Worn bits perform particularly poorly, which will greatly affect the drilling efficiency. If you choose to replace a new drill bit, drilling costs will inevitably increase. Therefore, to reduce the drilling cost and improve the operating performance of the drill bit, it is extremely important to repair and grind the drill bit in time. So when should the rock drill bit be ground?
Generally, to obtain the maximum economic benefits, when the diameter of the grinding part of the drill bit is close to or reaches the button diameter, it should be ground. There are several cases: 1. when it is an inverted cone or the alloy is too protruding due to the wear of the bit body, it also needs to be ground. 2. Broken or damaged buttons caused by other reasons must be ground, prevent them from dropping slag and damaging other buttons.3. If the drilling rate is lower, the bit should be ground. 4. When the drill bit is drilling, even if the drilling speed is no problem and the button looks intact should be ground, it can eliminate the potential dangers in advance. If the carbide button wears heavily before grinding, it will not only cause internal stress to the system but also require more time for grinding, it adds the extra cost and wastes the button itself. Because the buttons have been ground, the carbide button grinding is better early than later. Finally, the grinding time should be specified. Regular and correct grinding can bring many benefits, with immediate results such as prolonging drill bit service life and improving drilling speeds.
Since there are so many benefits of grinding, what is the tool for grinding the drill bit?
Currently, grinding tools generally include grinding cups or wheels, all of which have a diamond coating. When using the grinding cup, the cutting speed in the middle is zero because it is on the rotating shaft. When grinding spherical button bits, it is necessary to swing the grinding tool. But this bit symmetry can be reformed when the grinding wheel is selected, as good cutting speeds can be gained on all cutting surfaces. All button-bit grinding machines (except the HS-type hand-held grinder) can be equipped with a grinding wheel so that even conical button bits can be ground.
In a word, timely and regular grinding of the drill bit can not only reduce the rock drilling cost of the company but also ensure the rock drilling efficiency. And with the improvement of the material and manufacturing process of the drill bit, the conditions for regrinding the drill bit are now available. Therefore, it is necessary for enterprises to regrind the rock drill bit.