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.
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