Hydraulic Rock Drills and Drill Bits
Release date:
2022-07-04
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Abstract
Hydraulic rock drills are a new type of drilling machine that has emerged in recent years. They can basically be divided into two main types: one is a compact, handheld model with relatively low impact energy, primarily used as a replacement for traditional pneumatic picks. Most of these models are designed to work in tandem with small excavators, loaders, hydraulic engineering vehicles, and other similar equipment. 1) Before starting the hydraulic rock drill, check whether the accumulator’s inflation pressure is normal; verify that the flushing water pressure and lubricating air pressure are set correctly; ensure there’s sufficient lubricating oil in the lubricator and confirm that the oil supply is appropriate; finally, confirm the rotation direction of the oil pump motor. 2) When drilling, position the thrust mechanism at the drilling location so that the front end makes contact with the rock. Carefully operate the drill to move it forward gradually until the drill bit touches the rock surface. For initial hole formation, gently advance the drill first. Once the drill rod is securely seated within the rock, fully engage the drill by moving the control lever to its maximum opening position. 3) If the drill fails to start drilling smoothly, first reverse the drill slightly, then carefully push it forward again to resume drilling. 4) When replacing the drill bit, lightly press the bit against the rock surface and simultaneously reverse the hydraulic drill motor—this will automatically disengage the old bit from the drill rod. 5) Hydraulic component maintenance must only be performed under exceptionally clean conditions. After dismantling any connecting mechanisms, immediately seal them with clean, tightly fitting plugs. Before reusing the repaired drill after servicing the hydraulic system, thoroughly circulate hydraulic oil through the entire circuit to flush out contaminants from the system components. 6) Regularly inspect the lubricator’s oil level and ensure proper oil supply. Periodically grease the gears of the rotating mechanism with high-temperature-resistant lubricant. Additionally, routinely check the oil level in the lubrication tank and remove any sediment or impurities accumulated inside. 7) If the drill is to be stored for an extended period, seal all oil ports tightly with protective plugs, thoroughly clean the machine, and completely drain the gas from the accumulator. Store the drill in a dry, clean environment. 8) Most modern hydraulic rock drills are equipped with buffer devices, while some heavy-duty models also feature recoil mechanisms. The primary function of the buffer device is to absorb the energy generated during the drill rod’s rebound, preventing the rod from transmitting excessive force to connected components and the machine body, thereby helping to extend the lifespan of both the drill rod and the machine itself. Meanwhile, the recoil mechanism is designed to deliver a reverse-impact force to the drill rod when it becomes stuck, enabling the operator to forcefully withdraw the rod from the borehole.
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