Introduction
drill tool set is not concentric. The drill tail, connecting sleeve, and drill rod are not concentric, causing the bending deformation of the drill tool and generating stress, resulting in the joints of the drill tool set not matching, causing the joint parts to loosen.
Details
What are the reasons for excessive loss of drill tools?(1) The drill tool set is not concentric. The drill tail, connecting sleeve, and drill rod are not concentric, causing the bending deformation of the drill tool and generating stress, resulting in the joints of the drill tool set not matching, causing the joint parts to loosen. (2) The pushing pressure is too low, which reduces the rock drilling penetration efficiency, causes the combination to loosen, causes the energy transferred by the drill tool set to be lost, causes great stress, and causes instantaneous contact and separation of the contact joint end faces. Insufficient thrust pressure is manifested by the tool heating up and the joints clicking. Overheating causes abnormal thread wear and corrosion pits. If the pressure is too high, the drill bit rotation speed will be low, and there is a risk of drill sticking. At the same time, the bending stress of the drill pipe will increase. (3) Impact pressure If the impact pressure is not adjusted properly, it will directly affect the rotation speed, drilling efficiency and drill tool life. What should you pay attention to when using drill tools? Do you understand? Here are the answers (4) Rotation speed The rotation speed should match the diameter of the drill bit and the impact frequency of the rock drill. The larger the drill bit, the lower the rotation speed. If the rotation speed is too high, the periphery of the drill bit will be damaged. (5) Rotary pressure Normal rotary pressure is very important. It not only provides appropriate anti-jamming protection for the drill pipe, but is also the prerequisite for ensuring a certain rotary pressure. The increment of rotary pressure is a key factor in maintaining the tightness of the drill tool assembly. Insufficient tightness often results in heating of the connection parts, peeling of the thread surface, early wear and even breakage of the threads. (6) Improper use of the drill tool combination. If used with new drill tools, the service life of the drill tool will be shortened. In addition, the rod is not aligned when connecting, and there is sediment on the threads. It is also harmful to not apply lubricating oil when connecting the threads. It is easy to damage drilling tools.
