Come evitare la rottura dell'adattatore del gambo
Reasonable selection of shank adapter material and quality control
Material selection: The appropriate shank adapter material should be selected according to the specific working conditions of rock drilling. For example, for rock drilling operations with high impact frequency and high hardness rock, high-quality alloy steel materials can be used to make the shank adapter. Like chromium-molybdenum alloy steel, it has high strength and toughness, and can withstand large impact loads without breaking easily.
The hardness and toughness of the material should be balanced. Although the material is too hard, it may not be tough enough and easily break; while the material that is too soft has good toughness but poor wear resistance, and is prone to other failures due to excessive wear, which in turn causes fracture.
Quality inspection: When purchasing the shank adapter, its quality should be strictly checked. Through non-destructive testing techniques such as ultrasonic flaw detection and magnetic particle flaw detection, check whether there are defects inside the material. For example, ultrasonic flaw detection can detect defects such as pores and inclusions inside the shank adapter material to avoid using products with quality problems.
The manufacturing process of the shank adapter is strictly controlled to ensure its dimensional accuracy and surface quality. The shank adapter with the required dimensional accuracy can better cooperate with the rock drill and the drill rod, reduce the stress concentration caused by improper cooperation, and thus reduce the risk of fracture.
Optimize the working parameters of the rock drill
Control the impact pressure:
According to the hardness of the rock and the bearing capacity of the shank adapter, the impact pressure of the rock drill should be reasonably set. Before rock drilling, make a preliminary assessment of the rock. For softer rocks, the impact pressure can be appropriately reduced. For example, when drilling limestone, the impact pressure can be appropriately reduced compared to drilling granite to avoid unnecessary high impact loads on the shank adapter.
Install monitoring equipment such as pressure sensors to monitor the impact pressure in real time. When the pressure exceeds the set safety range, adjust the working parameters of the rock drill in time or stop working to prevent the shank adapter from breaking due to long-term excessive pressure.
Adjust the impact frequency: Avoid too high an impact frequency. Too high an impact frequency will cause the shank adapter to bear too much impact in a short period of time, increasing the risk of fatigue damage. The impact frequency should be reasonably set according to the material properties and working requirements of the shank adapter. For example, for some low-strength shank adapters, a lower impact frequency can be used in the early stage of rock drilling. After the hole is formed to a certain depth and the resistance is reduced, the frequency can be appropriately increased.
Correct installation and use
Installation inspection: Before installing the shank adapter, carefully check the connection between it and the rock drill and the drill rod. Make sure that the size of the connection part matches and there is no damage or deformation. For example, check whether the threaded part of the shank adapter is complete and whether the threaded connection with the drill rod is tight to avoid excessive local stress and breakage caused by improper installation.
During the installation process, the correct operating procedures must be followed. For example, when tightening the connecting thread between the drill rod and the shank adapter, use a suitable torque wrench to avoid over-tightening and subjecting the shank adapter to excessive axial force and torque.
Maintenance during use:
Regularly check the working status of the shank adapter. During the rock drilling process, pay attention to whether the shank adapter has abnormal vibration, heat, etc. If the shank adapter is found to be seriously heated, it may be caused by poor lubrication or excessive friction. The machine should be stopped in time for inspection and corresponding measures should be taken, such as adding lubricants, to prevent local overheating from causing material performance degradation and breakage.
Avoid extra lateral forces on the shank adapter. During the drilling process, keep the drill rod in the correct direction to prevent the drill rod from bending and subjecting the shank adapter to lateral forces. For example, when using a rock drill, ensure that its support is stable and the operator holds and operates the equipment correctly to reduce lateral forces caused by the shaking of the equipment.
