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The main function of the rotation of the DTH impactor during the drilling process of the opening screw machine is to make the drill alloy turn a certain angle to impact the rock, and the speed of the DTH impactor is described in some domestic data. However, according to our experience, when impacting hard rock, every time the DTH impactor impacts, the edge teeth of the drill bit (the outermost alloy tooth of the drill bit) rotate 1/3~1/2 is more reasonable, and we have also proved through a large number of tests that the speed of the DTH impactor has an impact on the drilling speed of the rock drilling, and too fast or too slow has an impact on the drilling efficiency.
How to reasonably use DTH impactors and drill bits in the opening screw machine mainly has the following requirements:
The speed of the DTH impactor of the opening screw machine is not only related to the frequency of the impactor, the diameter of the drilling hole, the diameter of the edge tooth alloy of the drill, but also has a great relationship with the properties of the rock, the life and use cost of the drill bit in the drilling operation is very concerned about every user, so how to improve the service life of the drill bit needs to be discussed, and the reasonable speed selection can not only improve the drilling speed, but also improve the service life of the drilling tool and reduce the cost of use.
The speed of the DTH impactor of the opening screw machine is related to the following 5 factors, which are:
1. The relationship between speed and drilling diameter
The larger the borehole diameter, the lower the rotational speed
2. The relationship between rotational speed and hardness of rock formation< br/>
The harder the rock, the lower the rotational speed< br/>
3. The relationship between the speed and the size of the edge tooth alloy of the drill bit
The larger the alloy of the edge teeth of the drill, the higher the speed
4. The relationship between the speed and the frequency of the DTH impactor< br/>
The higher the frequency of the DTH impactor, the higher the rotational speed
5. The relationship between the speed and the air pressure of the air compressor
The higher the pressure of the air compressor to supply the DTH impactor, the higher the speed, the above is the little knowledge brought by Xiaobian for everyone, I hope to help you.
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