H22mm taper joint drill rod is one of the most productive drill products in China, and it is also widely used in underground mines and transportation engineering construction projects in China.In the process of rock drilling, a taper connecting rod can be equipped with a number of drill bit, drilling gun hole of different diameter;The drill rod will not be scrapped after the drill head is worn, with simple repair and low price;Per meter footage with less consumption and other characteristics.Is the domestic construction enterprises use the most rock drill products.
In recent years, with the increase of the impact power of the pneumatic leg drill used by the engineering construction units, the quality fluctuation of the drill rod produced by the original technology began to appear.The influence of stress wave on high frequency fatigue life of the product is studied according to the characteristics of bearing alternating stress and high fatigue performance of the rod body.Through high frequency fatigue simulation test, the mapping relationship between fatigue life and stress wave action of drill rod is basically mastered, which provides theoretical basis for further improving the anti-fatigue performance index of the product.By means of the cone connected drill in material, dressing technology and equipment, heat treatment and working load mechanism and damage analysis of research, decided according to the requirements of the slender rod product processing, from material selection, slender rods surface peening treatment, the implementation of the on-line heat treatment technology research and so on a series of crafts, formed a complete set of processing technology of high-end drill rod system, meet the demand of high-end industrial drilling tools.The third generation of taper connecting rod made in China by the improved new technology shows good performance in rock drilling tests compared with similar products made by other technologies.
