Drilling Rod Hitting In The Process Of Hydraulic Breaker

Apr 04, 2020

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The power source of the hydraulic breaker is the pressure oil provided by the pumping station of the excavator or loader, which can more effectively clean the floating stones and the mud in the cracks of the rock during the excavation of the building foundation. The principle of selecting hydraulic large-sized breaker is to select the suitable hydraulic breaker according to the model of excavator and the working environment.

Drilling rod hitting in the process of hydraulic breaker

Drilling rods–The drilling rods used in the mine tunnel engineering are used to connect the drill bit and the rock drilling machine.The commonly used drill rods for the mine tunnel engineering are hexagonal hollow steel and hollow garden steel. The outer diameter of the garden steel is 32mm and 38mm. The steel brazing has finished steel brazing and forged steel brazing. The finished brazing is forged to a certain length and then directly installed on the drill head chisel. Shear the hexagonal steel, then forge the brazing tail and the brazing head with a forging brazing machine, and then install the brazing head chisel.

Alloy steel drill heads —- The commonly used drill heads for mine shaft engineering are straight alloy steel drill heads, and cross-type alloy drill heads are also used when drilling into hollow eyes; Y-type alloy drill heads and X-type alloy drill heads However, the cost of the flat drill is low. The flat alloy drill is inlaid. The solid carbide is inlaid on the matrix of the steel drill bit. The hard alloy can be reused after grinding.The drill specifications are generally 36mm — 44mm.

In the actual working process of the hydraulic large-scale breaker, the phenomenon that the drill rod is biased often occurs. In addition, the end of the drill rod and the impact surface of the piston are not absolutely flat, so lateral force will be generated, resulting in a strain on the piston.

Avoidance plan: First of all, to ensure the uniformity of the contact surface between the drill rod and the piston. Due to the slight deformation of the above-mentioned plane during the heat treatment process, after the heat treatment of the piston and the rod, a finishing process (two plane Flat); Secondly, the hardness of the drill rod can be appropriately reduced to prevent the drill rod from being broken and cracked by the piston during use. The hardness of the currently used drill rod is generally HRC55, which can be adjusted to HRC50 and reduce the horse in the quenching layer. The content of austenite increases its toughness. Finally, during use, the integrity of the guide sleeve in the cylinder and the front cylinder should be checked in time to prevent the piston from being eccentric during the stroke due to damage to the guide device.

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