Views: 0 Author: Site Editor Publish Time: 2022-06-08 Origin: Site
The foundation drilling manufactured by this process has strong wear resistance, good impact resistance, and long service life. After completing the drilling of 13 holes, the drill bit has no tooth loss or chipping phenomenon. So, what is foundation drilling welding performance analysis?
Here is the content list:
l Structural features
l Material characteristics
l Welding method selection
The foundation drilling structure to be welded is a three-wing concave type, that is, three blades are distributed on the periphery of the drill body, and there are two pillars in the middle. According to the hydraulic design, the width of each blade of foundation drilling is the same. The position of the socket, that is, the spatial position of the composite sheet on the bottom lip of the drill bit, is mainly determined by the cutting angle and the radial angle. The cutting angle is usually between 5° and 25° to suit the needs of different formations. For soft strata, the cutting angle should be smaller; for harder strata, the cutting angle should be larger to effectively cut the stratum and prevent impact damage to the composite sheet. The radial angle is generally 5° to 20° to facilitate the cleaning of the welding bit for the core barrel and the transfer of rock powder.
There are two types of substrates for foundation drilling: steel body and carcass body. The steel body type is mainly made of high-strength low-alloy steel, which has the advantages of simple manufacturing, short production cycle, and low material cost. The carcass type is made of tungsten carbide powder, nickel powder, and copper-tin alloy powder by sintering. Since the foundation drilling composite sheet is composed of a cemented carbide (tungsten carbide) substrate and a synthetic diamond sheet, the welding part of the heavy drilling bit for the foundation is cemented carbide. The carcass type has higher welding strength, better impact resistance, and longer service life than the steel body type, but its manufacturing process is complex, the process is many, the production cycle is long, and the cost is high.
At present, foundation drilling mainly adopts brazing, and the commonly used brazing methods include induction brazing and flame brazing. Heavy drilling bit for foundation induction brazing is a brazing method that is heated by the resistance heat generated by the induced current flowing through the workpiece. It has the advantages of fast heating speed and local heating of the workpiece. Flame brazing is heated by using combustible gas to blow air or pure oxygen to ignite the flame. According to the characteristics of foundation drilling welding performance, the high-frequency induction brazing method is selected.
RUIAN FLY MACHINE PARTS CO., LTD was established in 2006. After 15 years of development, FLY MACHINE has become a professional manufacturer mainly undertaking construction machinery parts that road Milling Bit, Trenching Bit, Forestry and mulcher teeth, Scarifier Blade Tools, Foundation Drilling bit, Mining and Tunneling bit, etc are our main products. The above is about foundation drilling welding performance analysis, if you are interested in Flat teeth for foundation drilling, weld-on teeth for boring holes, heavy drilling bit for foundation, you can contact us, our website is www.cuttingpicks.com.
