Metal Working: Historical Past, Progress, Significance, Procedures, Function In Everyday Life

Metals are all over. Our home equipments at our homes, the furniture in our workplaces, and the other structures that we see each time we go outdoors, all these things are totally or partially made of metal. This just goes to show how large of a part metals play in our everyday life.

The process of metal working began a lots of years ago. Even pre-historic men are supposed to have practiced this technique. Even if it is a bit hard to trace how exactly metal working started, possibly we can all agree that it predates history. Imagine how life it would be like for the ancient men if they did not have metallic tools to use for their cooking, hunting, and any other activities. They were able to make sharp tools and knives out of pieces of rocks and metals. Since then, the entire thing has developed into something more sophisticated.

Normally, there are 3 categories of metal working. They are cutting, joining and forming. Every of these three processes even has smaller processes categorized under them.

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

2. Cutting - it's done by removing some part of a material to modify its physical appearance. The material would generally be cut into two pieces, the waste part and the finished part. Cutting has a few sub-processes including machining, burning, drilling, threading, turning, grinding, and filing.

3. Joining - examples of joining processes are brazing, soldering and welding. In brazing, you would require to melt a filler metal and change it into a capillary to assemble minimum two work pieces. When the filler metal comes into contact with the work pieces, it would solidify and create a tough and sturdy joint. It's nearly the same as soldering, but the previous is done at temperature greater than 450 degrees Celsius. Soldering is done at temperatures less than 450 degrees Celsius. In welding, materials are attached by thermoplastics or metals. The work pieces are melted and are then added to the filler material so some sort of a molten material pool is formed. This would then be left to cool to form a tough joint.

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