بعض آلات القطع مقصات - الآلات القاطعة .. الآلات التي نستخدمها كل يوم وكيف تؤدي عملها

Some cutting machines are scissors - Cutting machines .. The machines we use every day and how they work

Some cutting machines are scissors:

You know that many cutting machines are edges of different shapes and sizes. But you also use many cutting machines in a way that is very different from these machines. This method is cutting.

Here is a method that explains the cutting process. Cut a crust from a thin slice of bread, then place it on a table so that part of it comes out of its edge. Hold the piece of bread on the table with one hand, then push with your other hand -

The edge of a flat book down over the piece of bread that comes out of the edge of the table, as you see in the drawing published on page 87. You will notice that the piece of bread has been cut into two pieces in a sliding motion. Then notice that the bread has not been separated by the effect of a sharp edge, but has been pushed away by the flat side of the book. This is the motion that we call "cutting".

Scissors:

Scissors are the most common and widespread cutting tools. When you cut something with scissors, its blades slide over each other exactly like the flat edge of a book slides over the edge of a table. When the thing caught between the blades is cut, it separates into two pieces exactly like a piece of bread.

On page 89, you will see another cutting tool, the hair clipper. The most important parts of which are two steel combs that move easily, one opposite the other. When you move the handles of the tool, you cause one of the combs to slide back and forth through the other comb. The hair that is caught between the teeth is cut and then pushed away from the tool by a movement of the scissors.

Hair clipper

This upper comb moves back and forth through the lower comb.

The electric beard trimmer works very similarly to the hair clipper. However, instead of the combs in a hair clipper, there are two hollow metal tubes, one inside the other, and each tube has many small slits. An electric motor causes the inner tube to slide back and forth, while the outer tube remains stationary. As the razor moves across the beard, the hair enters through these slits and is cut by the sliding motion of the tube.