Problems that are easily overlooked in the use of drill pipe


1. The drill pipe is loose

In the early stages of use, newly machined and assembled parts have deviations in geometry and fit dimensions due to alternating loads (such as shock and vibration) and the effects of heat, deformation and other factors, combined with excessive wear and other The reason is that it is easy to loosen the originally fastened parts.

2. The drill tube wears fast

Due to the influence of 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 bearing condition of the surface is uneven. During the operation of the machine, the concave and convex parts on the surface of the parts fit into each other and rub against each other. , The metal debris that has fallen off, as abrasive, continues to participate in friction, which accelerates the wear of the matching surface of the parts. Therefore, the parts (especially the mating surfaces) are easily worn during the running-in period, and the wear rate is fast. At this time, if the overload operation is performed, it may cause damage to the parts and cause early failure.

3. Leakage of drill tube

Due to the loosening of parts, vibration and the influence of machine heat, leakage will occur at the sealing surface and pipe joints of the machine. Some defects such as casting and processing are difficult to find during assembly and debugging, but due to vibration and impact during operation, such defects are exposed, manifested as oil leakage (seepage) (water). Therefore, it is easy to appear during the running-in period. leakage phenomenon.

4. There are many mistakes in the operation of the drill tube

Due to insufficient understanding of the structure and performance of the machine. It is easy to cause malfunctions and even mechanical accidents due to operational errors.

5. Poor lubrication of drill pipe

Due to the small fit clearance of the newly assembled components, and due to assembly and other reasons. It is difficult to ensure the uniformity of the fitting clearance, and the lubricating oil (grease) is not easy to form a uniform oil film on the friction surface to prevent wear. As a result, the lubricating efficiency is reduced, and the early abnormal wear of the parts is caused.

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