dth drilling hammer

Our country existing underground mining change, expansion project, the degree of mechanization construction will increase further, mines bit in the project of the open-pit mine, too usage will increase, should further improve dth drilling hammer the localization of form a complete set of drilling tools. Hydraulic drill to drill for drilling production is the present domestic weak links. Workers are drilling tools should be in raw material selection, smelting and rolling, brazing and heat treatment process was studied to further strengthen and improve the drilling drilling is appears along with the industrial revolution a tool products. Ingersoll rand companies in the United States in 1796, the invention of the steam driven rock drill, it USES the simple drilling and drilling tools. With the speeding up of industrialization process, the drill bit tools of production and development has been to move forward. In the 50 s production pneumatic drilling machinery in China, at the same time started drilling drilling production. In the early eighty s, growing into drilling products, product varieties types are also increasing. At the same time the production of drilling tools and research projects are also beginning to work, and translated into productivity. By the ninety s, China's industrial production has formed a certain scale of drilling tools, product type also basically satisfy the needs of the various fastest dth hammer infrastructure projects, part of products began to export volume, formed our own drilling drilling industrial production system. Column tooth bit have: 朴 32, 40, 42 朴 朴, such as product model, with no grinding, drilling speed and other characteristics, column tooth bit by YG13 alloy and 40 chrome steel by welding and become, has obvious advantages such as: time, manpower, connecting method is more simple, more durable and longer service life, etc. Column tooth bit and b22 drill pipe can be used, this bit of products are widely used in coal, iron ore, gold, copper, zinc, etc. Various grades of rock drilling engineering, mining, railway, tunnel, highway engineering construction, etc. Hole is easy to open the door, not sticking, round hole, drilling rate is higher, and coarse debris increase, broken is lower than work, the work surface dust concentration is low, the consumption of cemented carbide is less, the grinding cost is low, only downhole drilling should not be less than 40 mm in diameter.

Our vision for the development of drilling tools is very down the hole bit big also. Since the 1980 s, the rise of drilling industry penetration seepage in the coal mine coal production, coal mining machinery, road machinery, mixing blade, milling gear shaper, and so on. Is a kind of mines with tools, drilling tools used in eye drill hole in the rock or other structure, modern drilling well-known enterprises. Impact drill in drilling work rotation effect on the rock, and pass this force is to drill. Live head drill with integral drill drill points. Bit by bit, drill rod and steel collar (have no steel collar) and shank etc parts. In shallow hole drilling, the drill bit and drill rod connecting method has two kinds: one kind is to use threaded connection; The other is a conical connection. Threaded connection, processing complex drill bit, drill rod and use easy deformation and damage, so not commonly used. The current production of multi-purpose tapered connection. Tapered connection processing is convenient, simple, connection and disassembly is convenient. When assembling, as long as find end taper drill bit and drill rod of the same can be tightly packed together. If the assembly gap is too big, can mat soldering pad. Assembly brazing head end make drill rod and drill bit should be paid attention to the bottom of the trousers have 5 mm clearance, prevent the impact drill bit drop down.