Yantai crushing hammer manufacturers to analyze the reason of rod fracture
點擊次數： 更新時間：19/08/15 11:13:08 煙臺華拓工程機械有限公司
The fracture of the broken hammer drill rod is a common situation when we use the product. The main reason for the phenomenon of the drill rod is that the material quality is not up to standard, there are bad points in the material, there are impurities in the material, etc., then how should we deal with these problems? The following yantai crushing hammer manufacturers tell you how to solve the problem of rod fracture.
The reason of the rod breaking is not only related to the quality of the steel, but also related to the erosion of mine water, heat treatment technology and drilling operation technology. When drilling, the drill rod is subjected to the frequent repeated impact and torsion about 2000 times per minute, and the compressive stress, tensile stress, bending stress and shear stress are alternating in the drill rod.
When these stresses reach or exceed the fatigue limit of the brazed steel, fine cracks (fatigue cracks) appear in the brazed steel. With the gradual expansion of these cracks, the effective fracture area of the brazed steel decreases correspondingly. When the cross section is reduced to the point where it can no longer bear the impact load or some accidental external load, brittle failure and fatigue fracture occur. Yantai crushing hammer manufacturers remind everyone that the mine water and underground moist air erosion, will accelerate the expansion of fatigue cracks in the steel.
In the process of forging and heat treatment of drill tail, shoulder and tip, the temperature is not good and the technology is not reasonable. Therefore, yantai crushing hammer manufacturers remind everyone, users in the use of the rod, once the product is found to be broken, it is necessary to timely take the above method to solve, so as to reduce the loss.