Modern industry greatly improves the quality of life by releasing new appliances for the household. One such tool is a knife sharpener. It allows you to easily sharpen any piercing and cutting objects.
Grinding machines for household and industry
Every day, mankind uses cutting tools: scissors, knives, screwdrivers, axes, etc. Frequent use of any of these items dulls. The sharp edge of the metal blade quickly “sits down”, which makes the tool unusable. And this is due not only to the mechanical impact that occurs during contact with other solid objects. The blade becomes dull even when not in use. Steel of any quality will corrode over time, which directly affects the sharpness of a thin edge. Therefore, such products need to be constantly undermined.
Periodic sharpening of sharp metal tools is also necessary in production. The quality of any industrial operation depends on the readiness of the equipment for work. Tool sharpening in manufacturing plantscarried out much more often, as in such conditions the load on the knives is higher.
The grinder is a necessary tool for solving industrial and domestic tasks. A modern machine for sharpening knives allows you to restore the sharpness of metal objects in a matter of seconds, while maintaining the geometry of the blade as much as possible.
Optimal blade angle
To effectively use a knife, it is important to sharpen the blade at a certain angle. The sharpening process should restore the angle between the edges of the blade.
There are recommended angles for each type of knife:
- Knife for bread, vegetables and fruits - 15-20 degrees.
- Multi-purpose knife for various products - from 20 to 25 degrees.
- Tourist knife - 25-30 degrees.
- Knife for cutting hard materials - 30-40 degrees.
Knives can be sharpened at the recommended angle manually using abrasive bars, whetstones. But to achieve the required angle of the blade in this case is quite difficult. To facilitate and speed up this process, special devices have been developed - machines for sharpening knives. They are easy to use and have a simple design.
What are knife sharpeners
This is an oversized electrical appliance with fast rotating abrasive discs. Compared to other sharpening devices, machines allow you to set the sharpening angle as accurately as possible and process the blade ina few seconds.
Such units are used in public catering establishments (restaurants and cafes), where there is a need for frequent sharpening of kitchen cutting tools. Machines for sharpening knives at home are impractical to use due to the high cost of these devices.
Modern electric sharpeners handle blades with different types of edges with high quality. They can sharpen both on one side and on both sides at the same time. With the help of a machine, it is possible to complete all stages of blade processing, from the formation of an optimal cut cut to polishing.
Usually, such devices have the function of selecting the operating mode. It allows you to set a gentle mode if you need to sharpen a thin blade from expensive material, or set a more complex treatment for hunting, outdoor and pocket knives. There is no need to disassemble the machine. There is a control panel on the body of the device, with which you can select the necessary sharpening parameters.
Electric knife sharpening machine can be used in both restaurant and home use. In the first case, the application is fully justified. The high cost of the fixture pays off quickly.
The benefits of electric sharpeners
Electric knife sharpening machine is very popular. It allows you to qualitatively sharpen the blade of any length and thickness, accurately maintaining the desired angle. Modern electric machines automatically detect the slope of the blade. The device perfectly sharpens knives withwavy blades.
Another advantage of this fixture is its versatility. Such a machine can be used for sharpening scissors, screwdrivers and other sharp tools. After polishing, the blade looks like new.
Usually, electric machines consist of several abrasive discs perpendicular to the blade and guide elements. Sharpening a knife on such a device is carried out in one motion. More complex models have several sets of discs with different grain sizes.
An important advantage of grinders is their long service life. Basically, such devices are supplied with grinding elements with a ceramic or diamond coating. Even with everyday use, the need to replace such knives is extremely rare. Homemade knife sharpeners may never be repaired.
Universal sharpening tool
For sharpening European and Japanese products, there is a universal machine for sharpening knives and scissors with three stages of the process. On the first one, knives are processed with a sharpening angle of up to 15 degrees, on the second - 15-20 degrees. The third uses composite discs that create a microscopic angle. This treatment creates a thin cutting edge.
This type of machine is suitable for sharpening kitchen, camping and pocket knives.
Grinder
This is a professional tool with felt andabrasive circles. Such a machine is used in manufacturing plants and in places of mass sharpening of knives. Processing is carried out by professional workers who have the necessary knowledge. A person without experience will not only not be able to sharpen the blade with high quality, but will also ruin it.
Professional knife sharpening machine provides long lasting blade sharpness.
DIY knife sharpening machine
If automatic sharpeners are not affordable, and sharpening knives by hand is too long and inefficient, you can make a tool with your own hands. There are several options for home-made designs, the manufacture of which requires very little time and effort.
To create a tool you need:
- abrasive bars or stones;
- knife stop.
As disks that are used in machine tools and electric machines, you can use ready-made stones or make them yourself. To do this, you need to take small glass plates 5 mm thick and stick sandpaper of different grain sizes on their surface using double-sided tape. When using such a device, it is not recommended to make quick movements so as not to overheat the blade.
Sharpener from wooden bars
To make this tool, you will need two abrasive and wooden bars of the same size. Procedure:
- Measure the desired sharpening angle and applycorresponding markings on wooden blocks.
- Apply a grinding stone to the marked lines and mark its width on both sides.
- On the markings, make cuts with a depth of 15 mm.
- Insert abrasive sticks into the grooves.
- Fix the structure with bolts.
