Grinding method is as follows:

1. Soak the grindstone in water for one to five minutes. When there is oil, use some vegetable oil or other grease as lubricant.

2. Fix the grindstone with wood or base.

3. Press the blade on the grindstone at an angle of 15 degrees.

4. Grind from left to right or from right to left. It is easy to roll the knife without up and down planing, and the grinding is uneven.

5. When the brightness and sharpness of the blade begin to increase, it can be polished again with low density.

Extended data:

The milling cutter is used to process the die cavity or punch forming surface. Die milling cutter is evolved from end milling cutter, which can be divided into three types according to the working part shape: conical flat head, cylindrical ball head and conical ball head.

The carbide die milling cutter is widely used. In addition to milling various die cavities, it can also replace the hand file and grinding wheel head to clean the rough edges of casting, forging and welding parts, and finish some formed surfaces. The milling cutter can be used on pneumatic or electric tools, and its production efficiency and durability are dozens of times higher than those of grinding wheels and files.

Classification of milling cutter:

1. Sharp tooth milling cutter: Grind a narrow edge band on the back cutter face to form the back angle. Because the cutting angle is reasonable, its service life is high. The tooth back of the sharp tooth milling cutter has three forms: straight line, curve and broken line. Straight tooth back is often used for fine tooth finishing milling cutter. The cutter tooth strength of curved and broken line tooth back is good, and it can bear heavy cutting load. It is commonly used for coarse tooth milling cutter.

2. Relieving milling cutter: its back is machined into the tooth back of Archimedes helix by relieving (or relieving grinding). The blunt milling cutter only needs to regrind the front, which can keep the original tooth shape unchanged. It is used to manufacture various shaped milling cutters such as gear milling cutter.