Metal processing is carried out primarily on metal cutting machines. Recently, more and more new technologies are being applied to the mechanical processing industry, so the machines are increasingly upgraded, improved and performed a series of material cutting operations. In it, there is grinding.

1. What is grinding?

Grinding is one of the most important metalworking methods that today is primarily performed on new technological grinding machines. Grinding is one of the types of metal processing in the process of metal cutting to turn starting materials (also known as workpieces) into parts of the right size, shape and quality as required. .

2. Grinding technique

Grinding is one of the basic forms of metal machining. For grinding parts, people often use grindstone. The grinding wheel removes an extremely thin layer of metal from the surface of the workpiece, smoothing out the details and usually after grinding, the product will have a very high surface gloss.

Machining grinding

The more modern the grinding machines are, the more their grinding stones can remove very thin layers of metal. High-tech grinding machines can achieve processing accuracy of about 0.001 mm. Grinding can be done on materials from hard to very hard (eg hardened steel, etc.).

The method is applied when we cannot use any other method to create a smooth and glossy surface for certain thin parts. Currently we have the basic grinding methods, which are grinding the surface of cylindrical parts, grinding the outside of the circular shaped parts, grinding the detailed holes (grinding inside) and grinding the plane ( such as a table, ruler, ruler ...)

3. Importance of grinding

Grinding is an indispensable stage when cutting metal, so in all machines such as milling machines, drilling machines, planing machines, boring machines ... details are required to undergo grinding process.

Normally in the process of using machines such as milling, planing, drilling, turning, ... the cutter will gradually wear out over time and level of use. Therefore, to reuse the blade, we must sharpen it. In classical mechanical processing lines, people often use two-stone grinders to sharpen blunt blades.

4. Mechanical processing by grinding method

Mechanical processing by grinding method has two forms: rough grinding and fine grinding.

- Rough grinding: This is a preliminary process of an object, which is carried out in a short time, simply removing some of the excess metal. Requirements when performing rough grinding is in the shortest time how to remove the most metal layers. The surface of the object is not smooth, smooth and the accuracy of the product is low.

- Fine grinding: Fine grinding is the process of processing in detail, thoroughly the outer surface of the product. After finishing, the product has a high gloss and necessary precision. Fine grinding loses the marks produced by roughing. To achieve the high precision required, after rough grinding, people refine the product many more times.

5. Attention when grinding

When grinding, workers must pay special attention to the following requirements:

- Always make sure that the screws have been correctly installed and tightened because the grinding wheel is very fragile if they are installed and screwed incorrectly Before installing the grinding wheel, it is necessary to strictly follow the rules. The grinding wheel must be installed in a shaded box carefully and do not work directly on the grinding wheel without a can.

- Before working, it is necessary to carefully check the accuracy and certainty of the jig to be processed, if the positioning is not tight, it will create a difference between the object to be sharpened and the stone.

- Make sure that the excess amount of grinding is in accordance with the regulations and pay attention to the work of cooling for the sharpener. For each type of cutting knife, the object to be sharpened, the posture and standing position of the worker also change flexibly requiring the worker to be knowledgeable and know how to operate as well as the technical operations necessary to operate. machine operator.

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