Modern industry significantly improves the quality of life, releasing new appliances for the household. One such tool is a knife sharpener. It makes it easy to sharpen any piercing and cutting objects.
Grinding machines in the home and industry
Every day, mankind uses cutting tools: scissors, knives, screwdrivers, axes, etc. From frequent use, any of these items becomes dull. The sharp edge of the metal blade quickly "sits", which makes the tool unsuitable for use. And this is connected not only with the mechanical effect that occurs during contact with other solid objects. The blade becomes dull, even if not in use. Steel of any quality is susceptible to corrosion over time, which directly affects the sharpness of a thin edge. Therefore, such products must be constantly grind.
Periodic sharpening of sharp metal tools is also necessary in production. The quality of any industrial operations depends on the preparedness of the equipment for work. At manufacturing enterprises, tool sharpening is much more frequent, since under such conditions the load on the knives is higher.
A grinder is a necessary tool for solving industrial and domestic problems. A modern knife sharpening machine allows you to restore the sharpness of metal objects in a matter of seconds, while preserving the blade geometry as much as possible.
Optimum blade tilt
For effective use of the knife, it is important to sharpen the blade at a certain angle. During sharpening, the angle between the edges of the blade should be restored.
Each type of knife has its own recommended angle values:
- A knife for bread, vegetables and fruits - 15-20 degrees.
- Universal knife for different products - from 20 to 25 degrees.
- Tourist knife - 25-30 degrees.
- Knife for cutting hard materials - 30-40 degrees.
You can grind knives at the recommended angle manually using abrasive bars, grindstones. But to achieve the required angle of the blade in this case is quite difficult. To facilitate and accelerate this process, special devices have been developed - machines for sharpening knives. They are convenient to use and have a simple design.
What are knife sharpeners
This is an oversized electric device with fast-rotating abrasive disks. Compared with other tools for sharpening, machines allow you to set the sharpening angle as accurately as possible and process the blade in a 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 because of the high cost of these devices.
Modern electric sharpeners process blades with different types of edges. They can sharpen both from one side, and from two at the same time. Using the machine, it is possible to carry out all the stages of processing the blade, from the formation of the optimal cut cut to polishing.
Typically, 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 with expensive material, or set a more complex treatment for hunting, hiking and pocket knives. At the same time, you do not need to disassemble the machine. There is a control panel on the device’s body, with which you can select the necessary sharpening parameters.
An electric knife sharpener can be used both in the restaurant sector and for home purposes. In the first case, the application is fully justified. The high cost of the device pays off quickly.
Benefits of Electric Sharpeners
The electric knife sharpener is very popular. It allows you to sharpen the blade of any length and thickness with precision, preserving precisely the desired angle. Modern electric machines automatically detect blade tilt. The device perfectly sharpen knives with wavy blades.
Another advantage of this device is its versatility. Such a machine can be used for sharpening scissors, screwdrivers and other sharp tools. After grinding, the blade looks like new.
Typically, electric cars consist of several abrasive disks located 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 grinding machines is their long service life. Basically, such devices are equipped with ceramic or diamond coated grinding elements. Even with everyday use, the need to replace such knives is extremely rare. Homemade knife sharpeners can never be repaired.
Universal grinding 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, processing of knives with a sharpening angle of up to 15 degrees occurs, on the second - 15-20 degrees. The third uses composite disks that create a microscopic angle. This treatment allows you to create a thin cutting edge.
This type of machine is suitable for sharpening kitchen, camping and pocket knives.
Grinder
It is a professional tool with felt and abrasive wheels. Such a machine is used in production plants and in places of mass sharpening knives. Processing is carried out by professional workers who possess the necessary knowledge. A person without experience will not only not be able to sharpen the blade qualitatively, but also ruin it.
The professional machine for sharpening knives provides high sharpness of the blade, which lasts a long time.
DIY knife sharpener
If automatic sharpening devices cannot afford it, and manual grinding of knives is too long and inefficient, you can make a tool with your own hands. There are several versions of home-made designs, the manufacture of which requires very little time and effort.
To create a tool you need:
- abrasive bars or stones;
- emphasis for a knife.
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 with a thickness of 5 mm and use double-sided tape to glue sandpaper of different grain sizes on their surface. When using such a device, it is not recommended to make quick movements so as not to overheat the blade.
Sharpener made of wooden blocks
For the manufacture of this tool you will need two abrasive and wooden blocks of the same size. Procedure:
- Measure the desired sharpening angle and apply the appropriate marking on wooden blocks.
- Attach a grindstone to the marked lines and mark its width on both sides.
- According to the markings, make cuts with a depth of 15 mm.
- Insert abrasive blocks into recesses.
- Fasten the structure with bolts.