retention
Blade is conical ground lengthwise and crosswise for minimal resistance while cutting; laser tested to ensure optimum cutting power
Patented 2-inch Fibrox handle is textured, slip resistant, and ergonomically designed
Hand washing recommended; lifetime warranty; expertly made in Switzerland

Ginsu 04817 International Traditions 14-Piece Knife Set with Block, Natural

Sale Price: $27.60

Description

Many associate Ginsu knives with the product’s kitschy infomercial from the â70s that begins with a karate kick to a watermelon and proceeds with a demo of these knives cutting through just about anything in the house...

Features

Set includes 7 kitchen knives, 6 steak knives, and natural colored hardwood block
Symmetrically-cut, two-dimensional serrated edges for precision slicing
Stainless-steel blades never needs sharpening
Full tangs triple-riveted to bakelite handles
For left- or right-handed use; limited lifetime guarantee

AccuSharp 3036-2024 Knife Sharpener Replacement Blades

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Description

Diamond Honed Tungsten Carbide sharpening blades are double reversible.ATTRIBUTES Material: Carbide Steel Special Features: Easy to use! Type: Hand Held

Features

Replacement Blades for all AccuSharp Sharpening Tools
Easy to install with a screwdriver
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Diamond Honed Tungsten Carbide

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Description

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Wahl 79524-2501 Chrome Pro 24-Piece Haircut Kit

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Description

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Self-sharpening

I have cut into my extra sharp cheddar cheese to find that it tastes like American. Have you ever?

Had a similar situation where the product and the label were not quite in synch?

Sorry I have never tasted an American. I can see that it would be quite a shock to the system. Biting into your cheese expecting that delicious sharp tang of Cheddar and finding your mouth full of American.

Yeww!!!! Take it back to the shop you bought it from and complain loudly. I sure would.

Cheers