How to use button/column drill bit
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The service life of the button bit is determined by the internal quality of the product, scientific selection and correct use method. Drill bit products are inherently inferior in quality, no matter how they are selected and carefully operated and used, the drilling footage (life) will not be high. On the contrary, no matter how good the quality of the product, no matter how scientific the choice is, improper methods in the operation and use of the product will also cause the product to fail prematurely and fail to perform to its level. The main specifications of the button bit are: 28, 30, 32, 36, 38, 40, 42, etc., using passivation treatment, longer service life, and its non-grinding life is about 5 times the life of the same diameter blade bit. -6 times.
In order to use the button bit correctly and ensure that the button bit is worn and discarded normally, the following points must be paid attention to:
1. According to rock conditions (hardness, corrosivity), drilling methods (open air, underground, tunnel drilling, production drilling, anchor hole drilling), powder discharge medium (compressed air, high-pressure water), rock drills (heavy, light, pneumatic, (Hydraulic) Select drill bit. Different ways of distributing teeth and discharging powder are suitable for different construction sites. See the attachment for typical button bit and recommended range of use. Choosing the correct drill bit is a prerequisite for obtaining the maximum drilling speed!
2. It is necessary to be stable when opening the hole, and the working parameters of the rock drill must be lowered to prevent the single tooth from being overloaded, causing broken teeth and tooth loss;
3. According to the rock drilling situation, adjust the working parameters of the rock drill in time, and adjust the impact, propulsion, and rotation parameters based on the standards of no sticking, fast drilling speed, and no bending of the drill rod. It can also be judged by measuring the temperature of the connecting sleeve between the shank tail and the drill rod: the normal temperature in the case of water discharge and powder discharge is ≤40℃, and the normal temperature in the case of compressed air discharge and powder discharge is ≤70℃;
Note: Do not stop water or gas during the use of the drill bit, otherwise it is very easy to cause the bit to be hot and cause the bit to break or lose its teeth and cause failure.
4. After a certain period of operation of the button bit, the alloy teeth and shell wear of the bit should be checked regularly. When the alloy teeth or the shell are found to be worn out, the relevant tools should be used for grinding in time to avoid affecting the drilling speed and preventing the inverted taper of the drill bit from causing sticking. If the alloy teeth and the shell are severely worn, in order to avoid the loss of the teeth and the fracture of the bit body, the new bit should be replaced in time.
5. Please notify our company in writing in time for the button bit that is abnormally scrapped in the early stage. The main contents of the notice include:
1) The model and actual working parameters of the rock drill used (impact pressure, impact power, impact frequency, propulsion force, rotation speed);
2) The model of the trolley used;
3) The manufacturer, specifications and usage conditions of the supporting shank, drill rod and connecting sleeve;
4) Rock type and hardness, construction location (open air, underground, tunneling, production, anchor hole, other), drilling construction method (downward, horizontal, fan, other), drilling depth;
5) Statistics on the failure of drill bits:
A. Failure mode (broken tooth, tooth loss, wear), life, quantity;
B. Button wear (residual height);
C. Planned service life;
D. Normal average service life;
E. Average service life of other manufacturers.
6. When the drill bit is drilling rock, ensure that there is sufficient water pressure or wind pressure to prevent excessive wear and sticking of the drill bit due to poor powder discharge, so as to increase the drilling speed.
7. When ordering button bit, you should specify the bit shape (E), button shape (hemisphere, bullet), number of teeth, connecting thread or provide physical samples.
