Sharpening of drill angle when machining different materials
For drilling soft materials, the drill points can be sharpened. As to why such a grinding bit is made, it is because the harder material can hold the bit, so that the bit does not swing too much, and the diameter of the drilled hole can meet the requirements. Soft material drilling, if the drill is relatively flat, because the material is relatively soft, can not cover the drill bit, so that drilling out of the size of the hole is too poor.
For the sharpening of the drill, we should grind the drill at different angles according to the needs of the drilling. For example, a bit of drill bit drilled to a relatively hard material can grind larger (i.e. flat);
Generally, when drilling soft materials, the drill is best able to wear a bit of sharp, so that the drill bit centering, and drilling out of the hole size is not too bad. But if there is no special requirement, drilling with different angles can be used to drill different materials. In addition, the drill can be drilled at different angles on the same material as needed. For example, drilling on the same material, if the size of the hole requirements are relatively strict, the drill will have to sharpen a bit, so that the drill bit of centring is better, drilling out of the hole is relatively round. But if we drill deeper holes, it is better to wear them flat so that the bits are better and the chip is removed so that the cuttings in the deep hole can be smoothly discharged. In short, it is necessary to flexibly select different drilling bits according to the actual situation.
