What are chisels? and what is the work of chisel?

What are chisels? and what is the work of chisel?

A chisel may have originated from a stone ax. It is a type of almond-shaped device with a sharp tip. The long rectangular chisel-shaped stones appeared around 8000 BC The researchers claim that the later Neolithic period invented a version and it was grounded.

 Gauge was able to clean chisel hollow parts with concave instead of flat sections and was used when making curved holes instead of flat or spot walls. At that time, very hard stone chisels and gauges were used to rough up very hard objects.
 
In earlier times, copper chisel followed by bronze chisel. These chisels were used not only for working wood but also for soft rocks! As many magnificent Egyptian-made monuments of sandstone and sandstone bear witness!

Different type of chisels

 
It was easy to work on any metal by first using a copper chisel then placing a small chisel on the wooden handle. This also reduced the risk of the melts setting the handle in a socket or touching the round handle with a cast stop. But both these forms presented a modern form of this! The Egyptian logo used a chisel and club-like wood with great skill to create small drawers (panel waxes, furniture, coffins, and chest joints!).

 In the centuries that followed, chisels and gauges were made very different, such as increasing demand for furniture decorations at property sites and other places, as well as increasing chisel diversity. The moths and heavy tools were made in a more delicate model suited to the Corves wood! Which were suitable for artisans making paneling, staircases, doors, and windows above the walls.

The captions are used to peel and cut metals, are made by forging them with high carbon steel, and are placed on the octagonal or octagonal side of the unseen surface of the body. After being made by forging the chisel, the lower end of the chisel is made by grinding it into a sharp edge (a sharp edge with a different tip). To provide adequate chipping and hardness, the crater edge of the chisel is hardened and tapped. The middle part of the torrent and the body are kept taper.

 
Parts of Chisels: -

1. In-charge head

2 body

3 tapper part

4 cutting edge

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working parts Chisels

  The top part of the chisel is the top that is chamfered and is spread by repeated injury, which is called mushroom head. Such ends should be used only after grinding by cooing. The body of the chisel is not hardened and tamped. The angle of Karatanadhar is made from 35 ° to 70 ° and or the following angle is placed according to the metal which is to be cut. For common metals, it is kept as follows: -

1 aluminum glass and zinc 35 degrees

2 copper and brass 40 degrees

3 beat iron 50 degrees

60 degrees for 4 cast iron and other common works

5 cast steel. 70 degrees

                        The chisel, which cuts the metal in cold conditions, is called an emergency chisel and these are used in fitting work. The size of the chisel is specified by its length and the width of the shearing edge. For cutting thin metal 200 * 25 mm, thin and hard metal requires more wide grooved raisins. It is of the following type: -

Hot and wet chisel

1 hot chisel

2 apart chisel 

what is a chipping operation by chisels?

Chipping is the method in which a thick layer of metal is cut from the surface of the job as chips. In this method, the chisel is held by hand and placed at an angle of 40 degrees. For normal work, the cutting angle of the chisel is 60 degrees. Half of which will be 30 degrees, thus when placing the joint at an angle of 40 degrees on the breast, then the edge will get a clearance of 10 degrees and the cutting will be done at every angle of 20 degrees, in which the work can be done easily and properly. Will be done.

chipping operation

How to Chipping method with the chisels

1 The job should hold up well by supporting a piece of hardwood in the middle of the voice.

2 The front edge of the job should be slightly chamfered from the file so that the edge of the chisel takes place easily while cutting.

3 Voice should be fitted with a chipping guard at the front.

4 Holding the chisel in one hand, holding it with the other hand, should hold it with the other hand near the end of the handle, and start chipping.

5 While cutting, no more metal should be cut simultaneously and oil should be applied on the edge of the chisel.

6 While cutting, the chisel should not hurt heavily when it reaches the other end.

Grinding formula of chisels

After repeated use, the edge of Chennai gets spoiled and it's top also gets spread, so it is ground. To grind, the following things should be kept in mind: -

1 If the top of the chisel has spread, it should be ground to the right size.

2 If the edge of the chisel is damaged, it should grind the cut metal accordingly.

3 The casing should be held properly and ground using the tool rest.

4 The edge of the chisel should not be directly ground.

5 While grinding the shear blade, the chisel should not be pressed by exerting too much strength and the chisel should be kept submerged in the water tank repeatedly by cooling it so that it will remain on it.