The problem of easy negligence in the use of drill pipe(rock drilling tools)
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1. The drill pipe(rock drilling tools) is loose
In the early stages of use, the newly processed and assembled parts have deviations in geometric shapes and matching dimensions, due to the influence of alternating loads (such as shock and vibration), heat, deformation and other factors, plus excessive wear and other factors. The reason is that it is easy to loosen the originally fastened parts.
2. The drill pipe(rock drilling tools) wears fast
Due to the influence of factors such as the processing, assembly and adjustment of new machine parts, the friction surface is rough, the contact area of the mating surface is small, and the pressure on the surface is uneven. During the operation of the machine, the uneven parts on the surface of the parts fit and rub each other , The metal scraps that fall off are used as abrasives and continue to participate in the friction, which accelerates the wear of the mating surface of the parts. Therefore, the parts (especially the mating surface) are likely to be worn during the running-in period, and the wear rate is fast. At this time, if the overload operation is performed, the parts may be damaged and early failures may occur.
3. Leakage of drill pipe
Due to the loosening of the machine parts, vibration and the influence of the machine's heat, there will be leakage at the sealing surface of the machine and the pipe joints. Some defects such as casting and processing are difficult to find during assembly and debugging, but due to vibration and impact during the operation, such defects are exposed, and they are leaking (seepage) oil (water). Therefore, the running-in period is easy to occur Leakage phenomenon.
4. Many drill pipe operation errors
Due to insufficient understanding of the structure and performance of the machine. It is easy to cause malfunctions due to operating errors, and even cause mechanical accidents.
5. Poor lubrication of drill pipe
Because the fit clearance of newly assembled parts is small, and due to assembly and other reasons. It is difficult to ensure the uniformity of the fit gap, and it is difficult for lubricating oil (grease) to form a uniform oil film on the friction surface to prevent wear. As a result, the lubrication efficiency is reduced, causing early abnormal wear of the machine parts, and in severe cases, the mating friction surface will be scratched or seized, leading to failure.
