Metal Working: History, Improvement, Significance, Techniques, Application In Everyday Life

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Metal Working: History, Improvement, Significance, Techniques, Application In Everyday Life

Metals are everywhere. Our appliances at our houses, the furniture in our offices, and the any other structures that we see each time we go outside, all those things are totally or partly made of metal. This just goes to show how big of a part metals play in our lives.

The process of metal working started a lots of years ago. Even pre-historic men are thought to have practiced this technique. Even if it's a bit difficult to trace how exactly metal working started, maybe we can all agree that it predates history. Think how life it would be like for the prehistoric men if they didn't have metallic equipments to use for their cooking, hunting, and any other activities. They were able to create sharp tools and knives out of pieces of rocks and metals. Since then, the whole thing has advanced into something more advanced.

Generally, there're 3 different types of metal working. They are cutting, joining and forming. Every of these 3 processes even has smaller processes categorized under them.

1. Forming - this is done to deform or modify an object by using pressure, heat, or mechanical force. There are many kinds of forming processes and many of them are: plastic deforming, casting, & sheet metal forming. Under sheet metal forming, you will find bending, roll forming, spinning, drawing, rolling, stamping, shearing, raising and decambering.

2. Cutting - this is done by removing some part of a substance to change its physical look. The material would normally be cut into 2 pieces, the waste part and the finished part. Cutting has some sub-processes with machining, burning, drilling, threading, turning, grinding, and filing.

3. Joining - examples of joining processes are brazing, soldering and welding. In brazing, you would need to melt a filler metal and turn it into a capillary to set up at least 2 work pieces. When the filler metal comes into contact with the work pieces, it would harden and create a hard and sturdy joint. It is almost the similar as soldering, but the former is done at temperature more than 450 degrees Celsius. Soldering is done at temperatures below 450 degrees Celsius. In welding, materials are attached by thermoplastics or metals. The work pieces are melted and are therefore added to the filler material so that some kind of a molten material pool is created. This would then be left to cool to form a strong joint.

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